Module Two 1. A force of 10 million Newton's is expressed numerically as a) 1 MN # b) 10,000 KN c) 10,000,000 MN 2. The SI unit of energy is the a) Pascal (Pa) b) Watt (W) # c) Joule (J) 3. The heat required to change a liquid to a gas is called the heat of a) fusion # b) vapourisation c) condensation 4. An atom with 3 free electrons is said to be # a) trivalent b) covalent c) pentavalent 5. The specific gravity of a substance is calculated by # a) the density of the body divided by the density of water b) density of the body multiplied by the density of water c) density of the body squared multiplied by the density of water 6. The most common refrigerants are # a) water, ammonia, freon b) water, freon, carbon dioxide c) ammonia, freon, methyl bromide 7. In fibreoptics the type of cable is chosen by # a) matching the diameter of the cable to the wavelength b) distance required to travel c) the strength of signal needed 8. What is the kinetic energy of an aircraft of mass of 2 metric tonnes and has a velocity of 2m/s? a) 2 kJ # b) 4 kJ c) 8 kJ 9. What is the mass number of an element? a) Number of electrons and protons # b) Number of neutrons and protons c) Number of electrons and neutrons Page 1 - Mod 2
10. What is the momentum of a ball of mass 2 grams and has a velocity of 10cm/s # a) 0.0002 kgm/s b) 20 kgm/s c) 5 kgm/s 11. What do you get when you add 2H2 and O2 a) H2O b) 2H2O2 # c) 2H2O 12. A time period of 10 microseconds is equal to a frequency of a) 10 kHz b) 1 Mhz # c) 100 kHz 13. When heat flows from a hot area to a cold area it is called a) convection # b) conduction c) radiation 14. the specific heat capacity of a gas heated at constant pressure, when compared to the specific heat capacity of a gas heated at constant volume, is a) the same b) less # c) more 15. A gyroscope suffers from apparent wander. This is due to a) friction on the gimbals and bearings b) the aircraft flying along a north/south track # c) the earth's rotation 16. The splitting of a chemical compound is called # a) analysis b) bombardment c) synthesis 17. The quadrature component of a vector is a) 180o to the original b) 45o to the original # c) 90o to the original 18. 1 Newton is equal to a) 1 joule per second b) 1 kilogram of force # c) 1 kilogram meter per second per second Page 2 - Mod 2
19. 1 degree rise on the centigrade scale will cause a a) 0.911 degree rise in Fahrenheit b) 33 degree rise in Fahrenheit # c) 1.8 degree rise in Fahrenheit 20. Adiabatic compression is when a) kinetic energy is gained # b) no heat is lost or gained c) heat is given off to the surroundings 21. You add 2 vectors together. The 3rd vector you get is called the a) sum # b) resultant c) component 22. What is the atomic number of an element? # a) The number of protons in the atom b) The number of electrons in the atom c) The number of neutrons in the atom 23. An atom with 5 free electrons is said to be # a) trivalent b) pentavalet c) covalent 24. The heat required to change a solid to a liquid is called the heat of # a) fusion b) vapourisation c) condensation 25. The SI unit of mass is the a) pound (lb) b) metre (m) # c) kilogram (kg) 26. The SI unit of acceleration is the a) square metre (m2) # b) metre per second squared (m/s2) c) metre per second (m/s) 27. The SI unit of density is the a) cubic metre (m3) b) Pascal (Pa) # c) kilogram per cubic metre (kg/m3) 28. Latent heat is the a) heat required to raise the temperature of a body by 1 oC # b) heat required to change the state of a body c) heat required to raise 1kg of matter by 1K Page 3 - Mod 2
29. 1 Calorie is equal to a) 400 J b) 40 J # c) 4 J 30. 1 BTU equals # a) 1055 Joules b) 1055 kJ c) 1055 Calorie 31.The intensity of radiated heat is a) directly proportional to distance from the source of the heat # b) inversely proportional to the square of the distance from the source of the heat c) not effected by the distance from the source of the heat 32. As a block of ice is melted (to 4oC) its volume a) increases # b) decreases c) remains the same 33. A material with a gradually varying refractive index is said to have a a) step index b) single index # c) graded index 34. A slug is a unit of # a) mass b) weight c) speed 35. If an object in air is submerged in a liquid or a gas its weight will a) increase b) decrease # c) remain the same 36. As an object slides down a slope, its # a) kinetic energy increases and its potential energy decreases b) kinetic energy decreases and its potential energy increases c) kinetic energy increases and its potential energy increases 37. If a body starts at rest and reaches 84 m/s in 3 seconds, its acceleration is # a) 28 m/s2 b) 14 m/s2 c) 252 m/s2 Page 4 - Mod 2
38. The speed of sound in air at 0oC is approximately # a) 331 m/s b) 181 m/s c) 3 x 108 m/s 39. If a material is loaded excessively and is permanently deformed, it is said to be a) stressed # b) strained c) stretched 40. The height of water required to produce a head pressure of 1 bar is a) 9.81 m b) 11.09 m # c) 10.19 m 41. The SI unit of pressure is the a) kilogram per metre cubed (kg/m3) # b) Newtons per metre squared (N/m2) c) Cubic metre (m3) 42. The SI unit of force is the # a) Newton (N) b) Pascal (Pa) c) Metre (m) 43. The SI unit of velocity is the # a) metre per second (m/s) b) metre per second squared (m/s2) c) metre (m) 44. The SI unit of momentum is the # a) kilogram metre per second b) kilogram / metre (kg/m) c) metre squared (m2) 45. The formula for calculating stress is a) load multiplied by cross sectional area # b) load divided by cross sectional area c) area divided by load 46. A gauge indicates 15 PSIG. What is the absolute pressure? a) 0.3 PSI b) Zero PSI # c) 30 PSI
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47. Fibre optic cables are capable of transmitting light at a) 3 x 108 m/s # b) 1.99 x 108 m/s c) 0.99 x 108 m/s 48. Step index fibres suffer from # a) dispersion b) scatter c) attenuation 49. Attenuated pulses have their sizes and shape restored by # a) regenerators b) opto-isolators c) impedance matching transformers 50. Attenuation in fibre optic cables is caused by a) backscattering and microbends # b) absorption and scattering c) microbends and scattering 51. If a wave traveling to a point meets a wave traveling from that point, of equal frequency # a) a standing wave is formed b) the two waves cancel each other out c) they will have no effect on each other 52. For a concave lens the image is a) a chromatic orb b) real # c) virtual 53. What shape is a venturi tube? a) Gradually tapering to a minimum cross sectional area b) Maximum cross sectional area in the centre # c) Minimum cross sectional area in the centre 54. If a fluid moves slowly it has # a) high viscosity b) low viscosity c) medium viscosity 55. In a fibre optic flying control system a) the sensor requires electrical power # b) the sensor and the transmitter require electrical power c) the transmitter requires power
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56. Photons in a semiconductor are stimulated to produce excess photons to be emitted. This is a a) photodiode b) LED # c) laser diode 57. In a fibre optic flying control system, which of the following are used # a) multi mode b) single mode c) dual mode 58. A fibre optic cable is attenuated at 29 dB/metre. This is referring to a) allowable loss # b) the figure allowed when calculating power gain c) the maximum cable run allowed in the system 59. The fibre optic receiver is a # a) photodiode b) laser diode c) light emitting diode 60. Regenerators are used in fibre optic systems to reduce a) dispersion # b) attenuation c) random emission 61. An atom consists of a) protons and electrons b) protons and neutrons # c) protons, neutron and electrons 62. The maximum number of electrons in the inner shell of an atom is # a) 2 b) 4 c) 8 63. A good refrigerant has a) high condensing pressure, high evaporating temperature # b) high condensing pressure, low evaporating temperature c) low condensing pressure, high evaporating temperature 64. Stress is given by a) extension per original length # b) force per unit area c) force per original length
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65. An object accelerating down a slope would gain kinetic energy # a) equal to the potential energy lost b) greater than the potential energy lost c) less than the potential energy lost 66. Quality of sound depends upon a) quality of the receiver b) pure sound waves being produced by the source # c) frequency and harmonics of the waves being produced 67. Temperature is a measure of a) the heat energy of particles # b) the amount of vibration of particles c) the amount of friction produced by two mating surfaces 68. In a heat pump a) flow across the condenser is always in one direction b) the compressor gains heat # c) the condenser loses heat 69. Precession in a gyro is a) inversely proportional to the magnitude of the torques applied # b) proportional to the magnitude of the torque applied c) proportional to the square of the magnitude of the torque applied #
70. Particles vibrating in air a) produce waves b) tend to give off heat c) tend to give off light
71. The force which opposes twisting deformation is a) strain b) shear # c) torsion 72. A gyro with a fixed point free to rotate in three axis is a) an earth gyro b) a space gyro # c) a tied gyro 73. When light rays enter a medium with a different refractive index they # a) change speed b) change direction c) reflect 74. A converging lens can focus light rays because # a) it is a sphere b) the incoming rays are already converging c) the light rays travel more slowly at the centre Page 8 - Mod 2
75. The mass of a proton equals the mass of a a) beta particle b) electron # c) neutron 76. Catalysts a) slow down reactions # b) speed up and slow down reactions c) speed up reactions 77. A force perpendicular to a beam produces what type of stress? a) compressive # b) shear c) tensile 78. What temperature scale is used with the combined gas law? a) centigrade b) Fahrenheit # c) Kelvin 79. If a ray of light enters a fibre optic cable with a refractive index of 1.5, what is the speed of the ray in the cable? # a) 200,000 kilometres per second b) 300,000 kilometres per second c) 400,000 kilometres per second 80. A graded index fibre optic cable has # a) a variable refractive index across its cross sectional area b) a sudden change in refractive index c) a constant refractive index across its cross sectional area 81. Which of the following will not transmit pressure? # a) solid b) liquid c) gas 82. Charles' Law states that # a) volume varies directly with temperature b) volume varies inversely with temperature c) volume equals pressure x temperature 83. Boyle's law states that a) pressure varies directly with volume # b) pressure varies inversely with volume c) pressure equals temperature divided by volume
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84. Convection does not occur in # a) solids b) liquids c) gases 85. A mirror a) reflects all light # b) absorbs a percentage of light c) refracts all light 86. If the outer shell of an atom is full the the element is a) unstable / reactive b) a good conductor # c) practically inert 87. Which law describes the relationship between potential energy, kinetic energy and pressure # a) Bernoulli's law b) Charle's law c) Newton's third law 88. Molecules of the same compound are held together by a) adhesive forces # b) cohesive forces c) gravitational forces. 89. The width of a multimode fibre optic cable is # a) 100 µm b) 10 µm c) 1 µm 90. The fundamental frequency is the # a) 1st harmonic b) 2nd harmonic c) 3rd harmonic 91. The first overtone of a sound wave is the a) 1st harmonic b) fundamental frequency # c) 2nd harmonic 92. Oxygen has a valency of # a) 2 b) 6 c) 8
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93. A process where volume does not change is # a) isochoric b) isobaric c) isothermic 94. A process where heat is not transferred to or from a gas is a) isochoric b) isobaric # c) adiabatic 95. A varying refractive index is a a) step index # b) graded index c) single index 96. The further from the nucleus the shells are in an atom a) the closer the shells get to each other # b) the further the shells get from each other c) the shells retain the same spacing from each other 97. What determines an element's identity? # a) The number of protons b) The number of neutrons c) The number of electrons 98. An isotope of an element will have more a) protons # b) neutrons c) electrons 99. Refractive index is # a) the speed of light in air divided by the speed of light in the medium b) the speed of light in the medium divided by the speed of light in air c) the speed of light in air multiplied by the speed of light in the medium 100. The smallest part of an element is a) a molecule # b) an atom c) a compound 101. A process where pressure does not change is known as a) isochoric # b) isobaric c) isothermic
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102. The extension of a spring can be determined using a) Charles' Law # b) Hooke's Law c) Newton's 2nd Law 103. The nucleus of an atom contains a) protons and electrons # b) protons and neutrons c) electrons and neutrons 104. What is the speed of light in km/s a) 3 x 108 # b) 300,000 c) 3000 105. Relative density is # a) density of medium density of water b) density of water density of medium c) density of water x density of medium 106. What is the boundary layer? # a) The layer of still air (due to friction) around the aircraft skin b) The outer layer of electrons in an atom c) The thickness of the insulation of a cable 107. What is atomic mass? a) Number of neutrons b) Number of protons # c) Number of protons plus the number of neutrons 108. An aircraft flies 1350 nmiles in 2h 15mins. What is the average speed a) 150 nmiles/hour b) 600 miles/hour # c) 600 nmiles/hour 109. A spring extends 7 cm to the ground and back again 20 times a minute. What is the period? a) 1/3 cycle # b) 3 seconds c) 7 cm 110. A solid melted into a liquid will take up a) the same amount of space b) more space # c) less space Page 12 - Mod 2
111. A cyclist goes from rest to 50 m/s in 5 seconds. What is the average acceleration? a) 12 m/s2 # b) 10 m/s2 c) 8 m/s2 112. What form of heat is used to turn a solid into a liquid? a) specific heat b) coefficient of heat # c) heat of fusion 113. When a steel bar is overstressed, what is the name of the point at which it does not return to its original form after the load is released? # a) yield point b) ultimate point c) Young's modulus 114. When a liquid is heated, it expands # a) more than a solid b) less than a solid c) more than a gas 115. If pressure on a liquid increases, whilst temperature is held constant, the volume will a) increase b) decrease # c) remain constant 116. What is 1 btu in joules per kilogram a) 9.18 J/kg # b) 2346 j/kg c) 4128 j/kg 117. Two pure tones of similar frequency are heard by a person. What will they hear? # a) A beat of the two tones b) One pure tone c) Two tones 118. If you push an object with a force of 5 N for 10 m in 4 seconds, how much power is used? a) 200 Watts b) 8 watts # c) 12.5 watts 119. The focal point of a mirror is a) the radius b) 2 x the radius # c) 1/2 the radius Page 13 - Mod 2
120. 2 couples with magnitude F act against each other. The resultant will be a) 2F b) - 2F # c) 0 121. The height of mercury required to give 1 bar is # a) 760 mm b) 700 mm c) 1000 mm 122. A vessel has 25 ml of water which produces 10 kPa. If another 125 ml of water is added, what will be the pressure in the vessel a) 40 kPa b) 50 kPa # c) 60 kPa 123. 2 hydraulic jacks with different diameters have the same fluid pressures entering at the same rate. They will extend at a) the same rate # b) different rates c) the same rate until the smaller jack becomes full 124. The standard for measuring pressure is # a) +20oC and 760 mm of mercury b) 0oC and 760 mm of mercury c) -20oC and 700 mm of mercury 125. What load can be lifted on jack B?
#
a) 100N b) 200N c) 300N
126. What is the period of a frequency of 4 Hz? a) 4 seconds # b) 0.25 seconds c) 8 seconds Page 14 - Mod 2
127. A dot rotates around the circumference of a circle. If the vertical position of this dot is plotted on a graph with respect to time the result will be # a) a sinusoidal waveform b) a transverse waveform c) a linear motion 128. A process where temperature remains the same is known as a) isobaric b) isochoric # c) isothermic 129. What is Boyle's Law? a) P is proportional to T b) P is proportional to 1/T # c) P is proportional to 1/V 130. Dew point is a) the temperature that condensation occurs when heating a gas b) the cooling of gas where no condensation occurs # c) the temperature that condensation occurs when cooling a gas 131. What is the speed of light in air at 0°C a) 331 mm/s b) 331 m/s # c) 300 m/µs 132. A process where heat is not transferred to or from a gas is known as a) isochoric b) isobaric # c) adiabatic 133. How far will light travel in one year? # a) 9.46 x 1015 m b) 1.5 x 1011 m c) 3 x 1015 m 134. Two sound waves of the same frequency and amplitude are moving half a wavelength out of phase with each other. What will be heard? # a) Nothing b) Twice the volume of one of the sound waves c) Half the volume of one of the sound waves 135. Water is most dense at # a) +4oC b) 0oC c) -4oC Page 15 - Mod 2
136. Which type of circuit is used when the temperature of the source has insufficient heat for thermocouple application? a) Temperature bulb b) Balanced bridge # c) Thermistor 137. The most common method of expressing pressure is in a) grams per square inch b) inch pounds per square inch # c) pounds per square inch 138. The difference between two pressures is # a) differential pressure b) vacuum pressure c) static pressure 139. The impact pressure caused by the impression of air against the opening of a a) static port is pitot pressure # b) pitot-tube is pitot pressure c) pitot-tube is static pressure 140. Static pressure is present in a) the pitot tube b) any ram air port # c) undisturbed air 141. What torque loading would you apply to a nut if the force is 50 lbs, exerted 2 feet from its axis? # a) 100 lbs.ft b) 251 lbs.ft c) 600 lbs.ft 142. When different signals are transmitted down a fibre optic core, are they distinguished by a a) star coupler b) active filter # c) passive filter 143. In a jack with a ram only on one side and hydraulic fluid applied from both sides # a) the ram will move to the side where the ram is, due to pressure acting on differential areas b) the ram will move opposite to the side where the ram is due to pressure acting on differential areas c) a condition of hydraulic lock exists and no movement will take place Page 16 - Mod 2
144. Using the same hydraulic pressure, the force applied by a hydraulic jack of 4 sq inch piston area a) will be equal to that applied by a similar jack of 2 sq inch piston area # b) will be twice that applied by a similar jack of 2 sq inch piston area c) will be half that applied by a similar jack of 2 sq inch piston area 145. A pressure of 100 psi act on two jacks in a hydraulic system piston area 2 sq in and 4 sq in a) the smaller jack will exert a force of 50 lb and the larger a force of 25 lb b) the two jacks will exert the same force # c) the smaller jack will exert a force of 200 lb and the larger a force of 400 lb 146. on an Optical Time Domain Reflectometer (OTDR),the attenuation is a) derived from a graph b) dialed into OTDR # c) read from the cathode ray display 147. The purpose of an accumulator in a hydraulic system is to a) collect air from the hydraulic fluid, thus reducing the requirement for frequent bleeding b) relieve excess pressure # c) store hydraulic fluid under pressure 148. If the hydraulic system accumulator has a low air pressure, it will cause # a) rapid pressure fluctuations during operation of services b) rapid movement of the operating jacks c) slow build up of pressure in the system 149. The specific torque loading for a bolt is 50 lbs.ins but an extension of 2” is needed to reach the bolt in addition to the 8” torque wrench. What will the actual reading? a) 54 lb.ins # b) 40 lb.ins c) 60 lb.ins 150. If 1500 psi hydraulic pressure is pumped into an accumulator, with a pre-charge air pressure of 1000 psi the gauge will read a) 2500 psi b) 1000 psi # c) 1500 psi 151. A compressor increases a) kinetic energy # b) potential energy c) moving energy Page 17 - Mod 2
152. P1 x V1 / T1 = P1 x V2 / T2 is a) Charles' law b) Boyle's law # c) Ideal gas law 153. V1 / T1 = V2 / T2 # a) Charles' law b) ideal gas law c) Boyle's law 154. P1 x V1 = P2 x V2 a) Charles' law # b) Boyle's law c) ideal gas law
at a constant pressure is
at a constant temperature is
155. Change from solid to gas state without going through liquid state is called a) state leap b) transformation # c) sublimation 156. 1 CHU = Centigrade Heat Unit = 1400 ft lbs = energy to raise a) 1 lb of water by 1° F # b) 1 lb of water by 1° C c) 1 kg of water by 1° C 157. 1 BTU = 778 ft lbs to raise = a) 1 kg of water to heat up by 1° F b) 1 lb of water to heat up by 1° C # c) 1 lb of water to heat up by 1° F 158. 1 HP = 33000 ft lbs / min or 500 ft lbs / s or # a) 746 Watts b) 736 Watts c) 1360 Watts 159. 1 Watt = a) 1 HP # b) 1 Joule/s c) 1kg/h 160. Temperature change -1.98°C per 1000 ft up to 36,000 ft where it remains constant at a) - 56°F b) - 52°C # c) - 56°C Page 18 - Mod 2
161. A freely falling body, falling from a height of 2km, and assuming g = 10m/s2, will strike the ground in a time of # a) 20s b) 80s c) 400s 162. What is the angular velocity of a shaft rotating at 300rpm in radians/second? a) 5pi radians/second b) 2pi radians/second # c) 10pi radians/second 163. If a machine has a mechanical advantage of 10 and a velocity ratio of 20, the efficiency of the machine is a) 2 # b) 0.5 c) 200% 164. The force that acts on a body to cause it to rotate in a circular path is called the a) centrifugal force # b) centripetal force c) inertia force 165. A temperature of 41 degrees Fahrenheit is, in Centigrade is # a) 5 degrees b) 9 degrees c) 7 degrees 166. Heat is defined as a) the stored energy in a hot body # b) energy in transit c) a high temperature 167. An aircraft of 2 metric tones uses 800 kilojoules kinetic energy to make an emergency stop. Its brakes apply a force of 10 kiloNewtons. What distance does it travel before it comes to a stop? a) 40m # b) 80m c) 800m 168. What is the smallest particle of matter that can exist in nature? a) A molecule # b) An atom c) An isotope
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169. A positive ion a) has extra electrons # b) has missing electrons c) is a radioactive isotope 170. Radiant heat # a) heats up the intervening medium b) does not heat up the intervening medium c) is generated by fast moving electrons 171. A pilot requests 9.2 tones of fuel. The bowser driver reports to the pilot that the specific gravity is 0.8, what will the uplift be? a) 7360 liters # b) 11500 liters c) 9200 liters 172. A molecule with like atoms is said to be a a) compound # b) element c) neutroid 173. Specific gravity is measured in # a) is measured in Kg/m3 b) is measured in g/m c) has no units 174. Two elements in the same substance is said to be a # a) compound b) element c) mixture 175. A mass on a spring nearly hits the ground 20 times a minute, its frequency is a) 3 cycles per second # b) 1/3 cycle per second c) 20 cycles per second 176. A process where heat is given off to its surroundings is called a) Adiabatic # b) Isothermal c) Isobaric 177. A body travelling at 20 m/s accelerates to 36 m/s in 8 seconds, what is its acceleration? a) 8 m/s2 b) 4 m/s2 # c) 2 m/s2 Page 20 - Mod 2
178. Temperature is a measurement of the a) amount of kinetic energy stored # b) amount of vibration in particles c) amount of heat possessed by a body 179. A converging lens can focus because # a) it’s surfaces are spherical in shape b) light is slower in the centre of the lens compared to outer extremities c) light is already converging 180. In a flat surfaced mirror, the angle of reflection is # a) equal to the angle of incidence b) less than the angle of incidence c) more than the angle of incidence 181. A body which is allowed to expand when heated, expands past the pressure imposed on it and # a) work is done b) a force is produced c) nothing will happen 182. A body dropped from 10 m will hit the ground in # a) root 2 seconds b) 2 seconds c) 1 second 183. 600K is equal to # a) 326.85°C b) 873 °C c) 853 °C 184. The number of protons in an atom is equal to the number of # a) electrons b) neutrons c) mass number 185. The charge of an electron is a) positive # b) negative c) neutral 186. In a fiber optic flying control system # a) the sensor does not require electrical power b) the electronic processor requires power before transmission c) the sensor requires power for the electronic processor Page 21 - Mod 2
187. In a multimode fiber optic cable, the # a) diameter is greater than the wavelength b) diameter is equal to the wavelength c) diameter is less than the wavelength 188. Quality of sound is dependant on # a) number and pitch of harmonics b) frequency of the supply c) medium it is traveling through 189. A mass on a spring nearly hits the ground 20 times a minute. Its time period is # a) 3 seconds b) 1/3 second c) 7 cm 190. A mass of 400kg moves 27 meters with a force of 54N. What is the work produced? # a) 1458J b) 10.1kJ c) 583.2kJ 191. When gases change temperature/pressure, the scale used is # a) Kelvin b) Degrees Centigrade c) Degrees Fahrenheit 192. A valance electron is an electron # a) in the outermost shell b) in the innermost shell c) which is not within an atom 193. Molecules of unlike atoms are combined by # a) adhesive force b) cohesive force c) gravitational force 194. What is the difference between hydrogen, deuterium and tritium? a) The number of protons # b) The number of neutrons c) The number of electrons 195. The smallest material in the universe is a) an ion # b) hydrogen c) helium Page 22 - Mod 2
196. What is the atomic number?
#
a) 3 b) 4 c) 7
197. What is the mass number?
#
a) 5 b) 4 c) 9
198. What is the rate of gravity? # a) 9.81 m/s2 b) 0.981 m/s2 c) 12.7 m/s2 199. Convert 100oC to Kelvin a) 173K b) 273K # c) 373K 200. What is 1 joule in calories? a) 4.186 # b) 0.239 c) 252 201. Young's modulus is? a) strain / stress # b) stress / strain c) stress x strain 202. The isotope of a carbon atom C14 to C12 will have # a) same numbers of protons b) same numbers of neutrons c) same number of electrons 203. If an atom have 2 protons, how many electrons will it have a) 8 # b) 2 c) 1
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204. 1kg of water is heated from 0oC to 2oC. Does its volume # a) decrease b) stay the same c) increase 205. A fire engine is approaching you with its siren on. As it passes you does its pitch a) increase # b) decrease c) stay the same 206. A body rotating at an angular velocity of 5 radians/sec, with a radius of 5metres has a speed of a) 5&pi meters per second b) 5 meters per second # c) 25 meters per second 207. A mass of 400 kg moves 27metres, with a force of 54N, what is the work produced # a) 1458 J b) 10.1 KJ c) 583.2 KJ 208. A cylinder filled with water to half a meter will exert a pressure of a) 4.9 pa b) 49 pa # c) 4900 pa 209. A mass of 10kg placed 2 meters away from a pivot will have a moment of # a) 196 NM b) 20 NM c) 50 NM 210. 25 liters of fuel exerts a pressure of 10KPa, if a further 125 liters is added, the pressure will now be a) 50KPa # b) 60KPa c) 40KPa 211. The quantity of heat developed by burning 1 kg of fuel is known as a) radiant heat b) latent heat # c) heat of combustion 212. The transfer of heat through radiation is achieved by a) warming up the intervening medium b) not warming up the intervening medium # c) the application of radioactive isotopes Page 24 - Mod 2
213. 1 kW is a) 1.56 HP # b) 3413 btu per hour c) 360 Joules 214. 1000 lb/in2 is in an accumulator. If 3000 lb/in 2 of hydraulic fluid is pumped in, what is the pressure on the air side? a) 4000 lb/in2 b) 1000 lb/in2 # c) 3000 lb/in2 215. A converging lens converges light rays because a) the light source is already converging # b) the light waves move slower in the centre of the lens than they do at the extremities c) it is not a sphere 216. Coded light waves of varying wavelength travel down a fiber optic cable. To separate them at the other end you would use a) a star coupling # b) a passive filter c) an active filter 217. - 40°C in Fahrenheit is minus # a) - 40°F b) 72°F c) 8°F 218. Absolute zero is a) 0°C b) 273.15 K # c) - 273.15°C 219. A 4.5 kW electric motor is 90% efficient. How much energy does it use in 20 seconds? # a) 100 kJ b) 90 kJ c) 2.25 kJ 220. An optical fiber has attenuation. When using an OTDR # a) dial in the known attenuation b) the shape of the curve will tell you how much attenuation there is c) ignore it 221. One degree on the Centigrade scale is equal to what on the Fahrenheit Scale a) 12°F # b) 1.8°F c) 33°F Page 25 - Mod 2
222. The dew point is a) the point at which air can be heated b) the point when air is cooled at which the moisture does not condense # c) the point when air is cooled at which the moisture just starts to condense 223. What are common refrigerant agents? a) Dry ice, methyl bromide, water # b) water, Freon, ammonia c) formaldehyde, ammonia, carbon dioxide 224. during a process of gas heating, no heat is absorbed or given out. It is a) isothermal # b) adiabatic c) isochoric 225. during a pressurizing process, all heat is given away. It is # a) isothermal b) adiabatic c) isochoric 226. A fractional decrease in volume of a material when it is compressed is a) compressive stress b) compressive strain # c) bulk modulus 227. There are solids, liquids and gases present in the universe and every unit of theirs occupy some space. This is called # a) matter b) mass c) compound 228. A material capable of going direct from solid to gas is a a) substance b) substrate # c) sublimate 229. A particle vibrating in air produces a) light b) heat # c) a wave 230. The composition of the atmosphere is approximately a) 4/5 oxygen and 1/5 nitrogen b) 2/5 oxygen and 3/5 nitrogen # c) 1/5 oxygen and 4/5 nitrogen Page 26 - Mod 2
231. Transfer of heat from a hot area to a cold area is # a) conduction b) convection c) radiation 232. An atom has three electrons in its outer shell. It is # a) trivalent b) tetravalent c) trevalent 233. A ram has a piston with 2 sq.in2. Another ram with a piston of 4 sq.in2 will # a) double the force b) square the force c) have the same force 234. An atom deficient of a valency electron is deficient # a) of an electron in the outer shell b) of a neutron in the outer shell c) of an electron in the inner shell 235. The maximum number of electrons in the second shell is a) 2 b) 4 # c) 8 236. What is meant by adiabatic? # a) No heat crosses the boundary b) All heat crosses the boundary c) Some heat crosses the boundary 237. What does an oxygen atom consist of? # a) Protons, neutrons and electrons b) Protons and electrons c) Protons and neutrons 238. What type of fiber optic cable is used on aircraft? a) Single mode # b) Multi mode c) Multi core 239. Surface molecular attraction between two different molecules is a) cohesive # b) adhesive c) gravitational
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240. The atomic mass number is the number of # a) protons plus neutrons b) protons plus electrons c) neutrons plus electrons 241. An object travels 18 km in 1 minute 30 seconds. What is its average speed? # a) 200 m/s b) 100 ms c) 270 m/s 242. Ignoring friction, if you let an object slide down a slope, at the bottom a) the potential energy is more than the kinetic energy b) the potential energy is equal to the kinetic energy # c) the kinetic energy is more than the potential energy 243. A pile driver of weight 1000 kg, hits a post 3 m below it. It moves the post 10 mm. Assuming gravity = 10 m/s2, what is the kinetic energy of the pile driver? a) 45 kJ b) 90 kJ # c) 30 kJ 244. What frequency is a tone which is 4 times the fundamental frequency? a) 3rd harmonic b) 2nd overtone # c) 3rd overtone 245. What is the standard temperature and pressure for measuring the density of gases? a) 20°C and 760 mm of mercury # b) 0°Cand 760 mm of mercury c) -20°C and 700 mm of mercury 246. If a gas is heated and its temperature is raised by 1K what happens to its volume? # a) Increases by 1/273 b) Decreases by 1/273 c) Remains the same 247. If a block of ice melts in a glass of water, the level if water in the glass will a) rise # b) fall c) remain the same Page 28 - Mod 2
248. How much force is exerted by piston if it is subjected to a pressure of 3000 psi and has surface area of 2.5 m 2? # a) 7500 N b) 1200 N c) 3000 N 249. Intensity of sound waves a) vary directly as per distance from source # b) varies inversely as the square of distance from source c) is not affected by distance 250. Ten kilograms is expressed numerically as # a) 10 kg b) 1 Mg c) 10 K 251. A force of 10 million Newton’s is expressed numerically as a) 1 MN b) 10 mN # c) 10 MN 252. A milliliter is equal to a) one million liters b) one millionth of a liter # c) one thousandth of a liter 253. If a square has an area of 9m2, the side is a) 3 m2 # b) 3 m c) 3 sq. m. 254. A mass of 3kg weighs approximately # a) 6.6 LB b) 1.3 LB c) 0.675 N 255. 100 m is approximately a) 66 yards # b) 109 yards c) 220 yards 256. A car moves over a distance of 5 miles at steady speed in 10 minutes. What is the speed? # a) 30 mph b) 60 mph c) 15 mph Page 29 - Mod 2
257. A spaceship travels a distance of 480,000 miles in 2 days. What is its speed? # a) 10,000 mph b) 48,000 mph c) 36,000 mph 258. A cyclist covers a distance of 1,000 m at a constant speed in 90 seconds, what is his speed? a) 10 m/s # b) 12.5 m/s c) 50 m/s 259. How long will it take a car moving at 60 km/hr to travel 90 km? a) 40 minutes b) 75 minutes # c) 90 minutes 260. An aircraft travels at 500 km/hr for 30 minutes at steady speed. How far does it move in that time? a) 500 km # b)250 km c) 1000 km 261. Which of the following affect the velocity of an object? a) Speed and distance b) Speed and mass # c) Speed and direction 262. Acceleration involves # a) change in speed or direction of movement b) change of position with time c) steady speed over a fixed period of time 263. What acceleration is produced if a mass increases speed from rest to 10 ft/sec in 5 seconds? a) 50 ft/sec2 b) 0.5 ft/sec2 # c) 2 ft/sec2 264. A car traveling at a speed of 5 m/s accelerates at the rate of 1 m/s 2. How long will it take to reach a speed of 20 m/s? a) 20 secs # b) 15 secs c) 10 secs 265. Newton’s laws of motion apply to a) solid substances only # b) all substances irrespective of state c) gases and liquids only Page 30 - Mod 2
266. Which of Newton’s Laws apply to an aircraft which is accelerating down a runway? a) The 1st law # b) The 2nd law c) The 3rd law 267. Which of Newton’s Laws apply to a car which is slowing down due to the braking action? a) The 1st law # b) The 2nd law c) The 3rd law 268. F = ma is an equation which expresses a) Newton’s 1st law # b) Newton’s 2nd law c) Newton’s 3rd law 269. What force is required to produce an acceleration of 5 m/s 2 on a mass of 2 kg? a) 2.5 N b) 10 kg # c) 10 N 270. The British unit of mass is a) the kilogram # b) the slug c) the Newton 271. If a force of 10 lbf produces an acceleration of 2.5 ft/sec 2 on what mass is it acting? # a) 4 slugs b) 25 slugs c) 4 lb 272. What is acceleration? a) Rate of change of position # b) Rate of change of velocity c) Rate of change of movement 273. Power is the rate of doing work, it is measured in a) Joules x Seconds # b) Joules/Seconds c) Watts/Seconds 274. Fahrenheit may be converted to Celsius by using the equation a) C° = 9/5 x F° + 32 # b) C° = 5/9 x (F° - 32) c) C° = 5/9 x F° - 32 Page 31 - Mod 2
275. A vector quantity is a quantity which a) possesses sense only # b) possesses sense, magnitude and direction c) possesses direction only 276. One atmosphere is equal to a) 28.9 inches of hg b) 1.22 kg/m2 # c) 14.7 lbf/in2 277. Strain is calculated by # a) Extension ÷ Original Length b) Original Length ÷ Extension c) Original Length ÷ Stress 278. In a gear train the Driver has 100 tpi and the Driven as 50 tpi. # a) The driven rotates twice as fast b) The driven rotates half as fast c) The driver and driven rotate at the same speed. 279. In fiber optics. The fiber cable has a refractive index of 1.5, what is its speed? # a) 200 meters/microsecond b) 300 meters/microsecond c) 400 meters/microsecond 280. A catalyst in a chemical reaction does what? # a) Speeds it up b) Slows it down c) Can either speed it up or slow it down 281. A material, which has a varying refractive index has a # a) step index b) single index c) double index 282. What is the number of electrons in the inner shell of an atom? a) 4 b) 8 # c) 2 283. What form of heat is used to turn a solid into a gas? a) Specific heat # b) Latent heat c) Sensible heat
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284. When a twisting force is applied to a bolt, what stress is exerted on to the head? a) Shear b) Compressive # c) Torsion 285. When you over stress a steel bar, what is the point called where it does not return to its original form? a) Deformation limit b) Plastic limit # c) Elasticity limit 286. A cyclist goes from rest to 50m/s in 5 sec, what is the average acceleration? a) 12m/s # b) 10m/s c) 8m/s 287. If heat is constant, if pressure increases on a liquid what will the volume do? a) Increases b) Decreases # c) Remains constant 288. What shape is a venturi tube? # a) Narrow in the middle b) Wide in the middle c) Cone like 289. What is 1 BTU in joules per kilogram? a) 9.18 joules per kilogram # b) 2326 joules per kilogram c) 4128 joules per kilogram 290. Radiant heat of a body, heated from a radiant source is a) proportional to distance b) inversely proportional # c) inversely proportional to the square of the distance 291. A ray of light that travels through the centre of curvature before being reflected, how is it reflected? # a) Reflected through the focal point b) Reflected through the centre of curvature c) Neither 292. What will the image produced through a divergent lens be? a) Real # b) Virtual c) Negative Page 33 - Mod 2
293. When a beam of light passes from one medium to another with a different refractive index, what will happen to the beam of light? # a) Change speed b) Total internal reflection c) Total internal refraction 294. A fiber optic cable has different refractive indexes across its diameter, it is a) step index # b) graded index c) single mode 295. The formula for calculating shear is a) force x area # b) force ÷ area c) force ÷ cross-sectional area 296. Combined gas law relates volume, pressure and # a) temperature b) velocity c) density 297. An aircraft of 2 metric tones lands with 400 kilojoules of energy, 10 kiloNewtons of force is applied at the brakes, how far does the aircraft take to stop? a) 400 M # b) 40 M c) 800 M 298. If a car travels 18km in 1 ½ minutes, what is it velocity in m/s? # a) 200 m/s b) 150 m/s c) 100 m/s 299. Three common types of refrigerant are # a) dry ice, freon, ammonia b) ammonia, freon, methyl bromide c) dry ice. Methyl bromide, ammonia 300. The heat required to change a liquid to a gas at constant temperature is the heat of a) fusion # b) vaporization c) condensation 301. An atom with a full outer shell is a) a good conductor # b) practically inert c) a good insulator Page 34 - Mod 2
302. Light traveling from air to water, the waves are a) bent more # b) bent less c) not bent 303. A pilot requests 9.2 tones of fuel to be put on board his aircraft. The specific gravity of the fuel is 0.8, how many liters are put on board? # a) 1158 liters b) 732 liters c) 389 liters 304. An element with a full valence shell is a) good conductor b) very reactive # c) inert 305. A force 10 N is placed 2 Meters from a pivot point, what is the moment? a) 196 N.M. # b) 20 N.M. c) 80 N.M. 306. The heat given off by burning a 1kg block of wood is a) latent heat # b) radiant heat c) transmissive heat 307. If a light is beamed at a flat mirror what is the angle it reflects at? # a) Angle of incidence b) Reflective index c) Reactive angle 308. In a graded index multi mode fiber is the refractive index a) high b) low # c) alternates high and low 309. A fiber optic cable is attenuated at 29dB/Metre. This is referring to a) allowable loss # b) the figure that has to be allowed for when calculating power gain c) the maximum cable run allowed in the system 310. The fiber optic receiver is a # a) photodiode b) laser diode c) light emitting diode Page 35 - Mod 2
311. The standard temperature and pressure for measuring the density of liquids is a) 0°C and 760 mmHg # b) 4°C and 760 mmHg c) 15°C and 760 mmHg 312. The standard temperature and pressure for measuring the volume of liquids and solids is # a) 20°C and 760 mmHg b) 20°C and 700 mmHg c) 0°C and 760 mmHg 313. Pure semiconductors have a) many holes b) large amounts of free electrons # c) few free electrons 314. H20 in what form holds most energy a) Ice # b) Steam c) Water 315. If a tensile load is placed on a bar it will # a) stretch b) bend c) crush 316. Compressibility is a) stress/strain # b) strain/stress c) stress x strain 317. A radar rotates 1 revolution each 30 seconds and uses 10J of energy each revolution. How many joules does it use in a day? # a) 28.8 kJ b) 720 kJ c) 7200 kJ 318. The usable bandwidth of a fiber is determined by a) the angle of total internal reflection # b) the intermodal dispersion c) the wavelength of the light 319. A block of metal is melted. It will a) increase in volume # b) decrease in volume c) remain the same volume Page 36 - Mod 2
320. How would you work out the work done by a machine assuming it is 100% efficient? # a) Mechanical advantage and input b) Input and output c) Mechanical advantage and output 321. A block slides down a slope. Assuming there is no friction # a) kinetic energy is gained at the same rate as potential energy is lost b) kinetic energy is gained at a greater rate than potential energy is lost c) potential energy is gained at a greater rate than kinetic energy is lost 322. Specific gravity is a) kg/m3 # b) pure numbers c) m/s2 323. A body of 10 kg is swinging attached at the end of a 2m pole. What is its moment at the bottom? # a) 196 NM b) 20 NM c) 80 NM 324. The transfer of heat from a hot place to a cold place is called a) convection # b) conduction c) radiation 325. A light aircraft flies in a semi-circle from point A to point B. If the circle has a radius of 20km and the time taken is 30mins, the average speed is? # a) 125.7 km/h b) 80 km/h c) 110 km/h 326. The landing speed of an aircraft is 54 m/s. If the maximum deceleration is 3m/s2 the minimum length of runway required is a) 162m b) 360m # c) 486m 327. The number of radians in a semi circle are a) exactly 3 b) 2pi # c) pi Page 37 - Mod 2
328. the angular velocity of 500 rpm is, in rads/seconds is equal to a) 1000pi rads/s # b) 16.66 rads/s c) 8.33 rads/s 329. The work done in lifting a mass of 2000 kg vertically to a height of 40 meters is # a) 784.8 kj b) 80 kj c) 500 kj 330. If, with a concave mirror the image is placed beyond the centre of curvature, the image produced will be a) real, erect and larger b) real, inverted and smaller # c) virtual, erect and larger 331. The power of a lens is calculated from the # a) reciprocal of the focal length b) product of the focal length and its distance from the pole c) focal length squared 332. In a standing wave the point where continuous vibration of maximum amplitude occurs is called the a) node # b) anti-node c) harmonic 333. the name given to sounds below that which the human ear can detect, i.e. below 20Hz is a) ultra sound b) sonic pitch # c) infra sound 334. The speed of sound in dry air is 331 m/s. In a solid the speed would # a) increase b) decrease c) stay the same 335. A substance of two or more different atoms is # a) a chemical compound b) a neutrino c) an isotope 336. An atom with 5 electrons in its outer shell is # a) trivalent b) pentavelant c) covalent Page 38 - Mod 2
337. 1 KW is equal to a) 252 BTU # b) 1.34 HP c) 1000 Joules 338. What atmospheric conditions will cause the true landing speed of an aircraft to be highest? # a) High temp, high humidity b) Low temp, high humidity c) Head wind, low humidity 339. If a tuning fork is struck and held close to the ear and slowly rotated about the vertical axis, in one rotation how many times is there no sound? a) 4 # b) 2 c) Sound is audible for the whole revolution 340. What type of friction requires the greatest force to overcome it? a) Rolling friction # b) Static friction c) Dynamic friction 341. Which of Newton's laws relates to the formula: Force = mass x acceleration a) 1st # b) 2nd c) 3rd 342. A 6000 kg engine is lifted off a wing to a height 0.5 meters and then pushed across the hangar 24 meters. The force required to push the trolley is 12 kN. What is the work done to move the trolley? a) 298kJ # b) 288kJ c) 84MJ 343. What is the phenomenon that occurs when a siren that approaches you, at the point of passing, the pitch decreases? a) Resonance b) Echo # c) Doppler effect 344. Viscosity is known as # a) the internal resistance for a fluid to flow b) fluids flowing in a straight line c) Newton's 1st law of motion
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345. How lift on a wing is produced can be derived from a) Charles law # b) Bernoulli's Theorem c) Faraday's law 346. In a fiber optic system which components use the laser? # a) Single mode laser for the transmitter b) Single mode laser for the oscillator c) Single mode laser for the transmitter and the oscillator 347. Single mode optic fiber cable will a) cause distortion to the light wave at the output end which is dependent upon the length of the cable b) have several light rays to pass # c) have diameter matched to wavelength of light passed 348. When an emergent light wave enters a divergent lens # a) it will focus behind the lens b) it will focus beyond the lens c) it is s spherical 349. in the concave mirror, light rays parallel to mirror axis will be reflected # a) through the focal point b) parallel to mirror axis c) back to the centre of curvature 350. Protons have # a) positive charge b) negative charge c) no charge 351. If gyro is constrained to an external reference and has three degrees of freedom it is a) a space gyro # b) a tied gyro c) an earth gyro 352. in a concave mirror, a light ray passing through the focal point will be reflected a) through the focus b) parallel to the axis # c) on the centre line of the mirror 353. A passive sensor a) requires power for the sensor # b) does not require power c) requires power for the transmitter Page 40 - Mod 2
354. Structures designed to withstand compression are called a a) tie # b) strut c) beam 355. 1 Pascal equals # a) 1 N/m sq. b) 105 N/m sq. c) 10 Nm 356. A vector is a physical quantity which possesses a) a magnitude only # b) magnitude and direction c) magnitude direction and sense 357. Producing a compound from commonly available materials is a) analysis b) bombardment # c) synthesis 358. A different number of nucleons in the nucleus of atoms would represent a) isotones # b) isotopes c) semiconductor 359. Molecules of matter are in constant motion. The amount of vibration or motion is dependent on # a) temperature b) pressure c) volume 360. The addition of 2 different vectors to produce a vector is called a) sun # b) resultant c) component
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