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PISTON ENGINE . OCTf2012 1. When viewing engine from left & right side then from where we wil see a. Propeller end b. rear end c. accessory end d. both 2 & 3 2. Purpose of compressor ring a. To prevent oil from entering C.C. b. To prevent combustion gasses c. To prevent escape out of gasses d. All 3. Purpose of oil control ring a. Located above piston pin boss 4. Hydraulic valve tapet inspected at a. AT the time of overhaul 5. MTCS about Hydraulic valve tapeta. Donft lubricate at the time of installation. 6. Hydraulic valve lifters a. Eleminate adjusting of clearences. 7. Aviation gasoline are identified by a. Heat range b. Lead content TEL c. Colour d. Both b & c 8. MTCS Counterweight used for static balancing. PISTON ENGINE . OCTf2012 9. Spark plug used in yellow painted cylinder a. Long reach (ENGINES WITH LONG REACH SPARK PLUGS ARE IDENTIFIED BY YELLOW PAINT ON THE CYLINDER FINS BETWEEN THE SPARK PLUG HOLE AND THE ROCKER COVERS. ENGINES WITH SHORT REACH SPARK PLUGS HAVE NO IDENTIFYING COLOR.) b. Short reach 10. Cylinder head is made by a. Mg. alloy b. Al. alloy 11. Sun gear is used in . a. Spur planetary b. Bevel planetary c. Spur & pinion d. Both 2 & 3 12. Cylinder fires in A. Every two revolution of crankshaft B. Every four revolution of crankshaft 13. Diagram of valve Semi tulip valve (FAA 12 A pn 21) 14. Flange type propeller shaft a. Low power b. High power c. Medium power
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d. Both a & c 15. Break Horse Power means a. Actual power delivered to propeller PISTON ENGINE . OCTf2012 16. Gasket asbestos used in Ans Crankcase 17. Fuel or Liquid fires are a. Class B b. Class A c. Class C 18. Purpose of waste gate Ans To control volume of exhaust gases delivered to turbine 19. Cylinder wall is lubricated by A. Spray lubricated through connecting rod. 20. Other purpose of piston ring Ans Transmit heat to cylinder wall 21. Altitude increases then what will be the effect on Fuel/Air mixture a. Rich b. Lean c. No effect 22. Mixture control colour Ans Red 23. Centrifugal force on fly weight is opposed by a. Oil pressure b. Mechanical linkage c. Aerodynamic force 24. Centrifugal force on propeller blade opposed by a. Thrust bending force b. Torque bending force PISTON ENGINE . OCTf2012 c. Aerodynamic twisting force 25. Thrust & radial loads are taken by a. Plain bearing b. Ball bearing c. Roller bearing d. Both 2 & 3 26. Greater capacity are taken by a. Plain bearing b. Taper bearing c. Roller bearing 27. Explosion of fuel/ air mixture causes a. Burning b. After burning c. Detonation 28. Carburetor heat operation on ground causes a. Pre ignition
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b. Detonation 29. Which valve not used in basic fuel control unit a. Idle needle valve b. Power enrichment valve c. Fuel regulating valve d. Check valve 30. Viscosity is affected by Ans Temperature PISTON ENGINE . OCTf2012 31. Which units control the volume of airflow a. Throttle valve b. Butterfly valve c. Venturi 32. In idling system a. Air taken from main air bleed b. Air is not necessary c. A separate air bleed is taken as a part of idling system d. As in (a) & same asc. (FAA 12 A pn120) 33. Engine rough run idle a. Air filter dirty b. Restricted inlet c. Hole in intake pipe 34. Mostly filter is used Ans Full flow type 35. When turn off the switch a. Secondary lead grounded first b. P lead grounded first 36. Visual inspection of Detonation is indicated by a. Cylinder base nut loose b. Discoloration 37. Thermocouple is installed at a. Exhaust b. Cockpit c. Hottest cylinder 38. Camshaft & crankshaft is connected a. By gearing system PISTON ENGINE . OCTf2012 b. Directly 39. Economy ignition is indicated by Ans EGT 40. Oil consumption is high reason a. Piston ring worn out b. Piston pin break c. nta 41. Rocker arm is lubricated by a. Push rod b. Inner oil lines in cylinder
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c. Push rod housing d. All 42. Uneven compression is indicated by a. High CHT b. Rough idle speed c. Detonation d. Both a & c 43. Dirt in moisture cause Ans Oil contamination (Delcrane) 44. Electrical tachometer has a. Synchronous motor b. 3 phase synchronous motor 45. Oil temp. Bulb located a. Crank case b. Oil sump c. Oil screen (in wet sump after oil cooler ) PISTON ENGINE . OCTf2012 46. Fire extinguisher suitable is Ans Co. 47. Direct cranking electrical starter uses a. Series wound motor b. Shunt wound motor c. Direct current series wound motor 48. Direct cranking electrical starter Ans at rotor of synchronous motor 49. Pump used in piston engine a. Grotor pump b. Positive displacement pump 50. To prevent Spark plug fouling & preignition which oil is used a. Vegatable oil b. A-D oil 51. Purpose of Automatic mixture control Ans. Keep fuel air mixture ratio as altitude changes 52. In normal aspirated engine manifold pressure is a. More than Barometric pressure b. Equal to Barometric pressure c. Not more than Barometric pressure 53. Piston pin boss is measured by a. DTI b. Telescoping gauge c. Telescoping gauge & micrometer PISTON ENGINE . OCTf2012 54. Metal particles in oil found, indication of Ans. Internal failure of engine 55. Shorten V/v clearance
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a. Shorten V/v overlap b. Longer V/v overlap c. Insufficient v/v clearance 56. Manifold Pressure gauge indicates a. Pressure at carburetor b. Pressure at intake manifold 57. Manifold pressure is the pressure a. After cylinder b. Combustion chamber c. Before cylinder 58. Manifold pressure measures Ans Absolute pressure 59. How are the teeth of the gears in the accessory section of engine normally lubricated Ans By splash or sprayed lubrication 60. Oil cooler is located Ans Between scavenge pump & oil tank 61. Supercharger purpose a. Increase the weight of air b. Increase the wt. of fuel/air charge 62. Induction viberator PISTON ENGINE . OCTf2012 Ans Dc into pulsating ac 63. In diaphragm type pressure relief valve Oil warm P Increase Oil cold P decrease Ans. Oil tank vent clogged 64. Cooling in piston engine is done by a. Cowling b. Baffles c. . d. All 65. Torque is measured by a. Prony brake b. Dynamo meter c. Both 66. In ON- SPEED condition,governer flyweight is in which position a. Outward b. Inward c. Neutral 67. Rated power means Ans operation at all apeeds 68. Same as 67 69. Specific wt. of engine is a. Wt. of engine/bhp b. Wt. of engine/thp 70. Two types of magneto timing are a. Internal & external
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b. Internal & to the engine PISTON ENGINE . OCTf2012 c. External & to the engine 71. Magnetos are timed by a. To the engine b. By C.B. operation c. Both 72. Carbon fouling by a. Lean or rich mixture b. Lead deposit excessive c. Excessive thread lubricant d. All 73. Fast rpm drop a. Faulty spark plug b. Fouled spark plug c. Both a & b 74. Internal combustion engine a. Changes heat energy to mechanical b. Changes heat energy to kinetic energy c. Changes mechanical to heat energy 75. Thrust on propeller blade a. Perpendicular to plane of rotation b. Product of power c. Parallel to plane of rotation d. Both b & c 76. Sludge chamber is associated with a. Camshaft b. Crankshaft c. Engine PISTON ENGINE . OCTf2012 d. Propeller 77. Oil temp. bulb in dry sump lubrication system located a. Engine side & internal lubrication system b. Scavenge system c. Inlet & engine side of the engine 78. Governer maintains a. propeller rpm constant b. engine rpm constant 79. variable pitch propeller maintain a. engine speed constant b. propeller rpm constant 80. Stagered ignition is done for a. Dilution of fuel air mixture at exhaust b. To reduce vibration 81. In staggered ignition which spark plug fires first a. First exhaust side b. Both side c. First intake side

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82. Idle cut off occurs,slight rise in rpm is indicates a. Rich mixture b. Lean mixture c. Normal mixture 83. Enrichment system is set for PISTON ENGINE . OCTf2012 Ans delivery of rich mixture & maintain lean mix. At high altitude 84. Crack on cylinder head is indicated by a. Florescent b. Mpi c. Magnifying glass 10X 85. Primary engine instrument a. Tachometer b. Torquemeter c. CHT 86. Tachometer takes drive from a. Accessory section b. Crankshaft drive 87. Engine not attaining full power, failure of Ans. Leak in induction system 88. Valve operating mechanism of opposed engine is operated by a. Camshaft b. Camring 89. In diaphragm type pressure relief valve, as altitude increases P increases, as decreases P decreases then what will be the reason Ans. Pressure relief valve not adjusted properly 90. Gear rotation of camshaft a. Twice of crankshaft rotation b. Same as crackshaft PISTON ENGINE . OCTf2012 91. E gap altered a. Ignition timing altered/changed b. No spark c. Weak spark 92. Spark plug fouled results a. Engine stop b. Engine vibration 93. To increase engine power a. Volume of cylinder b. Combustion pressure c. Engine speed d. All 94. Propeller reduction gear system a. Increase power b. Limit the propeller rpm c. Increase thrust d. Both a & b

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95. Compression ratio is a. Ratio of BDC to TDC b. Ratio of TDC to BDC 96. Oil line separates then a. Oil is spills to overboard b. Oil is spills to engine c. Return to the tank or scavenge. 97. Thrust force a. Bend the propeller blade outside b. Bend the propeller blade forward PISTON ENGINE . OCTf2012 98. Impulse coupling becomes straight after engine starting by a. Spring force b. Centrifugal force c. Both a & b 99. In opposed engine during starting a. Induction viberator is used b. Impulse coupling is used 100. Cooling is done by a. Full rich mixture b. Full lean mixture [[{{ Dear Follwers If you have previous year DGCA question papers or other useful data then you can submit your question papers or data (with your name and details) here at aviatorslinks@gmail.com or you can share on facebook also and help other students in their exam preparation. We will publish ur document on our webpage with your name and details within 24 hr.
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