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1) The gap of spark plug generally should be: a. 0.1 mm b. 0.3 mm c. 0.5 mm d. 0.6 mm
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2) Magneto system is: a. Rotating armature type b. Rotating magnet type c. Both (a) & (b) d. None of these
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3) Contact breaker points is generally made have: a. Steel b. Copper c. Nickel d. Tungsten
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4) The material commonly used for insulator of spark plug is: a. Alumina b. Asbestos c. Copper d. Steel
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5) The life of spark plug used in 2-stroke engine as compared to 4-stroke engines is: a. Same b. Twice c. Thrice d. One-half
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6) Spark plug having white centre insulator indicates: a. Retarded ignition b. Leaded fuel c. Over advaned ignition d. All are correct
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7) A spark plug with a black center insulator indicates: a. Over advanced ignition b. Retarded ignition c. Stock-up choke valve in carburetor d. None of these
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8) Cold spark plug has: a. Long insulator b. Short insulator c. Very long insulator d. None of these
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9) Hot plug has: a. Long insulator b. Small thread c. Both (a) & (b) d. None of these
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10) Spark advance is associated to: a. Low speed engine b. Medium speed engine c. High sped engine d. Stemp engine
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11) In battery ignition system, the ignition fails due to: a. Heavy speed of engine b. Heavy use c. Not proper setting of breaker point d. None of these
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12) The common type of battery used in IC engines is: a. Dry battery b. Lead acid battery c. Both (a) & (b) d. None of these
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13) Lead mid battery is generally used in: a. Tractors b. Aircraft c. Light Motors d. None of these
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14) Charge of battery is measured in terms of: a. Density of electrolyte b. Weight of electrolyte c. Specific gravity of electrolyte d. All are correct
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15) In lead acid battery, percentage of sulphuric acid is about: a. 35% b. 50% c. 65% d. 75%
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16) Capacity of battery is expressed in tenns of: a. Amp power b. Voltage c. Amp-hour d. None of these
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17) Ignition timing depends on: a. Engine speed b. Compression ratio c. Valve timing d. All are correct
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18) The period petween start of injection and ignition is called: a. Ignition period b. Injection time c. Ignition delay d. All are correct
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19) Ignition delay of high-speed engine should be about: a. 0.01 second b. 0.001 second c. 0.0001 second d. None of these
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20) Ignition delay of low-speed engine: a. 0.01 second b. 0.002 second c. 0.003 second d. 0.004 second
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21) Starting motor consists of: a. Alternate current b. Direct current c. Both (a) & (b) d. None of these
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22) Starting motor is engaged with ring gear of engine with the help of: a. Bevel gear b. Helical gear c. Pinion gear d. Sliding pinion gear
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23) Alternator of a tractor engine is driven by: a. Gear system b. V-belt system c. Flat belt d. Chain sprocket
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24) Speed of alternator with respect to engine speed is: a. One-half b. Equal c. Twice d. Thrice
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25) Main function of fuel injection system is: a. To measure the correct amount of fuel as required by engine speed and load b. To maintain correct timing for beginning and end of injection c. To atomize the fuel in the cylinder d. All are correct
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26) Air injection system is mostly used in: a. Tractor's engines b. Petrol engines c. Heavy dusty stationary d. None of these
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27) In solid injection system, fuel pump is used for: a. Measure the quantity of fuel b. Forcing fuel into combustion chamber c. Metered the fuel d. All are correct
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28) In common rail system fuel is supplied by: a. One pressure line to all injectors b. Separate pressure line to all injectors c. Both (a) & (b) d. None of these
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29) In line system of injection, the pump used is: a. Constant stroke type b. Lapped-plunger type c. Both (a) & (b) d. None of these
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30) Pump used in inline system of injection is driven by: a. Camshaft b. Crankshaft c. Belt-pulley d. None of these
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31) In individual pump system, fuel is delivered to injector at a high pressure of: a. 500-1000 Kpa b. 1000-5000 Kpa c. 5000-10000 Kpa d. 10000-20000 Kpa
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32) Unit injector is also known as: a. Nozzle b. Atomizer c. Fuel valve d. All are correct
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33) Fuel injector is also known as: a. Nozzle b. Atomizer c. Fuel valve d. All are correct
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34) Hole type nozzle is generally used in: a. Open type combustion chamber b. Swirl combustion chamber c. Pre-combustion chamber d. None of these
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35) Pintle type nozzle is commonly used in: a. Pre combustion chamber b. Swirl combustion chamber c. Both (a) & (b) d. None of these
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36) Pressure in hole type nozzle varies from: a. 15-20 MPs b. 15-25 MPs c. 17-34 MPs d. None of these
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37) Pressure in pintle type nozzle varies as: a. 5-10 Mpa b. 7-15 Mpa c. 7-20 Mpa d. 10-25 Mpa
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38) In air injection system, fuel pump develop: a. High pressure b. Low pressure c. Very high pressure d. None of these
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39) The advantage of air injection system is: a. Good atomization b. Good mixing of air fuel c. Injection of heavy and viscous fuels d. All are correct
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40) Solid injection system has: a. Pressurizing unit b. Atomizing unit c. Both (a) & (b) d. None of these
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41) Solid injection system is also known as: a. Airless mechanical injection b. Air injection c. Jerk pump system d. All are correct
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42) Accumulator is used in: a. Jerk pump system b. Unit injector system c. Common rail system d. Distributor system
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43) The work of accumulator is: a. To develop high pressure b. To keep constant pressure c. To develop low pressure d. To metered fuel
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44) The size of hole of single hole nozzle is usually larger than: a. 0.1 mm b. 0.2 mm c. 0.3 mm d. 0.4 mm
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45) Governor is a device used in: a. Tractor engine b. Stationary engine c. Both (a) & (b) d. None of these
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46) The purpose of governor is: a. To maintain the constant speed of engine at different loads b. To protect the engine and attached equipment against high speed c. Both (a) & (b) d. None of these
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47) A governor automatically regulates: a. Flywheel speed b. Engine speed c. Speed of Rear wheel of tractor d. All are correct
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48) Hit and miss system of governor is to regulate the: a. Engine load b. Frequency of explosions c. Power strokes d. Both (b) & (c)
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49) Throttle system controls the: a. Engine load b. Amount of air fuel mixture c. Both (a) & (b) d. None of these
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50) Pneumatic governor is used on: a. Diesel engine b. Petrol engine c. Both (a) & (b) d. None of these
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51) A governor based on the principle that the change of pressure in one part of system produces an opposite change of much greater magnitude in other part is called: a. Centrifugal governor b. Pneumatic governor c. Hydraulic governor d. None of these
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52) Centrifugal governor is common in: a. Tractor engine b. Stationary engine c. Both (a) & (b) d. None of these
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53) The weight of centrifugal governor is to regulate the: a. Fuel control of diesel injection pump b. Load of engine c. Both (a) & (b) d. None of these
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54) The variation in engine speed is observed at full load and no load is approximate: a. 100 rpm b. 150 rpm c. 200 rpm d. 250 rpm
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55) The governor is used on tractor engine is called: a. Constant speed governor b. Variable speed governor c. Both (a) & (b) d. None of these
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56) The governor used on stationary engine is: a. Constant speed governor b. Variable speed governor c. Both (a) & (b) d. None of these
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57) Of the following which type of governing system is used in the gas engines? a. Hit and miss system b. Throttle system c. Variable speed governor d. Constant speed governor
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58) Throttle type governor is kind of: a. Constant speed governor b. Variable speed governor c. Hit and miss-governor d. Hydraulic governor
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59) Variation in engine speed at full load and no load is called : a. Pressure drop b. Speed drop c. Pressure hike d. Speed hike
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60) Centrifugal governor is directly connected with: a. Accelerator b. Engine speed c. Fuel injection pump d. None of these
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