Automobile Engineering Model Questions

1. During the compression stroke of a four stroke diesel engine, the piston compresses :
(A) Air fuel mixture
(B) Atomised diesel
(C) Diesel Vapour
(D) Air

2. The inventor of two stroke engine is :
(A) Dugald Clark
(B) Rudolf diesel
(C) James Watt
(D) Nicolaus A Otto

3. Theoretically during expansion process in a four stroke engine :
(A) Inlet valve opens and exhaust valve closes
(B) Inlet valve closes and exhaust valve opens
(C) Both valve remains closed
(D) Both valve remains opened

4. The nominal volume of cylinder when piston is at TDC is called :
(A) Stroke volume
(B) Swept volume
(C) Clearence volume
(D) Suction volume

5. Which of the following engine can operate at higher speed?
(A) Square engine
(B) Over square engine
(C) Under square engine
(D) Steam engine

6. The process of flushing out the products of combustion from the engine cylinder by fresh charge is known as:
(A) Turbo charging
(B) Super charging
(C) Scavenging
(D) None of the above

7. The injection pressure in CRDI system is upto:
(A) 180 bar
(B) 1080 bar
(C) 18000 bar
(D) 1800 bar

8. When the piston of a two stroke. Single cylinder engine move from BDC to TDC?
(A) transfer port open and intake port closes
(B) exhaust port open and transfer port closes
(C) exhaust port and transfer port opens
(D) none of these

9. The number of Crankshaft for opposed piston engine is:
(A) One
(B) Two
(C) Three
(D) four

10. The ratio of Brake thermal efficiency to indicated thermal efficiency is known as :
(A) Mechanical efficiency
(B) Relative efficiency
(C) Air standard efficiency
(D) Calorific value efficiency

11. Chemically correct air fuel mixture ratio for SI engine is around :
(A) 15:1
(B) 9:1
(C) 6:1
(D) 12:1

12. In Otto cycle, the addition of heat takes place at :
(A) Constant pressure
(B) Constant volume
(C) Partially at constant pressure
(D) Any of the above

13. Which of the following is true for a two stroke engine?
(A) fuel efficiency is more than four stroke engine of same size
(B) higher oil consumption
(C) used for two wheelers only
(D) eco friendly

14. Which type of nozzle can be used for facilitating pilot injection before the main injection?
(A) Single hole nozzle
(B) Multi hole nozzle
(C) Pintle nozzle
(D) Pimtaux nozzle

15. At the ventury throat of the Carburettor the velocity of air is :
(A) Maximum
(B) Decreases
(C) Increases
(D) Remains same as before

16. The condition at which the engine operates at no load and with nearly closed throttle is known as :
(A) Dieseling
(B) Cruising
(C) Idling
(D) None of the above

17. The reference fuels used for comparing the anti knock value of SI engine fuel is :
(A) Benzene and tetraethyl lead
(B) Iso octane and normal! Heptane
(C) Normal cetane and alpha methyl naphathalene
(D) Benzene and iso octane

18. Releasing of clutch pedal causes :
(A) Load on release finger
(B) The compression of pressure spring
(C) Pressure plate move away from clutch disc
(D) Pressure plate move towards clutch disc

19. Clutch shaft is also known as:
(A) Transmission input shaft
(B) Counter shaft
(C) Lay shaft
(D) Main shaft

20. Throw out bearing is used to:
(A) reduce friction on clutch disc
(B) engage the clutch
(C) disengage the clutch
(D) none of the above

21. Excess clutch free pedal play causes :
(A) Clutch slipping
(B) Difficulty in gear shifting
(C) Wear of release bearing
(D) Wear of clutch disc

22. Which of the following is not a function of final drive of heavy vehicle?
(A) final speed reduction
(B) power transmission
(C) reduction of torque
(D) none of the above

23. Which of the following is not an advantage of overdrive?
(A) Fuel economy
(B) Increase of torque
(C) Reduced engine wear
(D) High vehicle speed at low engine speed

24. The torque is measured in :
(A) N-m
(B) Nm/Second
(C) N/m
(D) N/m2

25. The part of synchromesh gear box which is splined to the transmission output shaft is :
(A) Synchroniser sleeve
(B) Synchroniser ring
(C) Mainshaft gear
(D) Synchroniser hub

26. Idler gear is used to engage :
(A) First gear
(B) Synchroniser ring
(C) Reverse gear
(D) Top gear

27. The tendency of front wheel drive cars with unequal length of half shaft to pull to oneside during acceleration is known as:
(A) Torque steer
(B) Self steer
(C) Power steer
(D) None of the above

28. Torsion bar is also known as:
(A) Stabilizer rod
(B) Anti roll bar
(C) Trailing rod
(D) Radius rod

29. In Macpherson type suspension system shock absorber is mounted on:
(A) Lower whish bone
(B) Upper whish bone
(C) Strut
(D) Spring

30. Leaf springs are connected to frame through shackles for:
(A) reduce friction
(B) avoid breaking of spring
(C) avoid rolling of vehicle
(D) none of the above

31. Torsion bar is attached to.:
(A) Lower arm
(B) Upper arm
(C) Shock absorber
(D) Steering knuckle

32. Exhaust gas recirculation system is chiefly means to reduce the emission of :
(A) CO
(B) CO2
(C) NO2
(D) SO2

33. Which of the following is not an effect of increased amount of exhaust gas recirculation?
(A) engine brake power decreases
(B) specific fuel consumption decreases
(C) brake specific fuel consumption increases
(D) none of the above

34. The catalyst used for the reduction of NOx in three Way catalytic converter 18 :
(A) Platinum
(B) Palladium
(C) Rodium
(D) All of the above

35. The speed of distributor cam is –
(A) same as engine speed
(B) half of engine speed
(C) one fourth of camshaft speed
(D) none of the above

36. The dwell angle for a four cylinder engine is in the range of :
(A) 48° to 52°
(B) 55° to 70°
(C) 36° to 42°
(D) 10° to 32°

37. The condensor in ignition system 15 mounted :
(A) On ignition coil
(B) On distributor cap
(C) Outside the distributor
(D) Inside the distributor

38. The secondary terminal of Ignition coil is connected to :
(A) Ameter
(B) Distributor cap
(C) Spark plug
(D) Battery

39. Which of the following unit is used to express the capacity of condensor?
(A) Tesla
(B) Webber
(C) Candela
(D) micro farads

40. The specific gravity of electrolyte can be checked with :
(A) Hygrometer
(B) voltmeter
(C) multimeter
(D) hydrometer

41. Open circuit voltage of a 12V lead acid battery in fully charged condition is:
(A) 2V
(B) 2.5V
(C) 12.6V
(D) 14V

42. The voltage of each cell of alkaline battery is :
(A) 12V
(B) 2.2V
(C) 6.2V
(D) None of the above

43. The speed of generator at which its output voltage just rises above the voltage of battery being charged is called :
(A) Cut in speed
(B) Synchronous speed
(C) Run off speed
(D) Run out speed

44. The purpose of brushes in alternator of automobiles is:
(A) To collect current from rotor winding
(B) To collect current from stator winding
(C) To convey current from battery to stator
(D) To convey current from battery to rotor

45. In an alternator current is induced in :
(A) Rotor winding
(B) Stator winding
(C) Carbon brushes
(D) Slip rings

46. In starter motor the field coils are wound around :
(A) Commutator
(B) Pole shoes
(C) Yoke
(D) None of the above

47. The reflector used in automobile head lamp is of :
(A) Spherical shape
(B) Hemispherical shape
(C) Hyperbolic shape
(D) Parabolic shape

48. The purpose of filling inert gasses inside the bulb is –
(A) to reduce filament temperature
(B) to avoid dazzling effect
(C) to avoid vapourisation of filament
(D) none of the above

49. Metal halide type HID head lamps are popularly known as:
(A) Mercury vapour lamp
(B) Xenon lamp
(C) Low pressure sodium lamp
(D) High pressure sodium lamp

50. Transfer case is used in :
(A) front wheel drive vehicles
(B) rear wheel drive vehicles
(C) four wheel drive vehicles
(D) all of the above