1000+ Automobile Engineering Multiple Choice Question Answer [Solved]

1. What type of bearing is used for main bearings and connecting rod bearings?
A. Ball bearings
B. Plain bearings
C. Needle roller bearing
D. Taper roller bearing
Answer : B

2. The ignition coil is used to
A. Step up current
B. Step down current
C. Step up voltage
D. Step down voltage
Answer : C

3. If clearance volume of I.C. engines is increased, the compression ratio will
A. Increase
B. Decrease
C. Remain constant
D. Be doubled
Answer : B

4. A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
A. 400 cm³
B. 600 cm³
C. 1200 cm³
D. 2400 cm³
Answer : B

5. The ball joints are used on the tie rod ends, because they
A. Reduce the amount of noise generated
B. Reduce the amount of sliding resistance
C. Can deal with movement of the suspension both vertically and in other directions
D. Improve the force transmission speed
Answer : C

6. Wheel base of a vehicle is the
A. Distance between the centres of the front and rear wheels
B. Distance between the centres of the front tyres
C. Distance between the centres of the rear tyres
D. Extreme length of the vehicle
Answer : A

7. The main merit of a multi cylinder type cylinder sleeve is
A. Smaller engine dimensions
B. Better cooling efficiency
C. High rigidity
D. None of these
Answer : A

8. The main function of the tread pattern on tyre is that
A. The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
B. The crests between the tread grooves absorb road noise
C. In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
D. The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
Answer : C

9. A basic difference between the spark ignition engine and the Diesel engine is that the
A. Diesel engine compresses air alone instead of an air-fuel mixture
B. Air temperature ignites the fuel in the Diesel engine
C. Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
D. All of the above
Answer : D

10. The service brakes employed in cars are generally operated
A. Mechanically
B. Hydraulically
C. Pneumatically
D. None of these
Answer : B

11. The commonly used antifreeze solution in automobiles is
A. Carbon disulphide
B. Ethylene glycol
C. Ammonium chloride
D. Freon-12
Answer : B

12. The function of an oil control orifice is that it
A. Returns cylinder head lubricating oil to the oil pan at high speed
B. Turns oil into fine mist for spray lubrication
C. Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
D. Removes impurities from cylinder head lubricating oil
Answer : C

13. The main function of a master cylinder is to
A. Adjust the extent of brake pedal free play
B. Boost the force applied to brake pedal
C. Convert brake pedal force into hydraulic pressure
D. Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Answer : C

14. The engine oil viscosity is defined by _________ ratings.
A. Automatic transmission fluid (ATF)
B. Society of automotive engineers (SAE)
C. Gross vehicle weight (GVW)
D. American petroleum institute (API)
Answer : B

15. The main feature of Macpherson strut suspension is that
A. The vertical size of the suspension can be made more compact
B. Non vertical external forces are supported by the suspension arms
C. The unsprung mass in lighter
D. The assembly is slightly more complicated in design
Answer : B

16. The coefficient of friction for the clutch facing is approximately
A. 0.1
B. 0.4
C. 0.8
D. 1.2
Answer : B

17. The most effective method of controlling S.I. engine exhaust emission is by
A. Recirculating exhaust
B. Using catalytic converter
C. Using some additives in the fuel
D. None of these
Answer : B

18. The stroke of an engine is the
A. Volume of the cylinder
B. Length of the connecting rod
C. Internal diameter of the cylinder
D. Distance between T.D.C. and B.D.C.
Answer : D

19. In Diesel engines, during suction stroke, ________ is drawn in the cylinder.
A. Air and fuel
B. Only fuel
C. Only air
D. None of these
Answer : C

20. The negative terminal post on the top of a battery is
A. Smaller than the positive terminal post
B. Larger than the positive terminal post
C. Of the same size as the positive terminal post
D. None of these
Answer : A

21. In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as
A. Release chamber
B. Balancer
C. Relief valve
D. Stop valve
Answer : C

22. The ignition in a spark ignition engine takes place when the piston is
A. Exactly at the T.D.C. position on its compression stroke
B. Approaching the T.D.C. position on its compression stroke
C. Leaving the T.D.C. position on its compression stroke
D. Approaching the T.D.C position on its exhaust stroke
Answer : B

23. The rolling resistance is because of the friction between the
A. Wheel rim and tyre
B. Tyre and the road surface
C. Wheel rim and road surface
D. None of these
Answer : B

24. If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
A. 175
B. 65
C. 14
D. 82
Answer : B

25. The seat belt tensioners are built in the
A. Front seats
B. Shoulder anchors
C. Seat belt retractors
D. Seat belt buckles
Answer : C

26. The oil pump is driven by the
A. Camshaft
B. Alternator shaft
C. Crankshaft via drive belt
D. Crankshaft directly
Answer : D

27. The device for smoothening out the power impulses from the engine is called
A. Clutch
B. Differential
C. Flywheel
D. Torque converter
Answer : C

28. The brake pedal during ABS operation
A. Is pushed upward forcefully
B. Pedal stroke becomes longer
C. Transmits slight kickback to the driver's foot
D. All of the above
Answer : C

29. Tachometer in a vehicle measures
A. Speed
B. Distance
C. Engine r.p.m.
D. Fuel consumption
Answer : C

30. The main function of an exhaust muffler is the
A. Optimisation of exhaust efficiency
B. Reduction of exhaust noise
C. Reduction of nitrogen oxide in the exhaust gases
D. Reduction of the exhaust gas volume
Answer : B

31. The main characteristics of a maintenance free (MF) battery is that
A. A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
B. A maintenance free battery has a relatively short shelf life when compared with standard batteries
C. Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
D. Recharging of a maintenance free battery is neither required nor possible
Answer : C

32. Which of the following parameter can be adjusted by modifying the tie rod attachment length?
A. Camber
B. Caster
C. Toe
D. Steering gear ratio
Answer : C

33. If the valve clearances are excessively large, the problem that can arise is
A. Overheating of the engine
B. Incomplete valve closure
C. Fouling of spark plug by gasoline
D. None of these
Answer : B

34. The basic purpose of a four wheel drive (4WD) system is that it
A. Delivers improved cornering on dry road surfaces
B. Eliminates the need of snow tyres, tyre chains, etc.
C. Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
D. Ensures that effective braking can be performed, even on slippery surfaces
Answer : C

35. The size of engine cylinder is referred in terms of its
A. Diameter and bore
B. Displacement and efficiency
C. Bore and stroke
D. Bore and length
Answer : C

36. The two kinds of piston rings are
A. Compression and oil control rings
B. Compression and sliding seal rings
C. Oil scrapper and oil control rings
D. Pressure and sealing rings
Answer : A

37. The forced fed lubrication system means that the oil is delivered to the engine by
A. Gravity
B. The pressure created by the oil pump
C. Splashing action of the crankshaft
D. None of these
Answer : B

38. The engine oil is stored in __________ when the engine is not running.
A. Oil pan
B. Cylinder head
C. Oil pump
D. Separate oil tank
Answer : A

39. The capacity of a battery is usually expressed in terms of
A. Volts
B. Amperes
C. Weight
D. Ampere hours
Answer : D

40. The most commonly used power plant in automobiles is
A. Gas turbine
B. I.C. engine
C. Battery
D. None of these
Answer : B

41. The component that is responsible for converting the rotation of the steering wheel into lateral motion is the
A. Steering wheel
B. Steering shaft
C. Steering gearbox
D. Tie rod
Answer : C

42. The octane rating of petrol commercially available is
A. 85-95
B. 95-100
C. 100-110
D. 110-125
Answer : A

43. An overinflated tyre will wear the tread most near the
A. Edges
B. Corners
C. Centre
D. None of these
Answer : C

44. The torque available at the contact between driving wheels and road is known as
A. Brake effort
B. Tractive effort
C. Clutch effort
D. None of these
Answer : B

45. The basic part of the engine, to which the other engine parts are attached or assembled is the
A. Cylinder head
B. Crankshaft
C. Cylinder block
D. Oil pan
Answer : C

46. The difference between DOT 3 and DOT 4 brake fluids is
A. DOT 4 fluids have a higher boiling point than DOT 3 fluid
B. DOT 4 fluids have a lower boiling point than DOT 3 fluid
C. DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
D. DOT 4 fluid is more resistant to freezing than DOT 3 fluid
Answer : A

47. The Diesel engine works on
A. Otto cycle
B. Carnot cycle
C. Diesel cycle
D. Rankine cycle
Answer : C

48. The order in which effort applied to the steering wheel is transferred to the front wheel is
A. Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels
B. Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
C. Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels
D. Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
Answer : B

49. The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
A. Supercharging
B. Auto ignition
C. Scavenging
D. Detonation
Answer : A

50. The connecting rod is attached to the piston by the
A. Cap bolt
B. Piston pin
C. Cap roller bearing
D. Rod cap
Answer : B