Automobile Engineering MCQ Solved Paper for IIFT

1. The basic function of the suspension is to
A. Absorbs vibration and impact forces from the road surface
B. Ensure that the steering wheel can deliver a suitable amount of steering force
C. Ensure that wheel alignment is not disturbed during driving
D. Automatically correct the effects of over steering
Answer : A

2. The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)
A. P.L.A.N/2
B. P.L.A.N
C. 2 × P.L.A.N
D. P.L.A.N/4
Answer : A

3. The firing order for an inline four cylinder I.C. engine is
A. 1-2-3-4
B. 1-3-4-2
C. 1-2-4-3
D. 1-3-2-4
Answer : B

4. The parking brake generally acts on
A. Front wheels
B. Rear wheels
C. Front and rear wheels
D. Propeller shaft
Answer : B

5. The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
A. Camber
B. Caster
C. Toe in
D. Toe out
Answer : A

6. The purpose of a cylinder head gasket is to
A. Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
B. Prevent engine oil from going into combustion chamber
C. Removes impurities from cylinder head lubricating oil
D. None of the above
Answer : A

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

8. Incorrect steering axis inclination (S.A.I.) causes
A. Tendency to assume toe-out orientation
B. Generation of a braking effect at tight corners
C. Poor recovery of the steering wheel after making a turn
D. The vehicle to pull to the side of lesser inclination
Answer : C

9. In which of the following conditions, the idle CO percentage should be measured with the vehicle?
A. Headlights and other electrical devices are switched off
B. Headlights and other electrical devices are switched on
C. Headlights and other lights are switched off
D. Headlights are switched on
Answer : A

10. In comparison with a radial tyre, one advantage of a bias ply tyre is
A. Longer life
B. Lower rolling resistance
C. Smoother ride at low speeds
D. None of these
Answer : C

11. The most accurate ignition system of a spark ignition engine is
A. Magneto system
B. Battery system
C. Electronic control unit system
D. Magneto and electronic system
Answer : C

12. 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

13. The painting of automobiles is done to
A. Prevent rust from growing on the body
B. Improve its external appearance
C. Retain the characteristics of steel for long
D. All of these
Answer : D

14. The information provided by the oxygen (O?) sensor to the feedback control system is about the
A. Air-fuel ratio
B. Air temperature
C. Air flow speed
D. Exhaust gas volume
Answer : A

15. In a ventilated disc brake
A. A duct directs air towards the caliper for cooling while the vehicle is moving
B. Caliper is covered with cooling fins
C. Disc contains many small holes for optimum cooling performance
D. Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Answer : D

16. The function of a radiator fan in the cooling system is that
A. It blows air through the radiator when necessary
B. It is turned by wind force as the vehicle moves forward, and its rotation drives the water pump
C. It cools the engine by blowing air onto the cylinder block
D. It draws heat out of the engine compartment
Answer : A

17. The combustion process in a Diesel engine is a
A. Constant volume process
B. Constant pressure process
C. Constant temperature process
D. Adiabatic process
Answer : B

18. The valve tappet clearance is measured by
A. Screw pitch gauge
B. Engineering scale
C. Feeler gauge
D. Vernier caliper
Answer : C

19. The major purpose of an electronically controlled automatic transmission is that this type of transmission
A. Eliminates gear clutches
B. Eliminates the gear shaft lever
C. Reduces the number of automatic transmission components
D. Reduces shift shock and achieves more efficient transmission of engine torque
Answer : D

20. The basic purpose of tyres is to
A. Grip the road and provide good traction
B. Substitute for springs
C. Act as brake
D. None of these
Answer : A

21. An imbalance wheel during vehicle operation
A. Makes large noise when its heavy point hits the road surface
B. Deflects in the vehicle's longitudinal direction
C. Bounces vertically or deflects from side to side (as seen from front or rear)
D. Creates a standing wave
Answer : C

22. The braking control type traction control system (TCS) generally operates in the speed range of
A. Less than 20 kmph
B. Less than 40 kmph
C. Less than 60 kmph
D. More than 60 kmph
Answer : B

23. The component in the radiator of an automobile that increases the boiling point of water is
A. Drain plug
B. Water jacket
C. Vacuum valve
D. Pressure cap
Answer : D

24. A petrol engine of a car develops 125 Nm torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is
A. 8.091 Nm
B. 80.91 Nm
C. 809.1 Nm
D. 8091 Nm
Answer : C

25. In an engine, the temperature of the piston will be more at the
A. Crown of the piston
B. Skirt of the piston
C. Piston walls
D. Piston rings
Answer : A

26. The maximum torque multiplication ratio in a torque converter is about
A. 2.5
B. 10
C. 25
D. 40
Answer : A

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

28. The number of exhaust manifolds in a V6 engine is
A. One
B. Two
C. Four
D. Eight
Answer : B

29. The tyre rotation is generally done at
A. 1000 km
B. 4000 km
C. 6000 km
D. 10000 km
Answer : D

30. The lubrication oil flow in an engine is in the order as
A. Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
B. Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
C. Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
D. Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
Answer : A

31. 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

32. Which of the following symptom is caused as a result of brake disc run out?
A. Ineffectiveness of the brakes
B. Judder during braking
C. Localized wearing of the brake pads
D. Rapid wearing of the brake pads
Answer : B

33. 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

34. The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to
A. Enable the pump's fault diagnosis function to operate
B. Warm up and lubricate the pump
C. Supplies a large amount of fuel and thereby creates a choke effect
D. Pressurise the fuel system before the engine is started
Answer : D

35. If the air-fuel mixture in a spark ignition engine is too rich, then airfuel ratio is about
A. 17 : 1
B. 15 : 1
C. 13 : 1
D. 10 : 1
Answer : D

36. Which one of the following statements correctly describes the construction of a planetary gear type differential?
A. The six planetary pinions rotate in constant mesh with the internal gears.
B. One drive shaft is splined to the central gear and the other to the planetary gear.
C. Each planetary pinion gear meshes with both the central gear and the internal gear.
D. The internal gear is fixed to the planetary gear.
Answer : B

37. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is
A. Cooling efficiency
B. Resistance to wear
C. Lubrication performance
D. None of these
Answer : C

38. When turning a corner
A. The front wheels are toeing out
B. The front wheels are turning on different angles
C. The inside front wheels has a greater angle than the outside wheel
D. All of the above
Answer : D

39. 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

40. 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

41. The basic characteristics of a brake fluid is
A. A high boiling point
B. Low viscosity
C. Compatibility with rubber and metal parts
D. All of these
Answer : D

42. The condition that results in large quantities of CO emission is
A. Insufficient air during combustion
B. Insufficient fuel during combustion
C. Low temperature combustion
D. High temperature combustion
Answer : A

43. 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

44. The motion of the cam is transferred to the valves through
A. Pistons
B. Rocker arms
C. Camshaft pulley
D. Valve stems
Answer : B

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

46. In bias ply tyres
A. All plies run parallel to one another
B. Belts of steel mesh are used in the tyres
C. One ply layer runs diagonally one way and another layer runs diagonally the other way
D. All of the above
Answer : C

47. The instrument used to check specific gravity of acid in a battery is
A. Hydrometer
B. Hygrometer
C. Anemometer
D. Multimeter
Answer : A

48. The compression ratio in petrol engine is kept less than in Diesel engine because
A. It makes petrol engines lighter
B. Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
C. Less compression ratio gives better performance
D. It is just customary to have less compression ratio in petrol engines
Answer : B

49. The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is
A. Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
B. Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
C. Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
D. Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
Answer : B

50. The operation of removing trapped air from the hydraulic braking system is known as
A. Trapping
B. Tapping
C. Bleeding
D. Cleaning
Answer : C