Automobile Engineering MCQ Solved Paper for IBPS RRB

1. 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

2. In a square type engine
A. Geometrical shape is square
B. Diameter and length of piston are same
C. Two cylinders are placed horizontal and two vertical
D. Stroke length and cylinder bore are same
Answer : D

3. The main function of a resonator is that it
A. Regulates the intake air flow rate
B. Reduces the intake air noise
C. Enhances intake efficiency
D. Regulates the intake air temperature
Answer : B

4. The connecting rods are generally made of ________ shaped crosssection.
A. I
B. C
C. L
D. H
Answer : A

5. 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

6. 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

7. The cam shaft in an engine is always mounted
A. Parallel to the crankshaft
B. Perpendicular to the crankshaft
C. Inclined to the crankshaft
D. None of these
Answer : A

8. 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

9. In a Diesel engine, the function of a fuel injector is to
A. Mix the fuel and air
B. Ignite the air-fuel mixture
C. Provide flame front for ignition
D. Spray atomized fuel in the cylinder
Answer : D

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

11. Thinner is added to the paint in order to
A. Make pigments and resin mix easily
B. Make paint film hard
C. Optimise its viscosity
D. None of these
Answer : C

12. In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
A. 1
B. 2
C. 3
D. 4
Answer : B

13. The calorific value of Diesel is about
A. 36.5 MJ/kg
B. 38.5 MJ/kg
C. 42.5 MJ/kg
D. 45.5 MJ/kg
Answer : C

14. The formula for Isooctane is
A. C8H18
B. C7H17
C. C6H18
D. C7H18
Answer : A

15. During suction stroke, the inside pressure of cylinder is
A. More than the atmospheric pressure
B. Less than the atmospheric pressure
C. Equal to the atmospheric pressure
D. None of these
Answer : B

16. Two general types of tyres are
A. Tube type and tubeless
B. Solid and tubeless
C. Air and pneumatic
D. Split rim and drop centre
Answer : A

17. 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

18. The component that connects the steering rack to the knuckles is
A. Tie rod
B. Sector gear
C. Pivot
D. Spline
Answer : A

19. The valve overlap in four stroke petrol engines is approximately
A. 30°
B. 60°
C. 90°
D. 120°
Answer : A

20. 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

21. The heat transfer from coolant to air in the radiator of an automobile engine takes place by
A. Radiation only
B. Convention only
C. Convection and radiation
D. Conduction, convection and radiation
Answer : C

22. The function of an alternator in an automobile is to
A. Supply electric power
B. Converts mechanical energy into electrical energy
C. Continually recharges the battery
D. Partly converts engine power into electric power
Answer : C

23. The positive plates of a lead acid battery has
A. Lead peroxide (PbO?)
B. Spongy lead (Pb)
C. Lead sulphate (PbSO?)
D. Sulphuric acid (H?SO?)
Answer : A

24. The gear shift lever requires two separate motions to shift gears, and the first movement
A. Moves the synchronizer
B. Selects the synchronizer
C. Meshes the gears
D. Operates the clutch
Answer : B

25. The starting system includes
A. A battery, a starter, and an ignition switch
B. A battery, a distributor, and an ignition switch
C. A battery, a starter, and a distributor
D. A distributor, a starter, and an ignition switch
Answer : A

26. The discharged lead acid battery has on its plates
A. Lead peroxide (PbO?)
B. Spongy lead (Pb)
C. Lead sulphate (PbSO?)
D. Sulphuric acid (H?SO?)
Answer : C

27. Which of the following is not an automobile?
A. Motor cycle
B. Passenger car
C. Aeroplane
D. Truck
Answer : C

28. The connecting rod lower end is connected to the relevant ________ of crankshaft.
A. Big end
B. Crank arm
C. Journal
D. Small end
Answer : C

29. The condition that causes vapour locking in a brake system is
A. Overheating of the fluid due to frequent brake application
B. Overcooling of the brakes during high speed driving
C. Keeping the vehicle without use for an extended period
D. An excessively high engine speed on a downhill road
Answer : A

30. The most commonly used supplementary restraint system (SRS) component is
A. Seat belt
B. Brake
C. Airbag
D. Steering
Answer : C

31. 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

32. The air gap between the central electrode and ground (or side) electrode of a spark plug is around
A. 0.2 mm
B. 0.5 mm
C. 1 mm
D. 1.5 mm
Answer : C

33. Which of the following oil is more viscous?
A. SAE 30
B. SAE 40
C. SAE 70
D. SAE 80
Answer : D

34. 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

35. A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it
A. Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
B. Allows the steering wheel to be turned by a greater amount when steering
C. Makes the steering more responsive
D. Reduces the amount of kickback for large steering angles
Answer : A

36. When the top of the wheel is tilted outward, then it is called
A. Positive camber
B. Negative camber
C. Positive caster
D. Negative caster
Answer : A

37. 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

38. When a gear box has four forward speeds and one reverse speed, it is said to be a
A. 3-speed gear box
B. 4-speed gear box
C. 5-speed gear box
D. 6-speed gear box
Answer : B

39. If the engine coolant leaks into the engine oil, then engine oil
A. Appears milky
B. Become foamy
C. Turns black
D. None of these
Answer : A

40. In aluminium cylinder blocks, the cylinder liners are made of
A. Aluminium
B. Ceramic
C. Brass
D. Cast iron
Answer : D

41. Two speed reverse gear arrangements is generally provided in case of
A. Passenger cars
B. Matadors
C. Tractors
D. Trucks
Answer : C

42. The specific gravity of petrol is about
A. 0.75
B. 0.85
C. 0.95
D. 1.25
Answer : A

43. 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

44. Which of the following bulb in a car will have the least wattage?
A. Head light bulb
B. Stop light bulb
C. Parking light bulb
D. Ignition warning bulb
Answer : D

45. 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

46. 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

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

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 rating of C.I. engine fuel (Diesel) is given by
A. Octane number
B. Performance number
C. Cetane number
D. None of these
Answer : C

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