Automobile Engineering 1000+ MCQ with answer for CEED

1. Which of the following is not a part of the chassis?
A. Wheels
B. Front axle
C. Steering system
D. Seats
Answer : D

2. The function of a proportioning control valve (PCV) in a brake system is to
A. Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
B. Reduce the brake fluid pressure when the brakes approach their lockup point
C. Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level
D. Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level.
Answer : D

3. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
A. Indicator diagram
B. Axial force diagram
C. Valve timing diagram
D. None of these
Answer : C

4. The negative 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 : B

5. The temperature at which tyre inflation pressure should be checked is
A. 20°C
B. 25°C
C. 35°C
D. Ambient temperature
Answer : D

6. Highest useful compression ratio (HUCR) is the highest compression ratio at which the
A. Engine can run
B. Engine gives maximum output
C. Engine is most efficient
D. Fuel can be used in a test engine without knocking
Answer : D

7. 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

8. The parking brakes employed in vehicles are operated
A. Mechanically
B. Hydraulically
C. Pneumatically
D. None of these
Answer : A

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

10. A front stabilizer bar is used to
A. Increase vehicle load carrying capacity
B. Provide a softer ride
C. Control suspension movement and body roll
D. All of the above
Answer : C

11. The crescent shaped cavity on the piston head top surface is called as
A. Piston oil hole
B. Snap ring
C. Valve recess
D. Valve clearance
Answer : C

12. 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

13. 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

14. 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

15. The purpose of a balancer shaft is to
A. Balance the timing in the movement of the two groups of pistons
B. Increase inertia force of the rotating crankshaft
C. Reduce vibrations caused by the crankshaft rotation
D. Adjusts the timing of the intake and exhaust valve openings
Answer : C

16. 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

17. 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

18. When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate
A. Brake power
B. Compression ratio
C. Specific air consumption
D. Mean effective pressure
Answer : A

19. An oil filter bypass valve opens when the
A. Engine is cold
B. Engine overheats
C. Oil filter becomes clogged
D. Engine runs at high speed
Answer : C

20. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
A. Too lean mixture
B. Stoichiometric mixture
C. Most economical mixture
D. Too rich mixture
Answer : D

21. The main function of intake manifold is that it
A. Promotes the mixture of air and fuel
B. Reduces intake noise
C. Cools the intake air to a suitable temperature
D. Distributes intake air equally to the cylinders
Answer : D

22. 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

23. 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

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

25. The main purpose of an engine's air cleaner is that it
A. Controls the engine's air intake volume
B. Reduces the engine's air intake noise
C. Prevents rain water from entering the engine
D. Prevents dust and other foreign matter from entering the engine
Answer : D

26. 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

27. 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

28. The basic purpose of providing caster angle on wheels is to
A. Prevent uneven tyre wear
B. Maintain directional control
C. Bring the road contact of the tyre under the point of load
D. Compensate for wear in the steering linkage
Answer : B

29. 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

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

31. The caster is called positive when the top of the king pin is inclined to the
A. Rear of the vehicle
B. Front of the vehicle
C. Left of the vehicle
D. Right of the vehicle
Answer : A

32. 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

33. The crankshaft of a typical inline four cylinder engine has ________ balance weights.
A. 12
B. 4
C. 16
D. 8
Answer : D

34. The Diesel engines are also known as
A. Spark ignition (S.I.) engines
B. Compression ignition (C.I.) engines
C. Steam engines
D. None of these
Answer : B

35. The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is
A. 1.143 N
B. 11.43 N
C. 114.3 N
D. 1143 N
Answer : D

36. 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

37. Damper is also known as
A. Shock absorber
B. Torsion bar
C. Spring
D. Radius rod
Answer : A

38. The temperature indicating instrument in vehicles indicates the temperature of
A. Engine piston
B. Engine cylinder
C. Lubricating oil
D. Jacket cooling water
Answer : D

39. 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

40. The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of
A. Section width to section height
B. Section height to section width
C. Wheel diameter to section height
D. Wheel diameter to section width
Answer : B

41. 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

42. During braking, the brake shoe is moved outward to force the lining against the
A. Wheel piston or cylinder
B. Anchor pin
C. Brake drum
D. Wheel rim or axle
Answer : C

43. The three basic cylinder arrangements for automotive engines are
A. Flat, radial, and V
B. In a row, in line, and opposed
C. In line, V, and opposed
D. V, double row, and opposed
Answer : C

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

45. 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

46. 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

47. The crankcase dilution means
A. Dilution of fuel in the crankcase
B. Dilution of oil by water in the crankcase
C. Dilution of lubrication oil by fuel in the crankcase
D. Dilution of mixture passing through crankcase in two stroke engines
Answer : C

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

49. 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

50. 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