Automobile Engineering 1000+ MCQ with answer for SSC Stenographer

1. 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

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

3. 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

4. In radial tyres
A. One ply layer runs diagonally one way and another layer runs diagonally the other way
B. All plies run parallel to one another and vertical to tyre bead
C. Inner tubes are always used
D. None of these
Answer : B

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

6. 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

7. 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

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

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

10. 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

11. 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

12. 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

13. The compression ratio for Diesel engines usually lies in the range of
A. 6-10
B. 10-1
C. 15-25
D. 25-40
Answer : C

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

15. 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

16. 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

17. The timing belt is attached to the camshaft pulley and
A. Timing belt drive pulley
B. Distributor
C. Radiator fan pulley
D. Alternator pulley
Answer : A

18. 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

19. In vehicles with tilt steering, the steering column is pivoted in
A. Upper bracket
B. Lower bracket
C. Tilt bracket
D. Steering yoke joint
Answer : B

20. Odometer is an instrument used for measurement of
A. Power
B. Fuel consumption
C. Engine r.p.m.
D. Distance
Answer : D

21. In automobiles G.V.W. refers to
A. Gross vehicle width
B. Gross vehicle weight
C. Gross vehicle wheel base
D. Gross vehicle wheel track
Answer : B

22. Two advantages of using helical gears rather than spur gears in a transmission system are
A. Strength and cost
B. Strength and less end thrust
C. Noise level and strength
D. Noise level and economy
Answer : C

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

24. 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

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

26. In order to implement gear changes in the gear unit of an automatic transmission, a ________ is used.
A. Synchronizer
B. Planetary gear
C. Magnetic clutch
D. Hydraulic multi plate clutch
Answer : D

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

28. 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

29. The cetane number of a Diesel fuel is a measure of
A. Volatility
B. Viscosity
C. Ignition quality
D. Delay period
Answer : D

30. The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as
A. Honing
B. Porous plating
C. Boring
D. Shot peening
Answer : A

31. In a single dry plate clutch, torsional vibrations are absorbed by
A. Coil springs known as torsional springs
B. Cushion springs
C. Central hub
D. Clutch pedal
Answer : A

32. 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

33. The function of antilock brake system (ABS) is that is
A. Reduces the stopping distance
B. Minimises the brake fade
C. Maintains directional control during braking by preventing the wheels from locking
D. Prevents nose dives during braking and thereby postpones locking of the wheels
Answer : C

34. The compression ratio of a petrol engine is nearly
A. 4 : 1
B. 8 : 1
C. 15 : 1
D. 20 : 1
Answer : B

35. The component of the oil filter that prevents the passage of metal particles and sludge is
A. Element
B. Relief valve
C. Check valve
D. Case
Answer : A

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

37. The advantage of having a tandem master cylinder arrangement in automobiles is that it
A. Enhances safety by serving two independent lines in a divided line brake circuit
B. Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
C. Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side
D. Boosts the brake fluid pressure to reduce the force required to depress the brake pedal
Answer : A

38. The function of a connecting rod is
A. To turn the flywheel
B. To drive the drive plate
C. To drive the fuel pump
D. To transmit motion of the piston to the crankshaft
Answer : D

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. 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

41. The clutch is located between the transmission and the
A. Engine
B. Rear axle
C. Propeller shaft
D. Differential
Answer : A

42. 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

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

44. The correct way to rectify an imbalanced wheel is to
A. Adjust the tyre pressure
B. Rotate the tyres
C. Adjust the damper spring tension
D. Attach appropriate weights to the wheel at appropriate positions
Answer : D

45. 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

46. 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

47. 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

48. Which of the following indicates multigrade oil?
A. SAE 30
B. API SF
C. SAE 20 W50
D. API 50
Answer : C

49. 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

50. In a Diesel engine, the fuel is ignited by
A. An electric spark
B. The heat of compression
C. The hot exhaust
D. None of these
Answer : B