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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-8

September 5, 2021

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Page 1 of 3

1. The rating of C.I. engine fuel (Diesel) is given by

Octane number

Cetane number

None of these

Performance number

2. The main cause for the change in engine oil viscosity is

Contamination

Vibration

Temperature

Humidity

3. A maintenance free battery

Does not contain water

Has lead-antimony plate grid

Does not contain acid

Has lead-calcium plate grid

4. In a Diesel engine, the fuel is ignited by

The heat of compression

The hot exhaust

None of these

An electric spark

5. The crankcase dilution means

Dilution of mixture passing through crankcase in two stroke engines

Dilution of lubrication oil by fuel in the crankcase

Dilution of fuel in the crankcase

Dilution of oil by water in the crankcase

6. What type of bearing is used for main bearings and connecting rod bearings?

Ball bearings

Taper roller bearing

Needle roller bearing

Plain bearings

7. The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is

1.143 N

11.43 N

1143 N

114.3 N

8. Valve overlap is the number of degrees of camshaft rotation during which

(d) None of these

(a) Both valves are closed

(b) Both valves are open

(c) Both 'A' and 'B'

9. Which one of the following statements correctly describes the construction of a planetary gear type differential?

Each planetary pinion gear meshes with both the central gear and the internal gear.

The six planetary pinions rotate in constant mesh with the internal gears.

One drive shaft is splined to the central gear and the other to the planetary gear.

The internal gear is fixed to the planetary gear.

10. The engine oil is stored in _________ when the engine is not running.

Cylinder head

Oil pump

Oil pan

Separate oil tank

Page 2 of 3

11. The Diesel engines as compared to petrol engines require

Bigger flywheel

No flywheel

Same size of flywheel

Smaller flywheel

12. The oil pump is driven by the

Camshaft

Alternator shaft

Crankshaft via drive belt

Crankshaft directly

13. The camshaft of a four stroke Diesel engine running at 1000 rpm will run at

500 rpm

4000 rpm

1000 rpm

2000 rpm

14. The condition that results in large quantities of CO emission is

Low temperature combustion

Insufficient fuel during combustion

High temperature combustion

Insufficient air during combustion

15. The component that is responsible for converting the rotation of the steering wheel into lateral motion is the

Steering gearbox

Steering shaft

Steering wheel

Tie rod

16. The condition that causes vapour locking in a brake system is

Overcooling of the brakes during high speed driving

Overheating of the fluid due to frequent brake application

An excessively high engine speed on a downhill road

Keeping the vehicle without use for an extended period

17. In an engine, the temperature of the piston will be more at the

Crown of the piston

Piston walls

Skirt of the piston

Piston rings

18. In a four wheel drive (4WD), the numbers of gear boxes are

1

4

3

2

19. Which of the following is not a part of the chassis?

Seats

Steering system

Front axle

Wheels

20. The function of anti-lock brake system (ABS) is that is

Maintains directional control during braking by preventing the wheels from locking

Prevents nose dives during braking and thereby postpones locking of the wheels

Minimizes the brake fade

Reduces the stopping distance

Page 3 of 3

21. The sequence order of events in a four stroke engine is

Suction exhaust power compression

Suction compression power exhaust

Exhaust compression power suction

Suction power compression exhaust

22. In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is

1

4

3

2

23. The operation of removing trapped air from the hydraulic braking system is known as

Trapping

Tapping

Bleeding

Cleaning

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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