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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 main cause for the change in engine oil viscosity is

Temperature

Humidity

Vibration

Contamination

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

An electric spark

The hot exhaust

None of these

The heat of compression

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

Insufficient air during combustion

Insufficient fuel during combustion

High temperature combustion

Low temperature combustion

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

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

Maintains directional control during braking by preventing the wheels from locking

Reduces the stopping distance

Minimizes the brake fade

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

1

4

3

2

6. A maintenance free battery

Has lead-antimony plate grid

Does not contain acid

Has lead-calcium plate grid

Does not contain water

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

Bleeding

Cleaning

Trapping

Tapping

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

Suction exhaust power compression

Suction power compression exhaust

Exhaust compression power suction

Suction compression power exhaust

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

Front axle

Steering system

Seats

Wheels

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

Performance number

Cetane number

None of these

Octane number

Page 2 of 3

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

Taper roller bearing

Ball bearings

Needle roller bearing

Plain bearings

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

Cylinder head

Oil pan

Separate oil tank

Oil pump

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

Piston walls

Piston rings

Skirt of the piston

Crown of the piston

14. 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

114.3 N

1143 N

11.43 N

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

(a) Both valves are closed

(d) None of these

(b) Both valves are open

(c) Both 'A' and 'B'

16. The Diesel engines as compared to petrol engines require

No flywheel

Same size of flywheel

Smaller flywheel

Bigger flywheel

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

Steering wheel

Steering shaft

Tie rod

Steering gearbox

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

4

2

3

1

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

The internal gear is fixed to the planetary gear.

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

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

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

20. The crankcase dilution means

Dilution of fuel in the crankcase

Dilution of lubrication oil by fuel in the crankcase

Dilution of mixture passing through crankcase in two stroke engines

Dilution of oil by water in the crankcase

Page 3 of 3

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

An excessively high engine speed on a downhill road

Overheating of the fluid due to frequent brake application

Keeping the vehicle without use for an extended period

Overcooling of the brakes during high speed driving

22. The oil pump is driven by the

Crankshaft directly

Alternator shaft

Crankshaft via drive belt

Camshaft

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

4000 rpm

2000 rpm

500 rpm

1000 rpm

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VideRime

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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