Automobile Engineering Practice Set-1

Page 1 of 3

1. The crankshaft of a typical inline four cylinder engine has ________ balance weights.

12

16

4

8

2. The brake warning light warns the driver of

Water in the master cylinder

Power brake failure

Air in the hydraulic system

Failure of the primary or secondary circuit of hydraulic system

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

High temperature combustion

Incomplete combustion

High atmospheric temperature combustion

Low temperature combustion

4. The auto ignition in a spark ignition engine means

Ignition of the charge before the passage of flame front

Ignition induced by the passage of a spark

Automatic ignition of the charge at the end of compression

Ignition induced to supplement the process of normal combustion

5. The function of a first compression ring (top ring) is that it

Maintains a seal and prevents the fuel leakage

Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber

Creates swirl

Increases the combustion temperature

6. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

Lubrication performance

None of these

Cooling efficiency

Resistance to wear

7. When the brake pedal free play is less than the specified value, then the

Brake fades

Antilock braking system malfunctions

Brake drags

Vapour locking occurs in the brake lines

8. The most commonly used power plant in automobiles is

None of these

I.C. engine

Battery

Gas turbine

9. The octane rating of petrol commercially available is

95-100

110-125

100-110

85-95

10. The component that connects the steering rack to the knuckles is

Pivot

Sector gear

Spline

Tie rod

Page 2 of 3

11. The negative plates of a lead acid battery has

Lead sulphate (PbSO₄)

Spongy lead (Pb)

Sulphuric acid (H₂SO₄)

Lead peroxide (PbO₂)

12. The engine oil viscosity is defined by ___________ ratings.

Society of automotive engineers (SAE)

Automatic transmission fluid (ATF)

Gross vehicle weight (GVW)

American petroleum institute (API)

13. The stroke of an engine is the

Volume of the cylinder

Length of the connecting rod

Distance between T.D.C. and B.D.C.

Internal diameter of the cylinder

14. The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints

Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.

None of the above

Absorb any difference in speed between the left and right wheels when the vehicle is turning

Absorb the vibrations transferred from the surface of the road

15. If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called

Rumble

Detonation

Pre-ignition

Ignition

16. In a square type engine

Diameter and length of piston are same

Stroke length and cylinder bore are same

Geometrical shape is square

Two cylinders are placed horizontal and two vertical

17. The coefficient of friction for the clutch facing is approximately

0.4

0.1

1.2

0.8

18. The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be

4R

R

2R

4R²

19. The main feature of Macpherson strut suspension is that

The unsprung mass in lighter

The assembly is slightly more complicated in design

Non vertical external forces are supported by the suspension arms

The vertical size of the suspension can be made more compact

20. The connecting rods are generally made of __________ shaped cross-section.

I

L

C

H

Page 3 of 3

21. The painting of automobiles is done to

All of these

Improve its external appearance

Prevent rust from growing on the body

Retain the characteristics of steel for long

22. The instrument used to check specific gravity of acid in a battery is

Hygrometer

Multimeter

Hydrometer

Anemometer

23. The cetane number of a Diesel fuel is a measure of

Viscosity

Volatility

Ignition quality

Delay period

24. The calorific value of petrol is about

45.5-47 MJ/kg

36.5-38.5 MJ/kg

39.4-42.5 MJ/kg

42.7-43.5 MJ/kg

25. The vehicle ride will be comfortable if

All of these

Vehicle mass is kept minimum

Sprang mass is kept minimum

Unsprung mass is kept minimum

26. In petrol engines, during suction stroke, _________ is drawn in the cylinder

Air and fuel

Only fuel

Only air

None of these

27. It is necessary to maintain the valve clearances as they

Allow for lengthening of the valves owing to the heat of combustion

Make the crankshaft turn smoothly

Reduce the resistance to sliding that occurs between the cam and the tappet

Increase the speed at which the valves move up and down

28. The capacity of a battery is usually expressed in terms of

Volts

Weight

Amperes

Ampere hours

29. The braking control type traction control system (TCS) generally operates in the speed range of

Less than 40 kmph

Less than 20 kmph

Less than 60 kmph

More than 60 kmph

30. The path taken by intake air is

Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders

Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders

Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders

Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders

Automobile Engineering Practice Set-1

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Automobile Engineering Practice Set-1

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection