Automobile Engineering Practice Set-1

Page 1 of 3

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

Air and fuel

Only fuel

None of these

Only air

2. The brake warning light warns the driver of

Failure of the primary or secondary circuit of hydraulic system

Air in the hydraulic system

Water in the master cylinder

Power brake failure

3. The most commonly used power plant in automobiles is

Gas turbine

None of these

Battery

I.C. engine

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

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

Increase the speed at which the valves move up and down

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

Make the crankshaft turn smoothly

5. The octane rating of petrol commercially available is

110-125

85-95

100-110

95-100

6. In a square type engine

Geometrical shape is square

Diameter and length of piston are same

Stroke length and cylinder bore are same

Two cylinders are placed horizontal and two vertical

7. 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

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

Increases the combustion temperature

Creates swirl

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

Maintains a seal and prevents the fuel leakage

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

16

4

12

8

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

Sector gear

Spline

Tie rod

Pivot

Page 2 of 3

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

Less than 40 kmph

Less than 60 kmph

More than 60 kmph

Less than 20 kmph

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

Weight

Volts

Amperes

Ampere hours

13. The negative plates of a lead acid battery has

Lead sulphate (PbSO₄)

Spongy lead (Pb)

Lead peroxide (PbO₂)

Sulphuric acid (H₂SO₄)

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

Detonation

Pre-ignition

Rumble

Ignition

15. The path taken by intake air is

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

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

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

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

16. The vehicle ride will be comfortable if

Sprang mass is kept minimum

All of these

Vehicle mass is kept minimum

Unsprung mass is kept minimum

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

Antilock braking system malfunctions

Brake fades

Vapour locking occurs in the brake lines

Brake drags

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

Anemometer

Hygrometer

Multimeter

Hydrometer

19. The calorific value of petrol is about

42.7-43.5 MJ/kg

36.5-38.5 MJ/kg

45.5-47 MJ/kg

39.4-42.5 MJ/kg

20. The painting of automobiles is done to

Retain the characteristics of steel for long

Improve its external appearance

All of these

Prevent rust from growing on the body

Page 3 of 3

21. 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 the vibrations transferred from the surface of the road

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

22. The main feature of Macpherson strut suspension is that

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

The unsprung mass in lighter

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

2R

4R²

R

4R

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

Ignition quality

Delay period

Volatility

Viscosity

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

L

H

C

I

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

Society of automotive engineers (SAE)

Automatic transmission fluid (ATF)

American petroleum institute (API)

Gross vehicle weight (GVW)

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

0.4

0.1

1.2

0.8

28. The stroke of an engine is the

Internal diameter of the cylinder

Volume of the cylinder

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

Length of the connecting rod

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

Cooling efficiency

Lubrication performance

None of these

Resistance to wear

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

Incomplete combustion

Low temperature combustion

High temperature combustion

High atmospheric temperature combustion

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