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4

The ease with which petrol vaporizes is called its

A. Oxidation

B. Octane number

C. Volatility

D. Cetane number

Correct Answer :

C. Volatility


Related Questions

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4

An engine has a clearance volume of 100 cm³ and a swept volume of 800 cm³. The compression ratio is

A. 7 : 1

B. 8 : 1

C. 9 : 1

D. 10 : 1

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4

The service brakes employed in cars are generally operated

A. Mechanically

B. Hydraulically

C. Pneumatically

D. None of these

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4

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

A. Trapping

B. Tapping

C. Bleeding

D. Cleaning

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4

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

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4

The temperature indicating instrument in vehicles indicates the temperature of

A. Engine piston

B. Engine cylinder

C. Lubricating oil

D. Jacket cooling water

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4

The lubrication oil flow in an engine is in the order as

A. Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan

B. Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan

C. Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan

D. Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan

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4

The basic purpose of a four wheel drive (4WD) system is that it

A. Delivers improved cornering on dry road surfaces

B. Eliminates the need of snow tyres, tyre chains, etc.

C. Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces

D. Ensures that effective braking can be performed, even on slippery surfaces

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4

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

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4

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

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4

The positive plates of a lead acid battery has

A. Lead peroxide (PbO₂)

B. Spongy lead (Pb)

C. Lead sulphate (PbSO₄)

D. Sulphuric acid (H₂SO₄)

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4

The parking brake generally acts on

A. Front wheels

B. Rear wheels

C. Front and rear wheels

D. Propeller shaft

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4

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

A. 1

B. 2

C. 3

D. 4

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4

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

A. Octane number

B. Performance number

C. Cetane number

D. None of these

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4

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

A. 12

B. 4

C. 16

D. 8

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4

The rigid suspension is beneficial when

A. It is desired to reduce the unsprung mass

B. It is desired to have more flexibility in design

C. It is desired to improve tyre to ground contact characteristics

D. Large changes in load make it necessary to have a large suspension stroke

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4

The boiling point of Diesel fuel is in the range of

A. 70°C to 100°C

B. 100°C to 120°C

C. 120°C to 180°C

D. 180°C to 360 °C

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4

The problems caused by the wheel imbalance are

A. Hard steering and hard ride

B. Poor acceleration and hard steering

C. Steering wheel vibrations and uneven tyre wear

D. Poor acceleration and reduced fuel efficiency

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4

The firing order for an inline four cylinder I.C. engine is

A. 1-2-3-4

B. 1-3-4-2

C. 1-2-4-3

D. 1-3-2-4

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4

The maximum torque multiplication ratio in a torque converter is about

A. 2.5

B. 10

C. 25

D. 40

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4

Vulcanizing means

A. Heating rubber under pressure

B. Spraying with special paint

C. Melting rubber while stirring it

D. None of these

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4

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

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4

Two speed reverse gear arrangements is generally provided in case of

A. Passenger cars

B. Matadors

C. Tractors

D. Trucks

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4

The main task of a battery in automobiles is to

A. Supply electricity to the alternator

B. Act as a reservoir or stabilizer of electricity

C. Supply electricity to the vehicle's electrical system at all times while the engine is running

D. Supply a large amount of power to turn the starter motor when the engine is being started

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4

Bead wires are made of

A. Steel

B. Copper

C. Zinc

D. Aluminium

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4

The sequence order of events in a four stroke engine is

A. Suction exhaust power compression

B. Suction power compression exhaust

C. Suction compression power exhaust

D. Exhaust compression power suction

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4

The connecting rod connects the piston and the

A. Cylinder head

B. Cylinder block

C. Camshaft

D. Crankshaft

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4

A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

A. Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

B. Allows the steering wheel to be turned by a greater amount when steering

C. Makes the steering more responsive

D. Reduces the amount of kickback for large steering angles

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4

The component that connects the steering rack to the knuckles is

A. Tie rod

B. Sector gear

C. Pivot

D. Spline

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4

The basic part of the engine, to which the other engine parts are attached or assembled is the

A. Cylinder head

B. Crankshaft

C. Cylinder block

D. Oil pan

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4

The painting of automobiles is done to

A. Prevent rust from growing on the body

B. Improve its external appearance

C. Retain the characteristics of steel for long

D. All of these