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Current Affairs January 2024

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4

A heat treated glass generally used in automobiles bursts into ________ upon cracking,

A. Sharp edged fragments

B. Small particles

C. Large particles

D. None of these

Correct Answer :

B. Small particles


Related Questions

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The natural gas is compressed in a CNG cylinder at a pressure of

A. 200 bar

B. 220 bar

C. 250 bar

D. 300 bar

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4

The valve tappet clearance is measured by

A. Screw pitch gauge

B. Engineering scale

C. Feeler gauge

D. Vernier caliper

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4

The compression ratio for Diesel engines usually lies in the range of

A. 6-10

B. 10-1

C. 15-25

D. 25-40

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4

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

A. Hydrometer

B. Hygrometer

C. Anemometer

D. Multimeter

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4

One effect of detonation is

A. Delay in ignition

B. Loss of power

C. Overheating of engine

D. Overcooling of engine

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4

When the battery is half (50%) charged, the specific gravity of acid in a battery is usually

A. 0.74

B. 1.00

C. 1.12

D. 1.19

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4

Wheel base of a vehicle is the

A. Distance between the centres of the front and rear wheels

B. Distance between the centres of the front tyres

C. Distance between the centres of the rear tyres

D. Extreme length of the vehicle

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4

Two general types of tyres are

A. Tube type and tubeless

B. Solid and tubeless

C. Air and pneumatic

D. Split rim and drop centre

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Highest useful compression ratio (HUCR) is the highest compression ratio at which the

A. Engine can run

B. Engine gives maximum output

C. Engine is most efficient

D. Fuel can be used in a test engine without knocking

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4

The purpose of a cylinder head gasket is to

A. Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head

B. Prevent engine oil from going into combustion chamber

C. Removes impurities from cylinder head lubricating oil

D. None of the above

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The basic purpose of tyre rotation on automobiles is to

A. Avoid ply separation

B. Equalize wear

C. Get better ride

D. None of these

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4

How many cells are used in a 12 volt car battery?

A. 2

B. 4

C. 6

D. 8

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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 ignition coil is used to

A. Step up current

B. Step down current

C. Step up voltage

D. Step down voltage

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4

Which of the following bulb in a car will have the least wattage?

A. Head light bulb

B. Stop light bulb

C. Parking light bulb

D. Ignition warning bulb

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4

It is necessary to maintain the valve clearances as they

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

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

C. Increase the speed at which the valves move up and down

D. Make the crankshaft turn smoothly

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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

The discharged lead acid battery has on its plates

A. Lead peroxide (PbO₂)

B. Spongy lead (Pb)

C. Lead sulphate (PbSO₄)

D. Sulphuric acid (H₂SO₄)

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4

The minimum parking brake force is generally ________ of gross vehicle mass (GVM).

A. 5 %

B. 10 %

C. 15 %

D. 20 %

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4

The function of a connecting rod is

A. To turn the flywheel

B. To drive the drive plate

C. To drive the fuel pump

D. To transmit motion of the piston to the crankshaft

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4

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

A. 500 rpm

B. 1000 rpm

C. 2000 rpm

D. 4000 rpm

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4

The condition that causes vapour locking in a brake system is

A. Overheating of the fluid due to frequent brake application

B. Overcooling of the brakes during high speed driving

C. Keeping the vehicle without use for an extended period

D. An excessively high engine speed on a downhill road

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4

Free pedal play in car clutches is about

A. 15 mm

B. 25 mm

C. 40mm

D. 60 mm

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4

The piston compression rings are made of

A. Cast iron

B. Steel

C. Aluminium

D. Bronze

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4

The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as

A. Supercharging

B. Auto ignition

C. Scavenging

D. Detonation

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4

In Diesel engines, during suction stroke, ________ is drawn in the cylinder.

A. Air and fuel

B. Only fuel

C. Only air

D. None of these

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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 difference between DOT 3 and DOT 4 brake fluids is

A. DOT 4 fluids have a higher boiling point than DOT 3 fluid

B. DOT 4 fluids have a lower boiling point than DOT 3 fluid

C. DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life

D. DOT 4 fluid is more resistant to freezing than DOT 3 fluid

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4

The firing order for an opposed four cylinder l.C. engine is

A. 1-2-3-4

B. 1-3-4-2

C. 1-4-3-2

D. 1-3-2-4

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The Diesel engines are also known as

A. Spark ignition (S.I.) engines

B. Compression ignition (C.I.) engines

C. Steam engines

D. None of these