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Current Affairs January 2024

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4

The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

A. Indicator diagram

B. Axial force diagram

C. Valve timing diagram

D. None of these

Correct Answer :

C. Valve timing diagram


Related Questions

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4

The purpose of adding pigment to the paint is that it

A. Optimises the viscosity of paint

B. Makes paint film hard

C. Gives colour and filling up effect to the paint

D. None of the above

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4

The seat belt tensioners are built in the

A. Front seats

B. Shoulder anchors

C. Seat belt retractors

D. Seat belt buckles

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4

The petrol engines are also known as

A. Spark ignition (S.I.) engines

B. Compression ignition (C.I.) engines

C. Steam engines

D. None of these

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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

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

The function of a proportioning control valve (PCV) in a brake system is to

A. Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation

B. Reduce the brake fluid pressure when the brakes approach their lockup point

C. Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level

D. Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level.

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4

In aluminium cylinder blocks, the cylinder liners are made of

A. Aluminium

B. Ceramic

C. Brass

D. Cast iron

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4

The purpose of transmission in an automobile is

A. To vary the speed of automobile

B. To vary the torque at the wheels

C. To vary the power of automobile

D. None of these

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4

The information provided by the oxygen (O₂) sensor to the feedback control system is about the

A. Air-fuel ratio

B. Air temperature

C. Air flow speed

D. Exhaust gas volume

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4

The cam shaft in an engine is always mounted

A. Parallel to the crankshaft

B. Perpendicular to the crankshaft

C. Inclined to the crankshaft

D. None of these

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4

The basic characteristics of a brake fluid is

A. A high boiling point

B. Low viscosity

C. Compatibility with rubber and metal parts

D. All of these

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4

The two kinds of piston rings are

A. Compression and oil control rings

B. Compression and sliding seal rings

C. Oil scrapper and oil control rings

D. Pressure and sealing rings

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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 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

In a four speed four stroke Diesel engine, the intake valve

A. Opens at T.D.C. and closes at B.D.C.

B. Opens at 20° before T.D.C. and closes at 35° after B.D.C.

C. Opens at 10° after T.D.C. and closes at 20° before B.D.C.

D. None of the above

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4

The advantage of the fuel injection system over the carburettor system is

A. Improved fuel efficiency

B. Improved emission

C. Improved power output

D. All of these

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4

Damper is also known as

A. Shock absorber

B. Torsion bar

C. Spring

D. Radius rod

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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 ball joints are used on the tie rod ends, because they

A. Reduce the amount of noise generated

B. Reduce the amount of sliding resistance

C. Can deal with movement of the suspension both vertically and in other directions

D. Improve the force transmission speed

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4

The main characteristics of a maintenance free (MF) battery is that

A. A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid

B. A maintenance free battery has a relatively short shelf life when compared with standard batteries

C. Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water

D. Recharging of a maintenance free battery is neither required nor possible

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4

When a gear box has four forward speeds and one reverse speed, it is said to be a

A. 3-speed gear box

B. 4-speed gear box

C. 5-speed gear box

D. 6-speed gear box

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4

During suction stroke, the inside pressure of cylinder is

A. More than the atmospheric pressure

B. Less than the atmospheric pressure

C. Equal to the atmospheric pressure

D. None of these

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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

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

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

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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

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4

Which of the following parameter can be adjusted by modifying the tie rod attachment length?

A. Camber

B. Caster

C. Toe

D. Steering gear ratio

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4

The fuel that detonates easily, is

A. N-heptane

B. Iso-octane

C. Benzene

D. Alcohol

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4

The condition that results in large quantities of CO emission is

A. Insufficient air during combustion

B. Insufficient fuel during combustion

C. Low temperature combustion

D. High temperature combustion

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4

The self ignition temperature of Diesel as compared to petrol is

A. Higher

B. Lower

C. Same

D. Depends on fuel quality