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Current Affairs January 2024

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4

When the front wheels of a vehicle are locked during braking, then

A. Stopping distance becomes extremely long

B. Front tyres skid across the road surface, and the vehicle spins around

C. Rear tyres skid across the road surface, and the vehicle spins around

D. Driver loses control over the steering, and the vehicle continues moving in its current direction

Correct Answer :

D. Driver loses control over the steering, and the vehicle continues moving in its current direction


Related Questions

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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

Which of the following symptom is caused as a result of brake disc run out?

A. Ineffectiveness of the brakes

B. Judder during braking

C. Localized wearing of the brake pads

D. Rapid wearing of the brake pads

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4

The rolling resistance is because of the friction between the

A. Wheel rim and tyre

B. Tyre and the road surface

C. Wheel rim and road surface

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 exhaust gas from petrol engine contains

A. Petrol vapours

B. Water vapours

C. Carbon monoxide

D. All of these

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4

The best fuels for compression ignition engines are

A. Straight chain paraffin

B. Aromatics

C. Branched chain paraffin

D. Naphthalene

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4

The material generally used for cylinder sleeves is

A. Aluminium

B. Ceramic

C. Cast iron

D. Fibre reinforced plastic

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4

The clutch is located between the transmission and the

A. Engine

B. Rear axle

C. Propeller shaft

D. Differential

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4

In a Diesel engine, the function of a fuel injector is to

A. Mix the fuel and air

B. Ignite the air-fuel mixture

C. Provide flame front for ignition

D. Spray atomized fuel in the cylinder

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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

Clutch facings are usually attached to the plate by

A. Steel rivets

B. Brass rivets

C. Aluminium screws

D. Steel screws

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4

In a four stroke engine for each crankshaft revolution, the camshaft revolves

A. One half turn

B. One turn

C. Two turns

D. Four turns

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4

The negative terminal post on the top of a battery is

A. Smaller than the positive terminal post

B. Larger than the positive terminal post

C. Of the same size as the positive terminal post

D. None of these

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4

The path taken by intake air is

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

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

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

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

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4

A front stabilizer bar is used to

A. Increase vehicle load carrying capacity

B. Provide a softer ride

C. Control suspension movement and body roll

D. All of the above

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4

The mechanical efficiency (ηm) of an I.C. engine is equal to (where I.P. = Indicated power, B.P. = Brake power and F.P. = Frictional power)

A. I.P/B.P.

B. B.P/I.P.

C. B.P/F.P.

D. F.P/B.P.

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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

If the air-fuel mixture in a spark ignition engine is too rich, then airfuel ratio is about

A. 17 : 1

B. 15 : 1

C. 13 : 1

D. 10 : 1

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4

The most commonly used supplementary restraint system (SRS) component is

A. Seat belt

B. Brake

C. Airbag

D. Steering

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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

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4

The ignition in a spark ignition engine takes place when the piston is

A. Exactly at the T.D.C. position on its compression stroke

B. Approaching the T.D.C. position on its compression stroke

C. Leaving the T.D.C. position on its compression stroke

D. Approaching the T.D.C position on its exhaust stroke

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4

A petrol engine of a car develops 125 Nm torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is

A. 8.091 Nm

B. 80.91 Nm

C. 809.1 Nm

D. 8091 Nm

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4

The crescent shaped cavity on the piston head top surface is called as

A. Piston oil hole

B. Snap ring

C. Valve recess

D. Valve clearance

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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

A three way catalytic converter

A. Re-circulates exhaust gases

B. Burns fuel vapour gases

C. Reduces N₂, H₂O, and CO₂ emission levels

D. Removes CO, HC, and NO₂ from the exhaust gasses passing through it

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4

With the increase of battery temperature, the specific gravity of electrolyte

A. Increases

B. Decreases

C. Remains the same

D. None 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

In which of the following conditions, the idle CO percentage should be measured with the vehicle?

A. Headlights and other electrical devices are switched off

B. Headlights and other electrical devices are switched on

C. Headlights and other lights are switched off

D. Headlights are switched on

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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

The service brakes employed in cars are generally operated

A. Mechanically

B. Hydraulically

C. Pneumatically

D. None of these