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Current Affairs January 2024

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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

Correct Answer :

D. Hydraulic multi plate clutch


Related Questions

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4

The purpose of turning radius gauges is to measure the

A. Contact areas of the tyres

B. Free plays of the steering wheel

C. Turning radius of the left and right wheels

D. Difference in the toe angles of the left and right wheels

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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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4

The purpose of a thermostat in an engine cooling system is to

A. Prevent the coolant from boiling

B. Allow the engine to warm up quickly

C. Indicate the coolant temperature

D. Pressurise the system to raise the boiling point

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4

Engine misfiring is likely to result from

A. Spark plug gap too small

B. Spark plug gap too wide

C. Vapours lock in the fuel only

D. Incorrect fuel air mixture

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4

The caster is called positive when the top of the king pin is inclined to the

A. Rear of the vehicle

B. Front of the vehicle

C. Left of the vehicle

D. Right of the vehicle

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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 material generally used for cylinder sleeves is

A. Aluminium

B. Ceramic

C. Cast iron

D. Fibre reinforced plastic

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4

Instead of valves, the ports are used in case of

A. Four stroke I.C. engines

B. Two stroke I.C. engines

C. V6 engines

D. None of these

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4

The main function of an exhaust muffler is the

A. Optimisation of exhaust efficiency

B. Reduction of exhaust noise

C. Reduction of nitrogen oxide in the exhaust gases

D. Reduction of the exhaust gas volume

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4

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

A. Increases the combustion temperature

B. Creates swirl

C. Maintains a seal and prevents the fuel leakage

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

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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 specific gravity of petrol is about

A. 0.75

B. 0.85

C. 0.95

D. 1.25

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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

Which of the following is not an automobile?

A. Motor cycle

B. Passenger car

C. Aeroplane

D. Truck

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

A. Cooling efficiency

B. Resistance to wear

C. Lubrication performance

D. None 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

Thinner is added to the paint in order to

A. Make pigments and resin mix easily

B. Make paint film hard

C. Optimise its viscosity

D. None of these

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4

The starter motor is driven by

A. Chain drive

B. Gear drive

C. Flat belt drive

D. V-belt drive

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4

The stroke of an engine is the

A. Volume of the cylinder

B. Length of the connecting rod

C. Internal diameter of the cylinder

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

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4

The oil pump is driven by the

A. Camshaft

B. Alternator shaft

C. Crankshaft via drive belt

D. Crankshaft directly

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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 torque converter uses ________ to transfer torque.

A. Air

B. Automatic transmission fluid (ATF)

C. Gears

D. Steel belt

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4

The heat transfer from coolant to air in the radiator of an automobile engine takes place by

A. Radiation only

B. Convention only

C. Convection and radiation

D. Conduction, convection and radiation

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4

The main function of the tread pattern on tyre is that

A. The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating

B. The crests between the tread grooves absorb road noise

C. In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface

D. The tread pattern protects the tyre's inner carcass from small stones and pieces of glass

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4

In case of a Diesel car, the pressure at the end of compression is of the order of

A. 15 bar

B. 25 bar

C. 35 bar

D. 45 bar

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4

The effect of vapour locking on the brake performance is that the

A. Brakes function more effectively

B. Brakes fail completely

C. Brake operation is delayed after depression of the brake pedal

D. Vapour locking has no effect on brake performance

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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