MECHANIC MOTOR VEHICLE THEORY SEMESTER – II MCQ JULY 2018 PART-3

     MECHANIC MOTOR VEHICLE THEORY            SEMESTER–II MCQ JULY 2018 PART-3

A typical cooling system circuit has the thermostat between …..

a. Engine outlet and radiator

b. Radiator outlet and engine inlet

c. Both (a) & (b)

d. None of these

Answer : a. Engine outlet and radiator

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Lubricating oil ………..

a. Minimizes wear in moving parts 

b. Helps in keeping the parts cool .     

c. Washes away and carries away

d. All of these

Answer : d. All of these

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Viscosity index (VI) is a measure for the change of  

viscosity with change in ………

a. Temperature

b. Pressure

c. Volume

d. All of these

Answer : a. Temperature

The following part is not lubricated by Pressure feed system …..

a. Timing gears

b. Valve rods and Push rods

c. Rocker arms

d. Main bearings of crankshaft

Answer : b. Valve rods and Push rods

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Supercharging -

a. Increases intake pressure

b. Increases intake temperature

c. Increases flame speed

d. All of these

Answer : d. All of these

Turbochargers are generally-

a. Centrifugal compressors

c. Vane blowers

b. Reciprocating compressors       

d. Roots blower

Answer : a. Centrifugal compressors

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In which of the following compressors,

a slip coupling is used between the engine

and compressor for the variable speed

operations of the engines?

a. Piston cylinder type

b  Root blower

c. Vane type blower

d. Centrifugal compressor

d. Centrifugal compressor

If  the temperature of intake air in I.C. engine is

lowered, then its efficiency will ………..

a. Increase

b. Decrease

c  Remain same

d.   No effect

Answer : a. Increase

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Air fuel ratio for idling speed of a petrol engine is approximately …

a. 1:1

b. 5:1

c. 10:1

d. 15:1

Answer : c. 10:1

A muffler between the exhaust manifold and

 the end of the exhaust pipe causes …………..

a. A decrease in exhaust gas pressure

b. An increase in exhaust gas pressure

c. No change in exhaust gas pressure

d. Either (a) or (b) .

Answer : b. An increase in exhaust gas pressure

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