Automobile Engineering

Question: In a spark plug, when the temperature of the central electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off carbon starts is referred to as the self cleaning temperature.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: The best fuels for compression ignition engines are
[A].

straight chain paraffins

[B].

aromatics

[C].

branched chain paraffins

[D].

napthalenes

Answer: Option D

Explanation:

No answer description available for this question.

Question: The anti-knock property of compression ignition engine fuel can be improved by adding
[A].

tetraethyl lead

[B].

trimethyl pentane

[C].

amyl nitrate

[D].

hexadecane

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the level of tension in the belt is too high, it can result in a loss of power or in bending of the rotating shaft or crankshaft.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel-injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: The advantage of the fuel injection system over the carburetor system is
[A].

improved fuel efficiency

[B].

improved emission

[C].

improved power output

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: A three way catalytic converter
[A].

recirculates exhaust gasses

[B].

burns fuel vapaour gasses

[C].

reduces N2, H2O, and CO2 emission levels

[D].

removes CO, HC, and NO2 from the exhaust gasses passing through it

Answer: Option D

Explanation:

No answer description available for this question.

Question: Instead of valves, the ports are used in case of
[A].

four stroke I.C. engines

[B].

two-stroke I.C. engines

[C].

V-6 engines

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: 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

Answer: Option B

Explanation:

No answer description available for this question.

Question: The camshaft is driven by the crankshaft via the timing belt.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.