Mechanical Engineering

Question: 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

Answer: Option B

Explanation:

No answer description available for this question.

Question: In Diesel engines, during suction stroke, __________ is drawn in the cylinder.
[A].

air and fuel

[B].

only fuel

[C].

only air

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: In petrol engines, during suction stroke, __________ is drawn in the cylinder
[A].

air and fuel

[B].

only fuel

[C].

only air

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: 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

Answer: Option A

Explanation:

No answer description available for this question.

Question: 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

Answer: Option A

Explanation:

No answer description available for this question.

Question: 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

Answer: Option A

Explanation:

No answer description available for this question.

Question: In an engine, the temperature of the piston will be more at the
[A].

crown of the piston

[B].

skirt of the piston

[C].

piston walls

[D].

piston rings

Answer: Option A

Explanation:

No answer description available for this question.

Question: The aluminium alloy is used in cylinder blocks because
[A].

it is lighter and have good heat dissipation characteristics

[B].

material cost is low

[C].

it does not require any cylinder liners

[D].

the piston is also made of aluminium alloy

Answer: Option A

Explanation:

No answer description available for this question.

Question: In aluminium cylinder blocks, the cylinder liners are made of
[A].

aluminium

[B].

ceramic

[C].

brass

[D].

cast iron

Answer: Option D

Explanation:

No answer description available for this question.