IC Engines and Nuclear Power Plants - Section 1 (3)

Directions to Solve

IC Engines and Nuclear Power Plants - Section 1

17.

The increase of cooling water temperature in petrol engine will __________ the knocking tendency.

A.	not effect
B.	decrease
C.	increase

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

18.

The pressure inside the cylinder is __________ the atmospheric pressure during the exhaust stroke.

A.	equal to
B.	below
C.	above

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

19.

The self ignition temperature of petrol is __________ as compared to diesel oil.

A.	same
B.	lower
C.	higher
D.	grater

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

20.

A diesel engine has

A.	one valve
B.	two valves
C.	three valves
D.	four valves

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

21.

The thermal efficiency of diesel engines is about

A.	15%
B.	30%
C.	50%
D.	70%

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

22.

The purpose of testing an internal combustion engine is

A.	to determine the information, which can not be obtained by calculations
B.	to conform the data used in design, the validity of which may be doubtful
C.	to satisfy the customer regarding the performance of the engine
D.	all of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

23.

The effective inhibitor of pre-ignition is

A.	alcohol
B.	water
C.	lead
D.	none of these

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

24.

The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the

A.	jet area is automatically varied depending on the suction
B.	the flow from the main jet is diverted to the compensating jet with increase in speed
C.	the diameter of the jet is constant and the discharge coefficient is invariant
D.	flow is produced due to the static head in the float chamber

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

1
2
3
4
5
6
7