IC Engines and Nuclear Power Plants

Question: In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
[A].

75% iso-octane and 25% normal heptane

[B].

75% normal heptane and 25% iso-octane

[C].

75% petrol and 25% diesel

[D].

75% diesel and 25% petrol

Answer: Option A

Explanation:

No answer description available for this question.

Question: Alpha-methyl-naphthalene (C11 H10) has a cetane number of
[A].

0

[B].

50

[C].

100

[D].

120

Answer: Option A

Explanation:

No answer description available for this question.

Question: Iso-octane (C8H18) has octane number of
[A].

0

[B].

50

[C].

100

[D].

120

Answer: Option C

Explanation:

No answer description available for this question.

Question: A higher compression ratio causes
[A].

pre-ignition

[B].

increase in detonation

[C].

an acceleration in the rate of combustion

[D].

any one of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: A fuel will detonate less if it has higher self ignition temperature.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
[A].

low density

[B].

low temperature

[C].

long ignition delay

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: In qualitative governing, the quantity of fuel is varied to suit the load on the engine and the total charge of air is altered.
[A].

Correct

[B].

Incorrect

Answer: Option B

Explanation:

No answer description available for this question.

Question: In hit and miss governing, the fuel supply is cut-off completely during one or more number of cycles.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: The air-fuel ratio of the petrol engine is controlled by
[A].

carburettor

[B].

injector

[C].

governor

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.