Mechanical Engineering - IC Engines and Nuclear Power Plants Quiz (or) MCQ

1 .

The petrol engines are also known as __________ engines.

A)

spark ignition

B)

compression ignition

C)

Can Not Say

D)

None of the above

Correct Answer : Option (A) : spark ignition

2 .

In order to eliminate knocking in compression ignition engines, there should be

A)

late auto-ignition

B)

low compression ratio

C)

short delay period

D)

high self ignition temperature of fuel

Correct Answer : Option (C) : short delay period

3 .

If the speed of the engine is increased, the indicated power will

A)

decrease

B)

increase

C)

remain same

D)

None of the above

Correct Answer : Option (B) : increase

4 .

The reference fuels for knock rating of spark ignition engines would include

A)

normal octane and aniline

B)

iso-octane and normal hexane

C)

iso-octane and alpha-methyl naphthalene

D)

normal heptane and iso-octane

Correct Answer : Option (D) : normal heptane and iso-octane

5 .

The diesel engines are also known as __________ engines.

A)

spark ignition

B)

compression ignition

C)

Can Not Say

D)

None of the above

Correct Answer : Option (B) : compression ignition

6 .

The specific fuel consumption per B.P. hour for a petrol engine is about

A)

0.25 kg

B)

0.3 kg

C)

0.35 kg

D)

0.45 kg

Correct Answer : Option (A) : 0.25 kg

7 .

The material most commonly used for sheilding is

A)

lead

B)

carbon

C)

concrete

D)

All of the above

Correct Answer : Option (C) : concrete

8 .

The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

A)

25%

B)

50%

C)

70%

D)

100%

Correct Answer : Option (B) : 50%

9 .

In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

A)

end of suction stroke

B)

end of exhaust stroke

C)

beginning of exhaust stroke

D)

beginning of suction stroke

Correct Answer : Option (D) : beginning of suction stroke

10 .

The predominent isotope of the naturally occuring element is

A)

Pu₂₃₉

B)

U₂₃₈

C)

U₂₃₅

D)

Pu₂₃₃

Correct Answer : Option (B) : U₂₃₈