250+ TOP MCQs on Power Plant and Answers

Steam and Gas Turbines Multiple Choice Questions on “Power Plant”.

1. Land based gas turbines are classified into _________ types.
a) 3
b) 2
c) 4
d) 6
Answer: b
Clarification: Land based gas turbines are sub divided into two types.

2. Heavy frame engines are a type of _______ based gas turbines.
a) land
b) vertical
c) air
d) none of the mentioned
Answer: a
Clarification: Heavy frame engines are type of land based engines.

3. Aero derivative engines are _________ based gas turbines.
a) air
b) vertical
c) land
d) none of the mentioned
Answer: c
Clarification: Aero derivative engines are land based gas turbines.

4. Heavy frame engines have _______ pressure ratios.
a) low
b) high
c) medium
d) none of the mentioned
Answer: a
Clarification: Heavy frame engines have low pressure ratios. Heavy frame engines work under low pressure ratios.

5. Aero derivative engines have _________ pressure ratios.
a) low
b) high
c) medium
d) none of the mentioned
Answer: b
Clarification: Aero derivative engines have higher pressure ratios. Heavy frame engines work under low pressure ratios.

6. Minimum compression ratio of aero derivative engines are ______
a) 20
b) 40
c) 30
d) 60
Answer: c
Clarification: Minimum compression ratio of aero derivative engines are 30.

7. Aero derivative engines are very ________ in size.
a) large
b) small
c) medium
d) none of the mentioned
Answer: b
Clarification: Aero derivative engines are very compact. That is why aero derivative engines have high pressure ratios.

8. _______ temperatures in gas turbines gives low efficiency.
a) low
b) high
c) medium
d) none of the mentioned
Answer: a
Clarification: High temperature in gas turbines gives high efficiency.

9. Temperatures in gas turbines are about _______
a) 1500 F
b) 1000 F
c) 2300 F
d) 1800 F
Answer: c
Clarification: Temperatures in gas turbines are about 2300F.

10. When inlet temperature is increased to 2600F then efficiency is about ____________
a) 20%
b) 30%
c) 80%
d) 60%
Answer: d
Clarification: When inlet temperature is increased to 2600F then efficiency is about 60%.