# Gas Turbines Questions and Answers – Power Plant

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Power Plant”.

1. Land based gas turbines are classified into _________ types.
a) 3
b) 2
c) 4
d) 6

Explanation: 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

Explanation: 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

Explanation: 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

Explanation: 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

Explanation: Aero derivative engines have higher pressure ratios. Heavy frame engines work under low pressure ratios.
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6. Minimum compression ratio of aero derivative engines are ______
a) 20
b) 40
c) 30
d) 60

Explanation: 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

Explanation: 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

Explanation: 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

Explanation: 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%

Explanation: When inlet temperature is increased to 2600F then efficiency is about 60%.

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