Steam Turbines Questions and Answers – Control and Performance

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

1. Gas turbine controls are classified into ____ types.
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: b
Explanation: Gas turbine drives are classified into two types.

2. DSC interface is used in __________
a) compressor drive
b) turbine drive
c) compressor & turbine drive
d) none of the mentioned
View Answer

Answer: c
Explanation: Both DSC interface and Graphic interface is used in both compressor drive and turbine drive.

3. In gas turbines Load control is available in _______
a) compressor drives
b) generator drives
c) compressor & generator drive
d) none of the mentioned
View Answer

Answer: b
Explanation: Load control is available in generator drives as load can be applied or decreased only on the generator not on the compressor.
advertisement
advertisement

4. Communication interfaces are ___________ in steam drives.
a) available
b) not available
c) depends on the usage
d) none
View Answer

Answer: a
Explanation: Communication interface is available in steam drives.

5. Steam turbine performance is expressed in _______
a) heat rate
b) steam rate
c) heat & steam rate
d) none of the mentioned
View Answer

Answer: b
Explanation: Steam turbine performance is expressed in steam rate.
Note: Join free Sanfoundry classes at Telegram or Youtube

6. Gas turbine performance is expressed in terms of _______
a) heat & steam rate
b) steam rate
c) heat rate
d) none of the mentioned
View Answer

Answer: c
Explanation: Gas turbine performance is expressed in terms of heat rate while steam turbine is expressed in terms of steam rate.

7. Gas turbine performance is directly proportional to the ______
a) inlet air density
b) inlet air temperature
c) inlet air density & inlet air temperature
d) none of the mentioned
View Answer

Answer: a
Explanation: Gas turbine performance is directly proportional to inlet air density as inlet air density increases its inlet air mass which increases the performance of gas turbine.
advertisement

8. In a gas turbine power produced is _________ to inlet air density.
a) indirectly proportional
b) directly proportional
c) not proportional
d) one
View Answer

Answer: b
Explanation: As inlet air density is directly related to the performance of gas turbine, When inlet air density is increased its performance increased which means the power produced by gas turbine is increased.

9. In a gas turbine when firing temperature is __________ engine efficiency changes.
a) increased
b) decreased
c) remained constant
d) none of the mentioned
View Answer

Answer: a
Explanation: When firing temperature is increased its environmental air conditions are altered so that its engine efficiency changes.
advertisement

10. In steam turbines vapor and vapor conditions change with time.
a) True
b) False
View Answer

Answer: a
Explanation: In steam turbine both vapor and vapor conditions are constant and that’s what makes calculating the steam turbine performance easy where as in gas turbines both vapor and vapor conditions are not constant and that makes it difficult for calculating performance.

Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

To practice all areas of Steam and Gas Turbines, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

advertisement
advertisement
Subscribe to our Newsletters (Subject-wise). Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

Youtube | Telegram | LinkedIn | Instagram | Facebook | Twitter | Pinterest
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.