Steam Turbines Questions and Answers – Surging

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

1. A back flow from discharge to suction in compressor is called as __________
a) Pitching
b) Yawning
c) Surging
d) None of the mentioned
View Answer

Answer: c
Explanation: Back flow of working fluid from discharge section to suction in compressor is called as surging.

2. Surging occurs when mass flow crosses ________
a) critical value
b) peak pressure
c) below critical value
d) none of the mentioned
View Answer

Answer: b
Explanation: Surging occurs when mass flow falls below the critical value.

3. Surging occurs when pressure difference is ________
a) high
b) low
c) medium
d) none of the mentioned
View Answer

Answer: a
Explanation: When surging is occurred high pressure difference is established.
advertisement
advertisement

4. Surging _________ the speed of rotation.
a) increases
b) decreases
c) remains constant
d) none of the mentioned
View Answer

Answer: b
Explanation: Surging decreases the speed of the rotation.

5. Surging produces _______ vibrations.
a) heavy
b) little
c) medium range
d) none of the mentioned
View Answer

Answer: a
Explanation: Surging produces heavy vibrations due to forward and backward flow of fluid.
Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now!

6. Surging effects the working of __________
a) compressor
b) turbine
c) surging
d) none of the mentioned
View Answer

Answer: d
Explanation: Surging effects working of compressor.

7. Surging also damages pipelines.
a) True
b) False
View Answer

Answer: a
Explanation: Surging damages the pipelines due to vibration produced.
advertisement

8. Due to surging when pressure changes_________ turbine shuts down.
a) very high
b) very low
c) to zero
d) none of the mentioned
View Answer

Answer: b
Explanation: Due to surging when the pressure drops very low turbine may shut down.

9. Surging only ________ the speed.
a) increases
b) increases & decreases
c) decreases
d) none of the mentioned
View Answer

Answer: c
Explanation: Surging not only reduces the speed sometimes it leads to overspeed.
advertisement

10. Surging can be prevented by anti surge systems and control valve.
a) True
b) False
View Answer

Answer: a
Explanation: Surging can be prevented by anti surge systems and control valve.

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.