Steam and Gas Turbines Questions and Answers – Losses in Impulse Blade Passages

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Losses in Impulse Blade Passages”.

1. ____________ is developed when working fluid is passed through blade passage.
a) Internal heat loss
b) External heat loss
c) Heat loss
d) None of the mentioned
View Answer

Answer: a
Explanation: When working fluid is passing through blade passage, due to friction internal heat loss occurs.

2. Kinetic energy of working fluid is _________ kinetic energy of case lossless flow.
a) Equal to
b) Lesser than
c) Greater than
d) Depends on the situation
View Answer

Answer: c
Explanation: Kinetic energy of the case lossless flow is lesser than the kinetic energy of working fluid.

3. Ratio of actual velocity to velocity of case lossless flow is called as _______
a) Velocity coefficient
b) Velocity gradient
c) No specific ratio
d) None of the mentioned
View Answer

Answer: a
Explanation: Velocity coefficient is the ratio of actual velocity to velocity of case lossless flow.
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4. Difference between actual enthalpy of working fluid to case enthalpy of isoentropic flow is called as _______
a) Case lossless flow
b) Entropy change
c) Losses
d) None of the mentioned
View Answer

Answer: c
Explanation: Losses are the enthalpy differences between working fluid and casses of isoentropic flow.

5. The losses occurred due to enthalpy changes is caused due to _________
a) Pressure difference
b) Friction
c) Temperature difference
d) None of the mentioned
View Answer

Answer: b
Explanation: Friction causes the enthalpy change.

6. Velocity coefficient is applicable for __________
a) Parallel flow passage
b) Counter flow passage
c) All types of flow passages
d) None of the mentioned
View Answer

Answer: c
Explanation: Velocity coefficient is applicable for all types of flow passages.

7. Velocity coefficient can be applied for ___________ flow passage.
a) convergent
b) divergent
c) depends on
d) none of the mentioned
View Answer

Answer: a
Explanation: Velocity coefficient can be applied for any flow passage.
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8. Velocity coefficient can be applied for __________ blade passage.
a) none
b) impulse
c) reaction
d) any
View Answer

Answer: d
Explanation: Velocity coefficient can be applied for any flow passage.

9. Blade profile losses for a diffuser blade depends on ____________
a) Enthalpy
b) Entropy
c) Kinetic energy
d) None of the mentioned
View Answer

Answer: c
Explanation: Blade profile losses for a diffuser blade is related to the kinetic energy.
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10. Blade profile losses are ____________ losses of the stages at turbomachine.
a) Greater
b) Smaller
c) Equal
d) None of the mentioned
View Answer

Answer: b
Explanation: Losses at the stages of turbomachines are greater than blade profile losses.

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]

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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.

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