Power Plant Questions and Answers – Electricity Generation – II

This set of Power Plant Assessment Questions and Answers focuses on “Electricity Generation – II”.

1. Single stage impulse turbines are also called as?
a) Laval Turbines
b) Lancashire Turbines
c) Cochran Turbines
d) La Del turbines
View Answer

Answer: a
Explanation: Laval Turbines are single-stage impulse turbines.

2. There are basically ______ Ways of compounding steam turbines.
a) 2
b) 3
c) 4
d) 5
View Answer

Answer: a
Explanation: There are basically 2 ways of compounding steam turbines namely, Rateau staging & Curtis staging.

3. Rateau staging is another name for?
a) Pressure compounding
b) Velocity compounding
c) Pressure & Velocity compounding
d) None of the mentioned
View Answer

Answer: a
Explanation: Pressure compounding is also called as Rateau staging.
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4. The another name for Velocity compounding is?
a) Rateau Staging
b) Curtis staging
c) Rateau & Curtis staging
d) None of the mentioned
View Answer

Answer: b
Explanation: The another name for Velocity compounding is Curtis Staging.

5. The Guide vanes remain stationary in?
a) Curtis staging
b) Rateau staging
c) Rateau & Curtis staging
d) None of the mentioned
View Answer

Answer: a
Explanation: The guide vanes remain stationary in velocity compounding to ensure better operating efficiency.
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6. The pressure drop in reaction turbines occurs in?
a) fixed blades
b) movable blades
c) both in nozzles & fixed blades
d) nozzles
View Answer

Answer: c
Explanation: The pressure drop in reaction turbines occurs in both, the nozzle & in fixed blades.

7. The loss in efficiency from one stage to another is called?
a) Lost efficiency
b) Carry below efficiency
c) Carry-over efficiency
d) None of the mentioned
View Answer

Answer: c
Explanation: Carry-over efficiency is defined as the loss in efficiency from one stage to another.
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8. For straight blades, the minimum blade height is __________ of the mean blade ring diameter.
a) 20%
b) 30%
c) 40%
d) 50%
View Answer

Answer: a
Explanation: For straight blades, the minimum blade height is 20% of the mean blade ring diameter.

9. Number of parallel exhausts required for a given steam flow rate of x is?
a) x/63.5
b) x/36.5
c) x/68.5
d) x/56.5
View Answer

Answer: a
Explanation: Number of parallel exhausts required for a given steam flow rate of x is, x/63.5.
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10. External loses occur ___________ turbine casing.
a) inside
b) outside
c) inside & outside
d) none of the mentioned
View Answer

Answer: b
Explanation: External loses are those which occur outside the turbine casing.

Sanfoundry Global Education & Learning Series – Power Plant Engineering.

To practice all areas of Power Plant Assessment Questions, here is complete set of 1000+ Multiple Choice Questions and Answers.

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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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