# Steam Turbines Questions and Answers – Energy Transfer Relation and Losses

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

1. Temperature of the steam leaving the boiler is ____________
a) low
b) high
c) medium
d) none of the mentioned

Explanation: Steam leaves the boiler at super heated stage with high temperature.

2. Pressure of the steam leaving the boiler is ______
a) low
b) medium
c) high
d) none of the mentioned

Explanation: Steam leaves the boiler at super heated stage with high pressure.

3. Steam when passes through the nozzle _______ its kinetic energy.
a) Increases
b) Decreases
c) Nozzle has nothing to do with kinetic energy
d) None of the mentioned

Explanation: When steam is passed through the nozzle its velocity increases as a result its kinetic energy increases.

4. In a reaction turbine fixed nozzle is replaced by __________
c) moving vanes
d) none of the mentioned

Explanation: In a reaction turbine the work of increasing kinetic energy is done by fixed blades.

5. Work done by the condenser is product of mass flow and _______
a) final enthalpy
b) initial enthalpy
c) change in enthalpy
d) none of the mentioned

Explanation: Work done by the condenser is product of mass flow and change in enthalpy.
Note: Join free Sanfoundry classes at Telegram or Youtube

6. Turbine performance is ____________ proportional to isoentropic efficiency.
a) directly
b) inversly
c) not proportional
d) none of the mentioned

Explanation: Turbine performance is directly proportional to isoentropic efficiency.

7. While calculating isoentropic efficiency heat loss to the surroundings is assumed to be _______
a) high
b) low
c) medium
d) none of the mentioned

Explanation: While calculating isoentropic efficiency heat loss to the surrounding is assumed to be zero.

8. The starting temperature of actual turbine is ________ the ideal turbine.
a) less than
b) greater than
c) equal to
d) none of the mentioned

Explanation: The starting temperature of the both actual and ideal turbine is equal.

9. The starting pressure of actual turbine is __________ that of ideal turbine.
a) equal to
b) more than
c) less than
d) none of the mentioned

Explanation: The starting pressure of both actual and ideal turbine is equal.

10. Isoentropic efficiency is the _________ of actual work and ideal work.
a) product
b) ratio
c) sum
d) none of the mentioned

Explanation: Isoentropic efficiency is the ratio of actual work to ideal work.

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]