Engineering Questions with Answers - Multiple Choice Questions
Steam Turbines MCQ’s – Energy Transfer Relation and Losses
1 - Question
Temperature of the steam leaving the boiler is ____________
a) low
b) high
c) medium
d) none of the mentioned
View Answer
Answer: b
Explanation: Steam leaves the boiler at super heated stage with high temperature.
2 - Question
Pressure of the steam leaving the boiler is ______
a) low
b) medium
c) high
d) none of the mentioned
View Answer
Answer: c
Explanation: Steam leaves the boiler at super heated stage with high pressure.
3 - Question
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
View Answer
Answer: a
Explanation: When steam is passed through the nozzle its velocity increases as a result its kinetic energy increases.
4 - Question
In a reaction turbine fixed nozzle is replaced by __________
a) guide blades
b) fixed blades
c) moving vanes
d) none of the mentioned
View Answer
Answer: b
Explanation: In a reaction turbine the work of increasing kinetic energy is done by fixed blades.
5 - Question
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
View Answer
Answer: c
Explanation: Work done by the condenser is product of mass flow and change in enthalpy.
6 - Question
Turbine performance is ____________ proportional to isoentropic efficiency.
a) directly
b) inversly
c) not proportional
d) none of the mentioned
View Answer
Answer: a
Explanation: Turbine performance is directly proportional to isoentropic efficiency.
7 - Question
While calculating isoentropic efficiency heat loss to the surroundings is assumed to be _______
a) high
b) low
c) medium
d) none of the mentioned
View Answer
Answer: b
Explanation: While calculating isoentropic efficiency heat loss to the surrounding is assumed to be zero.
8 - Question
The starting temperature of actual turbine is ________ the ideal turbine.
a) less than
b) greater than
c) equal to
d) none of the mentioned
View Answer
Answer: c
Explanation: The starting temperature of the both actual and ideal turbine is equal.
9 - Question
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
View Answer
Answer:a
Explanation: The starting pressure of both actual and ideal turbine is equal.
10 - Question
Isoentropic efficiency is the _________ of actual work and ideal work.
a) product
b) ratio
c) sum
d) none of the mentioned
View Answer
Answer: b
Explanation: Isoentropic efficiency is the ratio of actual work to ideal work.