Steam and Gas Turbines Multiple Choice Questions on “Effect of Nozzle Governing”.
1. In nozzle governing flow rate is controlled by only ______________
a) closing nozzle
b) opening nozzle
c) closing & opening nozzle
d) none of the mentioned
Answer: b
Clarification: In nozzle governing flow rate is controlled by either opening or closing the valves.
2. ________ is regulated in nozzle governing.
a) Pressure
b) Temperature
c) Flow rate
d) None of the mentioned
Answer: c
Clarification: In nozzle governing flow rate is controlled by opening or closing the valves instead of regulating the pressure.
3. In nozzle governing Every nozzle is controlled by a separate valve.
a) True
b) False
Answer: a
Clarification: In nozzle governing each nozzle is controlled by a separate valve.
4. In turbine nozzle governing is applied on _________
a) 2nd stage
b) 1st stage
c) Final stages
d) 3rd stage
Answer: b
Clarification: In turbine nozzle governing is applied in first stage and remaining stages will be un affected.
5. Remaining stages of the turbine other than first stage remains ____________ in nozzle governing.
a) unaffected
b) affected
c) unaffected & affected
d) none of the mentioned
Answer: a
Clarification: Nozzle governing is applied only in first stage and remaining stages are unaffected as no pressure regulation is applied.
6. ________ boiler pressure can be obtained from nozzle governing.
a) Depends on the load
b) Partial
c) Full
d) None of the mentioned
Answer: c
Clarification: Full boiler pressure can be obtained as no pressure regulation is done.
7. _________ boiler temperature can be utilized by this nozzle governing.
a) Full
b) Partial
c) Depends on the load
d) None of the mentioned
Answer: a
Clarification: As there is no pressure regulation temperature also does not change and hence full boiler temperature can be used.
8. In subsequent stages of turbine pressure regulation is done.
a) True
b) False
Answer: b
Clarification: In subsequent stages of turbine pressure regulation is not done.
9. In nozzle when entropy ___________ supersaturation occurs.
a) increases
b) decreases
c) remains constant
d) none of the mentioned
Answer: a
Clarification: In nozzle supersaturation causes an increase in entropy.
10. When mass flow rate is maximum nozzle chokes.
a) True
b) False
Answer: a
Clarification: Nozzle chokes when mass flow rate is maximum during critical conditions.