This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Automatic Extraction Turbines”.
1. Extraction turbines has an opening in its casing.
a) True
b) False
View Answer
Explanation: Extraction steam turbines has an opening in its casing.
2. __________ steam is moved to condenser from the turbine in a single step.
a) Total
b) partial
c) depends on load
d) none of the mentioned
View Answer
Explanation: Some of the steam is extracted at intermediate pressure from casing and the remaining steam is sent to condenser.
3. The steam extraction is __________ extracted.
a) automatically
b) manually
c) automatically or manually
d) none of the mentioned
View Answer
Explanation: The steam extraction may or may not be automatically extracted.
4. Regulated extraction _________ the total electricity produced.
a) reduces
b) increases
c) has no effect on
d) none of the mentioned
View Answer
Explanation: Regulated extraction increases the additional electricity produced by steam extraction from casing.
5. Each extracting points on the casing has ______ temperature.
a) different
b) same
c) depends on the load
d) none of the mentioned
View Answer
Explanation: At each extracting point there will be a different pressure and hence temperature also changes.
6. Each extracting points on the casing has _______ pressure.
a) same
b) different
c) depends on the load
d) none of the mentioned
View Answer
Explanation: Each extracting point on the casing has a different temperature and pressure.
7. Automatic extraction turbines generate electrical energy.
a) True
b) False
View Answer
Explanation: Automatic extraction turbines generate both electrical and thermal energy.
8. Automatic extraction turbine generate __________
a) mechanical & thermal energy
b) mechanical energy
c) thermal energy
d) none of the mentioned
View Answer
Explanation: Automatic extraction turbine generate both electrical and thermal energy.
9. __________ extraction turbines are combined heat and power supply turbines.
a) Automatic
b) Manual
c) Manual or Automatic
d) None of the mentioned
View Answer
Explanation: Combined heat and power supply turbines are classified as automatic extraction turbines,back pressure turbines and back pressure extraction turbines.
10. In automatic extraction turbines pressure of extracted steam is maintained by __________
a) Extraction points on case
b) Control system
c) Extraction points on case and Control system
d) None of the mentioned
View Answer
Explanation: In automatic extraction turbines pressure of extracted steam is maintained by control system.
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