Steam and Gas Turbines Multiple Choice Questions on “Pressure Regulators”.
1. Gas pressure regulators are also used to measure flow rates.
a) True
b) False
Answer: b
Clarification: Gas pressure regulators are used to regulate gas pressure and not to measure flow rates. Flow meter, rotameter, etc are used to measure the flow rates.
2. In pressure regulators load flow is ___________ proportional to regulator flow.
a) directly
b) indirectly
c) depends
d) none
Answer: a
Clarification: In pressure regulators if load flow increases regulator flow should also increase i.e load flow is directly proportional to regulator flow.
3. A pressure regulator consists of __________
a) Restricting element
b) Loading element
c) Measuring element
d) All of the mentioned
Answer: d
Clarification: Pressure regulator consists of a restricting element, a loading element, and a measuring element.
4. Restricting element in a pressure regulator can be _________
a) Globe valve
b) Poppet valve
c) Butterfly valve
d) All of the mentioned
Answer: d
Clarification: Restricting the element of a pressure regulator is a valve. It can be a globe valve or poppet valve or butterfly valve.
5. Diaphragm actuator can be used as loading element.
a) True
b) False
Answer: a
Clarification: Loading element is something that bears force. Diaphragm actuator can also be used as loading element.
6. Loading element in the pressure regulator can be ______
a) Spring
b) Weight
c) Piston actuator
d) All of the mentioned
Answer: d
Clarification: Loading element is something that provides necessary force to the restricting element.
7. The measuring element _______________
a) Measures the inlet flow
b) Measures the outlet flow
c) Compares the inlet flow to the outlet flow
d) None of the mentioned
Answer: c
Clarification: Measuring element is used to determine when the inlet flow is equal to outlet flow.
8. Diaphragm can be used as ___________
a) measuring element
b) combining element
c) measuring & combining element
d) none of the mentioned
Answer: d
Clarification: Diaphragm can also be used as measuring element. It can be used as combined element.
9. Pressure regulators can be used in _______
a) Air compressors
b) Aircraft
c) Aerospace
d) All of the mentioned
Answer: d
Clarification: Pressure regulators are used where the pressure needs to be regulated according to the inlet flow.
10. _____________ are used in gas powered vehicles.
a) pressure regulators
b) temperature regulators
c) pressure & temperature regulators
d) none of the mentioned
Answer: a
Clarification: Pressure regulators are used in gas powered vehicles as the stored gas is needed to bring to the operating pressure from a high pressure of about 700 bar.