Steam and Gas Turbines Multiple Choice Questions on “Performance Characteristics”.
1. In Compressor jet propulsion cycles pressure energy is added to the air steam.
a) True
b) False
Answer: a
Clarification: In compressor jet propulsion cycle pressure energy is added to the air steam.
2. Pressure energy is added to the air steam at _________ pressure ratios in compressor jet propulsion cycles.
a) high
b) low
c) medium
d) none of the mentioned
Answer: b
Clarification: Pressure energy is added to the air steam at low pressure ratios on compressor jet propulsion cycles.
3. The super critical steam first _________ while flowing through the turbine.
a) expands
b) expands & contracts
c) contracts
d) none of the mentioned
Answer: a
Clarification: Super critical steam expands while flowing through a turbine.
4. Turbine exhaust is connected to the ________
a) condenser
b) compressor
c) condenser & compressor
d) none of the mentioned
Answer: a
Clarification: The turbine exhaust is connected to the condenser where heat of vaporization is used.
5. In jet propulsion cycles _______ is used as working fluid.
a) water
b) methane
c) water & methane
d) none of the mentioned
Answer: a
Clarification: Water is used as working fluid in jet propulsion cycles.
6. In jet propulsion cycle specific impulse is ___________
a) high
b) low
c) medium
d) none of the mentioned
Answer: b
Clarification: In jet propulsion cycle specific impulse is low which is a major disadvantage.
7. When reactor pressure is increased above 400psi its performance is ___________
a) decreased
b) remains constant
c) increased
d) none of the mentioned
Answer: c
Clarification: When reactor pressure is increased above 400psi its performance is increased.
8. When reactor steam outlet pressure is increased performance is increased __________
a) Rapidly
b) Little
c) Pressure remains constant
d) None of the mentioned
Answer: b
Clarification: When reactor steam outlet pressure is increased performance is increased very little.
9. Specific impulse in jet propulsion is ________
a) low
b) high
c) medium
d) none of the mentioned
Answer: a
Clarification: Specific impulse was found to be low in jet propulsion cycles.
10. When condenser pressure is increased performance is _______
a) decreased
b) increased
c) remains constant
d) none of the mentioned
Answer: b
Clarification: When condenser pressure is increased performance also increases a little.