250+ TOP MCQs on Mixed Pressure Turbine Performance and Answers

Steam and Gas Turbines Multiple Choice Questions on “Mixed Pressure Turbine Perfomance”.

1. Mixed pressure steam turbines are driven by _________ kinds of steam.
a) 1
b) 2 or more
c) 3
d) 5
Answer: b
Clarification: Mixed pressure turbines are driven by two or more kinds of steam.

2. In mixed pressure turbine existing boiler can be combined with new boiler.
a) True
b) False
Answer: a
Clarification: Both the steams are fed into turbine independently and in this type of turbine existing boiler can be combined with new boiler.

3. In dual heat sources optimum heat for each condition cannot be selected in mixed pressure turbine.
a) True
b) False
Answer: b
Clarification: In dual heat sources optimum heat for each condition can be selected in mixed pressure turbine.

4. Radial turbines gain their high efficiencies at the speed ratio of ___________
a) 0.5
b) 0.7
c) 1
d) 2.6
Answer: c
Clarification: Radial turbines get their peak efficiencies at the speed ratio of 0.7

5. Radial turbine has _______ degree of freedom when compared to mixed flow turbine.
a) more
b) less
c) equal
d) none of the mentioned
Answer: b
Clarification: Radial turbine has less degree of freedom when compared to mixed flow turbine.

6. The blade inlet angle at radial blade section is ________ in mixed flow turbine.
a) non zero
b) zero
c) depends on the mass flow rate
d) none of the mentioned
Answer: a
Clarification: The blade inlet angle at radial blade section is non zero in mixed flow turbine.

7. Stress levels in mixed flow turbine are ________
a) high
b) less
c) medium
d) none of the mentioned
Answer: b
Clarification: Stress levels in mixed flow turbines are less.

8. Mixed flow turbines are designed at ________ inertia.
a) high
b) medium
c) low
d) none of the mentioned
Answer: c
Clarification: Mixed flow turbines are designed at low inertia.

9. Radial turbines are characterized by ____________
a) radial fibers
b) centrifugal compressors
c) radial compressors
d) none of the mentioned
Answer: a
Clarification: Radial turbines are characterized by radial fibers.

10. Turbochargers in automobiles works under _______ pulsation inlet flows.
a) low
b) high
c) medium
d) none of the mentioned
Answer: b
Clarification: Turbochargers in automobiles works under high pulsation inlet flows.