250+ TOP MCQs on Dimensionless Performance Parameters and Answers

Steam and Gas Turbines Multiple Choice Questions on “Dimensionless Performance Parameters”.

1. Dimensional analysis can be used to compare gas turbines.
a) True
b) False
Answer: a
Clarification: Dimensionless analysis can be used to compare gas turbines.

2. Reynolds number is a __________ parameter.
a) constant
b) have dimension
c) dimensionless constant
d) none of the mentioned
Answer: c
Clarification: Reynolds number is a dimensionless parameter.

3. Power is expressed in ___________
a) Horsepower
b) Volts
c) Ohms
d) None of the mentioned
Answer: a
Clarification: Power is expressed in horsepower.

4. Flow coefficient has no _______
a) value
b) dimension
c) flow coefficient is constant
d) none of the mentioned
Answer: b
Clarification: Flow coefficient has no dimension.

5. Pressure coefficient has ___________
a) no value
b) dimension
c) no dimension
d) none of the mentioned
Answer: c
Clarification: Pressure when expressed in dimensionless parameter is called as pressure coefficient.

6. ____________ when expressed in the form of dimensionless quantity is known as flow coefficient.
a) Flow rate
b) Pressure
c) Flow rate & Pressure
d) None of the mentioned
Answer: a
Clarification: Flow coefficient is a dimensionless quantity.

7. Mach number is a _________ parameter.
a) valued
b) dimensionless
c) valued & dimensionless
d) none of the mentioned
Answer: b
Clarification: Mach number is a dimensionless parameter.

8. Gas constants are classified under ________ dimension groups.
a) quasi
b) uni
c) multiple
d) none of the mentioned
Answer:a
Clarification: Gas constants are classified under quasi dimension groups.

9. Corrected groups are __________ proportional to quasi dimension groups.
a) inversely
b) directly
c) not related
d) none of the mentioned
Answer: b
Clarification: Corrected groups are directly proportional to quasi dimensional groups.

10. Working fluid properties are present in scaling parameter groups.
a) True
b) False
Answer: b
Clarification: Working fluid properties are not present in scaling parameter groups.