# Steam and Gas Turbines Questions and Answers – Film Coefficient, Pressure Losses and Regenerator Effectiveness

This set of Steam and Gas Turbines online test focuses on “Film Coefficient, Pressure Losses and Regenerator Effectiveness”.

1. Film coefficient is also known as heat transfer coefficient.
a) True
b) False

Explanation: Film coefficient is also known as heat transfer coefficient.

2. Film coefficient is the proportionality coefficient between heat flux and ___________
a) opposing force
b) driving force
c) opposing & driving force
d) none of the mentioned

Explanation: Film coefficient is the proportionality coefficient between heat flux and driving force.

3. Film coefficient is represented by _______
a) t
b) g
c) h
d) f

Explanation: Heat transfer coefficient is represented by h.

4. ___________ is used in phase transition process.
a) Film coefficient
b) Pressure coefficient
c) Mean temperature
d) None of the mentioned

Explanation: Film coefficient is used in phase transition process.

5. Film coefficient is _________ of thermal insulance.
a) directly proportional
b) inverse
c) equal
d) none of the mentioned

Explanation: Film coefficient is inverse of thermal insulance. Film coefficient is the inverse of the resistance offered by the material towards heat.

6. Ratio of thermal conductivity to the length scale is known as __________
a) Film coefficient
b) Heat transfer coefficient
c) Film & Heat transfer coefficient
d) None of the mentioned

Explanation: Ratio of thermal conductivity to length is known as film coefficient.

7. Nusselt number has ________
a) no dimension
b) dimension
c) no units
d) none of the mentioned

Explanation: Nusselts number is a dimensionless number. Nusselt’s number is used in calculating heat transfer.

8. Overall heat transfer coefficient is represented by _______
a) K
b) A
c) U
d) I

Explanation: Overall heat transfer coefficient is represented by U.

9. Nusselts number applies to _______
a) Laminar flow
b) Turbulent flow
c) Laminar & Turbulent flow
d) None of the mentioned

Explanation: Nusselts number is applicable to both laminar and turbulent flow.

10. Mass flux is denoted by ______
a) J
b) G
c) U
d) None of the mentioned

Explanation: Mass flux is represented by j.

Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

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