# Heat Transfer Questions and Answers – Rayleigh’s Method

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This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Rayleigh’s Method”.

1. What is the dimension of coefficient of volumetric expansion?
a) α
b) α 1
c) α -2
d) α -1

Explanation: Its unit is per degree. Coefficient of volumetric expansion is defined as the percentage increase in volume.

2. What is the dimension of convective film coefficient?
a) M T -3 α -1
b) M T -3 α -2
c) M T -2 α -1
d) M T -1 α -1

Explanation: Its unit is k cal/m2 hr degree. It is used in thermodynamics to calculate the heat and it is denoted by h.

3. What is the dimension of velocity?
a) L T -2
b) L T 1
c) L T -1
d) L T

Explanation: Its unit is m/s. Velocity is defined as a speed in a particular direction.
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4. What is the dimension of area?
a) M L 2
b) L 2
c) L 1
d) L 3

Explanation: Its unit is m2. It is defined as a range of activity or an interest.

5. What is the dimension of volume?
a) L 2
b) M L 3
c) L
d) L 3

Explanation: Its unit is m3. It is defined as a region or part of a town, a country or the world.
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6. What is the dimension of work?
a) M L 2 T -2
b) M L 2 T -1
c) M L 2 T
d) M L 1 T -2

Explanation: Its unit is m N. Work can be defined as transfer of energy.

7. What is the dimension of temperature?
a) α -2
b) α 2
c) α
d) M α

Explanation: Its unit is Kelvin. It refers to how cold or hot something is.

8. What is the dimension of mass?
a) M
b) M L
c) L
d) M L T

Explanation: Its unit is kg. It is the property of a physical body which determines the strength of its mutual gravitational attraction to the earth.

9. What is the dimension of length?
a) T
b) M
c) L
d) M L

Explanation: Its unit is a meter. in geometrical measurements, it is the most extended dimension of an object.

10. What is the dimension of time?
a) M T
b) T
c) M
d) M L

Explanation: Its unit is second. Time is a measure in which events can be ordered from the past through the present into the future.

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