This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “System of dimensions”.
1. What is the dimension of heat?
a) M L T -2
b) M L 2 T -2
c) M L 2 T -1
d) M L 2 T
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Explanation: Unit of heat is Joule. It is a form of energy that can be transferred from an object of high temperature to the lower one.
2. What is the dimension of dynamic viscosity?
a) M L -1 T -1
b) L -1 T -1
c) M L -2 T -1
d) M L -1 T -2
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Explanation: Unit of dynamic viscosity is kg/meter second. It is defined as a quantity measuring the force needed to overcome internal friction of a moving liquid.
3. What is the dimension of kinematic viscosity?
a) M L 2T -2
b) L 2T -2
c) L 2T -1
d) M L 2T -1
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Explanation: Unit of kinematic viscosity is m2/s. It is defined as dynamic viscosity per unit density.
4. What is the dimension of energy?
a) M L 2 T -2
b) M L 2 T -1
c) M L 1 T -2
d) M L T -2
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Explanation: Unit of energy is m N. It is a form of energy that can be transferred from one object to another.
5. What is the dimension of force?
a) M L T -1
b) L T -2
c) M T -2
d) M L T -2
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Explanation: Unit of force is N. It is a push or pull that can stop a moving object.
6. What is the dimension of density?
a) M L -3 T
b) M L -3
c) M L -3 T 2
d) M L -2
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Explanation: Unit of density is kg/m3. It is defined as mass per unit volume.
7. What is the dimension of acceleration?
a) M L T -2
b) L T -4
c) M L T -1
d) L T -2
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Explanation: Unit of acceleration is m/s2. It is defined as force per unit mass.
8. What is the dimension of specific heat?
a) L T -1 α -1
b) M L T -1 α -1
c) L T -2 α -1
d) M L T -2 α -1
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Explanation: Unit of specific heat is k J/kg K. The specific heat is the amount of heat per unit mass required to raise the temperature by one degree celsius.
9. What is the dimension of thermal conductivity?
a) M L T -3 α -1
b) M L T -3
c) M L T -2 α -1
d) M L T -3 α -2
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Explanation: Unit of thermal conductivity is W/m K. It is the amount of heat per unit time per unit area that can be conducted through a plate of unit thickness of a given material.
10. What is the dimension of gravity?
a) M L T -2
b) L T -2
c) M L T -1
d) L T -4
View Answer
Explanation: Unit of gravity is m/s2. It is a force that attracts a body towards itself.
Sanfoundry Global Education & Learning Series – Heat Transfer.
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