Effects of Heat NDA Questions

NDA Physics

Effects of Heat MCQ Questions


13.
Which of the following materials is an insulator of heat?
A.
Steel
B.
Copper
C.
Aluminum
D.
Wood
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ANSWER :
D. Wood
14.
The latent heat of vaporization is defined as
A.
The heat required to cool 1 gram of a substance by 1 degree Celsius
B.
The heat required to condense 1 gram of a gas
C.
The heat required to melt 1 gram of a solid at its melting point
D.
The heat required to vaporize 1 gram of a liquid at its boiling point
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ANSWER :
A. The heat required to cool 1 gram of a substance by 1 degree Celsius
15.
Which of the following phase changes occurs without passing through the liquid state?
A.
Evaporation
B.
Condensation
C.
Sublimation
D.
Fusion
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ANSWER :
C. Sublimation
16.
An increase in temperature generally causes substances to
A.
Expand
B.
Contract
C.
Remain the same size
D.
Become denser
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ANSWER :
A. Expand
17.
The temperature at which a liquid turns into a solid is called
A.
Melting point
B.
Boiling point
C.
Freezing point
D.
Condensation point
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ANSWER :
C. Freezing point
18.
Heat transfer through direct contact between molecules is called
A.
Convection
B.
Conduction
C.
Radiation
D.
Fusion
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ANSWER :
B. Conduction