Heat NDA Questions

NDA Physics

Heat MCQ Questions


7.
The unit of specific heat capacity in SI units is
A.
J/kg
B.
J/kg·K
C.
J/m³
D.
J/K
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ANSWER :
B. J/kg·K
8.
The process by which heat is transferred through a fluid is called
A.
Conduction
B.
Convection
C.
Radiation
D.
Insulation
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ANSWER :
B. Convection
9.
Which of the following is a good conductor of heat?
A.
Wood
B.
Air
C.
Copper
D.
Plastic
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ANSWER :
C. Copper
10.
The heat transfer that does not require a medium is
A.
Conduction
B.
Convection
C.
Radiation
D.
None of the above
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ANSWER :
A. Conduction
11.
Global warming is primarily due to an increase in
A.
Solar radiation
B.
Greenhouse gases
C.
Earth's albedo
D.
Ocean currents
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ANSWER :
B. Greenhouse gases
12.
The greenhouse effect is caused by
A.
Absorption and emission of infrared radiation by the atmosphere
B.
Reflection of sunlight by the earth's surface
C.
Absorption of ultraviolet radiation by the ozone layer
D.
Reflection of infrared radiation by the atmosphere
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ANSWER :
A. Absorption and emission of infrared radiation by the atmosphere