Thermodynamics and Heat CDS Questions

CDS Physics

Thermodynamics and Heat MCQ Questions


1.
Temperature is best defined as a physical quantity that measures:
A.
The mass of molecules present in a body
B.
The degree of hotness or coldness of a body, related to the average kinetic energy of its molecules
C.
The total heat energy contained within a body
D.
The total internal energy of a closed system
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ANSWER :
B. The degree of hotness or coldness of a body, related to the average kinetic energy of its molecules
2.
On the Celsius temperature scale, the freezing point and boiling point of water (at standard atmospheric pressure) are respectively:
A.
273°C and 373°C
B.
0°C and 212°C
C.
0°C and 100°C
D.
32°C and 212°C
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ANSWER :
C. 0°C and 100°C
3.
On the Fahrenheit temperature scale, the freezing point and boiling point of water (at standard atmospheric pressure) are respectively:
A.
0°F and 212°F
B.
273°F and 373°F
C.
32°F and 212°F
D.
0°F and 100°F
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ANSWER :
C. 32°F and 212°F
4.
The Kelvin temperature scale, used as the SI unit of thermodynamic temperature, defines absolute zero (0 K) as equivalent to approximately:
A.
0°C
B.
-273.15°C
C.
-100°C
D.
-373.15°C
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ANSWER :
B. -273.15°C
5.
The correct formula for converting a temperature from Celsius (C) to Fahrenheit (F) is:
A.
F = (9/5)C - 32
B.
F = (5/9)C + 32
C.
F = (9/5)C + 32
D.
F = (5/9)(C + 32)
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ANSWER :
C. F = (9/5)C + 32
6.
The correct formula for converting a temperature from Celsius (C) to Kelvin (K) is:
A.
K = C + 273.15
B.
K = (9/5)C + 273.15
C.
K = (5/9)C + 273.15
D.
K = C - 273.15
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ANSWER :
A. K = C + 273.15