1. The temperature of the sun is measured with
a) Platinum thermometer
b) Gas thermometer
c) Pyrometer
d) Vapour pressure thermometer
Explanation: Pyrometer
2. Absolute temperature can be calculated by
a) Mean square velocity
b) Motion of the molecule
c) Both (a) and (b)
d) None of the above
Explanation: Mean square velocity
3. Thermoelectric thermometer is based on
a) Photoelectric effect
b) Seeback effect
c) Compton effect
d) Joule effect
Explanation: Seeback effect
4. Maximum density of H2O is at the temperature
a) 32°F
b) 39.2°F
c) 42°F
d) 4°F
Explanation: 39.2°F
5. The study of physical phenomenon at low temperatures (below liquid nitrogen temperature) is called
a) Refrigeration
b) Radiation
c) Cryogenics
d) Pyrometry
Explanation: Cryogenics
6. ‘Stem Correction’ in platinum resistance thermometers are eliminated by the use of
a) Cells
b) Electrodes
c) Compensating leads
d) None of the above
Explanation: Compensating leads
7. The absolute zero is the temperature at which
a) Water freezes
b) All substances exist in solid state
c) Molecular motion ceases
d) None of the above
Explanation: Molecular motion ceases
8. Absolute scale of temperature is reproduced in the laboratory by making use of a
a) Radiation pyrometer
b) Platinum resistance thermometer
c) Constant volume helium gas thermometer
d) Constant pressure ideal gas thermometer
Explanation: Constant volume helium gas thermometer
9. Absolute zero (0 K) is that temperature at which
a) Matter ceases to exist
b) Ice melts and water freezes
c) Volume and pressure of a gas becomes zero
d) None of these
Explanation: Volume and pressure of a gas becomes zero
10. On which of the following scales of temperature, the temperature is never negative
a) Celsius
b) Fahrenheit
c) Reaumur
d) Kelvin
Explanation: Kelvin