# Thermodynamics Questions and Answers – Temperature Basics

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This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Temperature Basics”.

1. When a body A is in thermal equilibrium with a body B, and also separately with a body C, then B and C will be in thermal equilibrium with each other.
a) True
b) False

Explanation: Zeroth law of thermodynamics.

2. Which of the following were used as fixed points before 1954?
a) The ice point
b) The steam point
c) All of the mentioned
d) None of the mentioned

Explanation: Both of these were used.

3. What is the standard fixed point of thermometry?
a) The ice point
b) The steam point
c) The triple point of water
d) None of the mentioned

Explanation: After 1954, only one fixed point has been used.

4. All gases and vapours approach ideal gas behaviour at?
a) High pressure and high density
b) Low pressure and low density
c) High pressure and low density
d) Low pressure and high density

Explanation: Comes from ideal gas equation of state.

5. The value of ratio of the steam point temperature to the ice point temperature is?
a) 1.466
b) 1.266
c) 1.166
d) 1.366

Explanation: This value is a universal constant.

6. Celsius temperature of the triple point of water is ( in degree Celsius)?
a) -0.00
b) 0.00
c) 0.01
d) None of the mentioned

Explanation: Zero point of degree Celsius is shifted.

7. Which of the following is chosen as the standard thermometric substance?
a) Gas
b) Liquid
c) Solid
d) All of the mentioned

Explanation: Smallest variation is observed among different gas thermometers.

8. A real gas behaves as an ideal gas when?
a) Temperature approaches zero
b) Pressure approaches zero
c) Both temperature and pressure approaches zero
d) None of the mentioned

Explanation: It is a property of gas.

9. The temperature interval from the oxygen point to the gold point is divided into how many parts?
a) 2
b) 3
c) 4
d) 1

Explanation: Taken as international temperature scale.

10. Optical method is adopted for measuring temperatures higher than the gold point?
a) True
b) False 