# Mcq on first law of thermodynamics

The Mechanical engineering, is playing a vital role in today's Technology
It Assist you to done things with ease, and also it brings the helpful technologies to modernize our society.

So keeping these things in mind, Lets learn about the topic of Mcq on first law of thermodynamics

Multiple choice questions (MCQ)on First law of thermodynamics. First law of thermodynamics

Objective questions:
1. Which law states that the energy cannot be created nor be destroyed.
A. First law of thermodynamics
B. Second law of thermodynamics
C. Third law of Thermodynamics

2. Who discovered the first law of thermodynamics
A. Newton
B. Joule
C. Lewis
D. Henery

3. First law deals with the law of conservation of energy.
A. True
B. False

4. Equation of the first law of thermodynamics is as follows...
A. E= i- w
B. E= i* w
C. E= i+ w
D. E= i÷ w

5. First law of thermodynamics is all about...
A. Enthalpy
B. Entropy
C. Internal energy
D. Temperature

6. Storage of energy the property is..
A. Temperature
B. Internal energy
C. Enthalpy
D. Entropy

7. Internal energy is a point function.
A. True
B. False

8. Enthalpy is a directly proportional to...
A. Internal energy
B. Entropy
C. Pressure
D. Volume

9. SI unit of enthalpy is...
A. J/kg
B. J/k
C. Kg/J
D. K/kgk

10. SI unit of entropy is...
A. J/kg
B. J/k
C. Kg/J
D. K/kgk

11. Work and heat are path function.
A. True
B. False

12. Arc length is example of path function.
A. True
B. False

13. Pressure is a extensive property of thermodynamics system.
A. True
B. False

14. Volume is extensive Property of thermodynamics system.
A. True
B. False

15. Specific volume of a system is which property...
A. Intensive
B. Extensive
C. Both of the above
D. None of the above

16. The specific heat of water is....
A. 1.817
B. 2.521
C. 4.187
D. 2187

17. An open system in which both the heat and work as well as mass transfer through the boundary of system.
A. True
B. False

18. One kilowatt is equal to...
A. 1Nm/s
B. 100N
C. 1000N
D. 1000Nm/s

19. The absolute zero pressure will be...
A. When molecular momentum of the system becomes zero
B. At sea level
C. At temperature -273 k
D. At the centre of the earth

20. The state of a substance whose evaporation from its liquid state is complete is known as,
A. Vapour
B. Perfect gas
C. Steam
D. Air

21. The amount of heat required to raise the temperature of..... Water through 1 degree is called kilojoule.
A. 1g
B. 10g
C. 100g
D. 1000g

22. The free expansion is.... Non flow process.
A. Reversible
B. Irreversible

23. The isothermal and isentropic process are reversible non flow process.
A. Agree
B. Disagree

24. The gas constant (R) is equal to the...
A. Sum of two specific heat
B. Difference of two specific heat
C. Product of two specific heat
D. Ratio of specific heat

25. The value of CP/CV for air is..
A. 1
B. 1.4
C. 1.8
D. 2.4

Here we concluding, If you have any queries about this topic then feel free to comment below.

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