MCQ'S BASED ON THE FIRST LAW OF THERMODYNAMICS
Hi guys, hope you are all safe and healthy. Here are some of the multiple-choice questions on the first law of thermodynamics which might be useful for revising your understanding of the first law of thermodynamics. The maximum of the questions is of basic level which will provide a clear and solid foundation on the first law of thermodynamics.
MULTIPLE-CHOICE QUESTIONS WITH ANSWERS
1) The area under the curve of the P-V diagram equal to
A) Work done
B) Heat transfer
C) Enthalpy
D) None of the above
ANSWER-: A) Work done
2) The area under the curve of T-S diagram equal to
A) Work done
B) Heat transfer
C) Enthalpy
D) None of the above
ANSWER-: B) Heat transfer
3) Internal energy is a
A) Path function
B) Point function
C) Both path and point function
D) None of the above
ANSWER-: B) Point function
4) It is a Device used to measure relatively high temperatures
A) Thermometers
B) Pyrometer
C) Thermocouple
D) None of the above
ANSWER-: B) Pyrometer
5) An equilibrium state between solid, liquid, and gases phases of substance is known as
A) Critical temperature
B) Triple point
C) Saturation temperature
D) Latent heat
ANSWER-: B) Triple point
6) No heat input but mechanical energy is continuously supplying is called
A) Perpetual motion kind 1
B) Perpetual motion kind 2
C) Perpetual motion kind 3
D) Kelvin plank statement
ANSWER-: A) Perpetual motion kind 1
7) For the isobaric process polytopic index “n” value is
A) 0
B) Infinity
C) 1
D) None of the above
ANSWER-: A) 0
8) Which law states that at constant volume the pressure is directly proportional to the temperature of the gas
A) Joules law
B) Boyle’s law
C) Gay-Lussac’s law
D) Third law of thermodynamics
ANSWER-: C) Gay-Lussac’s law
9) Heat engine is a good example for
A) First law of thermodynamics
B) Second law of thermodynamics
C) Third law of thermodynamics
D) Perpetual motion kind 2
ANSWER-: A) First law of thermodynamics
10) Entropy is a
A) Path function, intensive property
B) Point function, extensive property
C) Path function, extensive property
D) Point function, intensive property
ANSWER-: B) Point function, extensive property
11) Under
what condition work done is equal to ∫12 pdV
A) Constant volume
B) Constant pressure
C) Polytropic process
D) Adiabatic process
ANSWER-: B)
Constant pressure
12)
What are adiabatic and diathermic walls?
A) Allows heat exchange, does not
allow heat exchange
B) Does not allow heat exchange,
allows heat exchange
C) Both the walls allow heat to be
exchange
D) Both the walls do not allow heat
to be exchanged
ANSWER-: B) Does not allow heat exchange, allows heat exchange