Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. The evaporation process is a
a. constant volume reversible process
b. constant pressure reversible process
c. adiabatic throttling process
d. reversible adiabatic process
Q. In the expansion process, which of the following remains constant?
a. work done
b. heat supplied
c. internal energy
d. enthalpy
Q. The COP of cycle is given by(Q2=heat absorbed by evaporator and Wc=work done by compressor)
a. 1- (q2/wc)
b. 1- (wc/q2)
c. q2/wc
d. wc/q2
Q. Which of the following is recommended in a refrigeration cycle?
a. superheating of vapour
b. subcooling of liquid
c. both of the mentioned
d. none of the mentioned
Q. A condenser must and then the compressed refrigerant.
a. superheat, evaporate
b. desuperheat, evaporate
c. superheat, condense
d. desuperheat, condense
Q. In absorption refrigeration cycle, which of the following is used?
a. refrigerant
b. absorbent
c. both of the mentioned
d. none of the mentioned
Q. In the aqua-ammonia absorption system,
a. water is the refrigerant and ammonia is the absorbent
b. ammonia is the refrigerant and water is the absorbent
c. both ammonia and water can be used as refrigerant or absorbent
d. none of the mentioned
Q. Which of the following statement is true?
a. ammonia vapour is absorbed in water
b. boiling point of ammonia is more than that of water
c. both of the mentioned
d. none of the mentioned
Q. Which of the following condenses first?
a. ammonia vapour
b. water vapour
c. both condense at same temperature
d. none of the mentioned
Q. The vapour going to condenser is in temperature and in ammonia.
a. higher, less
b. higher, richer
c. lower, less
d. lower, richer