Top 250+ Solved Refrigeration and Air conditioning MCQ Questions Answer
Q. The refrigerant with highest critical pressure is
a. Carbon dioxide
b. Ammonia
c. Freon-11
d. Freon-22
Q. The Refrigerant commonly used in commercial ice plants is
a. Carbon-dioxide
b. Air
c. Ammonia
d. Freon-12
Q. Which of the following refrigerants has the lowest boiling point?
a. Freon-12
b. Carbon-dioxide
c. Ammonia
d. Sulphur dioxide
Q. In a flooded type of Evaporator which of the following types of expansion device is utilized
a. Float Valve
b. Thermostatic device
c. Capillary tube
d. Self actuated expansion valve
Q. Which of the following statements are TRUE?
a. A capillary tube is a variable opening area type expansion device
b. In a capillary tube pressure drop takes place due to fluid friction
c. In a capillary tube pressure drop takes place due to fluid acceleration
d. In a capillary tube pressure drop takes place due to fluid friction and acceleration
Q. Co-efficient of performance of vapour absorption refrigeration system as compared to that for vapour compression refrigeration system is
a. more
b. less
c. may be more or less
d. un - predictable
Q. The function of compressor in vapour compression refrigeration system is performed in vapour absorption system by
a. generator
b. absorber
c. generator, absorber and liquid pump
d. absorber and liquid pump
Q. Electrolux system of refrigeration has
a. only one liquid pump
b. only two liquid pumps
c. no liquid pump
d. none of the above
Q. Electrolux refrigerators has the following working substances
a. Hydrogen
b. Ammonia and Hydrogen
c. Ammonia and water
d. Ammonia, hydrogen and water
Q. Which of the following system can be called as mechanical system of refrigeration
a. Vapour absorption system
b. Vapour compression system
c. Steam jet refrigeration system
d. None of the above
Q. The vapour absorption refrigeration system using Ammonia – water has cycle operating pressures
a. higher than that using Lithium Bromide – water
b. lower than that using Lithium Bromide – water
c. may be higher or lower depending upon application
d. higher for sub-zero application and lower for above zero application
Q. Shaft work required for vapour absorption system to produce 1 ton refrigeration may be only
a. 50 to 60% of that required for vapour compression system
b. 20 to 30% of that required for vapour compression system
c. 1 to 2% of that required for vapour compression system
d. none of the above
Q. Work of compression of the fluid in vapour absorption refrigeration system as compared to that for vapour compression refrigeration system is
a. les
b. more
c. may be more or less
d. un - predictable
Q. Munters Platen system of refrigeration is
a. Vapour absorption system with ammonia and water
b. Vapour compression system with ammonia as working substance
c. Electrolux system with Hydrogen, ammonia and water as working substances
d. none of the above