Vapour Compression Refrigeration System Quiz

What is the main function of a Vapour Compression Refrigeration System (VCRS)?

• To absorb heat from a high temperature region

• To compress air for cooling

• To release heat to a low temperature region

• To absorb heat from a low temperature region

Which of the following is NOT a basic component of a simple vapour compression refrigeration system?

• Condenser

• Expansion valve

• Heat exchanger

• Compressor

During which process does the refrigerant change from vapour to liquid?

• Compression

• Evaporation

• Expansion

• Condensation

What happens to the refrigerant during the expansion process?

• It absorbs heat

• It becomes superheated

• It releases heat

• Its pressure and temperature decrease

What is the refrigerating effect in a VCRS?

• Heat absorbed during evaporation

• Heat rejected during compression

• Heat released during expansion

• Heat absorbed during condensation

What does the Coefficient of Performance (COP) measure in a refrigeration system?

• The ratio of refrigerating effect to work done

• The efficiency of the compressor

• The temperature difference between evaporator and condenser

• The amount of heat rejected

What is the effect of decreasing suction pressure on the refrigerating effect?

• It remains the same

• It doubles

• It increases

• It decreases

Which of the following describes superheating in a refrigeration system?

• Converting liquid refrigerant to vapour

• Cooling the refrigerant below its saturation temperature

• Absorbing heat from the environment

• Increasing the temperature of the refrigerant vapour above its saturation temperature

What is the primary purpose of an accumulator in a refrigeration system?

• To increase the pressure of the refrigerant

• To prevent liquid refrigerant from entering the compressor

• To store excess refrigerant permanently

• To enhance the cooling effect

Which of the following is a disadvantage of Vapour Compression Refrigeration Systems (VCRS) compared to Air Refrigeration Systems?

• Lower power consumption

• Higher maintenance requirements

• Lower initial cost

• Higher coefficient of performance