Hotel Service Unit 11 Q3 Quiz

Correct Answer:
B) Use a vacuum pump to evacuate moisture and install a dehydrator or filter-drier

Explanation:
A vacuum pump removes moisture from the system, and a dehydrator or filter-drier helps to capture any residual moisture, preventing future issues like ice blockages in the expansion valve.

Correct Answer:
B) Formation of ice blockages in the expansion valve or capillary tubes

Explanation:
Moisture can freeze in the expansion valve or capillary tubes, forming ice blockages that restrict refrigerant flow and reduce cooling efficiency. This blockage can eventually halt the cooling process altogether.

Correct Answer:
B) Purge the system to remove air from the refrigerant lines

Explanation:
Purge systems or vacuum pumps are used to remove air from the refrigeration lines, restoring normal operating pressures and improving system efficiency by eliminating unnecessary heat in the condenser.

Correct Answer:
C) Increased system pressure and higher condenser temperature

Explanation:
Air trapped in the refrigeration system can increase system pressure and lead to elevated temperatures in the condenser, reducing the overall efficiency of the cooling process and causing additional strain on the compressor.

Correct Answer:
B) Add the required amount of refrigerant to restore the proper charge

Explanation:
Recharging the system with the correct amount of refrigerant ensures optimal cooling performance and protects the compressor from overheating, maintaining efficient operation.

Correct Answer:
B) Reduced cooling capacity and possible compressor overheating

Explanation:
An undercharge of refrigerant results in insufficient cooling capacity, causing the compressor to work harder and potentially overheat due to the lower volume of refrigerant needed to absorb and carry away heat.