FREE Refrigeration System Repair Question and Answers

Question 1

The cause of sporadic AC cooling is being identified.
Both the high side and low side pressure gauge readings are displayed intermittently on the gauge set, and the high side occasionally decreases below 100 psi.
What is the MOST likely reason for the following?

Accepted Answer

Stuck expansion valve

Answer

Overcharged A/C System

Answer

Compressor internal leak

Answer

Damaged compressor reed valve

Question 2

What happens in an evaporator in a cooling and refrigeration system?

Accepted Answer

The refrigerant absorbs the latent heat

Answer

The refrigerant evaporates latent heat.

Answer

Latent heat is condensed

Answer

Latent heat is released.

Question 3

The following statements about a receiver/dryer are all true, EXCEPT:

Accepted Answer

Evacuating system removes moisture from a saturated receiver/dryer

Answer

Clogged filter can cause higher than normal pressure

Answer

Saturated desiccant can cause a blockage due to freezing

Answer

You install a new desiccant bag on some systems before charging the system.

Question 4

What happens in a condenser in a cooling and refrigeration system?

Accepted Answer

The refrigerant releases the latent heat.

Answer

Latent heat is increased

Answer

The refrigerant absorbs the latent heat.

Answer

Latent heat is pressurized.

Question 5

According to technician A, a gasket or O-ring is used to seal the system at every air conditioning connection. According to Technician B, lubricating the O-ring with the appropriate refrigerant oil before replacing it would help prevent nicks and make installation easier. Who is correct?

Accepted Answer

Both Technician A and B

Answer

Technician B only

Answer

Technician A only

Answer

Neither Technician A nor B

Question 6

Which of the following doesn't fit the definition of a compressor?

Accepted Answer

Lateral

Answer

Rotary

Answer

Screw

Answer

Reciprocating

Question 7

The term EXCEPT appears in this query. Find the response to this question that CANNOT result in the specified circumstance. Before selecting an answer, thoroughly read the entire question. Regarding the expansion valve, EVERYTHING IS TRUE, EXCEPT FOR

Accepted Answer

When stuck closed, pressure on high side is low and pressure on low side is high.

Answer

It can fail in the open position as a result of debris in the system.

Answer

With moisture in the system, ice can form and cause blockage

Answer

It can seize in the closed position due to a lack of lubricant.

The cause of sporadic AC cooling is being identified.Both the high side and low side pressure gauge readings are displayed intermittently on the gauge set, and the high side occasionally decreases below 100 psi.What is the MOST likely reason for the following?

The cause of sporadic AC cooling is being identified.
Both the high side and low side pressure gauge readings are displayed intermittently on the gauge set, and the high side occasionally decreases below 100 psi.
What is the MOST likely reason for the following?