RSES Installation, Maintenance & Repair Procedures

Question 1

Why is vacuuming the system important before charging refrigerant?

Accepted Answer

Eliminates moisture and air

Answer

Vacuuming the refrigeration system before charging with refrigerant is a critical step to eliminate non-condensable gases, primarily moisture and air. Moisture can freeze and cause blockages, leading to system failure, while air increases discharge pressure and reduces efficiency. A deep vacuum ensures a clean, dry system, allowing the refrigerant to operate optimally.

Question 2

What is the purpose of leak testing during installation?

Accepted Answer

To detect refrigerant leaks

Answer

To identify and fix any refrigerant leaks for safe operation.

Question 3

Which tool is commonly used for brazing refrigerant lines?

Accepted Answer

Oxy-acetylene torch

Answer

An oxy-acetylene torch is used to weld or braze copper tubing.

Question 4

What routine maintenance is required for air filters?

Accepted Answer

Replace or clean periodically

Answer

They should be cleaned or replaced regularly to ensure airflow.

Question 5

How should refrigerant be recovered during repairs?

Accepted Answer

Use recovery machine

Answer

Use certified recovery equipment to prevent environmental damage.

(RSES) Refrigeration Service Engineers Society Certification Practice Test

(RSES) Refrigeration Service Engineers Society Certification Practice Test

RSES Installation, Maintenance & Repair Procedures