RSES Code Compliance 5

Question 1

Under UL 984 and ASHRAE 15, where must pressure relief device discharge outlets be piped to on systems using toxic refrigerants?

Accepted Answer

To a purge unit or treatment system

Answer

Toxic refrigerant relief outlets must discharge to a treatment or recovery system rather than the atmosphere or occupied spaces.

Question 2

When is a hydrostatic pressure test specifically prohibited on a refrigeration system under ASHRAE 15?

Accepted Answer

When moisture contamination from water could damage the system or create hazards

Answer

Hydrostatic testing is prohibited when water contamination would create safety hazards or damage system components, such as in systems using refrigerants that react with water.

Question 3

What must a technician do if they purchase more than 2 lbs of a non-exempt refrigerant in a container for resale?

Accepted Answer

Hold a valid EPA Section 608 certification and only sell to certified technicians

Answer

EPA rules require that refrigerant sold in containers over 2 lbs can only be purchased by and sold to EPA Section 608 certified technicians.

Question 4

What is the code-required color for refrigerant piping carrying R-717 (ammonia) per IIAR standards?

Accepted Answer

Yellow

Answer

IIAR (International Institute of Ammonia Refrigeration) standards require ammonia refrigerant piping to be painted yellow for identification.

Question 5

Under EPA regulations, what is the allowable leak rate trigger for industrial process refrigeration equipment with over 50 lbs of charge before repair is required?

Accepted Answer

30% per year

Answer

Industrial process refrigeration with more than 50 lbs of refrigerant must be repaired if the annual leak rate exceeds 30%, a higher threshold than commercial refrigeration.

(RSES) Refrigeration Service Engineers Society Certification Practice Test

(RSES) Refrigeration Service Engineers Society Certification Practice Test

RSES Code Compliance 5