HVAC Code Compliance 5

Question 1

Per the International Mechanical Code, what is the minimum slope required for a horizontal condensate drain line?

Accepted Answer

1/4 inch per foot

Answer

The IMC requires condensate drain lines to slope a minimum of 1/8 inch per foot toward the point of discharge, though 1/4 inch per foot is commonly specified and preferred.

Question 2

Under EPA Section 608, technicians who purchase containers of refrigerant in amounts greater than 2 lbs must be certified. Which certification level covers small appliances only?

Accepted Answer

Type I

Answer

EPA Section 608 Type I certification is required for technicians servicing small appliances containing 5 lbs or less of refrigerant, such as household refrigerators and window ACs.

Question 3

According to the International Residential Code, what is the minimum size (in square inches of free area) for each combustion air opening serving a confined space with fuel-burning appliances?

Accepted Answer

The size is based on BTU input, not a fixed minimum

Answer

The IRC and IFGC size combustion air openings based on the BTU/hr input of the appliances rather than specifying a single fixed minimum area.

Question 4

When refrigerant is reclaimed and sent to a reclaim facility, what standard must the reclaimed refrigerant meet before it can be resold?

Accepted Answer

AHRI 700

Answer

Reclaimed refrigerant must meet AHRI Standard 700 purity specifications before it can be resold for use in refrigeration and air conditioning equipment.

Question 5

Per the International Mechanical Code, what type of pipe material is NOT approved for use in refrigerant piping systems using HFC refrigerants?

Accepted Answer

Black iron pipe

Answer

Black iron (steel) pipe is not approved for HFC refrigerant systems because it can corrode with moisture and is incompatible with the lubricants used in modern refrigeration systems.

HVAC Practice Test

HVAC Practice Test

HVAC Code Compliance 5