Free IICRC WRT Water Categories and Classification Questions and Answers

Question 1

According to the IICRC S500 standard, a water loss originating from a washing machine discharge line is best classified as which category of water?

Accepted Answer

Category 2

Answer

Category 2 water contains significant contamination and has the potential to cause discomfort or sickness. Sources include discharge from dishwashers or washing machines.

Question 2

A technician is assessing a water loss that affects an entire room of carpet and pad, with water wicked up the drywall approximately 18 inches. Which IICRC Class of water best describes this scenario?

Accepted Answer

Class 2

Answer

Class 2 water losses affect at least an entire room of carpet and cushion and involve moisture wicking up walls less than 24 inches. This class has a large amount of water, absorption, and evaporation.

Question 3

Which of the following events would automatically be classified as a Category 3 water loss, regardless of the water's appearance?

Accepted Answer

A sewer backflow that originates from beyond the toilet trap.

Answer

The IICRC S500 standard defines all toilet backflows originating from beyond the trap as Category 3, which is grossly contaminated, regardless of visible content or color.

Question 4

A water loss began as a clean supply line break (Category 1). However, it was not discovered for over 48 hours, and the water is now at room temperature. According to the IICRC S500, what is the most likely change to its classification?

Accepted Answer

It can deteriorate to Category 2 or Category 3.

Answer

The IICRC S500 states that time and temperature can affect the quality of water. Category 1 water can deteriorate to Category 2 or 3 after it contacts other surfaces and is allowed to sit for a period, typically over 48 hours, allowing for microbial growth.

Question 5

A water damage project involves deeply saturated hardwood flooring and plaster walls. These materials have very low porosity and permeance. This situation is best described as which Class of water?

Accepted Answer

Class 4

Answer

Class 4 water losses are specialty drying situations that involve wet materials with very low permeance/porosity, such as hardwood, plaster, brick, and concrete. These require special methods and longer drying times.

IICRC WRT - Institute of Inspection, Cleaning and Restoration Certification Water Damage Restoration Technician Practice Test

IICRC WRT - Institute of Inspection, Cleaning and Restoration Certification Water Damage Restoration Technician Practice Test

Free IICRC WRT Water Categories and Classification Questions and Answers