CBD Ventilation & Mechanical Systems 2

Question 1

A continuous ventilation strategy for a bathroom, per ASHRAE 62.2, requires a minimum exhaust rate of:

Accepted Answer

20 CFM

Answer

ASHRAE 62.2 allows continuous bathroom ventilation at a reduced rate of 20 CFM, which is lower than the 50 CFM required for intermittent operation.

Question 2

Which type of radiant floor heating system circulates heated water through tubing embedded in or beneath the floor?

Accepted Answer

Hydronic radiant heating

Answer

Hydronic radiant heating uses a boiler or water heater to circulate hot water through PEX or similar tubing beneath the floor, providing efficient, even heat.

Question 3

When installing electric radiant floor heating beneath tile in a bathroom, the thermostat sensor probe should be placed:

Accepted Answer

Between the heating cables in the mortar bed

Answer

The sensor probe must be embedded between heating cables in the mortar bed so it accurately reads floor temperature and prevents overheating.

Question 4

An Energy Recovery Ventilator (ERV) in a bathroom ventilation system offers which primary advantage over a standard exhaust fan?

Accepted Answer

Transfers heat and moisture from exhaust air to incoming fresh air

Answer

An ERV recovers both heat and moisture from outgoing stale air and transfers them to incoming fresh air, improving energy efficiency in climates where humidity balance is important.

Question 5

Backdrafting of combustion appliances near a bathroom can occur when a powerful exhaust fan:

Accepted Answer

Creates negative pressure that reverses combustion gas flow

Answer

High-capacity exhaust fans can depressurize a home, causing combustion appliances to backdraft and pull flue gases back into the living space.

(CBD) Certified Bathroom Designer Practice Test

(CBD) Certified Bathroom Designer Practice Test

CBD Ventilation & Mechanical Systems 2