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

10 CFM

Answer

35 CFM

Answer

50 CFM

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

Electric resistance heating

Answer

Infrared panel heating

Answer

Forced-air radiant heating

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

On top of the heating mat before tile installation

Answer

At the perimeter wall near the floor

Answer

Above the ceiling directly over the heated area

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

Higher CFM output per watt

Answer

Completely eliminates the need for ductwork

Answer

Automatically adjusts to barometric pressure changes

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

Runs at too low a CFM setting

Answer

Overheats and trips its thermal cutout

Answer

Operates on a humidity sensor in a sealed bathroom

Question 6

The National Electrical Code (NEC) requires GFCI protection for all 15- and 20-ampere receptacles in bathrooms within what distance of a sink?

Accepted Answer

All bathroom receptacles regardless of distance

Answer

Within 3 feet only

Answer

Within 6 feet only

Answer

Only receptacles directly above the sink

Question 7

Which exhaust fan installation location is most effective for capturing steam and moisture in a bathroom containing a separate shower and soaking tub?

Accepted Answer

As close to the shower as ceiling framing allows

Answer

Centered on the ceiling between both fixtures

Answer

Directly over the toilet only

Answer

At the bathroom door to exhaust air before it spreads