Chapter 34 Review Questions

For which level of mold contamination must individuals performing the remediation be trained in the handling of hazardous materials?

Level III and Level IV

If an air filter is installed in a ceiling-mounted return grille and the evaporator coil is dirty, which of the following is not a possible cause?

air leaks in the supply duct

The main difference between an HRV and an ERV is that

an ERV has the ability to recover both latent and sensible heat.

Pleated filters are desirable because they

have greater surface area than non-pleated filters.

Generally speaking, ventilation has a

negative effect on the efficiency of both heating and cooling systems.

How many compounds are found in tobacco smoke?

over 1,000 (4,000)

All of the following are methods used to control indoor contamination except

sealing all leaks in the building envelope.

The ASHRAE standard that is used to determine acceptable indoor air quality is

ASHRAE Standard 62.1.

Air cleaning systems that utilize ultraviolet light target which type of UV?

UV-C

Dust mites and mold fall under which classification?

biological contaminants

Ion generators are used to promote clean environments by causing contaminants to

bond to each other, making them larger and easier to capture in air filters.

All of the following should be taken into account when sizing humidifiers except

desired indoor air temperature.

An electronic precipitator is the same as a(n)

electronic air cleaner.

With regards to air filtration, the term face-loading occurs when the

front side of the filter becomes clogged with dirt.

The plenum-mount humidifier is mounted

in either the supply plenum or the return plenum.

Carbon monoxide is commonly formed when

incomplete combustion takes place.

Asbestos is known to cause which of the following health problems?

lung cancer

Care should be taken when handling UV lamps because they contain

mercury.

Which of the following is generally true regarding the amount of time people spend indoors and outdoors?

people spend as much as 90% of their time outdoors

The effects of tight building construction can be offset by

providing mechanical ventilation.

To help keep the entire return duct clean and dirt free,

the air filter should be as far from the air handler as possible.

Sick Building Syndrome is a blanket term used to describe

the cause for health problems associated with poor indoor air quality.

Which part of the electronic air cleaner is responsible for charging the dust and dirt particles?

the ionizing section

What is the driving force that moves air through a bypass humidifier?

the pressure difference between the supply and return airstreams

Death from carbon monoxide can result if continued exposure exceeds

800 parts per million.

The filter type that is best-suited for high humidity applications is the

cube filter.

The main drawback of using a high MERV filter is that

the pressure drop across them is too high.

HEPA filters can capture particles in the air that are as small as

0.3 microns in size.

The efficiency of a MERV 7 filter is approximately

30%.

The recommended relative humidity for a home is between

40% and 60%.

Of the following, which groups of individuals are most likely to suffer from poor indoor air quality related illnesses?

chronically ill people and the elderly

A heat recovery ventilator transfers

sensible heat from the intake air to the exhaust air in the cooling mode.

In the winter months, humidification is often needed because

the relative humidity of air decreases as it is heated.

The most common source of radon is

uranium.

The "V" in a filter's MERV rating stands for

value.

For which level of mold contamination are trained maintenance staff members permitted to perform mold cleanups?

Level I and Level II

Which of the following is true regarding mold?

Living and dead molds can cause human health problems.