34 ac

he ASHRAE standard that is used to determine acceptable indoor air quality is a. ASHRAE Standard 13.1. b. ASHRAE Standard 5.1. c. ASHRAE Standard 62.1. d. ASHRAE Standard 26.1.

ASHRAE Standard 62.1.

Dust mites and mold fall under which classification? a. Biological contaminants b. Herbicidal contaminants c. Metallic contaminants d. Inorganic contaminants

Biological contaminants

Air cleaning systems that utilize ultraviolet light target which type of UV? a. UV-B b. UV-A c. UV-D d. UV-C

UV-C

A fiber found in older pipe and furnace insulation materials, shingles, textured paints, and floor tiles that is dangerous and may cause lung cancer is ________. a. lead b. asbestos c. formaldehyde d. pesticides

asbestos

When the relative humidity goes above 60%, ___________. a. bacteria, viruses, fungi and other organisms become more active b. furniture joints and floors may loosen and creak c. nasal and throat passages dry out d. static electricity in the air can cause small electric shocks

bacteria, viruses, fungi and other organisms become more active

Pleated filters are desirable because they a. have greater surface area than non-pleated filters. b. are far less expensive than non-pleated filters. c. are self-cleaning. d. can be installed in any direction.

have greater surface area than non-pleated filters.

Care should be taken when handling UV lamps because they contain a. acid. b. cyanide. c. mercury. d. sulfur dioxide

mercury.

The term used to express the amount of moisture in the air compared to the amount of moisture it can hold at a specific temperature is called __________. a. relative humidity b. water vapor c. latent heat d. absolute humidity

relative humidity

To help keep the entire return duct clean and dirt free, a. the air filter should be as close to the air handler as possible. b. the air filter should be as far from the air handler as possible. c. the air filter should be smaller than the filter rack. d. the air filter should be larger than the filter rack.

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

Which of the following is generally true regarding the amount of time people spend indoors and outdoors? a. People spend as much as 90% of their time indoors b. People spend as much as 60% of their time indoors c. People spend as much as 60% of their time outdoors

People spend as much as 90% of their time indoors

Which part of the electronic air cleaner is responsible for charging the dust and dirt particles? a. The post-filter b. The prefilter c. The ionizing section d. The collection plate

The ionizing section

What is the driving force that moves air through a bypass humidifier? a. The blower in the air handler or furnace b. The forward-curved centrifugal blower in the humidifier c. The pressure difference between the supply and return airstreams d. The propeller-type fan in the humidifier

The pressure difference between the supply and return airstreams

Which of the following is true regarding mold? a. Living and dead molds can cause human health problems. b. Only living molds can cause human health problems. c. Molds grow only on surfaces that are visible to the naked eye. d. Oversized air-conditioning system help prevent mold growth.

Living and dead molds can cause human health problems.

Ion generators are used to promote clean environments by causing contaminants to a. bond to each other, making them larger and easier to capture in air filters. b. stick to the interior surfaces of the return duct, removing them from the airstream. c. disintegrate, reducing their ability to negatively affect indoor air quality. d. repel each other, making them easier to capture in air filters.

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

The main drawback of using a high MERV filter is that a. the pressure drop across them is too high. b. they can cause system evaporator pressure to rise. c. the airflow through them will be higher than desired. d. they can cause system condenser pressure to rise

he pressure drop across them is too high.

he plenum-mount humidifier is mounted a. only in the supply plenum. b. only in the return plenum. c. in either the supply plenum or the return plenum. d. in neither the supply plenum nor the return plenum.

in either the supply plenum or the return plenum.

Carbon monoxide is commonly formed when a. a carbon dioxide molecule gains an additional oxygen atom. b. complete combustion takes place. c. incomplete combustion takes place. d. an ozone molecule looses an electron.

incomplete combustion takes place.

The main difference between an HRV and an ERV is that a. an HRV has the ability to recover both latent and sensible heat. b. an HRV has the ability to recover only latent heat. c. an ERV has the ability to recover both latent and sensible heat. d. an ERV has the ability to recover only sensible heat.

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

The effects of tight building construction can be offset by a. utilizing self-contained humidifiers. b. installing additional weather-stripping. c. providing mechanical ventilation. d. keeping all interior doors open.

providing mechanical ventilation.

A heat recovery ventilator transfers a. latent heat from the intake air to the exhaust air in the cooling mode. b. sensible heat from the intake air to the exhaust air in the cooling mode. c. latent heat from the exhaust air to the intake air in the cooling mode. d. sensible heat from the exhaust air to the intake air in the cooling mode

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

Pollutants released from combustion appliances include nitrogen dioxide and sulfur dioxide. a. True b. False

true

The most common source of radon is a. plutonium. b. cranium. c. germanium. d. urauranium

urauranium

How many compounds are found in tobacco smoke? a. 200 to 500 b. 700 to 900 c. 0 to 100 d. Over 1000

Over 1000

Two types of atomizing humidifiers are the spray-nozzle and the evaporative. a. True b. False

false

___________ is the process of supplying air by natural or mechanical means to a space. a. ventilation b. filtration c. infiltration d. decontamination

ventilation

A type of filter that is capable of capturing particles as small as .3 microns is a ________. a. cube filter b. pleated filter c. pocket filter d. HEPA filter

. HEPA filter

All of the following should be taken into account when sizing humidifiers except a. volume of the structure. b. desired indoor air temperature. c. the number of air changes per hour in the structure. d. building construction.

. desired indoor air temperature.

HEPA filters can capture particles in the air that are as small as a. 3 microns in size. b. 0.3 microns in size. c. 300 microns in size. d. 30 microns in size.

0.3 microns in size.

The efficiency of a MERV 7 filter is approximately a. 7%. b. 70%. c. 50%. d. 30%.

30%.

Check My Work The recommended relative humidity for a home is between a. 50% and 70%. b. 40% and 60%. c. 20% and 40%. d. 30% and 50%

40% and 60%.

Death from carbon monoxide can result if continued exposure exceeds a. 800 parts per million. b. 800 parts per billion. c. 200 parts per million. d. 200 parts per billion.

800 parts per million.

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? a. Poor filter quality/application b. Air leaks in the supply duct c. Air leaks in the return duct d. Improperly sized filter

Air leaks in the supply duct

Of the following, which groups of individuals are most likely to suffer from poor indoor air quality related illnesses? a. Chronically ill people and the elderly b. The elderly and construction workers c. Athletes and infants d. Construction workers and infants

Chronically ill people and the elderly

Asbestos is known to cause which of the following health problems? a. Diabetes b. High blood pressure c. Lung cancer d. Skin cancer

Lung cancer

The filter type that is best-suited for high humidity applications is the a. cube filter. b. high-loft polyester filter. c. HEPA filter. d. pocket filter.

cube filter.

An electronic precipitator is the same as a(n) a. electronic air cleaner. b. washable steel air filter. c. extended surface air filter. d. fiberglass media filter.

electronic air cleaner.

With regards to air filtration, the term face-loading occurs when the a. front side of the filter becomes clogged with dirt. b. dirt bypasses the filter and clogs the evaporator coil. c. back side of the filter becomes clogged with dirt. d. filter is installed with the arrow pointing in the wrong direction

front side of the filter becomes clogged with dirt.

Generally speaking, ventilation has a a. negative effect on the efficiency of cooling systems. b. positive effect on the efficiency of heating systems. c. negative effect on the efficiency of both heating and cooling systems. d. positive effect on the efficiency of both heating and cooling systems.

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

All of the following are methods used to control indoor contamination except a. removing the source of contamination. b. providing adequate ventilation. c. cleaning the air. d. sealing all leaks in the building envelope.

sealing all leaks in the building envelope.

Sick Building Syndrome is a blanket term used to describe a. the cause for health problems associated with poor indoor air quality. b. a building that is being operated/managed without a certificate of occupancy. c. a building that has experienced severe damage to its thermal envelope. d. the effect that results when sick people transmit their illnesses to others.

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

In the winter months, humidification is often needed because a. the relative humidity of air decreases as it is heated. b. high levels of humidity will make the occupants of the space colder. c. the absolute humidity of the air increases as it is heated. d. the heating system removes moisture from the air in the heated space.

the relative humidity of air decreases as it is heated.

The "V" in a filter's MERV rating stands for a. viscosity. b. value. c. volume. d. velocity.

value.

For which level of mold contamination are trained maintenance staff members permitted to perform mold cleanups? a. Level III only b. Level I and Level II c. Level III and Level IV d. Level I only

Level I and Level II

For which level of mold contamination must individuals performing the remediation be trained in the handling of hazardous materials? a. Level III and Level IV b. Level I and Level II c. Level I only d. Level III only

Level III and Level IV