Unit 34 Test and Quiz Review
B
A fiber found in older pipe and furnace materials, shingles, textured paints, and floor tiles that is dangerous and may cause lung cancer is __________________. A. lead B. asbestos C. formaldehyde D. pesticides
A
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
A
Dust mites and mold fall under which classification? A. Biological contaminants B. Inorganic contaminants C. Metallic contaminants D. Herbicidal contaminants
C
A heat recovery ventilator transfers A. latent heat from the intake air to the exhaust air in the cooling mode B. latent heat from the exhaust air to the intake air in the cooling mode C. sensible heat from the intake air to the exhaust air in the cooling mode D. sensible heat from the exhaust air to the intake air in the cooling mode
B
A poisonous, lighter-than-air, colorless, odorless gas that is produced by incomplete combustion is ___________________. A. carbon dioxide (CO2) B. carbon monoxide (CO) C. methane D. environmental tobacco smoke (ETS)
B
A type of filter that is capable of capturing particles as small as .3 microns is a _____________________ A. cube filter B. HEPA filter C. pocket filter D. pleated filter
C
Air cleaning systems that utilize ultraviolet light target which type of UV? A. UV-A B. UV-B C. UV-C D. UV-D
D
All of the following are methods used to control indoor contamination except A. cleaning air B. removing the source of contamination C. providing adequate ventilation D. sealing al leaks in the building envelope
C
All of the following should be taken into account when sizing humidifiers except A. volume of the structure B. building construction C. desired indoor air temperature D. the number of air changes per hour in the structure
C
An electronic precipitator is the same as a (n) A. extended surface air filter B. fiberglass media filter C. electronic air cleaner D. washable steel air filter
C
Asbestos is known to cause which of the following health problems? A. High blood pressure B. Diabetes C. Lung cancer D. Skin cancer
A
Carbon monoxide is commonly formed when A. incomplete combustion takes place B. a carbon dioxide molecule gains an additional oxygen atom C. an ozone molecule looses and electron D. complete combustion takes place
B
Care should be taken when handling UV lamps because they contain A. cyanide B. mercury C. acid D. sulfur dioxide
B
For which level of mold contamination are trained maintenance staff members permitted to perform mold cleanups? A. Level I only B. Level I and Level II C. Level III only D. Level III and Level IV
D
For which level of mold contamination must individuals performing the remediation be trained in the handling of hazardous materials A. Level I only B. Level I and Level II C. Level III D. Level III and Level IV
D
Generally speaking, ventilation has a A. positive effect on the efficiency of heating systems B. positive effect on the efficiency of both heating and cooling systems C. negative effect on the efficiency of cooling systems D. negative effect on the efficiency of both heating and cooling systems
A
HEPA filters can capture particles in the air that are as small as A. 0.3 microns in size B. 3 microns in size C. 30 microns in size D. 300 microns in size
D
How many compounds are found in tobacco smoke? A. 0 to 100 B. 200 to 500 C. 700 to 900 D. Over 1000
B
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. Air leaks in the return duct B. Air leaks in the supply duct C. Improperly sized filter D. Poor filter quality/application
C
In the winter months, humidification is often needed because A. the heating system removes moisture from the air in the heated space B. high levels of humidity will make the occupants of the space colder C. the relative humidity of air decreases as it is heated D. the absolute humidity of the air increase as it is heated
A
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. repel each other, making them easier to capture in air filters C. stick to the interior surfaces of the return duct, removing them from the airstream D. disintegrate, reducing their ability to negatively affect indoor air quality
B
Of the following, which groups of individuals are most likely to suffer from poor indoor air quality related illnesses? A. Athletes and infants B. Chronically ill people and elderly C. The elderly and construction workers D. Construction workers and infants
B
Pleated filters are desirable because they A. are self-cleaning B. have greater surface area than non-pleated filters C. are far less expensive than non-pleated filters D. can be installed in any direction
True
Pollutants released from combustion appliances include nitrogen dioxide and sulfur dioxide True or False
C
Sick Building Syndrome is a blanket term used to describe A. a building that has experienced severe damage to its thermal envelope B. a building that is being operated/managed without a certificate of occupancy C. the cause for health problems associated with poor indoor air quality D. the effect that results when sick people transmit their illnesses to others
True
Sick building syndrome is a term given to situations when people who spend considerable time in a particular building experience health problems True or False
A
The "V" in a filter's MERV rating stands for A. value B. velocity C. viscosity D. volume
D
The ASHRAE standard that is used to determine acceptable indoor air quality is A. ASHRAE Standard 5.1 B. ASHRAE Standard 13.1 C. ASHRAE Standard 26.1 D. ASHRAE Standard 62.1
B
The effects of tight building construction can be offset by A. installing additional weather-stripping B. providing mechanical ventilation C. utilizing self-contained humidifiers D. keeping all interior doors open
B
The efficiency of a MERV 7 filter is approximately A. 7% B. 30% C. 50% D. 70%
D
The filter type that is best-suited for high humidity applications is the A. pocket filter B. HEPA filter C. high-loft polyester filter D. cube filter
B
The main difference between an HRV and ERV is that A. an HRV has the ability to recover both latent and sensible heat B. an ERV has the ability to recover both latent and sensible heat C. an HRV has the ability to recover only latent heat D. an ERV has the ability to recover only sensible heat
B
The main drawback of using a high MERV filter is that A. they can cause system condenser pressure to rise B. the pressure drop across them is too high C. they can cause system evaporator pressure to rise D. the airflow through them will be higher than desired
B
The most common source of radon is A. plutonium B. uranium C. germanium D. cranium
C
The 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
D
The recommended relative humidity for a home is between A. 50% and 70% B. 20% and 40% C. 30% and 50% D. 40% and 60%
D
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. absolute humidity B. latent heat C. water vapor D. relative humidity
B
To help keep the entire return duct clean and dirt free, A. the air filter should be as close from 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
False
Two types of atomizing humidifiers are the spray-nozzle and the evaporative True or False
A
What is the driving force that moves air through a bypass humidifier? A. The pressure difference between the supply and return airstreams B. The propeller-type fan in the humidifier C. The forward-curved centrifugal blower in the humidifier D. The blower in the air handler or furnace
C
When the relative humidity goes above 60%, ___________________. A. nasal and throat passages dry out B. static electricity in the air can cause small electric shocks C. bacteria, viruses, fungi and other organisms become more active D. furniture joints and floors may loosen and creak
A
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 90% of their time outdoors D. People spend as much as 60% of their time outdoors
B
Which of the following is true regarding mold? A. Only living molds can cause human health problems B. Living and dead molds can cause human health problems C. Oversized air-conditioning system help prevent mold growth D. Molds grow only on surfaces that are visible to the naked eye
C
Which part of the electronic air cleaner is responsible for charging the dust and dirt particles? A. The prefilter B. The post-filter C. The ionizing section D. The collection plate
C
With regards to air filtration, the term face-loading occurs when the A. back side of the filter becomes clogged with dirt B. filter is installed with the arrow pointing in the wrong direction C. front side of the filter becomes clogged with dirt D. dirt bypasses the filter and clogs the evaporator coil
C
_____________________ is a fungus that releases it spores, which can be harmful to humans, into the air and is usually found in areas of high humidity A. Radon B. Asbestos C. Mold D. Dust Mites
C
______________________ is the process of supplying air by natural or mechanical means to a space A. decontamination B. filtration C. ventilation D. infiltration
