NCCER INDUSTRIAL EXAM STUDY
GUIDE QUESTIONS AND ANSWERS
multiple chemical sensitivity - Answer-Persons who perceive they are vulnerable to
exposure to certain chemicals and / or combinations of chemicals may suffer from
more susceptible to poor IAQ - Answer-Buildings that have low air - exchange rates are
20 percent - Answer-A building is said to have sick - building syndrome when more than
what percent of its occupants complain during a two - week period of symptoms that are
alleviated when the occupants leave the building ?
occur after a single , high - dose exposure - Answer-Short - term or immediate effects of
human exposure to poor IAQ may
cancer - Answer-Which of the following is a possible long - term effected of exposure to
indoor air pollutants ?
IEQ - Answer-IAQ is an integral part of
prevailing wind conditioned at the site - Answer-To get proper ventilation - damper
building's HVAC equipment , once should consider outside - air duct locations ,
neighboring pollutant orientation and adequate filtration systems into the design of a
new sources and the
Achieving good indoor air quality begins with initial building design , sitting , and
construction - Answer-Which of the following is a true statement ?
1,000 - Answer-A ventilation problem may exist when the carbon dioxide level in a room
exceeds how many parts per million (ppm) ?
soil and rocks - Answer-The most common source of radon is uranium in
sub - slab depressurization - Answer-Which of the following is a common method for
reducing radon in a building ?
the breathing of the building's human occupants - Answer-High levels of carbon dioxide
in a building can result from
properly sealing all ducts during installation - Answer-The best solution to air - duct
leakage problems is
bacteria - Answer-Ultraviolet light is used to control
gaseous vapors - Answer-Activated charcoal filters are used mainly to remove
, If an HVAC contractor detects an IAQ problem during routine maintenance , the
contractor - Answer-Which of the following statements is true ?
replaced - Answer-To control microbial contaminants , water - damaged ceiling tiles
should be
locate outside air intakes away from where motor vehicle emissions collect - Answer-
One way to prevent chemical contaminants from degrading a building's indoor air quality
is to
properly balancing the building's air supply and the exhaust system - Answer-IAQ
problems resulting from teh creation of negative pressure areas in a building due to
insufficient outdoor makeup air may be corrected by
air handling and VAV systems - Answer-An automated building - management system
communicates directly with the building's
dry bulb - Answer-What scale on a psychrometric chart can also be referred to as the
sensible heat scale ?
specific density - Answer-The measure of the weight of air in pounds for every cubic
foot of space occupied by air is called its
relative humidity - Answer-A ratio expressed in percentage of the amount of moisture
present in the air to amount it can hold at saturation is called
lower - Answer-Compared to an air handler in a high mountain cabin , what are the
airflow requirements per ton of cooling of an identical air handler installed in a seaside
cottage ?
blower inlet - Answer-The lowest air pressure in an air distribution system is found at the
14.7 psia - Answer-At sea level , every square inch of the earth has an absolute
pressure of
heater volts , amps , and AT - Answer-The values needed to calculate air volume ( cfm )
delivered by an air handler equipped with electric heaters are
6 inches - Answer-What is the maximum distance between pitot tube measuring points
in rectangular ducts ?
is decreased - Answer-If the speed of a blower used to move air through a duct is
decreased , the horsepower requirement of the motor
total pressure - Answer-The inner impact tube of a pitot tube measures
GUIDE QUESTIONS AND ANSWERS
multiple chemical sensitivity - Answer-Persons who perceive they are vulnerable to
exposure to certain chemicals and / or combinations of chemicals may suffer from
more susceptible to poor IAQ - Answer-Buildings that have low air - exchange rates are
20 percent - Answer-A building is said to have sick - building syndrome when more than
what percent of its occupants complain during a two - week period of symptoms that are
alleviated when the occupants leave the building ?
occur after a single , high - dose exposure - Answer-Short - term or immediate effects of
human exposure to poor IAQ may
cancer - Answer-Which of the following is a possible long - term effected of exposure to
indoor air pollutants ?
IEQ - Answer-IAQ is an integral part of
prevailing wind conditioned at the site - Answer-To get proper ventilation - damper
building's HVAC equipment , once should consider outside - air duct locations ,
neighboring pollutant orientation and adequate filtration systems into the design of a
new sources and the
Achieving good indoor air quality begins with initial building design , sitting , and
construction - Answer-Which of the following is a true statement ?
1,000 - Answer-A ventilation problem may exist when the carbon dioxide level in a room
exceeds how many parts per million (ppm) ?
soil and rocks - Answer-The most common source of radon is uranium in
sub - slab depressurization - Answer-Which of the following is a common method for
reducing radon in a building ?
the breathing of the building's human occupants - Answer-High levels of carbon dioxide
in a building can result from
properly sealing all ducts during installation - Answer-The best solution to air - duct
leakage problems is
bacteria - Answer-Ultraviolet light is used to control
gaseous vapors - Answer-Activated charcoal filters are used mainly to remove
, If an HVAC contractor detects an IAQ problem during routine maintenance , the
contractor - Answer-Which of the following statements is true ?
replaced - Answer-To control microbial contaminants , water - damaged ceiling tiles
should be
locate outside air intakes away from where motor vehicle emissions collect - Answer-
One way to prevent chemical contaminants from degrading a building's indoor air quality
is to
properly balancing the building's air supply and the exhaust system - Answer-IAQ
problems resulting from teh creation of negative pressure areas in a building due to
insufficient outdoor makeup air may be corrected by
air handling and VAV systems - Answer-An automated building - management system
communicates directly with the building's
dry bulb - Answer-What scale on a psychrometric chart can also be referred to as the
sensible heat scale ?
specific density - Answer-The measure of the weight of air in pounds for every cubic
foot of space occupied by air is called its
relative humidity - Answer-A ratio expressed in percentage of the amount of moisture
present in the air to amount it can hold at saturation is called
lower - Answer-Compared to an air handler in a high mountain cabin , what are the
airflow requirements per ton of cooling of an identical air handler installed in a seaside
cottage ?
blower inlet - Answer-The lowest air pressure in an air distribution system is found at the
14.7 psia - Answer-At sea level , every square inch of the earth has an absolute
pressure of
heater volts , amps , and AT - Answer-The values needed to calculate air volume ( cfm )
delivered by an air handler equipped with electric heaters are
6 inches - Answer-What is the maximum distance between pitot tube measuring points
in rectangular ducts ?
is decreased - Answer-If the speed of a blower used to move air through a duct is
decreased , the horsepower requirement of the motor
total pressure - Answer-The inner impact tube of a pitot tube measures
