NATE AIR DISTRIBUTION EXAM 2025
LATEST EXAM QUESTIONS AND
DETAILED CORRECT ANSWERS |
ALREADY GRADED A+
Which of the following is the best description of a duct
traverse?
A: A series of carefully spaced velocity pressure readings
which may be converted to fpm using an equation
B: A series of carefully spaced velocity pressure readings
which may be converted directly to cfm using an equation
C: A series of carefully spaced static pressure readings
which may be converted to fpm using an equation
D: A series of carefully spaced static pressure readings
which may be converted to cfm using an equation Correct
Answer A: A series of carefully spaced velocity pressure
readings which may be converted to fpm using an
equation
How many holes must be made in a round duct in order to
take a series of traverse readings?
A: One
B: Two
C: Three
,D: Four Correct Answer B: Two
A thermo-anemometer measures
A: CFM directly
B: FPM directly
C: Total and static pressures directly
D: Temperature and humidity Correct Answer B: FPM
directly
The dew point temperature is
A: The temperature at which water vapor in the air will
condense into a liquid
B: The temperature at which air gives up its moisture
C: The saturation temperature of water vapor in a body of
air
D: All of the above Correct Answer D: All of the above
Dehumidification occurs when an air conditioning coil
A: Operates at or below the dew point of the air moving
across it
B: Operates above dew point
, C: The cooling coil always removes moisture as long as it
is operating
D: Cooling coils do not dehumidify air Correct Answer A:
Operates at or below the dew point of the air moving
across it
Who usually determines if a duct leakage test is to be
performed and the test pressure at which it will be
performed?
A: The design engineer
B: The installing contractor
C: The TAB technician
D: The sheet metal foreman Correct Answer A: The
design engineer
When testing a duct system to determine its leakage rate,
why is a special test stand necessary?
A: It contains a calibrated orifice and matching flow chart
for that orifice
B: It is manufactured to accepted testing standards
C: Test results can be traced to the specific test stand
used for the test if there are concerns about accuracy
, D: All of the above Correct Answer D: All of the above
Why are two manometers mounted on a duct leakage test
stand?
A: To use one as a spare in case something happens to
the other
B: To be checked for accuracy against each other
C: To speed up the testing procedure
D: None of these are correct Correct Answer D: None of
these are correct
When the dry bulb temperature increases, the relativity
humidity of air
A: Increases
B: Decreases
C: Remains the same
D: None of these Correct Answer B: Decreases
When the dry bulb temperature increases, the wet bulb
temperature
A: Increases
LATEST EXAM QUESTIONS AND
DETAILED CORRECT ANSWERS |
ALREADY GRADED A+
Which of the following is the best description of a duct
traverse?
A: A series of carefully spaced velocity pressure readings
which may be converted to fpm using an equation
B: A series of carefully spaced velocity pressure readings
which may be converted directly to cfm using an equation
C: A series of carefully spaced static pressure readings
which may be converted to fpm using an equation
D: A series of carefully spaced static pressure readings
which may be converted to cfm using an equation Correct
Answer A: A series of carefully spaced velocity pressure
readings which may be converted to fpm using an
equation
How many holes must be made in a round duct in order to
take a series of traverse readings?
A: One
B: Two
C: Three
,D: Four Correct Answer B: Two
A thermo-anemometer measures
A: CFM directly
B: FPM directly
C: Total and static pressures directly
D: Temperature and humidity Correct Answer B: FPM
directly
The dew point temperature is
A: The temperature at which water vapor in the air will
condense into a liquid
B: The temperature at which air gives up its moisture
C: The saturation temperature of water vapor in a body of
air
D: All of the above Correct Answer D: All of the above
Dehumidification occurs when an air conditioning coil
A: Operates at or below the dew point of the air moving
across it
B: Operates above dew point
, C: The cooling coil always removes moisture as long as it
is operating
D: Cooling coils do not dehumidify air Correct Answer A:
Operates at or below the dew point of the air moving
across it
Who usually determines if a duct leakage test is to be
performed and the test pressure at which it will be
performed?
A: The design engineer
B: The installing contractor
C: The TAB technician
D: The sheet metal foreman Correct Answer A: The
design engineer
When testing a duct system to determine its leakage rate,
why is a special test stand necessary?
A: It contains a calibrated orifice and matching flow chart
for that orifice
B: It is manufactured to accepted testing standards
C: Test results can be traced to the specific test stand
used for the test if there are concerns about accuracy
, D: All of the above Correct Answer D: All of the above
Why are two manometers mounted on a duct leakage test
stand?
A: To use one as a spare in case something happens to
the other
B: To be checked for accuracy against each other
C: To speed up the testing procedure
D: None of these are correct Correct Answer D: None of
these are correct
When the dry bulb temperature increases, the relativity
humidity of air
A: Increases
B: Decreases
C: Remains the same
D: None of these Correct Answer B: Decreases
When the dry bulb temperature increases, the wet bulb
temperature
A: Increases
