Cross breaking sheet metal duct will: The correct answer is: Stiffen the duct and reduce noise.
The correct answer is: More pressure drop.
Which of the following is one of the most
common disadvantages of using flex duct in
comparison to sheet metal duct?
The tool most commonly used to cut circles The correct answer is: Aviation snip.
in sheet metal is the:
The correct answer is: Eliminate the transmission of vibrations from the air handler to
The purpose of using a flexible duct ductwork.
connector between the air handler and the
sheet metal duct is to:
The correct answer is: Anemometer.
Which instrument can be used to check the
velocity of air through a register?
Velocity pressure is computed by subtracting The correct answer is: Total pressure.
the static pressure from the:
The correct answer is: Velometer.
Which instrument is used to check the
velocity of air through a coil or of air coming
out of a duct outlet?
The correct answer is: 800 CFM.
In a 12" X 12" ID duct the air velocity is
measured at 800fpm, what is the airflow?
The correct answer is: Maintains the same temperature in every room in the home.
A correct statement about balancing the air
distribution in a forced air heating system is
that this procedure:
The correct answer is: Into the air stream.
To accurately measure velocity pressure
with a pitot tube, the point of the pitot tube
should point:
The correct answer is: Negative pressure in the conditioned space.
A supply duct in an unconditioned space has
a significant leak, but the return duct is
properly sealed. This leak will cause:
The correct answer is: Inclined manometer.
What instrument is used to measure static
pressure drop across a cooling coil?
1234 CFM.
At sea level air enters a furnace at 75°F and
leaves it at 135°F. The furnace has a rated
input of 100,000 BTUH and a rated output of
80,000 BTUH. Approximately how much air
is this furnace moving?
The correct answer is: 110 CFM.
Using the friction chart below, which one of
the following would be the CFM value if a
100-foot duct had a 0.045 inch water column
static pressure loss and was rated at 400
fpm?
The correct answer is: 0.03 IWC.
Using the friction chart below, what would be
the friction loss if the CFM value was 200
and the air velocity value is 400?
The purpose of the tabs at the top and The correct answer is: Prevent movement of the drive cleat.
bottom of the drive cleat is to:
The sheet metal duct system which has The correct answer is: Extended plenum system.
main ducts of equal size is the:
The correct answer is: More pressure drop.
Which of the following is one of the most
common disadvantages of using flex duct in
comparison to sheet metal duct?
The tool most commonly used to cut circles The correct answer is: Aviation snip.
in sheet metal is the:
The correct answer is: Eliminate the transmission of vibrations from the air handler to
The purpose of using a flexible duct ductwork.
connector between the air handler and the
sheet metal duct is to:
The correct answer is: Anemometer.
Which instrument can be used to check the
velocity of air through a register?
Velocity pressure is computed by subtracting The correct answer is: Total pressure.
the static pressure from the:
The correct answer is: Velometer.
Which instrument is used to check the
velocity of air through a coil or of air coming
out of a duct outlet?
The correct answer is: 800 CFM.
In a 12" X 12" ID duct the air velocity is
measured at 800fpm, what is the airflow?
The correct answer is: Maintains the same temperature in every room in the home.
A correct statement about balancing the air
distribution in a forced air heating system is
that this procedure:
The correct answer is: Into the air stream.
To accurately measure velocity pressure
with a pitot tube, the point of the pitot tube
should point:
The correct answer is: Negative pressure in the conditioned space.
A supply duct in an unconditioned space has
a significant leak, but the return duct is
properly sealed. This leak will cause:
The correct answer is: Inclined manometer.
What instrument is used to measure static
pressure drop across a cooling coil?
1234 CFM.
At sea level air enters a furnace at 75°F and
leaves it at 135°F. The furnace has a rated
input of 100,000 BTUH and a rated output of
80,000 BTUH. Approximately how much air
is this furnace moving?
The correct answer is: 110 CFM.
Using the friction chart below, which one of
the following would be the CFM value if a
100-foot duct had a 0.045 inch water column
static pressure loss and was rated at 400
fpm?
The correct answer is: 0.03 IWC.
Using the friction chart below, what would be
the friction loss if the CFM value was 200
and the air velocity value is 400?
The purpose of the tabs at the top and The correct answer is: Prevent movement of the drive cleat.
bottom of the drive cleat is to:
The sheet metal duct system which has The correct answer is: Extended plenum system.
main ducts of equal size is the:
