NATE AC Service Certification ACTUAL TEST BANK EXAM
\COMPLETE 329 QUESTIONS AND CORRECT DETAILED
ANSWERS \VERIFIED ANSWERS \ALREADY GRADED A+
||ASSURED PASS|LATEST UPDATE 2025-2026
Terms in this set (99)
A system is supplied from D. 6 pounds
the factory with charge of 5
pounds 10 ounces for a 15ft - 25ft = 10ft x .6 = 6 ounces
15 foot line set. The line set 5 pounds + 10 ounces + 6 ounces
is 25 feet long. The
5 pounds + 16 ounces = 6 pounds
manufacturer's instruction
sheet specifies 0.6 ounces of
refrigeration to be
added for each added
foot of refrigerant line set
length. What is the total
refrigerant charge for the
system?
A. 6 ounces
B. 5 pounds
C. 5 pounds 10 ounces
D. 6 pounds
Supply ducts running C. a vapor barrier.
through unconditioned
space should be insulated
and have:
A. equal friction.
B. excessive air velocity.
C. a vapor barrier.
D. a transition backing.
,An important C. the vanes operate without binding.
consideration when
installing a motorized
economizer is to check to
be certain that:
A. the vanes are set for a
maximum 10% outdoor air.
B. the vanes open on any
call for cooling.
C. the vanes operate
without binding.
D. the vanes are
permanently set at 50%.
On a 3 ton unit installation, C. Excess airflow(400cfm per ton, 3 ton=1200cfm)
the measure airflow
equals 1550 CFM. What
does this indicate?
A. Proper balancing
B. Low Airflow
C. Excess airflow
D. Improper balancing
,Electronic type leak C. setting the detector for use in environments with
detectors typically have a ambient refrigerant vapor.
push-button or knob for
setting a reference
refrigerant level. This
feature is useful for:
A. adjusting the detector
after installing a new
battery.
B. checking the factory
calibration of the
instrument.
C. setting the detector for
use in environments with
ambient refrigerant vapor.
D. adjusting the detector
for the type refrigerant to
be checked.
, What will refrigerant oil in C. All readings on that gauge will not be affected.
a hose cause when a
technician is checking the
pressures in an operation
system with a manifold
gauge set?
A. All readings on that
gauge will increase in
value.
B. All readings on that
gauge will decrease in
value.
C. All readings on that
gauge will not be
affected.
D. The gauge will read 0
psig.
Which measures duct C. Mechanical velometer
static pressure?
A. Anemometer
B. Air balance hood
C. Mechanical velometer
D. Differential pressure
gauge
A duct 36 in. x 24 in. that A. 3600 CFM.
has an average velocity of
600 fpm is handling: CFM = Velocity x Area (ft.^2)
CFM = 600fpm x ((36 x 24)/144)) (convert to sq. ft.)
A. 3600 CFM. CFM = 600fpm x 6sqft
B. 2400 CFM. CFM = 3600 CFM
C. 1200 CFM.
D. 1000 CFM.
\COMPLETE 329 QUESTIONS AND CORRECT DETAILED
ANSWERS \VERIFIED ANSWERS \ALREADY GRADED A+
||ASSURED PASS|LATEST UPDATE 2025-2026
Terms in this set (99)
A system is supplied from D. 6 pounds
the factory with charge of 5
pounds 10 ounces for a 15ft - 25ft = 10ft x .6 = 6 ounces
15 foot line set. The line set 5 pounds + 10 ounces + 6 ounces
is 25 feet long. The
5 pounds + 16 ounces = 6 pounds
manufacturer's instruction
sheet specifies 0.6 ounces of
refrigeration to be
added for each added
foot of refrigerant line set
length. What is the total
refrigerant charge for the
system?
A. 6 ounces
B. 5 pounds
C. 5 pounds 10 ounces
D. 6 pounds
Supply ducts running C. a vapor barrier.
through unconditioned
space should be insulated
and have:
A. equal friction.
B. excessive air velocity.
C. a vapor barrier.
D. a transition backing.
,An important C. the vanes operate without binding.
consideration when
installing a motorized
economizer is to check to
be certain that:
A. the vanes are set for a
maximum 10% outdoor air.
B. the vanes open on any
call for cooling.
C. the vanes operate
without binding.
D. the vanes are
permanently set at 50%.
On a 3 ton unit installation, C. Excess airflow(400cfm per ton, 3 ton=1200cfm)
the measure airflow
equals 1550 CFM. What
does this indicate?
A. Proper balancing
B. Low Airflow
C. Excess airflow
D. Improper balancing
,Electronic type leak C. setting the detector for use in environments with
detectors typically have a ambient refrigerant vapor.
push-button or knob for
setting a reference
refrigerant level. This
feature is useful for:
A. adjusting the detector
after installing a new
battery.
B. checking the factory
calibration of the
instrument.
C. setting the detector for
use in environments with
ambient refrigerant vapor.
D. adjusting the detector
for the type refrigerant to
be checked.
, What will refrigerant oil in C. All readings on that gauge will not be affected.
a hose cause when a
technician is checking the
pressures in an operation
system with a manifold
gauge set?
A. All readings on that
gauge will increase in
value.
B. All readings on that
gauge will decrease in
value.
C. All readings on that
gauge will not be
affected.
D. The gauge will read 0
psig.
Which measures duct C. Mechanical velometer
static pressure?
A. Anemometer
B. Air balance hood
C. Mechanical velometer
D. Differential pressure
gauge
A duct 36 in. x 24 in. that A. 3600 CFM.
has an average velocity of
600 fpm is handling: CFM = Velocity x Area (ft.^2)
CFM = 600fpm x ((36 x 24)/144)) (convert to sq. ft.)
A. 3600 CFM. CFM = 600fpm x 6sqft
B. 2400 CFM. CFM = 3600 CFM
C. 1200 CFM.
D. 1000 CFM.
