HVAC (80 Questions) Test with All Correct & 100%
Verified Answers |Latest Version| Guaranteed to Pass
The single-phase voltage distributed to homes is typically ✔Correct Answer-240 V.
The component that remains in the circuit after a single-phase motor has started is the ✔Correct
Answer-run capacitor.
Which of the following types of motors can reverse its direction of rotation by simply swapping two
power supply connections? ✔Correct Answer-Three-phase.
The simplest form of compressor capacity control is ✔Correct Answer-on/off compressor cycling.
What unique issue must be considered when two compressors share a common R circuit?
✔Correct Answer-Compressor oil levels.
With a three-phase compressor motor, failure may result if the phase-to-phase voltage imbalance
exceeds ✔Correct Answer-2 percent.
With what type of R blend is fractionation a problem? ✔Correct Answer-Zeotropic.
Compressor oil that is hygroscopic absorbs: ✔Correct Answer-Moisture.
During a recovery operation, spotting a patch of frost at a low spot in the liquid is an indication that
✔Correct Answer-some of the remaining R is vaporizing.
A sight glass on a TXV-equipment system that shows
R moving rather slowly with some bubbles in it is an indication that the: ✔Correct Answer-TV is
closed down and feeding little R.
Capillary tubes can be cut without damage using a ✔Correct Answer-tri-corner file.
A typical TXV responds to ✔Correct Answer-three different influences.
The type of expansion valve that uses a tiny electric heater in the valve operator is a ✔Correct
Answer-thermal-electric expansion valve.
The SEER standard was developed by ✔Correct Answer-The Air Conditioning and R Institute (ARI).
During defrost, supplemental heaters supply heat to ✔Correct Answer-temper the indoor air.
Room temperature control using a ductless split-system heat pump is often done with a ✔Correct
Answer-wireless remote.
The viscosity rating system that applies to industrial lubricants is known as the ✔Correct Answer-
SSU or SUS rating.
, Low viscosity oils provide ✔Correct Answer-lower friction at high operating speeds.
Most people will not experience any symptoms of CO poisoning as long as atmospheric levels stay
below ✔Correct Answer-70ppm.
Venting a condensing furnace under a deck can cause ✔Correct Answer-vent gas recirculation.
Grooved seams are rarely used in metals thicker than ✔Correct Answer-20 gauge
How are mechanically secured fasteners attached to the inside of a sheet metal duct? ✔Correct
Answer-Driven.
Which of the following organizations tests the properties of flexible ducts? ✔Correct Answer-Air
Diffusion Council.
What is the recommended blend of radius for a flexible duct? ✔Correct Answer-1 duct diameter.
The strength and stiffness of rigid duct board are identified by its ✔Correct Answer-El rating.
Fiberglass duct may be used in all of the following 10 applications or environments except
✔Correct Answer-outdoor
All of the following are acceptable finished closure systems for fiberglass duct except ✔Correct
Answer-Stapled duct joints.
When repairing minor facing damage with tape, the closure material must extend beyond all sides of
the tear by ✔Correct Answer-1 inch.
To properly hang rectangular fiberglass duct that is 60X30 with a hanger extension of 8 inches, the
size of the supporting channel must be at least ✔Correct Answer-3"X2"
When a branch duct connections to a main trunk, the first hanger on the branch must be located
within how many inches of the trunk duct ✔Correct Answer-12".52
An area of building can be classified as a control zone if it has ✔Correct Answer-a thermostat.
In normal design practice, how much ventilation air is supplied per person for office workers?
✔Correct Answer-20 cfm.
Bag filters are generally used in package units with a capacity of ✔Correct Answer-20 tons or
more.
Which of these is a type of wetted-element humidifier? ✔Correct Answer-Bypass humidifier.
A gravity hot-water heating system has ✔Correct Answer-no circulating pump.
For the most accurate pressure drop measurement in a water pipe, use a ✔Correct Answer-
Venturi tube.
Verified Answers |Latest Version| Guaranteed to Pass
The single-phase voltage distributed to homes is typically ✔Correct Answer-240 V.
The component that remains in the circuit after a single-phase motor has started is the ✔Correct
Answer-run capacitor.
Which of the following types of motors can reverse its direction of rotation by simply swapping two
power supply connections? ✔Correct Answer-Three-phase.
The simplest form of compressor capacity control is ✔Correct Answer-on/off compressor cycling.
What unique issue must be considered when two compressors share a common R circuit?
✔Correct Answer-Compressor oil levels.
With a three-phase compressor motor, failure may result if the phase-to-phase voltage imbalance
exceeds ✔Correct Answer-2 percent.
With what type of R blend is fractionation a problem? ✔Correct Answer-Zeotropic.
Compressor oil that is hygroscopic absorbs: ✔Correct Answer-Moisture.
During a recovery operation, spotting a patch of frost at a low spot in the liquid is an indication that
✔Correct Answer-some of the remaining R is vaporizing.
A sight glass on a TXV-equipment system that shows
R moving rather slowly with some bubbles in it is an indication that the: ✔Correct Answer-TV is
closed down and feeding little R.
Capillary tubes can be cut without damage using a ✔Correct Answer-tri-corner file.
A typical TXV responds to ✔Correct Answer-three different influences.
The type of expansion valve that uses a tiny electric heater in the valve operator is a ✔Correct
Answer-thermal-electric expansion valve.
The SEER standard was developed by ✔Correct Answer-The Air Conditioning and R Institute (ARI).
During defrost, supplemental heaters supply heat to ✔Correct Answer-temper the indoor air.
Room temperature control using a ductless split-system heat pump is often done with a ✔Correct
Answer-wireless remote.
The viscosity rating system that applies to industrial lubricants is known as the ✔Correct Answer-
SSU or SUS rating.
, Low viscosity oils provide ✔Correct Answer-lower friction at high operating speeds.
Most people will not experience any symptoms of CO poisoning as long as atmospheric levels stay
below ✔Correct Answer-70ppm.
Venting a condensing furnace under a deck can cause ✔Correct Answer-vent gas recirculation.
Grooved seams are rarely used in metals thicker than ✔Correct Answer-20 gauge
How are mechanically secured fasteners attached to the inside of a sheet metal duct? ✔Correct
Answer-Driven.
Which of the following organizations tests the properties of flexible ducts? ✔Correct Answer-Air
Diffusion Council.
What is the recommended blend of radius for a flexible duct? ✔Correct Answer-1 duct diameter.
The strength and stiffness of rigid duct board are identified by its ✔Correct Answer-El rating.
Fiberglass duct may be used in all of the following 10 applications or environments except
✔Correct Answer-outdoor
All of the following are acceptable finished closure systems for fiberglass duct except ✔Correct
Answer-Stapled duct joints.
When repairing minor facing damage with tape, the closure material must extend beyond all sides of
the tear by ✔Correct Answer-1 inch.
To properly hang rectangular fiberglass duct that is 60X30 with a hanger extension of 8 inches, the
size of the supporting channel must be at least ✔Correct Answer-3"X2"
When a branch duct connections to a main trunk, the first hanger on the branch must be located
within how many inches of the trunk duct ✔Correct Answer-12".52
An area of building can be classified as a control zone if it has ✔Correct Answer-a thermostat.
In normal design practice, how much ventilation air is supplied per person for office workers?
✔Correct Answer-20 cfm.
Bag filters are generally used in package units with a capacity of ✔Correct Answer-20 tons or
more.
Which of these is a type of wetted-element humidifier? ✔Correct Answer-Bypass humidifier.
A gravity hot-water heating system has ✔Correct Answer-no circulating pump.
For the most accurate pressure drop measurement in a water pipe, use a ✔Correct Answer-
Venturi tube.
