Page | 1
AIRC 1060 Questions with Detailed
Verified Answers
Question: Compared to hot water heating coils, steam heating coils are:
Answer: physically smaller
Question:
unit 46: A type system that allows simultaneous heating and cooling to
different parts of a building is the
Answer: heat recovery system
Question:
While multisplit units are limited to a single outdoor unit, large VRF systems
can combine as many as ________ outdoor units manifolded together to
increase overall system capacity.
Answer: three outdoor units
Question:
Manufacturers recommend pressurizing VRF piping to ________ with nitrogen
and performing a 24 hour standing leak test
Answer: 500 psig to 600 psig
Question:
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To avoid the creation of oxides in the refrigeration lines of mini-split systems,
the lines are assembled:
Answer: Using heavy-walled flare fittings
Question:
VRF systems are commercial systems. The outdoor units are normally
designed to operate on ________ phase power and the indoor units on
________ phase power.
Answer: three phase and single phase
Question:
Wiring for a four-port multisplit system runs:
Answer: Using heavy-walled flare fittings
Question:
It is possible for one multi-split indoor unit to heat while another cools
Answer: no
Question:
VRF systems use a refrigeration network of:
Answer: connecting all components of the system
Question:
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It is important when wiring multisplit systems that the indoor units connect to
their corresponding A, B, C, or D terminal block on the outdoor unit
Answer: true
Question:
Standard wyes and tees are not used in VRF refrigeration networks as they
introduce turbulence and do not ensure even flow to both branches.
Answer: true
Question:
Which system allows simultaneous heating or cooling?
Answer: heat recovery system
Question:
Most systems can operate with up to ________ feet of lines and a maximum of
________ feet vertical distance between the indoor and outdoor units.
Answer: 50 feet and 10 feet
Question:
Multisplit manufacturer's installation instructions will specify the maximum
total installed piping length which can be supported by the charge shipped in
the unit. If additional piping is installed the only correct way to charge the
system is to:
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Answer: see the specified amount of refigerant to add for each additional
footof refrigerant line
Question:
Variable refrigerant flow systems use:
Answer: multiple indoor units
Question:
Flare connections are used on mini-split systems to avoid oxidation in the lines
and also to avoid heating and destroying the sensitive electronic expansion
valves use in the outdoor units.
Answer: false
Question:
On heat recovery systems:
Answer: allow simultaneous operation of heating and cooling
Question:
When factory supplied branch joints are not available for VRF refrigerant
piping it is permissible to use standard tees or wyes.
Answer: false
Question:
AIRC 1060 Questions with Detailed
Verified Answers
Question: Compared to hot water heating coils, steam heating coils are:
Answer: physically smaller
Question:
unit 46: A type system that allows simultaneous heating and cooling to
different parts of a building is the
Answer: heat recovery system
Question:
While multisplit units are limited to a single outdoor unit, large VRF systems
can combine as many as ________ outdoor units manifolded together to
increase overall system capacity.
Answer: three outdoor units
Question:
Manufacturers recommend pressurizing VRF piping to ________ with nitrogen
and performing a 24 hour standing leak test
Answer: 500 psig to 600 psig
Question:
, Page | 2
To avoid the creation of oxides in the refrigeration lines of mini-split systems,
the lines are assembled:
Answer: Using heavy-walled flare fittings
Question:
VRF systems are commercial systems. The outdoor units are normally
designed to operate on ________ phase power and the indoor units on
________ phase power.
Answer: three phase and single phase
Question:
Wiring for a four-port multisplit system runs:
Answer: Using heavy-walled flare fittings
Question:
It is possible for one multi-split indoor unit to heat while another cools
Answer: no
Question:
VRF systems use a refrigeration network of:
Answer: connecting all components of the system
Question:
, Page | 3
It is important when wiring multisplit systems that the indoor units connect to
their corresponding A, B, C, or D terminal block on the outdoor unit
Answer: true
Question:
Standard wyes and tees are not used in VRF refrigeration networks as they
introduce turbulence and do not ensure even flow to both branches.
Answer: true
Question:
Which system allows simultaneous heating or cooling?
Answer: heat recovery system
Question:
Most systems can operate with up to ________ feet of lines and a maximum of
________ feet vertical distance between the indoor and outdoor units.
Answer: 50 feet and 10 feet
Question:
Multisplit manufacturer's installation instructions will specify the maximum
total installed piping length which can be supported by the charge shipped in
the unit. If additional piping is installed the only correct way to charge the
system is to:
, Page | 4
Answer: see the specified amount of refigerant to add for each additional
footof refrigerant line
Question:
Variable refrigerant flow systems use:
Answer: multiple indoor units
Question:
Flare connections are used on mini-split systems to avoid oxidation in the lines
and also to avoid heating and destroying the sensitive electronic expansion
valves use in the outdoor units.
Answer: false
Question:
On heat recovery systems:
Answer: allow simultaneous operation of heating and cooling
Question:
When factory supplied branch joints are not available for VRF refrigerant
piping it is permissible to use standard tees or wyes.
Answer: false
Question:
