HVAC Contractor prep 2022 Test 2
The International Mechanical Code considers a "flammable Vapor" to be
concentration of flammable constituents in the air which exceeds
_____________ percent of its flammability limit. - -25%
- During installation or service of electrical controls, a digital multimeter set
to voltage must be connected in what manner? - -In parallell
- Unvented fuel-burning room heaters are NOT permitted in a Group
___________ occupancy? - -A
- According to the Code, smoke detectors shall be installed in return air
system with a design capacity of at least HOW MANY cubic feet per minute of
air flow in the duct, plenum, filters, air connections, or decontamination
equipment and appliances? - -2,000 CFM
- If a system is using 12" round steel duct, what would be the air velocity
measurement expressed in feet per minute (fpm) given that the air traveling
through the duct is a velocity of 600 CFM? - -763 fpm
- Given that an 80,000 Btu/h gas furnace will have the combustion air
supplied from a mechanical air supply system outdoor source, the
combustion air in shall be at least _________ Cubic Feet per Minute
ventilation? - -28 cfpm
- Texas Department of License and Regulation requires that a contractor
give company contact information update if there are any changes as soon
as possible. This notification must be within how many days? - -30 days
- Where the drain pipes from more than one unit manifolded together for
condensate drainage, the pipe or tubing shall be sized according to the
equipment capacity. What would be the minimum size if the requirement
was 65 tons of refrigerant? - -1-1/4 in
- Where equipment replacements and repairs are required to be performed
in an emergency situation, the permit application shall be submitted within
_________ to the department of inspection. - -Next working day
- All refrigerant piping installations that contain more than 6.6 lb of a
refrigerant in systems using positive-displacement compressors shall NOT
have stop valves installed at the ___________? - -Inlet of each receiver
- What characteristic establishes the classification of industrial heating
equipment for the purpose of determining if it is a low, medium, or high-heat
, Appliance? - -The temperature of the combustion gases at the equipment
flue Outlet
- According to the Texas contractor's business reference manual which of
the following listed below does not require the license number of the
contractor? - -Printed material, newspaper ads, yellow page ads, business
cards
- Riser ducts shall be held in place by means of metal straps or angles and
channels to secure the riser to the structure. What would be the maximum
horizontal spacing of straps if the duct was rectangular with a max side
dimension of 30in - -On 10' centers
- According to the textbook modern refrigeration and air-conditioning, the
location in position of a TXV sensing bulb on the suction line depends on the
tubing size, therefore, what is the correct mounting location of a TXV sensing
bulb given that the suction line is 3/4 inch to 7/8 inch tubing size - -Ten o'
clock, or two o' clock (10 or 2)
- According to the International Fuel Gas Code, ducts combustion air shall
not serve more than one __________? - -Appliance enclosure
- Mechanical and gravity outdoor air intake openings shall be located not
less than HOW MANY feet horizontally from any hazardous or noxious
contaminant sources, such as vents, streets, alleys, parking lots and loading
docks? - -10 feet from lot lines
- Air being conveyed from a heat exchanger to an area used for human
habitation is defined as _________ air - -Supply air
- Pressure relief valves of a commercial system, located within the
machinery room shall terminate ____________ at a location not less than 15
feet above the adjoining grade level. - -Outside
- Motors and fans of shall be sized to provide the required air movement,
and equipped with listed air filters using with adhesive coatings that have a
flash point of _____________ or higher, as determined by the Fire Code
standards - -350 Degrees F
- The Authority Having Jurisdictions or _________ shall be permitted to
disconnect fuel gas utility service or emergency supplies to a building in case
of emergency were necessary to illuminate or immediate hazard to life or
property - -Building official
- According to the textbook Modern Refrigeration and Air Conditioning, A
heat pump system requires more refrigerant in cooling mode then in heating
The International Mechanical Code considers a "flammable Vapor" to be
concentration of flammable constituents in the air which exceeds
_____________ percent of its flammability limit. - -25%
- During installation or service of electrical controls, a digital multimeter set
to voltage must be connected in what manner? - -In parallell
- Unvented fuel-burning room heaters are NOT permitted in a Group
___________ occupancy? - -A
- According to the Code, smoke detectors shall be installed in return air
system with a design capacity of at least HOW MANY cubic feet per minute of
air flow in the duct, plenum, filters, air connections, or decontamination
equipment and appliances? - -2,000 CFM
- If a system is using 12" round steel duct, what would be the air velocity
measurement expressed in feet per minute (fpm) given that the air traveling
through the duct is a velocity of 600 CFM? - -763 fpm
- Given that an 80,000 Btu/h gas furnace will have the combustion air
supplied from a mechanical air supply system outdoor source, the
combustion air in shall be at least _________ Cubic Feet per Minute
ventilation? - -28 cfpm
- Texas Department of License and Regulation requires that a contractor
give company contact information update if there are any changes as soon
as possible. This notification must be within how many days? - -30 days
- Where the drain pipes from more than one unit manifolded together for
condensate drainage, the pipe or tubing shall be sized according to the
equipment capacity. What would be the minimum size if the requirement
was 65 tons of refrigerant? - -1-1/4 in
- Where equipment replacements and repairs are required to be performed
in an emergency situation, the permit application shall be submitted within
_________ to the department of inspection. - -Next working day
- All refrigerant piping installations that contain more than 6.6 lb of a
refrigerant in systems using positive-displacement compressors shall NOT
have stop valves installed at the ___________? - -Inlet of each receiver
- What characteristic establishes the classification of industrial heating
equipment for the purpose of determining if it is a low, medium, or high-heat
, Appliance? - -The temperature of the combustion gases at the equipment
flue Outlet
- According to the Texas contractor's business reference manual which of
the following listed below does not require the license number of the
contractor? - -Printed material, newspaper ads, yellow page ads, business
cards
- Riser ducts shall be held in place by means of metal straps or angles and
channels to secure the riser to the structure. What would be the maximum
horizontal spacing of straps if the duct was rectangular with a max side
dimension of 30in - -On 10' centers
- According to the textbook modern refrigeration and air-conditioning, the
location in position of a TXV sensing bulb on the suction line depends on the
tubing size, therefore, what is the correct mounting location of a TXV sensing
bulb given that the suction line is 3/4 inch to 7/8 inch tubing size - -Ten o'
clock, or two o' clock (10 or 2)
- According to the International Fuel Gas Code, ducts combustion air shall
not serve more than one __________? - -Appliance enclosure
- Mechanical and gravity outdoor air intake openings shall be located not
less than HOW MANY feet horizontally from any hazardous or noxious
contaminant sources, such as vents, streets, alleys, parking lots and loading
docks? - -10 feet from lot lines
- Air being conveyed from a heat exchanger to an area used for human
habitation is defined as _________ air - -Supply air
- Pressure relief valves of a commercial system, located within the
machinery room shall terminate ____________ at a location not less than 15
feet above the adjoining grade level. - -Outside
- Motors and fans of shall be sized to provide the required air movement,
and equipped with listed air filters using with adhesive coatings that have a
flash point of _____________ or higher, as determined by the Fire Code
standards - -350 Degrees F
- The Authority Having Jurisdictions or _________ shall be permitted to
disconnect fuel gas utility service or emergency supplies to a building in case
of emergency were necessary to illuminate or immediate hazard to life or
property - -Building official
- According to the textbook Modern Refrigeration and Air Conditioning, A
heat pump system requires more refrigerant in cooling mode then in heating
