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MD HVAC Masters 2024/2025 graded A+ by experts
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MD HVAC Masters 2024/2025 graded A+ by experts
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MD HVAC MastersFor mechanical draft system, exit terminal located adjacent to public walkways shall be no less
than ____________ feet above finish ground level. - ANS7
A 2000 sq. ft. "Type II" dry-cleaning systems shall be provided with an exhaust no less than
__________ CFM's. - ANS2000
A bathroom in a dwelling unit must be provided with a minimum intermittent exhaust of
__________. - ANS50 CFM
A hot-water heating boiler that has a 5,000,000 BTU/HR input shall have a minimum clearance
of _____________ from the top of the boiler to the ceiling. - ANS3 feet
A heater installed in a public garage must be installed a minimum distance of ____________
above the floor? - ANS8 feet
______________ is a tube or pipe used to carry refrigerant gas from evaporator to the
compressor - ANSSuction line
Commercial appliance exhaust outlets that terminate above roof shall have the discharge
opening located not less than ___________ inches above the roof surface. - ANS40
A run winding in a compressor has _____________ resistance than the start winding. -
ANSLess
A duct that has an operating temperature of 150 deg F shall be insulated to limit the exposed
surface temperature to ___________. - ANS120 °F
Hydronic pipe system should be cleaned with water and _____________ after installation. -
ANSTrisodium Phosphate
Using a psychrometric chart in the Modern Refrigeration, what will the wet bulb be if the dry bulb
is 80 degrees and the humidity is 30%? - ANS60 °F
Outside air exhaust and intake openings shall be located a minimum of ____________ feet from
lot lines or building on the same lot. - ANS10
Down - pipe support material must not promote: - ANSGalvanic action
Central HVAC systems shall have air filters installed in which of the following locations? -
ANSUpstream from any exchanger coil
, An auxiliary drain pan used in secondary drain systems for an a/c systems shall have a
minimum depth of ________ inch. - ANS1 ½
A ventilation supply system shall deliver the required rate of supply air within an occupied space
minimum of ____________ above the floor. - ANS3"
In a unit controlled by a thermostat the differential is the difference between ____________. -
ANSTemperature at which the switch turns the burners on and the temperature at which the
switch turns the burners off
A ___________ is used to measure relative humidity by comparing wet/dry bulb temperatures. -
ANSSling Psychrometric
A (n) ___________ prevents slugging in a heat pump system. - ANSAccumulator
Any appliance in which the products of combustion at the point of entrance to the flue under
normal operating conditions have a temperature of 1000 degrees is a ____________ appliance.
- ANSLow
A connector to a chimney flue shall be at least __________ the lowest portion of the interior of
the flue. - ANS12" above
The temperature for a fire damper actuating device shall not be less than ___________
degrees. - ANS160
Horizontal pipes in a hydronic system should ____________. - ANSBe sloped toward boiler
A boiler shall have an unobstructed passageway of ___________ around all sides. - ANS18"
What is the color code for R-410A? - ANSRose
A one (1) ton refrigeration system has the equivalent of _________ BTU's. - ANS12,000
A safety belt lanyard shall be a minimum of ½" nylon, or equivalent, with a maximum length to
provide for a fall of no greater than __________ feet? - ANS6
The purpose of a suction accumulator is _______________. - ANSIt catches and holds liquid
refrigerant that has passed through the evaporator coil so it will not enter the compressor
Minimum size access opening for equipment installed in an underfloor area is ____________. -
ANS22 x 30
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