MD HVAC MASTERS EXAMINATION TEST
COMPLETE QUESTIONS AND SOLUTIONS
●● A 2000 sq. ft. "Type II" dry-cleaning systems shall be provided with
an exhaust no less than __________ CFM's.
Answer: 2000
●● A bathroom in a dwelling unit must be provided with a minimum
intermittent exhaust of __________.
Answer: 50 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.
Answer: 3 feet
●● A heater installed in a public garage must be installed a minimum
distance of ____________ above the floor?
Answer: 8 feet
●● ______________ is a tube or pipe used to carry refrigerant gas from
evaporator to the compressor
Answer: Suction line
,●● Commercial appliance exhaust outlets that terminate above roof shall
have the discharge opening located not less than ___________ inches
above the roof surface.
Answer: 40
●● A run winding in a compressor has _____________ resistance than
the start winding.
Answer: Less
●● A duct that has an operating temperature of 150 deg F shall be
insulated to limit the exposed surface temperature to ___________.
Answer: 120 °F
●● Hydronic pipe system should be cleaned with water and
_____________ after installation.
Answer: Trisodium 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%?
Answer: 60 °F
●● Outside air exhaust and intake openings shall be located a minimum
of ____________ feet from lot lines or building on the same lot.
, Answer: 10
●● Down - pipe support material must not promote:
Answer: Galvanic action
●● Central HVAC systems shall have air filters installed in which of the
following locations?
Answer: Upstream 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.
Answer: 1 ½
●● A ventilation supply system shall deliver the required rate of supply
air within an occupied space minimum of ____________ above the
floor.
Answer: 3"
●● In a unit controlled by a thermostat the differential is the difference
between ____________.
Answer: Temperature at which the switch turns the burners on and the
temperature at which the switch turns the burners off
COMPLETE QUESTIONS AND SOLUTIONS
●● A 2000 sq. ft. "Type II" dry-cleaning systems shall be provided with
an exhaust no less than __________ CFM's.
Answer: 2000
●● A bathroom in a dwelling unit must be provided with a minimum
intermittent exhaust of __________.
Answer: 50 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.
Answer: 3 feet
●● A heater installed in a public garage must be installed a minimum
distance of ____________ above the floor?
Answer: 8 feet
●● ______________ is a tube or pipe used to carry refrigerant gas from
evaporator to the compressor
Answer: Suction line
,●● Commercial appliance exhaust outlets that terminate above roof shall
have the discharge opening located not less than ___________ inches
above the roof surface.
Answer: 40
●● A run winding in a compressor has _____________ resistance than
the start winding.
Answer: Less
●● A duct that has an operating temperature of 150 deg F shall be
insulated to limit the exposed surface temperature to ___________.
Answer: 120 °F
●● Hydronic pipe system should be cleaned with water and
_____________ after installation.
Answer: Trisodium 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%?
Answer: 60 °F
●● Outside air exhaust and intake openings shall be located a minimum
of ____________ feet from lot lines or building on the same lot.
, Answer: 10
●● Down - pipe support material must not promote:
Answer: Galvanic action
●● Central HVAC systems shall have air filters installed in which of the
following locations?
Answer: Upstream 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.
Answer: 1 ½
●● A ventilation supply system shall deliver the required rate of supply
air within an occupied space minimum of ____________ above the
floor.
Answer: 3"
●● In a unit controlled by a thermostat the differential is the difference
between ____________.
Answer: Temperature at which the switch turns the burners on and the
temperature at which the switch turns the burners off
