MD HVAC MASTERS UPDATED LATEST ACTUAL
QUESTIONS AND ANSWERS SURE A+
✔✔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. - ✔✔Low
✔✔A connector to a chimney flue shall be at least __________ the lowest portion of the
interior of the flue. - ✔✔12" above
✔✔The temperature for a fire damper actuating device shall not be less than
___________ degrees. - ✔✔160
✔✔Horizontal pipes in a hydronic system should ____________. - ✔✔Be sloped toward
boiler
✔✔A boiler shall have an unobstructed passageway of ___________ around all sides. -
✔✔18"
✔✔What is the color code for R-410A? - ✔✔Rose
, ✔✔A one (1) ton refrigeration system has the equivalent of _________ BTU's. -
✔✔12,000
✔✔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? - ✔✔6
✔✔The purpose of a suction accumulator is _______________. - ✔✔It 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
____________. - ✔✔22 x 30
✔✔External equalizing line should be installed downstream of the thermostatic
expansion valve at? - ✔✔Diaphragm
✔✔A feed water line that delivers makeup water to a hydronic boiler is required to have
which two kinds of valves? - ✔✔A hand valve and a pressure reducing valve
✔✔Materials used in plenums shall have a flame rating of _____________. - ✔✔25
✔✔Flexible air duct connections may pass through which of the following?
a. The floor
b. Non-rated wall
c. The ceiling
d. None - ✔✔None
✔✔Pipe insulation shall be used to protect refrigerant piping when surface temperature
drops below ____________. - ✔✔Dew point
✔✔_____________ temperature determines the defrost termination on a heat pump
using time initiated temperature. - ✔✔Ambient
✔✔What combinations of material will reduce the clearance of an unlisted residential
fired furnace from 18" to 6"? - ✔✔Galvanized sheet metal spaced 1" off combustible
assembly
✔✔A fuel fired warm air heater is installed in a residential garage. There is no protection
from vehicle impact. The ignition source of the heater must have a minimum ground
clearance of ____________. - ✔✔18"
✔✔Maximum vertical spacing for steel pipe is ___________. - ✔✔15 feet
QUESTIONS AND ANSWERS SURE A+
✔✔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. - ✔✔Low
✔✔A connector to a chimney flue shall be at least __________ the lowest portion of the
interior of the flue. - ✔✔12" above
✔✔The temperature for a fire damper actuating device shall not be less than
___________ degrees. - ✔✔160
✔✔Horizontal pipes in a hydronic system should ____________. - ✔✔Be sloped toward
boiler
✔✔A boiler shall have an unobstructed passageway of ___________ around all sides. -
✔✔18"
✔✔What is the color code for R-410A? - ✔✔Rose
, ✔✔A one (1) ton refrigeration system has the equivalent of _________ BTU's. -
✔✔12,000
✔✔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? - ✔✔6
✔✔The purpose of a suction accumulator is _______________. - ✔✔It 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
____________. - ✔✔22 x 30
✔✔External equalizing line should be installed downstream of the thermostatic
expansion valve at? - ✔✔Diaphragm
✔✔A feed water line that delivers makeup water to a hydronic boiler is required to have
which two kinds of valves? - ✔✔A hand valve and a pressure reducing valve
✔✔Materials used in plenums shall have a flame rating of _____________. - ✔✔25
✔✔Flexible air duct connections may pass through which of the following?
a. The floor
b. Non-rated wall
c. The ceiling
d. None - ✔✔None
✔✔Pipe insulation shall be used to protect refrigerant piping when surface temperature
drops below ____________. - ✔✔Dew point
✔✔_____________ temperature determines the defrost termination on a heat pump
using time initiated temperature. - ✔✔Ambient
✔✔What combinations of material will reduce the clearance of an unlisted residential
fired furnace from 18" to 6"? - ✔✔Galvanized sheet metal spaced 1" off combustible
assembly
✔✔A fuel fired warm air heater is installed in a residential garage. There is no protection
from vehicle impact. The ignition source of the heater must have a minimum ground
clearance of ____________. - ✔✔18"
✔✔Maximum vertical spacing for steel pipe is ___________. - ✔✔15 feet
