MD HVAC MASTERS LATEST FINAL EXAMS
QUESTIONS AND ANSWERS SURE A+
✔✔A liquid is considered flammable if it has a flash point below _______ degrees and
has a vapor pressure nit exceeding 50 psia. - ✔✔100
✔✔With no air movement in a room ____________ can possibly occur? -
✔✔Stratification
✔✔In a chilled water system, a connection between different metallic piping materials
must be made with ____________. - ✔✔Dielectric fittings
✔✔A controlled device responsive to relative humidity of the atmosphere is a
___________. - ✔✔Humidi stat
✔✔Type of instrument used to measure electrical resistance? - ✔✔Ohmmeter
✔✔An insulation that has absorbed moisture ___________. - ✔✔Has lost some of its
insulation value
✔✔The amount of makeup air is what in relation to the exhaust air in a kitchen exhaust
system? - ✔✔Make up air should be equal to exhaust air
, ✔✔Which of the following materials can be used on oil piping on residential installation?
- ✔✔Flexible connector
✔✔A ___________ is used to reduce noise caused by compressor pressure pulses. -
✔✔Muffler
✔✔The internal diameter of 2 inch type L copper is __________. - ✔✔1.985
✔✔What is the maximum length for a flexible duct connector? - ✔✔14 feet
✔✔A ___________ is connected to the end of a damper motor shaft and is used to
verify that combustion blower is on. - ✔✔Pressure switch
✔✔The maximum system design pressure for a hot water heating system is 60 PSI. the
test pressure shall be __________ PSI. - ✔✔100
✔✔A plenum duct liner shall have a maximum smoke index of _________. - ✔✔50
✔✔The A/C thermostat shall be located where the average temperature is consistent.
True or False? - ✔✔True
✔✔The mechanical ventilation for crawl space of 3000 sq.ft. home is ____________. -
✔✔60 CFM
✔✔What is the possible cause of a compressor running continuously? - ✔✔Low
refrigerant
✔✔The temperature differential between the makeup air in a conditioned space shall
not exceed _________. - ✔✔10 °F
✔✔What is the maximum ventilation for a 2 car residential garage? - ✔✔200 CFM
✔✔Which of the following instruments measures electrical power? - ✔✔Voltmeter
✔✔All are compliances of the IMC metallic ducts installed in/under concrete except:
a. Encased on all sides with minimum of 2" concrete
b. Properly secured before pouring concrete
c. Sloped to an excessive plenum for drainage
d. Accessible for cleaning - ✔✔Accessible for cleaning
QUESTIONS AND ANSWERS SURE A+
✔✔A liquid is considered flammable if it has a flash point below _______ degrees and
has a vapor pressure nit exceeding 50 psia. - ✔✔100
✔✔With no air movement in a room ____________ can possibly occur? -
✔✔Stratification
✔✔In a chilled water system, a connection between different metallic piping materials
must be made with ____________. - ✔✔Dielectric fittings
✔✔A controlled device responsive to relative humidity of the atmosphere is a
___________. - ✔✔Humidi stat
✔✔Type of instrument used to measure electrical resistance? - ✔✔Ohmmeter
✔✔An insulation that has absorbed moisture ___________. - ✔✔Has lost some of its
insulation value
✔✔The amount of makeup air is what in relation to the exhaust air in a kitchen exhaust
system? - ✔✔Make up air should be equal to exhaust air
, ✔✔Which of the following materials can be used on oil piping on residential installation?
- ✔✔Flexible connector
✔✔A ___________ is used to reduce noise caused by compressor pressure pulses. -
✔✔Muffler
✔✔The internal diameter of 2 inch type L copper is __________. - ✔✔1.985
✔✔What is the maximum length for a flexible duct connector? - ✔✔14 feet
✔✔A ___________ is connected to the end of a damper motor shaft and is used to
verify that combustion blower is on. - ✔✔Pressure switch
✔✔The maximum system design pressure for a hot water heating system is 60 PSI. the
test pressure shall be __________ PSI. - ✔✔100
✔✔A plenum duct liner shall have a maximum smoke index of _________. - ✔✔50
✔✔The A/C thermostat shall be located where the average temperature is consistent.
True or False? - ✔✔True
✔✔The mechanical ventilation for crawl space of 3000 sq.ft. home is ____________. -
✔✔60 CFM
✔✔What is the possible cause of a compressor running continuously? - ✔✔Low
refrigerant
✔✔The temperature differential between the makeup air in a conditioned space shall
not exceed _________. - ✔✔10 °F
✔✔What is the maximum ventilation for a 2 car residential garage? - ✔✔200 CFM
✔✔Which of the following instruments measures electrical power? - ✔✔Voltmeter
✔✔All are compliances of the IMC metallic ducts installed in/under concrete except:
a. Encased on all sides with minimum of 2" concrete
b. Properly secured before pouring concrete
c. Sloped to an excessive plenum for drainage
d. Accessible for cleaning - ✔✔Accessible for cleaning
