MD HVAC Masters Exam Prep Guide | 2025/2026
Updated Study Questions & Verified Answers |
Complete HVAC Master License Test Resource
FOR MECHANICAL DRAFT SYSTEM, EXIT TERMINAL LOCATED ADJACENT TO PUBLIC WALKWAYS SHALL
BE NO LESS THAN ____________ FEET ABOVE FINISH GROUND LEVEL.
ANSWER: 7
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
Updated Study Questions & Verified Answers |
Complete HVAC Master License Test Resource
FOR MECHANICAL DRAFT SYSTEM, EXIT TERMINAL LOCATED ADJACENT TO PUBLIC WALKWAYS SHALL
BE NO LESS THAN ____________ FEET ABOVE FINISH GROUND LEVEL.
ANSWER: 7
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
