HVAC Journeyman Test
Sensible Heat - ANS-Heat that can be Measured
Specific Heat - ANS-The Amount of Heat Required to Raise 1 LB of a Substance 1*F
Latent Heat - ANS-Heat used to cause change of state.
BTU - ANS-amount of heat required to raise 1LB of water 1*F
One Ton of Refrigeration - ANS-2000 x 144 x 24,288,000 Btu/24hours, and 12,000
Btu/hr
A Room Thermostat Should be Mounted - ANS-5 feet from the floor
To Provide Proper Oil Return to the Compressor - ANS-Suction line must be pitched
towards compressor.
What is the External Equalizer on a TXV for? - ANS-To offset the pressure drop across
the evaporator.
What is the Minimum Bending Radius of 1" soft Copper? - ANS-5"
What is the Heating Value of Natural Gas? - ANS-1,000 BTU/cu FT.
What is the Purpose of Fan Control? - ANS-Start and Stop the Fan Motor
What is a Limit Control? - ANS-De-Energizes the gas firing circuit upon high bonnet
temps.
What is a unconfined space? - ANS-A space whose volume is greater than 50 cu.ft./
1,000 BTU/h of total input of all gas fired appliances.
Total free area of a 15" x 24" combustion air opening used with a metal grill with a
unknown free area? - ANS-270 sq. in.
What is a confined space? - ANS-A space whose volume is less then 50 CU. ft./ 1000
BTU/h of total gas fired appliance input.
Sensible Heat - ANS-Heat that can be Measured
Specific Heat - ANS-The Amount of Heat Required to Raise 1 LB of a Substance 1*F
Latent Heat - ANS-Heat used to cause change of state.
BTU - ANS-amount of heat required to raise 1LB of water 1*F
One Ton of Refrigeration - ANS-2000 x 144 x 24,288,000 Btu/24hours, and 12,000
Btu/hr
A Room Thermostat Should be Mounted - ANS-5 feet from the floor
To Provide Proper Oil Return to the Compressor - ANS-Suction line must be pitched
towards compressor.
What is the External Equalizer on a TXV for? - ANS-To offset the pressure drop across
the evaporator.
What is the Minimum Bending Radius of 1" soft Copper? - ANS-5"
What is the Heating Value of Natural Gas? - ANS-1,000 BTU/cu FT.
What is the Purpose of Fan Control? - ANS-Start and Stop the Fan Motor
What is a Limit Control? - ANS-De-Energizes the gas firing circuit upon high bonnet
temps.
What is a unconfined space? - ANS-A space whose volume is greater than 50 cu.ft./
1,000 BTU/h of total input of all gas fired appliances.
Total free area of a 15" x 24" combustion air opening used with a metal grill with a
unknown free area? - ANS-270 sq. in.
What is a confined space? - ANS-A space whose volume is less then 50 CU. ft./ 1000
BTU/h of total gas fired appliance input.
