HVAC Technical Exam H3-1 With All Correct & 100%
Verified Answers| Latest Update| Already Graded A+
Supports and hangers for duct work shall be based on the following? ✔Correct Answer-SMACNA
HVAC Duct Constructions Standards (Mech Chp 6 pg 71)
Any appliance in which the products of combustion at the point of entrance to the flue under normal
operating conditions have temperatures of 1000 degrees or less. ✔Correct Answer-Low Heat
Appliance (Mech Chp 2)
Defective materials or parts shall be replaced or repaired in such a manner so as to preserve the
original approval or _____? ✔Correct Answer-Listing (Mech Chp 3)
What is the minimum insulation value for a residential return air duct in Wilmington, North Carolina
when the duct is located in a sealed crawlspace? ✔Correct Answer-None Required (Energy R22)
When metal duct is used in a single-family and two-family dwellings and townhouses, metal straps
must be used to support the duct a maximum of _____ inch intervals? ✔Correct Answer-64 inches
(Mech Chp 6)
All heat pumps installed in North Carolina that utilize electric resistance heaters to provide
supplemental heat when the heat pump is operating below balance point must have _____ to keep
the heaters off when operating above balance point. ✔Correct Answer-Controls (Energy C-37)
1.25 inch diameter brass tubing and smaller shall be supported every _____ feet when in a horizontal
position? ✔Correct Answer-6 feet (Mech Chp 3)
The minimum duct insulation requirement for commercial duct work in unconditioned space located
inside the building is? ✔Correct Answer-R6 (Energy Chp 4)
High pressure refrigerant will _____ upon giving up its heat of compression and vaporization.
✔Correct Answer-Condense (General Knowledge)
Attics containing appliances shall be provided with a clear and unobstructed passage at least _____
high along the entire length of the passageway. ✔Correct Answer-30 inches (Mech Chp 3)
A commercial building has a roof that is 14 ft above grade and the roof has a four foot parapet all the
way around the roof. Does the Code require a permanent means of access? ✔Correct Answer-Yes
(Mech Chp 3)
You are replacing a 480,000 btu/hr RTU cooling unit in Mecklenburg County, North Carolina on a
building that contains light manufacturing and some office space. Do you need to include outdoor air
economizer in the bid? ✔Correct Answer-Yes (Energy Chp 4)
You are installing a 7.5 ton AHU in a commercial building. The unit has a 1 inch condensate
connection. What is the minimum size condensate drain line you can run by Code? ✔Correct
Answer-1 inch (Mech Chp 3)
Verified Answers| Latest Update| Already Graded A+
Supports and hangers for duct work shall be based on the following? ✔Correct Answer-SMACNA
HVAC Duct Constructions Standards (Mech Chp 6 pg 71)
Any appliance in which the products of combustion at the point of entrance to the flue under normal
operating conditions have temperatures of 1000 degrees or less. ✔Correct Answer-Low Heat
Appliance (Mech Chp 2)
Defective materials or parts shall be replaced or repaired in such a manner so as to preserve the
original approval or _____? ✔Correct Answer-Listing (Mech Chp 3)
What is the minimum insulation value for a residential return air duct in Wilmington, North Carolina
when the duct is located in a sealed crawlspace? ✔Correct Answer-None Required (Energy R22)
When metal duct is used in a single-family and two-family dwellings and townhouses, metal straps
must be used to support the duct a maximum of _____ inch intervals? ✔Correct Answer-64 inches
(Mech Chp 6)
All heat pumps installed in North Carolina that utilize electric resistance heaters to provide
supplemental heat when the heat pump is operating below balance point must have _____ to keep
the heaters off when operating above balance point. ✔Correct Answer-Controls (Energy C-37)
1.25 inch diameter brass tubing and smaller shall be supported every _____ feet when in a horizontal
position? ✔Correct Answer-6 feet (Mech Chp 3)
The minimum duct insulation requirement for commercial duct work in unconditioned space located
inside the building is? ✔Correct Answer-R6 (Energy Chp 4)
High pressure refrigerant will _____ upon giving up its heat of compression and vaporization.
✔Correct Answer-Condense (General Knowledge)
Attics containing appliances shall be provided with a clear and unobstructed passage at least _____
high along the entire length of the passageway. ✔Correct Answer-30 inches (Mech Chp 3)
A commercial building has a roof that is 14 ft above grade and the roof has a four foot parapet all the
way around the roof. Does the Code require a permanent means of access? ✔Correct Answer-Yes
(Mech Chp 3)
You are replacing a 480,000 btu/hr RTU cooling unit in Mecklenburg County, North Carolina on a
building that contains light manufacturing and some office space. Do you need to include outdoor air
economizer in the bid? ✔Correct Answer-Yes (Energy Chp 4)
You are installing a 7.5 ton AHU in a commercial building. The unit has a 1 inch condensate
connection. What is the minimum size condensate drain line you can run by Code? ✔Correct
Answer-1 inch (Mech Chp 3)
