HVAC CONTRACTOR EXAM QUESTIONS
AND ANSWERS
It is important to remember that heating output, in air-to-air heat pump, is directly
related to ________?
Ambient temperature
The issuance of a permit or approval of plans and specifications with in the
requirements of the Mechanical Code shall?
Not be construed as approval of any violationsof this code
Following the refrigerant cycle: After the liquid refrigerant enters the evaporator
through the refrigerant control, the liquid refrigerant pressure starts working
_______?
At a lower pressure
Given: The components and R values for a wall are.
4" brick veneer; R=0.15
4" fiberglass insulation; R=19
outside surface (5mph wind); R=0.02
inside surface; R=0.015
What is the U value of the wall section?
0.052
The ________ is located in the low side of the refrigeration cycle?
Evaporator
, Every pressure relief valve on a mechanical refrigerating system shall be
connected to the refrigerant discharge pipe of the compressor it serves. Where
shall these relief vavles be located?
Between the compressor and the first shutoff valve at the condenser
A thermostatic expansion valve is oversized for a system. Which of the following
results will take place?
The evaporator willalternately be overfed and starved
The minimun pipe size diameter for condensate drain for cooling coils rated at 20
tons or less shall not be less than?
3/4"
A listed device which will shut off the fuel supply to the main burner in the event
of ignition failure is required on gas _______?
Furnace
Exhaust outlets for grease ducts serving commerical food-processing equipment
shall be located at least ______ feet above the adjoining grade level?
10 Feet
Geothermal heat pumps are considered the most efficient conditioning systems
available. These pumps can reduce energy consumption and emissions by over
_______ copared to ait source heat pumps>
40%
Some packaged air conditioners using full hermetic type compressors are fitted
with a thermostatic expansion valve with an internal bleed port. What is the
purpose of the bleed port?
AND ANSWERS
It is important to remember that heating output, in air-to-air heat pump, is directly
related to ________?
Ambient temperature
The issuance of a permit or approval of plans and specifications with in the
requirements of the Mechanical Code shall?
Not be construed as approval of any violationsof this code
Following the refrigerant cycle: After the liquid refrigerant enters the evaporator
through the refrigerant control, the liquid refrigerant pressure starts working
_______?
At a lower pressure
Given: The components and R values for a wall are.
4" brick veneer; R=0.15
4" fiberglass insulation; R=19
outside surface (5mph wind); R=0.02
inside surface; R=0.015
What is the U value of the wall section?
0.052
The ________ is located in the low side of the refrigeration cycle?
Evaporator
, Every pressure relief valve on a mechanical refrigerating system shall be
connected to the refrigerant discharge pipe of the compressor it serves. Where
shall these relief vavles be located?
Between the compressor and the first shutoff valve at the condenser
A thermostatic expansion valve is oversized for a system. Which of the following
results will take place?
The evaporator willalternately be overfed and starved
The minimun pipe size diameter for condensate drain for cooling coils rated at 20
tons or less shall not be less than?
3/4"
A listed device which will shut off the fuel supply to the main burner in the event
of ignition failure is required on gas _______?
Furnace
Exhaust outlets for grease ducts serving commerical food-processing equipment
shall be located at least ______ feet above the adjoining grade level?
10 Feet
Geothermal heat pumps are considered the most efficient conditioning systems
available. These pumps can reduce energy consumption and emissions by over
_______ copared to ait source heat pumps>
40%
Some packaged air conditioners using full hermetic type compressors are fitted
with a thermostatic expansion valve with an internal bleed port. What is the
purpose of the bleed port?
