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HVAC EXCELLENCE - HEAT PUMP - WEEKS 1 AND 2 – COMBINED SET WITH ALL ANSWERS
- Exam (elaborations) • 4 pages • 2024
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HVAC EXCELLENCE - HEAT PUMP - WEEKS 1 AND 2 – COMBINED SET WITH ALL ANSWERS
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HVAC Gas Heat certification exam Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 17 pages • 2024
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A gas furnace is to be installed in a garage. The national standards require that the 
burners and ignition sources must be located ______ above the floor 
: 18 inches 
A good description of how a bi-metal fan switch operates the blower motor on a gas 
furnace is 
: Temperature on- temperature off 
Redundant gas valves used on gas furnaces have 
: Dual gas shut off seats 
Burning one cubic foot of liquefied petroleum gas completely will produce approximately 
______ BTUs 
: 
LP gas has a spe...
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HVAC 101-Heating Fundamentals and Answers for Final Exam Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 5 pages • 2024
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What is an SSU and what does it do? 
: It is a unit located on the side of the first which receives power (120 volts) before 
anything located within the furnace itself. It primarily consists of a switch and a fuse, and 
it is what allows for power to flow to the door switch. Opening the switch on the SSU will 
cut power to everything within the furnace. 
What is an OCPD? Describe its function in detail. 
: An OCPD is an Over-Current Protection Device, and it will protect conductors 
and equ...
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HVAC CONTRACTOR EXAM Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 33 pages • 2024
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An instrument that measures potential differences between 2 points in an electrical 
circuit is called? 
A. potentiometer 
B. thermistor 
C. ohmeter 
D. voltmeter 
: voltmeter 
This device uses a thermal sensing bulb at the outlet of the evaporator to sense 
temperature and control superheat 
A. automatic expansion valve 
B. thermostatic expansion valve 
C. low side float 
D. schraeder valve 
: thermostatic expansion valve 
2 | P a g e 
when installing a reversing valve on a heat pump, how man...
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HVAC Certification Practice Tests Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 3 pages • 2024
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Propane and Butane are _______ than air: 
: Heavier 
What will be the resistance in the circuit if the supply voltage is 30V and current flowing 
through the circuit is 5A 
: 6 ohms 
Temperature at which oil starts to produce a waxy substance that may interfere with the 
refrigeration system 
: Floc point 
What manifold gauge set is used to charge, evacuate, add oil and recover refrigerant 
from a refrigeration and air conditioning system? 
: Yellow hose
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HVAC Electrical Test Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 16 pages • 2024
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Current flow is 
: the flow of electrons in the circuit 
impedance is 
: opposition to alternating current flow 
like charges 
: repel each other 
Any material that will readily release electrons is called 
: a conductor 
the symbol for current is 
: I 
Which of the following materials would best be suited for use as a semi-conductor 
: silicone 
2 | P a g e 
the safety ground conductor is usually color coded 
: black (or bare or green & yellow stripe) 
An electron has 
: a negative charge 
resi...
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HVAC practice test online Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 2 pages • 2024
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Can cause a packaged HVAC unit to run high head pressure? 
: The condenser coil is dirty. 
Condenser coil fins are often damaged by: 
: Hail storms. 
Frequent pressure washing. 
Salt spray. 
Insufficient rinsing after cleaning coils with strong acids and bases. 
Water cooled air conditioning systems: 
: Use building furnished water at a temperature of approximately 80°F to transfer 
heat from water
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HVAC Air Condition Esco Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 16 pages • 2024
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Heat which causes a change in temperature of a substance is called 
: Sensible Heat 
Heat added to a substance without a rise in temperature is called 
: Latent Heat 
Heat added to refrigerant in a vapor state after the evaporation process is called 
: Superheat 
A scroll compressor moved refrigerant by means of 
: Involute spirals 
The movement of heat by way of fluid is called 
: Convection 
The movement of heat through a solid object is called 
: Conduction 
2 | P a g e 
The standard unit for...
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HVACR gas heating esco Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 11 pages • 2024
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using an ohmmeter, there is 120 VAC between high speed and ground wires, this 
indicates 
: open 
if temperature rise is too high... 
: increase fan speed 
how many of the 3 OSHA conditions defining confined spaces must be met 
: all 3 
what causes the temperature limit safety switch to shut off the burner 
: fan motor failure 
flashback indicates 
: the gas is flowing slower than the speed at which burn is occurring 
what type of connector is used to control noise in ductwork 
2 | P a g e 
: v...
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HVAC Contractor prep Test 2 Questions & 100% Verified Answers | Latest Update | Already Graded A+
- Exam (elaborations) • 16 pages • 2024
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The International Mechanical Code considers a "flammable Vapor" to be concentration 
of flammable constituents in the air which exceeds _____________ percent of its 
flammability limit. 
: 25% 
During installation or service of electrical controls, a digital multimeter set to voltage 
must be connected in what manner? 
: In parallell 
Unvented fuel-burning room heaters are NOT permitted in a Group ___________ 
occupancy? 
: A 
According to the Code, smoke detectors shall be installed in re...