Heat Pump ESCO Exam Questions and Answers Already Passed
What unit of measure indicates pressures below atmospheric? - Answers hg, inches of mercury, PSIA,
psia, in. hg, in. HG, in. Hg, inches HG, inches Hg, inches hg
Atmospheric pressure is
______________
psia at sea leve - Answers 14.7
Refrigeration is defined as the movement of ___________________
from a area where its not wanted, to an area where it is less objectionable. - Answers heat
As refrigerant absorbs heat, it changes from a
__________________ to a _______________
. - Answers liquid vapor
Superheat vapor is a gas that has been heated to a temperature ____________
its saturation point. - Answers above
During the heating cycle, the outdoor coil of a heat pump become the ___________________ - Answers
evaporator
During the cooling cycle, the indoor coil of a heat pump becomes the _____________ - Answers
evaporator
When a heat pump system goes into defrost mode, what process takes place so that system can
continue to provide heat to the structure? - Answers aux heat
A measurement of the speed or motion of molecules in a substance called. - Answers temperature
Name two common temperature scales used to measure air temperature. - Answers Celsius,
Fahrenheit
What does ambient mean? - Answers tempature surrounding an area or object
What is a wet bulb temperature used for? - Answers to measure the moisture in the air and air temp
What is dew point? - Answers point at which condensation occurs.
What is pressure? - Answers force per unit area
What does PSIG stand for? - Answers per square inch gauge
, The three methods of heat transfer are - Answers convection, conduction
, and radiation
.
Heat always travel from - Answers hot to cold
What method does refrigerant reject heat - Answers condenser
What is the pressure of 410A at 30
F? - Answers 97.5
What is the temperature of 410A at 418 psig - Answers 120
In order list the three processes that refrigerant goes through in the condenser - Answers desuperheat,
vapor to liquid, and subcooled
In order list the two processes that refrigerant goes through in the evaporator - Answers evaporation,
then vaporized.
What are the differences between a heat pump and regular air conditioner? - Answers a heat pump has
a reverse cycle refridgeration system meaning allows hot gas where the cool gas is coming from but
works just like a ac system in the cooling system
test esco section 1
An air cooled condenser condenses to liquid at - Answers 20-30° above ambient
An air cooled evaporator evaporates liquid to a vapor at - Answers 35 below ambient
Airflow across the evaporator should be - Answers 450 cfm/ton
Azeotropic Blend refrigerants need to be charged in - Answers vapor,liquid
How much heat is still in the air at 0°F? - Answers 85%
If superheat is high the TXV/EEV will - Answers open
If superheat is low the TXV/EEV will: - Answers close
Latent heat can be measured with - Answers nota
Near-Azeotropic Blends need to be charged in: - Answers liquid
psi - Answers pounds per sq inch
What unit of measure indicates pressures below atmospheric? - Answers hg, inches of mercury, PSIA,
psia, in. hg, in. HG, in. Hg, inches HG, inches Hg, inches hg
Atmospheric pressure is
______________
psia at sea leve - Answers 14.7
Refrigeration is defined as the movement of ___________________
from a area where its not wanted, to an area where it is less objectionable. - Answers heat
As refrigerant absorbs heat, it changes from a
__________________ to a _______________
. - Answers liquid vapor
Superheat vapor is a gas that has been heated to a temperature ____________
its saturation point. - Answers above
During the heating cycle, the outdoor coil of a heat pump become the ___________________ - Answers
evaporator
During the cooling cycle, the indoor coil of a heat pump becomes the _____________ - Answers
evaporator
When a heat pump system goes into defrost mode, what process takes place so that system can
continue to provide heat to the structure? - Answers aux heat
A measurement of the speed or motion of molecules in a substance called. - Answers temperature
Name two common temperature scales used to measure air temperature. - Answers Celsius,
Fahrenheit
What does ambient mean? - Answers tempature surrounding an area or object
What is a wet bulb temperature used for? - Answers to measure the moisture in the air and air temp
What is dew point? - Answers point at which condensation occurs.
What is pressure? - Answers force per unit area
What does PSIG stand for? - Answers per square inch gauge
, The three methods of heat transfer are - Answers convection, conduction
, and radiation
.
Heat always travel from - Answers hot to cold
What method does refrigerant reject heat - Answers condenser
What is the pressure of 410A at 30
F? - Answers 97.5
What is the temperature of 410A at 418 psig - Answers 120
In order list the three processes that refrigerant goes through in the condenser - Answers desuperheat,
vapor to liquid, and subcooled
In order list the two processes that refrigerant goes through in the evaporator - Answers evaporation,
then vaporized.
What are the differences between a heat pump and regular air conditioner? - Answers a heat pump has
a reverse cycle refridgeration system meaning allows hot gas where the cool gas is coming from but
works just like a ac system in the cooling system
test esco section 1
An air cooled condenser condenses to liquid at - Answers 20-30° above ambient
An air cooled evaporator evaporates liquid to a vapor at - Answers 35 below ambient
Airflow across the evaporator should be - Answers 450 cfm/ton
Azeotropic Blend refrigerants need to be charged in - Answers vapor,liquid
How much heat is still in the air at 0°F? - Answers 85%
If superheat is high the TXV/EEV will - Answers open
If superheat is low the TXV/EEV will: - Answers close
Latent heat can be measured with - Answers nota
Near-Azeotropic Blends need to be charged in: - Answers liquid
psi - Answers pounds per sq inch
