1 | Page
esco heat pump Questions and Correct
Answers
What unit of measure indicates pressures below atmospheric?
Ans: — 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 Ans: — 14.7
Refrigeration is defined as the movement of ___________________
from a area where its not wanted, to an area where it is less
objectionable. Ans: — heat
As refrigerant absorbs heat, it changes from a
__________________ to a _______________
. Ans: — liquid vapor
Superheat vapor is a gas that has been heated to a temperature
____________
its saturation point. Ans: — above
During the heating cycle, the outdoor coil of a heat pump become
the ___________________ Ans: — evaporator
During the cooling cycle, the indoor coil of a heat pump becomes
the _____________ Ans: — 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? Ans: — aux heat
A measurement of the speed or motion of molecules in a
substance called. Ans: — temperature
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, 2 | Page
Name two common temperature scales used to measure air
temperature. Ans: — Celsius,
Fahrenheit
What does ambient mean? Ans: — tempature surrounding an area
or object
What is a wet bulb temperature used for? Ans: — to measure the
moisture in the air and air temp
What is dew point? Ans: — point at which condensation occurs.
What is pressure? Ans: — force per unit area
What does PSIG stand for? Ans: — per square inch gauge
The three methods of heat transfer are Ans: — convection,
conduction
, and radiation
.
Heat always travel from Ans: — hot to cold
What method does refrigerant reject heat Ans: — condenser
What is the pressure of 410A at 30
F? Ans: — 97.5
What is the temperature of 410A at 418 psig Ans: — 120
In order list the three processes that refrigerant goes through in
the condenser Ans: — desuperheat, vapor to liquid, and subcooled
In order list the two processes that refrigerant goes through in the
evaporator Ans: — evaporation, then vaporized.
What are the differences between a heat pump and regular air
conditioner? Ans: — 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
© 2025 All rights reserved
, 3 | Page
An air cooled condenser condenses to liquid at Ans: — 20-30°
above ambient
An air cooled evaporator evaporates liquid to a vapor at Ans: — 35
below ambient
Airflow across the evaporator should be Ans: — 450 cfm/ton
Azeotropic Blend refrigerants need to be charged in Ans: —
vapor,liquid
How much heat is still in the air at 0°F? Ans: — 85%
If superheat is high the TXV/EEV will Ans: — open
If superheat is low the TXV/EEV will: Ans: — close
Latent heat can be measured with Ans: — nota
Near-Azeotropic Blends need to be charged in: Ans: — liquid
psi Ans: — pounds per sq inch
Sensible heat can be measured with Ans: — thermometer
Sub-cool refers to what state Ans: — liquid
Sub-cooling is the degrees Ans: — below boiling point
Superheat is degrees Ans: — above boiling point
Superheat refers to what state Ans: — vapor
The atmosphere exerts a pressure of Ans: — 14.7 psia
The compressor provides Ans: — pressure difference
The seperation of blended refrigerants is called: Ans: —
fractionation
The superheat of a capillary can be Ans: — 5-30°
TXV and EEV are control by: Ans: — superheat
What are the sources of heat transfer Ans: — Radiation
© 2025 All rights reserved
esco heat pump Questions and Correct
Answers
What unit of measure indicates pressures below atmospheric?
Ans: — 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 Ans: — 14.7
Refrigeration is defined as the movement of ___________________
from a area where its not wanted, to an area where it is less
objectionable. Ans: — heat
As refrigerant absorbs heat, it changes from a
__________________ to a _______________
. Ans: — liquid vapor
Superheat vapor is a gas that has been heated to a temperature
____________
its saturation point. Ans: — above
During the heating cycle, the outdoor coil of a heat pump become
the ___________________ Ans: — evaporator
During the cooling cycle, the indoor coil of a heat pump becomes
the _____________ Ans: — 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? Ans: — aux heat
A measurement of the speed or motion of molecules in a
substance called. Ans: — temperature
© 2025 All rights reserved
, 2 | Page
Name two common temperature scales used to measure air
temperature. Ans: — Celsius,
Fahrenheit
What does ambient mean? Ans: — tempature surrounding an area
or object
What is a wet bulb temperature used for? Ans: — to measure the
moisture in the air and air temp
What is dew point? Ans: — point at which condensation occurs.
What is pressure? Ans: — force per unit area
What does PSIG stand for? Ans: — per square inch gauge
The three methods of heat transfer are Ans: — convection,
conduction
, and radiation
.
Heat always travel from Ans: — hot to cold
What method does refrigerant reject heat Ans: — condenser
What is the pressure of 410A at 30
F? Ans: — 97.5
What is the temperature of 410A at 418 psig Ans: — 120
In order list the three processes that refrigerant goes through in
the condenser Ans: — desuperheat, vapor to liquid, and subcooled
In order list the two processes that refrigerant goes through in the
evaporator Ans: — evaporation, then vaporized.
What are the differences between a heat pump and regular air
conditioner? Ans: — 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
© 2025 All rights reserved
, 3 | Page
An air cooled condenser condenses to liquid at Ans: — 20-30°
above ambient
An air cooled evaporator evaporates liquid to a vapor at Ans: — 35
below ambient
Airflow across the evaporator should be Ans: — 450 cfm/ton
Azeotropic Blend refrigerants need to be charged in Ans: —
vapor,liquid
How much heat is still in the air at 0°F? Ans: — 85%
If superheat is high the TXV/EEV will Ans: — open
If superheat is low the TXV/EEV will: Ans: — close
Latent heat can be measured with Ans: — nota
Near-Azeotropic Blends need to be charged in: Ans: — liquid
psi Ans: — pounds per sq inch
Sensible heat can be measured with Ans: — thermometer
Sub-cool refers to what state Ans: — liquid
Sub-cooling is the degrees Ans: — below boiling point
Superheat is degrees Ans: — above boiling point
Superheat refers to what state Ans: — vapor
The atmosphere exerts a pressure of Ans: — 14.7 psia
The compressor provides Ans: — pressure difference
The seperation of blended refrigerants is called: Ans: —
fractionation
The superheat of a capillary can be Ans: — 5-30°
TXV and EEV are control by: Ans: — superheat
What are the sources of heat transfer Ans: — Radiation
© 2025 All rights reserved
