6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
NATE CORE STUDY GUIDE COMPREHENSIVE
questions answered, 2025 verified graded A+
already passed!
Save
Terms in this set (424)
Which of the following is Oxides of nitrogen
not the product of
incomplete combustion:
An oil trap is required at 8 feet
the base of the discharge
line of the vertical riser is
_____ or above
A diode allows current to True
flow in one direction:
1 Watt = _____ Btu 3.41
Current in a closed circuit resistance
is limited by which of the
following:
An oil separator is located Discharge line
in the _____:
______ is the heat that is Latent heat
absorbed or extracted
when a substance
changes its state:
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,6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
_______ is the temperature at Floc Point
which oil starts to produce
a waxy substance that may
interfere with the
refrigeration system:
1 kWh of electric power is 3412
equivalent to ______ Btu per
hour:
What will be the 6 OHM
resistance in the circuit if
the supply voltage is 30V
and current flowing
through the circuit is 5A:
Gas valves operate at _____ 24V
voltage:
_______ use two special Screw Compressor
helical rotors that
introduce suction vapors
then compress them:
A high pressure steam 15 PSIG
boiler operates at a
pressure greater than ______
:
In Fire tube boiler, which Flue Gas
of the following pass
through the tubes:
1 kilo watt = ______ Btu 3140 BTU
Turning the TXV valve Clockwise
stem in _______ direction
increases super heat:
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,6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
Which of the following Reciprocating Compressor
compressor uses pistons,
cylinders and valves to
compress the refrigerant
gas:
Most of the heat transfer Convection
from the heat exchanger is
by which of the following:
Relays and contactors are Electrically Operated
____ control switches:
Which of the following law Daltons Law
states that the total
pressure of a confined
mixture of gases is the
sum of pressures of each
of the gases in the
mixture:
At 32°F, 1 lb of ice can be 144 BTU
changed to 1 lb of water
by adding ____ Btu
Which of the following series
circuit does not have
multiple paths for current
flow:
Dual voltage three phase 9
motor has _____ number of
terminals
Which one of the Inlet line
following is known as the
line that connects
between the metering
device and the
evaporator:
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, 6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
Approximately _____ 15,000V
voltage is required for
creating a spark on a
spark ignition system:
Which one of the Compressor
following in the
refrigeration cycle
changes the refrigerant
from low pressure gas to
high pressure gas:
Heat transfer that takes Convection
place in liquids and gases
in which of the following:
Which of the following is Manometer
used to measure the
pressure drop across the
air filter:
What will be typical range 4-20 mA
of the current sensor:
RTD which measure True
temperature have a
positive temperature
coefficient:
______ temperature is the Dew Bulb
temperature is the
temperature below which
moisture condense out of
air
Curved boundary In Dew point temperature line
Psychrometric chart
indicates which of the
following:
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NATE CORE STUDY GUIDE COMPREHENSIVE
questions answered, 2025 verified graded A+
already passed!
Save
Terms in this set (424)
Which of the following is Oxides of nitrogen
not the product of
incomplete combustion:
An oil trap is required at 8 feet
the base of the discharge
line of the vertical riser is
_____ or above
A diode allows current to True
flow in one direction:
1 Watt = _____ Btu 3.41
Current in a closed circuit resistance
is limited by which of the
following:
An oil separator is located Discharge line
in the _____:
______ is the heat that is Latent heat
absorbed or extracted
when a substance
changes its state:
https://quizlet.com/1054955146/nate-core-study-guide-comprehensive-questions-answered-2025-verified-graded-a-already-passed-flash-cards/?new 1/49
,6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
_______ is the temperature at Floc Point
which oil starts to produce
a waxy substance that may
interfere with the
refrigeration system:
1 kWh of electric power is 3412
equivalent to ______ Btu per
hour:
What will be the 6 OHM
resistance in the circuit if
the supply voltage is 30V
and current flowing
through the circuit is 5A:
Gas valves operate at _____ 24V
voltage:
_______ use two special Screw Compressor
helical rotors that
introduce suction vapors
then compress them:
A high pressure steam 15 PSIG
boiler operates at a
pressure greater than ______
:
In Fire tube boiler, which Flue Gas
of the following pass
through the tubes:
1 kilo watt = ______ Btu 3140 BTU
Turning the TXV valve Clockwise
stem in _______ direction
increases super heat:
https://quizlet.com/1054955146/nate-core-study-guide-comprehensive-questions-answered-2025-verified-graded-a-already-passed-flash-cards/?new 2/49
,6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
Which of the following Reciprocating Compressor
compressor uses pistons,
cylinders and valves to
compress the refrigerant
gas:
Most of the heat transfer Convection
from the heat exchanger is
by which of the following:
Relays and contactors are Electrically Operated
____ control switches:
Which of the following law Daltons Law
states that the total
pressure of a confined
mixture of gases is the
sum of pressures of each
of the gases in the
mixture:
At 32°F, 1 lb of ice can be 144 BTU
changed to 1 lb of water
by adding ____ Btu
Which of the following series
circuit does not have
multiple paths for current
flow:
Dual voltage three phase 9
motor has _____ number of
terminals
Which one of the Inlet line
following is known as the
line that connects
between the metering
device and the
evaporator:
https://quizlet.com/1054955146/nate-core-study-guide-comprehensive-questions-answered-2025-verified-graded-a-already-passed-flash-cards/?new 3/49
, 6/17/25, 8:37 AM NATE CORE STUDY GUIDE COMPREHENSIVE questions answered, 2025 verified graded A+ already passed! Flashcards | Quizlet
Approximately _____ 15,000V
voltage is required for
creating a spark on a
spark ignition system:
Which one of the Compressor
following in the
refrigeration cycle
changes the refrigerant
from low pressure gas to
high pressure gas:
Heat transfer that takes Convection
place in liquids and gases
in which of the following:
Which of the following is Manometer
used to measure the
pressure drop across the
air filter:
What will be typical range 4-20 mA
of the current sensor:
RTD which measure True
temperature have a
positive temperature
coefficient:
______ temperature is the Dew Bulb
temperature is the
temperature below which
moisture condense out of
air
Curved boundary In Dew point temperature line
Psychrometric chart
indicates which of the
following:
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