nate core Questions and answers
100%Correctly verified answers latest
update 2025/2026 RATED A+
What method of heat transfer does not require fluids or solids? - CORRECT ANSWERS
Radiation (heat waves)
Capillary tubing should only be cut to length using a - CORRECT ANSWERS triangular knife edge
file
Before beginning any electrical checkout procedure, what step must always be taken after the
equipment disconnect or circuit breaker has been turned off? - CORRECT ANSWERS
When making a flare, the height of the tubing above the flaring block is critical because a flare with too
much starting height will - CORRECT ANSWERS not fit into the flare nut
Dew point is - CORRECT ANSWERS temperature in which water vapor condense
the temperature most often used by customers when discussing human comfort is - CORRECT ANSWERS
Dry Bulb
Which meter should a technician use to determine whether or not a set of contacts are open in an
energized circuit? - CORRECT ANSWERS Volt meter
Pictorial wiring diagrams generally show components - CORRECT ANSWERS in their
approximate positions in the equipment
A ladder schematic is useful for - CORRECT ANSWERS troubleshooting a unit
, A digital electrical multimeter marked "autoranging" will automatically set itself for - CORRECT
ANSWERS Reading voltage and range when connected to a voltage source
24v transformer with 5:1 turns ratio,
Primary voltage 120v
In the event of a 4% primary voltage drop, what will be the secondary voltage?
Np/Ns=Ep/Es. - CORRECT ANSWERS answer: 23.04
24 x 5 = 120 5:1 turn ratio
120 x .04 = 4.8 4% voltage drop
120- 4.8 = 115.2 new primary voltage
115.2 /5= 23.04 new secondary voltage
To properly test the accuracy of a thermometer, it should be immersed in - CORRECT ANSWERS
Ice water bath
What is typically represented by the 2 lines on the side of a ladder diagram - CORRECT ANSWERS
Each leg of line voltage only
Lever type tubing ae best used for - CORRECT ANSWERS Soft drawn copper tubing
The heat that causes a thermometer reading to change is called - CORRECT ANSWERS Sensible
heat
Material that is used over roof beams or rafters as a base for the roofing is called - CORRECT ANSWERS
Sheathing
100%Correctly verified answers latest
update 2025/2026 RATED A+
What method of heat transfer does not require fluids or solids? - CORRECT ANSWERS
Radiation (heat waves)
Capillary tubing should only be cut to length using a - CORRECT ANSWERS triangular knife edge
file
Before beginning any electrical checkout procedure, what step must always be taken after the
equipment disconnect or circuit breaker has been turned off? - CORRECT ANSWERS
When making a flare, the height of the tubing above the flaring block is critical because a flare with too
much starting height will - CORRECT ANSWERS not fit into the flare nut
Dew point is - CORRECT ANSWERS temperature in which water vapor condense
the temperature most often used by customers when discussing human comfort is - CORRECT ANSWERS
Dry Bulb
Which meter should a technician use to determine whether or not a set of contacts are open in an
energized circuit? - CORRECT ANSWERS Volt meter
Pictorial wiring diagrams generally show components - CORRECT ANSWERS in their
approximate positions in the equipment
A ladder schematic is useful for - CORRECT ANSWERS troubleshooting a unit
, A digital electrical multimeter marked "autoranging" will automatically set itself for - CORRECT
ANSWERS Reading voltage and range when connected to a voltage source
24v transformer with 5:1 turns ratio,
Primary voltage 120v
In the event of a 4% primary voltage drop, what will be the secondary voltage?
Np/Ns=Ep/Es. - CORRECT ANSWERS answer: 23.04
24 x 5 = 120 5:1 turn ratio
120 x .04 = 4.8 4% voltage drop
120- 4.8 = 115.2 new primary voltage
115.2 /5= 23.04 new secondary voltage
To properly test the accuracy of a thermometer, it should be immersed in - CORRECT ANSWERS
Ice water bath
What is typically represented by the 2 lines on the side of a ladder diagram - CORRECT ANSWERS
Each leg of line voltage only
Lever type tubing ae best used for - CORRECT ANSWERS Soft drawn copper tubing
The heat that causes a thermometer reading to change is called - CORRECT ANSWERS Sensible
heat
Material that is used over roof beams or rafters as a base for the roofing is called - CORRECT ANSWERS
Sheathing
