NATE CORE EXAM Questions with 100%
Correct Answers Latest Versions 2025
GRADED A+
How was the crank case heater energized? - It is only on if the
compressor contactor is De-energized
What is the purpose of an RC component? - It is a dual
capacitor used for the compressor and fan motors
In most field wiring diagrams, the color coding of wiring remains
consistent. Which of the following is applicable? - Color
coding is almost always used for low-voltage wiring
Pictorial wiring diagrams typically show components__ - In
their approximate positions in the equipment
A ladder diagram is useful for? - Troubleshooting a unit
An analog VOM meter is an electrical meter that__ - Displays
volts, ohms, or milliamperes on an analog scale
Page 1 of 20
,A digital multi meter marked "auto-ranging" Will automatically set itself
for__ - Reading take and range of values for all volts, amps or
ohms
*Using an attached diagram what purpose does PI/S I serve? -
It is a multi pin connector
How should a technician measure resistance with a digital ohmmeter? -
Disconnect power, electrically isolate the load, and connect
the leads across the load
2. Provides the best indication of the actual positions of the
components in the equipment or control panel.
Describe the characteristics of an installation diagram - 1.
Used primarily By the person installing equipment
2. It normally only shows what the terminal board connections are and
may or may not include any internal wiring of the unit
3. Field wiring Generally represented as Dashed lines.
4. Thicker lines represent line voltage wiring(120/240 V)
5. Thin lines represent low-voltage control wiring
Page 2 of 20
, What is a switch? - A switch is a device that interrupts power
to the load. It may be manually or automatically activated by pressure,
temperature or it may be an electrically controlled switch
What is a load? - A load is a device that consumes power and
converts it into some other form of energy
Describe the side-by-side arrangement four wire diagrams -
Usually arranges motors and other power consuming
components on the right side of the diagram called the "load" side. The
switches and other controllers are placed on the left side of the
diagram called the "line"side.
Describe the up and down schematic arrangement - This type
of arrangement divides the schematic in to high-voltage and low-
voltage sections. Normally the high voltage section is placed on the top
and the low voltage is placed on the bottom of the diagram.
What are the two basic configurations used in schematics? -
Side by side arrangement and up and down arrangement
A particular right triangle that has two equal sides. This is a? -
45°- 45°-90°right triangle
Page 3 of 20
Correct Answers Latest Versions 2025
GRADED A+
How was the crank case heater energized? - It is only on if the
compressor contactor is De-energized
What is the purpose of an RC component? - It is a dual
capacitor used for the compressor and fan motors
In most field wiring diagrams, the color coding of wiring remains
consistent. Which of the following is applicable? - Color
coding is almost always used for low-voltage wiring
Pictorial wiring diagrams typically show components__ - In
their approximate positions in the equipment
A ladder diagram is useful for? - Troubleshooting a unit
An analog VOM meter is an electrical meter that__ - Displays
volts, ohms, or milliamperes on an analog scale
Page 1 of 20
,A digital multi meter marked "auto-ranging" Will automatically set itself
for__ - Reading take and range of values for all volts, amps or
ohms
*Using an attached diagram what purpose does PI/S I serve? -
It is a multi pin connector
How should a technician measure resistance with a digital ohmmeter? -
Disconnect power, electrically isolate the load, and connect
the leads across the load
2. Provides the best indication of the actual positions of the
components in the equipment or control panel.
Describe the characteristics of an installation diagram - 1.
Used primarily By the person installing equipment
2. It normally only shows what the terminal board connections are and
may or may not include any internal wiring of the unit
3. Field wiring Generally represented as Dashed lines.
4. Thicker lines represent line voltage wiring(120/240 V)
5. Thin lines represent low-voltage control wiring
Page 2 of 20
, What is a switch? - A switch is a device that interrupts power
to the load. It may be manually or automatically activated by pressure,
temperature or it may be an electrically controlled switch
What is a load? - A load is a device that consumes power and
converts it into some other form of energy
Describe the side-by-side arrangement four wire diagrams -
Usually arranges motors and other power consuming
components on the right side of the diagram called the "load" side. The
switches and other controllers are placed on the left side of the
diagram called the "line"side.
Describe the up and down schematic arrangement - This type
of arrangement divides the schematic in to high-voltage and low-
voltage sections. Normally the high voltage section is placed on the top
and the low voltage is placed on the bottom of the diagram.
What are the two basic configurations used in schematics? -
Side by side arrangement and up and down arrangement
A particular right triangle that has two equal sides. This is a? -
45°- 45°-90°right triangle
Page 3 of 20
