Nate core exam questions and answers
100%Correctly verified answers latest
update 2025/2026 RATED A+
What are the five basic components to any schematic? - CORRECT ANSWERS 1. A power
supply
2. A path for the power
3. A load or component that operates from the power.
4. A switch or component that interrupts the power to the load.
5. A legend or key that explains what the various symbols and abbreviations used in the schematic
mean.
What are the three basic types of wiring diagrams used in the HVACR trade? - CORRECT ANSWERS
1. The ladder diagram
2. The pictorial diagram
3. The installation diagram
Describe the characteristics of a ladder diagram - CORRECT ANSWERS 1. Provides the most
helpful information for electrical troubleshooting
2.The intention of the overall schematic is to show how the circuit functions not how it actually looks.
Describe the characteristics of a pictorial diagram - CORRECT ANSWERS 1. Usually includes
drawings that more closely resemble the components themselves rather than the symbols.
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 - CORRECT ANSWERS 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
What is a switch? - CORRECT ANSWERS 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? - CORRECT ANSWERS 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 - CORRECT ANSWERS 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 - CORRECT ANSWERS 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? - CORRECT ANSWERS Side by side
arrangement and up and down arrangement
A particular right triangle that has two equal sides. This is a? - CORRECT ANSWERS 45°- 45°-
90°right triangle
Which of the following is typically represented by the two lines on the sides of a diagram? - CORRECT
ANSWERS Each leg of the line or low voltage power
, To change the direction of rotation of a three phase motor, it is necessary to? - CORRECT ANSWERS
Reverse any two of the motor leads
The overload protection of a 10a and ma inputs of a digital used in HVAC work are? - CORRECT
ANSWERS Always the same
As a general rule, a continuity check using an ohmmeter shows continuity by a reading of? - CORRECT
ANSWERS At zero or a specific resistance
How is a voltmeter connected for taking a reading? - CORRECT ANSWERS In parallel with the
voltage to be measured
A service company was blasted in a news article the employees were briefed in a company meeting and
the majority of them nothing was done wrong and supported the company. The employees shown there
were? - CORRECT ANSWERS Loyal
The federal agency that oversees the transportation of pressurized cylinder is? - CORRECT ANSWERS
DOT
The dictionary defines an honest person as one who is free from fraud or deception, which of the
following will hold true? - CORRECT ANSWERS An honest person is fair and their dealings with
other people
A condition that must be met to make an agreement legally binding is? - CORRECT ANSWERS
The agreement must include one promise in exchange for another
Which of the following expresses the difference between a feature in a benefit? - CORRECT ANSWERS
A feature is a special characteristic of a product and a benefit is the value of the customer receives from
using the future
100%Correctly verified answers latest
update 2025/2026 RATED A+
What are the five basic components to any schematic? - CORRECT ANSWERS 1. A power
supply
2. A path for the power
3. A load or component that operates from the power.
4. A switch or component that interrupts the power to the load.
5. A legend or key that explains what the various symbols and abbreviations used in the schematic
mean.
What are the three basic types of wiring diagrams used in the HVACR trade? - CORRECT ANSWERS
1. The ladder diagram
2. The pictorial diagram
3. The installation diagram
Describe the characteristics of a ladder diagram - CORRECT ANSWERS 1. Provides the most
helpful information for electrical troubleshooting
2.The intention of the overall schematic is to show how the circuit functions not how it actually looks.
Describe the characteristics of a pictorial diagram - CORRECT ANSWERS 1. Usually includes
drawings that more closely resemble the components themselves rather than the symbols.
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 - CORRECT ANSWERS 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
What is a switch? - CORRECT ANSWERS 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? - CORRECT ANSWERS 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 - CORRECT ANSWERS 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 - CORRECT ANSWERS 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? - CORRECT ANSWERS Side by side
arrangement and up and down arrangement
A particular right triangle that has two equal sides. This is a? - CORRECT ANSWERS 45°- 45°-
90°right triangle
Which of the following is typically represented by the two lines on the sides of a diagram? - CORRECT
ANSWERS Each leg of the line or low voltage power
, To change the direction of rotation of a three phase motor, it is necessary to? - CORRECT ANSWERS
Reverse any two of the motor leads
The overload protection of a 10a and ma inputs of a digital used in HVAC work are? - CORRECT
ANSWERS Always the same
As a general rule, a continuity check using an ohmmeter shows continuity by a reading of? - CORRECT
ANSWERS At zero or a specific resistance
How is a voltmeter connected for taking a reading? - CORRECT ANSWERS In parallel with the
voltage to be measured
A service company was blasted in a news article the employees were briefed in a company meeting and
the majority of them nothing was done wrong and supported the company. The employees shown there
were? - CORRECT ANSWERS Loyal
The federal agency that oversees the transportation of pressurized cylinder is? - CORRECT ANSWERS
DOT
The dictionary defines an honest person as one who is free from fraud or deception, which of the
following will hold true? - CORRECT ANSWERS An honest person is fair and their dealings with
other people
A condition that must be met to make an agreement legally binding is? - CORRECT ANSWERS
The agreement must include one promise in exchange for another
Which of the following expresses the difference between a feature in a benefit? - CORRECT ANSWERS
A feature is a special characteristic of a product and a benefit is the value of the customer receives from
using the future
