Nate core exam ACTUAL QUESTIONS
AND CORRECT ANSWERS
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
AND CORRECT ANSWERS
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
