Nate core exam
What are the five basic components to any schematic? correct answers
1. A power
suppl
y
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
theAload.
5. 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.
Providesinformation
helpful the most 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
symbol
s.
2. Provides the best indication of the actual positions of the
components
equipment orincontrol
the
panel.
Describe the characteristics of an installation diagram correct
answers 1.
primarily ByUsed
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
theField
3. unit wiring Generally represented as Dashed
lines.
4. Thicker lines represent line voltage
wiring(120/240
5. V)
Thin lines represent low-voltage control
wiring
What is a switch? correct answers A switch is a device that interrupts
powerItto
load. maythebe manually or automatically activated by pressure,
temperature
be or it controlled
an electrically may
switch
What is a load? correct answers A load is a device that consumes power
and
it converts
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
side of on
thethe left called the
diagram
"line"side.
Describe the up and down schematic arrangement correct answers
This type of divides the schematic in to high-voltage and low-
arrangement
voltage sections.
Normally the high voltage section is placed on the top and the low voltage
is placed
the bottom onof the
diagram.
What are the two basic configurations used in schematics? correct
answers
side Side by and up and down
arrangement
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 correct answers Each leg of the line or low
diagram?
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 acorrect
of? readinganswers At zero or a specific
resistance
How is a voltmeter connected for taking a reading? correct answers In
parallel
voltage with
to bethe
measured
A service company was blasted in a news article the employees were
briefed in meeting
company a and the majority of them nothing was done wrong and
supportedThe
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
The answers must include one promise in exchange for
agreement
another
Which of the following expresses the difference between a feature in a
benefit? A
answers correct
feature is a special characteristic of a product and a benefit is
value of receives from using the
the customer
future
What are the five basic components to any schematic? correct answers
1. A power
suppl
y
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
theAload.
5. 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.
Providesinformation
helpful the most 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
symbol
s.
2. Provides the best indication of the actual positions of the
components
equipment orincontrol
the
panel.
Describe the characteristics of an installation diagram correct
answers 1.
primarily ByUsed
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
theField
3. unit wiring Generally represented as Dashed
lines.
4. Thicker lines represent line voltage
wiring(120/240
5. V)
Thin lines represent low-voltage control
wiring
What is a switch? correct answers A switch is a device that interrupts
powerItto
load. maythebe manually or automatically activated by pressure,
temperature
be or it controlled
an electrically may
switch
What is a load? correct answers A load is a device that consumes power
and
it converts
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
side of on
thethe left called the
diagram
"line"side.
Describe the up and down schematic arrangement correct answers
This type of divides the schematic in to high-voltage and low-
arrangement
voltage sections.
Normally the high voltage section is placed on the top and the low voltage
is placed
the bottom onof the
diagram.
What are the two basic configurations used in schematics? correct
answers
side Side by and up and down
arrangement
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 correct answers Each leg of the line or low
diagram?
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 acorrect
of? readinganswers At zero or a specific
resistance
How is a voltmeter connected for taking a reading? correct answers In
parallel
voltage with
to bethe
measured
A service company was blasted in a news article the employees were
briefed in meeting
company a and the majority of them nothing was done wrong and
supportedThe
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
The answers must include one promise in exchange for
agreement
another
Which of the following expresses the difference between a feature in a
benefit? A
answers correct
feature is a special characteristic of a product and a benefit is
value of receives from using the
the customer
future
