Exam (elaborations)
NATE CORE EXAM QUESTIONS AND ANSWERS 2024
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NATE CORE EXAM QUESTIONS AND ANSWERS 2024
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NATE CORE EXAMThe normal dividing line for voltage changes in a schematic is the
___________________ - ANSWERS-Transformer
The part of a schematic that lists and explains the system components is called
the ______________ - ANSWERS-Legend
Relays and contactors are ______________________ control switches -
ANSWERS-Electrically operated
A _______________ circuit allows the same current to flow through all of the
components - ANSWERS-Series
A _____________ circuit has multiple paths for current flow - ANSWERS-Parallel
What types of circuits are primarily used in control and safety applications? -
ANSWERS-Series-parellel
When testing with a voltmeter, you should place the meter _________________ -
ANSWERS-In parallel with the circuit being tested
,What does a resistance reading of 0 ohms mean? - ANSWERS-There is a short
circuit
When you use an ohmmeter, the circuit being measured must be
__________________ - ANSWERS-Isolated from all energy sources
When you test a switch with an ohmmeter, a reading of _______________
indicates that the switch is closed - ANSWERS-0 ohms
ON all meters, digital and analog, the scale used should indicate the measurement
_________________ - ANSWERS-Close to the middle of the range
When testing across a closed switch in an energized circuit, you should read
_______________ - ANSWERS-0 V AC
When using a standard clamp-on ammeter, you should _________________
before taking a reading - ANSWERS-Make sure that the jaws are closed
When testing compressor windings, you take the following readings: C to R: 2
ohms, C to S: infinite resistance, R to S: infinite resistance.... What is the
diagnosis? - ANSWERS-The start winding is open
Capacitance meters must be used on capacitors _________________ - ANSWERS-
That have been removed from the circuit
, When testing a thermostat wire that has been removed from the circuit, you
measure 0 ohms between red and white. This indicates that _________________
- ANSWERS-There is a short
When testing with an ammeter, you should place the meter
____________________ - ANSWERS-In series with the circuit being tested
Lever tubing benders are best used for: - ANSWERS-Soft drawn copper tubbing
The primary purpose for bringing outdoor air into residential air distribution
system is to: - ANSWERS-Provide fresh air to a conditioned space
What motor design is used on a variable speed motor? - ANSWERS-Brushless DC
Assuming that a circuit is energized, what voltage will be read across an open
switch? - ANSWERS-Applied voltage
The input side of a step-down transformer is also properly called the: - ANSWERS-
primary side
Electrical current is measured in - ANSWERS-amperes
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