What is the condition of a relay coil rated to operate on 24 volts if the coil has a resistance of 50 ohms?

110 final review 2

Quiz
•
Physics
•
University
•
Medium

Robert Hemmila
Used 1+ times
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Good
Open
Shorted
Grounded
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the voltage loss measured across the contacts of a contactor is more than 5% of the line voltage, the contactor __________.
is good
should be replaced
is too large for the application
Has a faulty coil
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What can a technician use to interpret the meaning of the flashing light codes given by the LED on an integrated furnace control board?
Integrated furnace diagnostic module
Diagnostic code legend found on the furnace or online from the manufacturer
Wiring schematic diagram
All of the choices are correct
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following functions is performed by the defrost control during a defrost cycle on a heat pump?
De-energize the outdoor fan motor
Switch the heat pump into the cooling mode of operation by controlling the reversing valve
Energize the supplementary heating
All of the choices are correct
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What may result if the installation technician does not perform proper and thorough start-up and check procedures on newly installed heating and cooling equipment?
Shortened equipment life
Equipment or structural damage
Inefficient or improper operation
All of the choices are correct
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A device used to reverse the flow of refrigerant in a mechanical refrigeration system best describes a ________.
Thermostatic expansion valve
Reversing valve
Check valve
Solenoid valve
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following choices best represents the common size range, in American Wire Gauge (AWG), of thermostat wire used to make field control wiring connections?
#12 to #16
#18 to #20
#26 to #32
#4 to #8
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