
ACR-108 Unit 13 Pre-Assessment
Authored by Randall Graham
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Professional Development
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The liquid-vapor mix in a partial liquid/partial vapor-filled control is referred to as a
Subcooled liquid
Superheated fluid
Flammable fluid
Volatile liquid
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes the makeup of a diaphragm?
Thin, flexible steel
Thick, rigid steel
Thick, flexible steel
Thin, rigid steel
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is created when a set of electrical contacts opens or closes?
An overcurrent condition
A power surge
A complete electric circuit
An electric arc or spark
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A ______ varies its resistance to current flow based on its temperature.
thermistor
thermometer
thermocouple
thermopile
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a “rod and tube”-type control device,
the rod pushes a mechanical linkage to open or close a valve or set of electrical contacts.
the rod, when heated, pushes against the tube to open or close a valve or set of electrical contacts.
the tube pushes a mechanical linkage to open or close a valve or set of electrical contacts.
the mechanical linkage pushes against the tube to open or close a valve or set of electrical contacts.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The component part of a control that operates on the fluid expansion concept is the
thermocouple.
thermopile.
transducer.
diaphragm.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
All of the following devices rely on the principle that different metals expand and contract at different rates except the
thermocouple.
rod and tube.
heat motor valve.
snap disc.
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