A(n) ____________________ contains two circuits. One circuit is in series with the armature and has the armature current flowing through its thermal sensor or heating element; the second circuit is the control circuit with a control contact.
Fill in the blank(s) with the appropriate word(s).
thermal overload relay
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Identify the four methods of troubleshooting and list the most important feature to each.
What will be an ideal response?
Describe the procedure involved in sketching curved entities such as arcs and circles.
What will be an ideal response?
Technician A says all pressure differential valves must be manually recentered after bleeding. Technician B says a recentering spring is used on some pressure differential valves. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
Why should oil or grease never be used to lubricate oxygen or acetylene regulators?
A) It can react with certain chemicals or materials and result in an explosion. B) It can result in valve damage due to corrosion. C) It will result in the loss of the manufacturer's warranty. D) It decreases the accuracy of the gauges.