When a line-duty overload protecting a heater detects an overload, it:
A) Breaks the heater. B) Cuts power to a relay which powers the heater.
C) Breaks the power line to the house. D) Breaks the line voltage to the heater.
D
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Due to the nature of the control circuit of the electrical and mechanical interlocking system, it is impossible for the reverse contacts to close until the ____________________ contacts are open.
Fill in the blank(s) with the appropriate word(s).
What type of boiler is most commonly used in the process industries?
A. Water tube B. Waste heat C. Fire tube D. Steam tube
It is nearly impossible to overfill a differential with fluid because _____.
a. a relief valve will vent any excess fluid overboard b. it can hold many gallons of excess fluid without damage c. the fluid would run out of the fill port before it can be overfilled d. the fluid is purchased in containers that hold the perfect amount
Effective business letters include a(n) _____, which is a statement of what you want or need from the recipient
a. call to action b. instruction c. suggestion d. to-do list