Melting alloy and bimetallic overload relays are designed to _____.
a. trip an alarm signal
b. keep the motor operating in the event of a sustained overload
c. react to changes in the motor load current
d. divert excessive current to prevent overheating
c. react to changes in the motor load current
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Explain the purpose of the sealer on the outside surface of a seal housing.
What will be an ideal response?
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List the four functions of a furnace gas valve
What will be an ideal response?
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A condensing oil furnace operates at a higher efficiency because part of the heat output is ____.
A. sensible heat B. latent heat C. superheat D. sub-cooling
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