When used for short circuit protection of motor branch circuits, which of the following must be adjustable and used in conjunction with combination motor starters?
a. Motor short circuit protectors
b. Multi-motor branch circuits
c. Instantaneous trip circuit breakers
d. Circuit interrupters
c. Instantaneous trip circuit breakers
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The person who responds to customer inquiries on the telephone, online, and in person is the ________.
A) Service consultant B) Porter C) Owner D) Cashier
Which circuit is failure is most likely to cause a fuse to blow?
A) Open B) Short to voltage C) High resistance D) Short to ground
In perimeter applications using the variable-air-volume system, the primary air handler provides
A) variable volume and constant temperature. B) variable volume and heating only. C) constant volume and cooling only. D) constant volume and constant temperature.
Pinch-off voltage refers to
A) value of drain-source voltage at which drain current is maximum B) value of drain-source voltage at which drain current remains constant C) value of drain-source voltage at which drain current is minimum D) none of the above