Resistors functioning as _____ are used in applications involving field-effect transistors (FETs) and multirange voltmeter circuits.
A. voltage dividers
B. current dividers
C. voltage multipliers
D. current multipliers
Answer: A
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The purpose of a(n) ____________________ is to detect a potentially fire-producing arcing condition anywhere in the circuit wiring of the dwelling or in equipment attached to the circuit.
Fill in the blank(s) with the appropriate word(s).
Stocker operations feed little or no grain.
Answer the following statement true (T) or false (F)
When hysteresis is present in intermittent controllers, which of following statements is false?
A) The hysteresis eliminates the dead zone in on-off controllers. B) The hysteresis causes the controller to drive the PV output value above the set point when the controller is on. C) Two-position control adds hysteresis to the on-off controller operation. D) The hysteresis lets the PV fall below the set point when the controller is off.
Before opening the compressor crankcase to take an oil sample, you should:
A) Get the sample tube ready because the oil comes out very quickly under pressure. B) Increase the crankcase pressure with nitrogen to at least 100 psig. C) Position yourself directly in front of the drain port. D) Valve off the compressor and recover the refrigerant down to 1—2 psig.