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____ measures current in a circuit without disconnecting wires.? - ANSWER
✔ Clamp-on meter
____ should not be disassembled in the field? - ANSWER ✔ Oil Buffers
____ should not be disassembled in the field.? - ANSWER ✔ Oil buffers
A .7 V drop from ___-__-___ is an indication of a good junction? - ANSWER
✔ base-to-emitter
A bayonet gauge can be used to? - ANSWER ✔ check the DBG on a T-rail
installation
A blown AC fuse on a three-phase, full-wave rectifier will cause the DC
voltage to ____? - ANSWER ✔ Decrease
A minus sign in front of a reading of the digital voltmeter indicates what?? -
ANSWER ✔ The positive lead is connected to the negative source
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A motor that can run on both AC and DC? - ANSWER ✔ Universal Motor
A regulated power supply that produces an almost pure DC is called a(n)
____? - ANSWER ✔ Exciter
A safety operated switch is considered a ____? - ANSWER ✔ Primary
Safety Device
A silicone controlled rectifier is an example of a...? - ANSWER ✔ Discrete
electronic component
A single-phase, full-wave rectifier with 12-VAC input will produce how much
DC voltage?? - ANSWER ✔ 108VDC
A squirrel cage motor runs clockwise when connected in ACB phase
sequence. What will the motor do when connected in ABC sequence?? -
ANSWER ✔ The motor will run in the counterclockwise rotation.
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A Three-phase, full wave power supply uses how many rectifiers?? -
ANSWER ✔ 6
A transformer has 728 turns on the primary winding and 56 turns on the
secondary. With 120 volts applied on the primary, what is the output
voltage on the secondary?? - ANSWER ✔ 9.23 volts
A transformer has a primary voltage of 440 volts with 100 turns, and a 15:1
voltage ratio of transformation. With a primary current of 25 amps, what will
be the current in the secondary?? - ANSWER ✔ 375 amps
25 x 15=
A transformer with a primary current of 27amps and a secondary current of
1 amp?? - ANSWER ✔ A step-up transformer
A waveform that has unequal rise and fall times with one being
instantaneous is called a? - ANSWER ✔ Sawtooth
A weight (force) of 5000lbs is placed on a hydraulic plunger having an area
of 25 square inces. WHat is the system pressure?? - ANSWER ✔ 200 psi
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AC induction motors...? - ANSWER ✔ uses a stator to act as a rotating field
All electrical tools should be checked...? - ANSWER ✔ regularly
An electromagnetic field in a generator is created by having current flow in
the ____? - ANSWER ✔ Coils wound around the pole piece
An elevator equipment room that is equipped with fire sprinklers would
require what type of circuit breaker?? - ANSWER ✔ Shunt trip circuit
breaker
An example of a reactivde component that can store energy for long
periods of time, causing electrical hazard even with the power removed
is...? - ANSWER ✔ Capacitor
An overspeed governor...? - ANSWER ✔ grips the rope which
mechanically trips the car safety
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