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EWRB (Electrical Engineering) EPLOYMENT READY STUDY GUIDE QUESTIONS AND ANSWERS.
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EWRB (Electrical Engineering) EPLOYMENT READY STUDY GUIDE QUESTIONS AND ANSWERS.
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EWRB (Electrical Engineering) EPLOYMENTREADY STUDY GUIDE QUESTIONS AND
ANSWERS.
Why are capacitors rated higher voltage than the unit line voltage
✔✔Charging and discharging and series with an inductive load subjects
them to high-voltage
When resistors are wired in parallel
✔✔The voltage will be the same
A high resistance problem can be detected by
✔✔Checking the voltage drop across switches and checking current flow
Compared to the run winding the start winding is constructed of
✔✔Smaller gauge wire than the run winding
The voltage between the stinger leg of a delta transformer and ground is
✔✔208 V
What is the relationship of the run and start capacitor to the start winding
✔✔He the start is in series with the start whining
Like charges
✔✔repel each other
,Fuses are sized by
✔✔volts/amps
Transformers are rated according to
✔✔VA at the secondary
Resistances is
✔✔Composition to current flow
How should a thermostat be connected to the system that has to
Transformers: one in the furnace and one in the air conditioner
✔✔Why are the furnace to Rh and the air conditioner to RC
Open internal motor overload is distinguished by
✔✔Miserable resistance between running start, infinite resistance between
star and common, infinite resistance between run and common
Presidential power supplied by utility companies is
✔✔240 V, single phase, three wire
Fuses and circuit are primary used to protect
✔✔The load
Normally closed set of relay contacts will close
✔✔Power is not applied to the relay coil
, What term describes the outside of a transformer
✔✔Secondary side
An electron has
✔✔negative charge
The capacitor in a permanent split capacitor motor
✔✔Is in series with the start whining
What is the primary purpose of a run capacitor
✔✔To increase the motor efficiency
The resistance of an AC magnet device will have blank resistance than
ohms law predicts
✔✔Much lower
The two principal parts of an AC induction motor
✔✔Rotor and stator
What type of fuses should be used with air conditioning systems?
✔✔Slow blow fuses
Capacitors are rated in
✔✔Microfarads & Volts
What is the primary purpose of the start capacitor
✔✔Increase the motor starting torque
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