Electrical Systems Final Exam
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST] 100%
GUARANTEED PASS
What do the acronyms AC & DC stand for and what is the main difference between the two? -
CORRECT ANSWER-Alternating Current & Direct Current. Electrons flow in one direction in DC
and in AC they flow forward and then backward a little bit.
What is the function of the hot wire? - CORRECT ANSWER-The hot wire is the conductor
providing volts.
What is the function of the neutral wire? - CORRECT ANSWER-It provides return path for the
volts
What is one reason that you would use three phase power? - CORRECT ANSWER-It costs less to
transport, motors are smaller and cheaper and & three phase has consistent power
What are the two main reasons that we use AC current today? - CORRECT ANSWER-It is cheaper
and you can modify voltage
The tighter the coil is on the transformer - CORRECT ANSWER-the higher the voltage
A cycle within electricity goes from 0-360 degrees how many cycles in a second is standard in
the United States - CORRECT ANSWER-60 Hertz
, What two principles are key to a transformer - CORRECT ANSWER-Electromagnetic &
Electromagnetic induction
Motors or computers on AC current systems can create an inductive load which caused a phase
shift between the voltage and the current, because of this what is the result to power supply? -
CORRECT ANSWER-Power is waster
What is apparent power? - CORRECT ANSWER-Power available to use
What is reactive power? - CORRECT ANSWER-Garbage power, no work done
What is a real power? - CORRECT ANSWER-The power that actually does work
A double circuit breaker will have 240 Volts of power on an electrical panel that has two 120 V
hot bus barr. (T or F) - CORRECT ANSWER-True
At a power station what type of transformer will exist? - CORRECT ANSWER-Step Up
At residential and commercial locations what kind of transformers will exist? - CORRECT
ANSWER-Step Down
With regards to a generator what is the function of an Uninterruptible Power Supply (UPS)? -
CORRECT ANSWER-It is used to make sure that at no point the power given to the generator
stops
With regards to a generator what is the function of an Automatic Transfer Switch (APS)? -
CORRECT ANSWER-It is used to transfer the power from your main power source to the
generator and switches the generator on.
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST] 100%
GUARANTEED PASS
What do the acronyms AC & DC stand for and what is the main difference between the two? -
CORRECT ANSWER-Alternating Current & Direct Current. Electrons flow in one direction in DC
and in AC they flow forward and then backward a little bit.
What is the function of the hot wire? - CORRECT ANSWER-The hot wire is the conductor
providing volts.
What is the function of the neutral wire? - CORRECT ANSWER-It provides return path for the
volts
What is one reason that you would use three phase power? - CORRECT ANSWER-It costs less to
transport, motors are smaller and cheaper and & three phase has consistent power
What are the two main reasons that we use AC current today? - CORRECT ANSWER-It is cheaper
and you can modify voltage
The tighter the coil is on the transformer - CORRECT ANSWER-the higher the voltage
A cycle within electricity goes from 0-360 degrees how many cycles in a second is standard in
the United States - CORRECT ANSWER-60 Hertz
, What two principles are key to a transformer - CORRECT ANSWER-Electromagnetic &
Electromagnetic induction
Motors or computers on AC current systems can create an inductive load which caused a phase
shift between the voltage and the current, because of this what is the result to power supply? -
CORRECT ANSWER-Power is waster
What is apparent power? - CORRECT ANSWER-Power available to use
What is reactive power? - CORRECT ANSWER-Garbage power, no work done
What is a real power? - CORRECT ANSWER-The power that actually does work
A double circuit breaker will have 240 Volts of power on an electrical panel that has two 120 V
hot bus barr. (T or F) - CORRECT ANSWER-True
At a power station what type of transformer will exist? - CORRECT ANSWER-Step Up
At residential and commercial locations what kind of transformers will exist? - CORRECT
ANSWER-Step Down
With regards to a generator what is the function of an Uninterruptible Power Supply (UPS)? -
CORRECT ANSWER-It is used to make sure that at no point the power given to the generator
stops
With regards to a generator what is the function of an Automatic Transfer Switch (APS)? -
CORRECT ANSWER-It is used to transfer the power from your main power source to the
generator and switches the generator on.
