Ac Power

Question 1

What does AC stand for?

Answer 1

Alternating Current

Question 2

What direction does AC travel through a conductor?

Answer 2

Both

Question 3

List 2 advantages of AC over DC.

Answer 3

Equipment can be lighter.
Using transformers, voltage can be provided at different values easier.

Question 4

The speed at which AC changes direction is called…?

Answer 4

Frequency

Question 5

The level to which the voltage or current rises to is called…?

Answer 5

Amplitude

Question 6

How are AC cycles per second expressed?

Answer 6

Hertz

Question 7

What are the values of the ships main electrical supplies?

Answer 7

3 phase
450 volts
60 hertz

Question 8

Draw the frequency equation.

Answer 8

Time(seconds)=1/frequency

Question 9

What is the unit of inductance? But what are more common values?

Answer 9

Henry
Milli-Henries and Micro-Henries

Question 10

Draw and label an AC waveform.

Question 11

Draw and label a Bar Magnetic and a Horseshoe Magnetic.

Question 12

Draw and label, showing the effects on the Magnetic Flux, when Magnets of equal poles are brought together. (fig 5.1)