Power Flashcards
1
Q
What is the formula for power?
A
P=I x V
2
Q
What is the unit of electrical power?
A
Watts
3
Q
How many watts make one horsepower?
A
746
4
Q
Why is all electrical equipment earthed to the hull of the ship?
A
For safety to prevent a possible lethal electric shock
5
Q
What three things can cause an earth fault in a circuit?
A
- Brittle or hard insulation caused by heat or age
- Dampness
- Accidental damage
6
Q
What is the electrical potential of the sea?
A
0 Volts
7
Q
Name two types of fuse
A
- Cartridge Fuse
- High Rupturing Capacity Fuse
8
Q
Label this diagram
A
9
Q
Label this diagram
A
10
Q
What is Power?
A
The rate of doing work
11
Q
Electrical power depends on…
A
- The number of electrons to be moved
- The speed at which the are made to travel
12
Q
What is the power triangle?
A
P= I x V
13
Q
What are resistors rated in?
A
Watts & Ohms
14
Q
What is the purpose of a fuse?
A
To protect the power source
