Power Flashcards
1
Q
Define power
A
P= VxI
2
Q
Unit for electrical power
A
Watt
3
Q
How many watts per horse power
A
746
4
Q
Danger of constant high current through conductor
A
Overheating causing damage
5
Q
2 types of fuse
A
HRC
cartridge
6
Q
What does a fuse protect from damage
A
The power source
7
Q
What happens in HRC when fuse blows
A
Quartz melts and fills space between melted wire
8
Q
What is electrical potential of the sea
A
0V
9
Q
3 causes of fault in a circuit
A
Dampness
Insulation damaged by heat or age
Accidental damage
10
Q
Why is equipment earthed through the hull
A
So faults will run through the hull and into the sea instead of through whoever touches it
