Power Distribution Flashcards
1
Q
- What type of cable is used for casualty power cables
A
THOF-42
2
Q
- What part of the circuit breaker senses the overload and causes it to trip
A
Trip element
3
Q
- What type of cable is used for shore ties?
A
THOF-400
4
Q
- What are the max amps that #14 AWG can carry?
A
15
5
Q
- What is tip gap?
A
Minimum distance between the tips of the contacts when fully open
6
Q
- What does the last digit mean for a fluorescent light bulb number?
A
1/8” diameter
7
Q
- Why should the primary of a PT always be opened before the secondary?
A
To prevent high current buildup
8
Q
- Never replaced a type C fuse with what other type of fuse?
A
Type A or B
9
Q
- What type of overload can you reset as soon as it trips?
A
Electronic
10
Q
- Loud humming or chattering on a relay will warn of what condition?
A
Rust on sealing surfaces
11
Q
- The wipe is a measure of the armature movement from the instant the contacts tips touch until the contacts are?
A
Completely closed
12
Q
- When disposing of fluorescent lamps, what should you never do?
A
break them
13
Q
When replacing lamps in a group, what should you do?
A
Replace them all
14
Q
- Why should shore tie cables be the same length?
A
To avoid voltage unbalance between cables
15
Q
- What type of switches do you need to operate a light from three places?
A
One 4way and two 3 ways
