P&D

Question 1

Can batteries be portable and static

Answer 1

yes they can

Question 2

What are the uses of batteries

Answer 2

Torches
Watches
Hearing aids
Cars/lorries

Question 3

What 2 categories can batteries be split into?

Answer 3

Primary

Secondary

Question 4

What are the 4 main characteristics of a primary battery?

Answer 4

Not rechargeable
Known as ‘dry cells’
Once discharged they are thrown away
Normally small

Question 5

What are the 4 main characteristics of secondary batteries?

Answer 5

Rechargeable
Know as ‘wet cells’
Require specialist recharging equipment
Variety of sizes (AAA up to VERY large)

Question 6

What is the voltage difference of a charge and discharge cell?

Answer 6

discharged: 1.75

charged 2.1

Question 7

What is the difference between charged and discharged per cell

Answer 7

0.35 V

Question 8

What is RICE?

Answer 8

Rationalised Internal Communications Equipment

Question 9

7 types of breakers in distribution system?

Answer 9

Supply breaker
Interconnector breaker
Shore supply/ship alongside breaker
Electric motor breaker
Motor generator feeder breaker
Motor generator supply breaker
Diesel generator alternative supply breaker

Question 10

what is an edp?

Answer 10

electrical distribution panel

Question 11

what are the different types of EDP connected to a type 23

Answer 11

Type 1
Type 2
Type 3

Question 12

What are the two sources of 450V if the motor generators are lost?

Answer 12

Converted diesel generator

Emergency generator

Question 13

Inside the panel on a converted diesel engine there is a switch with four positions, what are these switches for?

Answer 13

440V generator test
440V generator
600V generator
600V generator test

Question 14

What does the switchboard supply?

Answer 14

Steering motors
High pressure salt water pumps
Surgery/sickbay
Smoke clearance exhaust fans
Portable pump sockets

Question 15

Type 3 EDP has what?

Answer 15

Has a single input
Multiple circuits feeding off the input
Is a shedable EDP

Question 16

9 basic components of the electric motor system

Answer 16

Air filter
Cooling fans
Yoke
Compole
Main pole
Armature
Commutator
Brush gear

Question 17

6 stages of electrical propulsion motor cooling

Answer 17

1. Cool air is drawn through a filter into the motor
2. This is done by 2 forced ventilation fans
3. The air is then forced over the main poles, armature, commutator and brush gear
4. The cool air absorbs the heat generated in the motor
5. It is exhausted from the motor at the commutator end
6. The air is then forced through a water cooled heat exchanger into the engine room

Question 18

what does IEP stand for

Answer 18

Integrated Electric Propulsion system