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P+D > Q1 > Flashcards

Q1 Flashcards

1
Q

How many diesel generators on generic distribution system?

A

4

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2
Q

EDC stand for?

A

Electrical distribution centre

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3
Q

How many EDCs on generic distribution system?

A

4

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4
Q

MCCB stand for

A

Moulded case circuit breaker

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5
Q

5 main breakers?

A

Supply breaker, shore supply/ship alongside breaker, bud bar linking breaker, feeder breaker

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6
Q

What is the power book and when’s it used

A

Shows the distribution of 440v services and used when tracing which services are fed from fuse panels, transformers, MCCB and EDC

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7
Q

What is the lighting book

A

Shows 115/230v and traces where services are fed from

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8
Q

What is the reference book

A

Lists fittings symbols and pattern numbers

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9
Q

Ration for 440v

A

3:1

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10
Q

Ratio for 115v

A

2:1

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11
Q

What’s breaker discrimination

A

The breaker closest to the fault would trip

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12
Q

MCR stand for

A

Machinery control room

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13
Q

PCP and SCP stand for?

A

Primary control position and secondary control position

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14
Q

Metres fitted to a switchboard

A

Voltmeter
Ammeter
KW meter
Frequency meter
Syncroscope

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15
Q

Where are breaker operating switches found and what are they called

A

Discrepancy switches in the PCP

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16
Q

Describe the connection of shire supply

A
  • Send a signal 24 hours before
  • Obtain permit to work
  • Rack out the breakers
  • Check it’s dead
  • Obtain castel key
  • Test the shore supply cables
  • Shore supplies cables are brought on ship and secured
  • cables are connected to the shore supply box
  • inform the dockyard to switch on the power
17
Q

Rules when earthing the ship

A

Must be earthed to jetty or ship alongside
More than half the length of the ship
Gangway must be earthed

18
Q

What’s used to confirm correct phase rotation

A

Phase sequence indicator
Light on the right should be brighter

19
Q

What is motor rotation is wrong

A

Motor would run backwards

20
Q

3 types of hand changeover switches

A

Normal/alternate
Normal/emergency
Normal/alternate/emergency

21
Q

3 kinds of changeover switches

A

ACOS
HCOS
ROCOS

22
Q

What and where are 440v earth testing facilities found

A

Earth indicator light in switchboard
Some have audible alarms

23
Q

Why are there separate 115 testing facilities

A

115v is a transformed supply and isn’t secondary winding isn’t connected to the primary winding

P+D (4 decks)

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