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Wet cargo operations > Chapter 2 > Flashcards

Chapter 2 Flashcards

1
Q

Where is smoking not allowed

A

On the open deck

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2
Q

Galley equipment must be approved and the galley location assessed in
relation to the possibility of what?

A

hydrocarbon gas entering.

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3
Q

What must portable electric equipment be if it is to be used on open deck

A

Of an approved type

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4
Q

Flashlights and other portable battery operated equipment must be of a what?

A

Approved type

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5
Q

Radios, cameras containing batteries, mobile phones etc. must not be used
where?

A

Outside of accommodation

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6
Q

Main radio installation and radars may induce what?

A

electrical potentials in unearthed metallic ‘receivers’(rigging,
derricks etc.) up to 500 metres for MF & HF transmissions

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7
Q

GMDSS equipment is not normally considered a problem due to what?

A

transmission frequency used

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8
Q

Main radio transmitters should be earthed in?

A

Port and not used

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9
Q

Radars should not be used where?

A

In port

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10
Q

VHF radio transmissions are not considered hazardous on what setting?

A

Low power setting

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11
Q

The hazardous area is the full width of the cargo tank deck and its’ full
length plus what?

A

a distance of 3 metres forward and aft of this area,
also for a height of 2.4 metres above the tank deck and within 3 metres of any
opening or potential opening in or on the tank deck

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12
Q

Guidance on electrical equipment approvals is given where?

A

in the International Electrotechnical Commission Standard 60092-502.

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13
Q

For the purposes of approval the ship is assessed in three zones (0,1 & 2)
depending on what?

A

the likelihood of flammable gas being present

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14
Q

All approved electrical equipment must be tested by an __________ ____________
and issued with a certificate. The equipment will be marked accordingly

A

Approved authority

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15
Q

What can static electricity produce?

A

Large voltages

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16
Q

What creates static charge

A

Two dissimilar materials coming into contact with each other
Large static charges are created when the materials are then separated

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17
Q

Accumulation of static charge depends on what?

A

Level of impurities The more
the number of impurities the easier the charge decays or relaxes

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18
Q

Clean oil products have fewer __________ than dark oils and so are static accumulates.

A

Impurities

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19
Q

What happens to a static charge over time

A

It decays

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20
Q

What must happen to the accumulated static charge in order for it to make a spark?

A

It must be discharged

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21
Q

A double electrode discharge is more __________ than a single electrode
discharge as the discharge is more ________

A

Dangerous
Focused

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22
Q

Precautions against static electricity

_______ initial flow rates for static accumulator cargoes – less than _ m/sec

A

Reduce
1

23
Q

Precautions against Static
Metal sounding tapes should be __________ to the ships structure before
inserting into tanks

A

grounded

24
Q

Precautions against static electricity
Metal _______ on lengths of hose or pipelines should be bonded __________
by means of a wire or a bonding strap

A

Flanges
Electrically

25
Q

_________-__________ charged mists can be created by agitating oil in cargo
tanks

A

Electro-statically

26
Q

Operating in ________ conditions avoids a static charge igniting a flammable
Atmosphere

A

Inerted

27
Q

All tankers are now constructed with the accommodation and engine room
___ of the cargo tanks and pump room

A

aft

28
Q

The ship is divided into two areas:

A

The hazardous and gas safe areas.
The boundary between the two is the front of the accommodation

29
Q

It is essential that hydrocarbon gas is prevented from entering where?

A

the gas safe area due to the presence of oxygen and sources of ignition

30
Q

Sources of ignition must be avoided in the cargo tanks and pumproom due
to what?

A

the possible presence of hydrocarbon vapour and air

31
Q

The above deck area must be kept free of hydrocarbon gas due to what?

A

the possibility of ignition sources and the toxic gas effect on personnel

32
Q

The pump room is a particularly sensitive area as it is what?

A

the interface between
the hazardous and gas safe area

33
Q

When preparing steel work for painting on the deck of a loaded tanker can a chipping hammer be used?

A

Yes, but not on pipelines

34
Q

You are in an enclosed space on an oil tanker. Your personal gas monitor starts beeping. What do you do?

A

Leave the space and tell everybody else to leave too

35
Q

When installing electrical equipment on tankers the regulations refer to Zones 0, 1 and 2. Which of these zones represents the greatest hazard level

A

Zone 0

36
Q

I nside a cargo tank on a tanker what could cause an electrically charged mist in the atmosphere?

A

Tank washing

37
Q

If a tank is inerted to less than 5% Oxygen what precautions are required against static when gauging and sampling equipment can be lowered into the tank?

A

None

38
Q

An accumulation of static charge can discharge and cause a spark. The type of discharge most likely to ignite a flammable atmosphere is called a

A

Double electrode discharge

39
Q

Which type of extinguishing medium does an oil tanker typically have on deck?

A

Foam

40
Q

The ship and the shore are at different electrical potentials. When the shore pipeline is connected to the ship there is a risk of a spark. This is controlled by the use of:

A

Insulation flange

41
Q

Hot work may include operations which require. what?

A

Heat
Sparks
Grinding
Open flames

42
Q

Any metallic equipment which is to be lowered into a tank, such as an ullage tape, must be

A

Earthed before it enters the tank

43
Q

Charge accumulation in pipelines can be prevented doing what?

A

Bonding pipelines together and to the deck

44
Q

Which convention describes the safety aspect of required construction and design standards on oil tankers?

A

SOLAS Chapt ii

45
Q

All for the requirements for a spark to occur from static

A

Discharge
Separation
Accumulation

46
Q

EX approval types vary based on hazard level. Which ‘zone’ is the most hazardous?

A

Zone 0

47
Q

How do you identify electrical equipment which is suitable for use in a hazardous area?

A

‘Ex’ markings

48
Q

Which publication would you refer to for further guidance on loading static accumulating oils?

A

ISGOTT

49
Q

ISGOTT defines hot work on tankers

Select all of the following options which would be considered as hot work

A

Welding
Grinding
Burning with oxyacetylene

50
Q

Hot work is not permitted

A

There is an alternative method of repair

A work permit has not been completed

51
Q

Charge accumulation depends of the conductivity of the liquid. Which cargo loses it’s accumulated charge the fastest?

A

Crud oil

52
Q

Which type of anodes are permitted in cargo tanks on tankers?

A

Zinc

53
Q

Charge separation occurs when dissimilar materials move against each other. Select all of the following examples which could cause charge separation on a tanker

A

Running a man made fibre rope through rubber gloves

Liquid flowing through a pipeline

54
Q
A

Wet cargo operations (9 decks)

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