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Trainee Air Supervisors > Homework Questions > Flashcards

Homework Questions Flashcards

1
Q

Boyles Law States?

A

At a constant temperature, the volume of a gas is inversely proportional it the absolute pressure

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2
Q

Beyond what depth is it compulsory to have a DDC on a offshore installation?

A

All offshore diving operations
HSE ACOP 1997, IMCA D014

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3
Q

Which of the following personal may not do any other functions during a dive?

A

The standby diver, dressed in on the dive skid.

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4
Q

The minimum amount of compressed air required for surface oriented diving is?

A

Sufficient air for two emergency dives to the full intended depth as a reserve
IMCA D050

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5
Q

All plant and equipment should be inspected by a competent person,

A

Immediately before use.
IMCA D018

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6
Q

An air sample must be taken from a compressor and analysed for contaminates every?

A

3 months
BS EN 12021

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7
Q

Your umbilical length requires to be a minimum distance from a hazard ie: thruster, intake. What is this length?

A

5m
IMCA D010
Diving from a DP vessel

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8
Q

The Superintendent may perform the role of dive Supervisor if?

A

He is qualified as a Supervisor and the dive logbook is signed over.

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9
Q

Which of the following are symptoms of neurological DCI?

A

Weakness and Fatigue
The majority of DCI’s are neurological.

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10
Q

What is the function of the enclose canopy on a wet bell?

A

To provide divers with a air pocket incase of lost of air supply.

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11
Q

The minimum amount of compressed air required for surface oriented diving with a DDC?

A

Sufficient to pressurise both locks to maximum treatment depth plus air for 3 complete surface decompressions.
IMCA D050

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12
Q

After a pulmonary barotrauma, a diver may not return to diving before?

A

3 months after full recovery

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13
Q

Following a successful treatment for DCI a diver should not fly above 8000ft for?

A

24 hours
DMAC 07

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14
Q

Why is Nustagmus and what is it indicative of?

A

Acute Neurological DCI

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15
Q

A divers logbook must be kept for how long after the last entry?

A

2 Years
HAE ACOP 1997

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16
Q

Body tissue receives O2 from?

A

Capillaries

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17
Q

Following a O2 surface decompression dive a diver complains of blurred vision and blind spots. What would you suspect?

A

Acute Neurological DCI

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18
Q

The most common type of DCI is?

A

Neurological

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19
Q

The appearance of a skin rash following a dive is?

A

Requires immediate treatment by compression ( skin bends can mask more serious symptoms)

20
Q

Why is the initial treatment for PAGE?

A

Immediate decompression to 18m on O2. Repeat Nero exam. Prepare to continue down to 50m.
USN TABLE 6a or RN 63

21
Q

What state should a medlock, equipment lock be kept when not in use?

A

On surface both doors closed

22
Q

A Pneumothorax is caused by?

A

Air escaping through the lung surface collecting in the pleural cavity. It can be a CLOSED pneumothorax( over expansion barotrauma or spontaneous pneumothorax) or a OPEN Pneumothorax ( penetrating chest injury). Not all pneumothorax’s become Tension Pneumothorax’s!

23
Q

Which physical area does the OFFSHORE ACOP apply to?

A

From 12 nautical miles from the low water limit to the limit of the UK designated area of the continental shelf.

24
Q

Prior to commencement of any diving operations it is the Supervisors duty to, ?

A

Check all weather, diver logs, certificates and gas supplies
HSE ACOP 1997,
IMCA D014
IMCA D022

25
Q

HSE recommends that O2 gas quads should be reduced to………bar at the source

A

40bar

26
Q

When oxy arc cutting underwater you will find what safety device in dive control?

A

Two pole circuit breaker or two pole knife switch.

27
Q

Who is responsible for maintaining health and safety at a dive work site?

A

The Dive Supervisor

28
Q

Who is the only person onboard that can start a dive?

A

The Dive Supervisor
ACOP,
IMCA D022
( anyone may stop a dive)

29
Q

What influences the length of decompression?

A

Depth and Time

30
Q

DCI is caused by?

A

Too fast a decompression with associated factors.
Dehydration and incomplete out gassing on repetitive dives

31
Q

A source of radiation is measured in?

A

Curries

32
Q

Beyond what depth is it compulsory to have a DDC offshore.

A

All offshore diving operations
IMCA D014 no surface diving can be carried out without a two lock DDC

33
Q

For all surface oriented diving, sufficient gas should be available to?

A

Pressurise both locks of the DDC to a maximum possible treatment depth of 50m. Plus sufficient gas for three complete surface decompression cycles

34
Q

What is the maximum partial pressure of O2 recommended in the ACOP?

A

1.4 Bar
ACOP D014 reduced the max PP02 in 2014

35
Q

Who is responsible for ensuring the risk assessment is carried out prior to the diving project commencing?

A

Diving Contractor

36
Q

An air sample must be taken from a compressor and analysed for contaminants every?

A

3 months
HSE Div information sheet 9 (Div9)
BS EN 12021

37
Q

Compressors and gas transfer pumps should have a visual examination and function test every?

A

6 months
IMC D018. Section 7

38
Q

A pressure vessel should have a thorough internal and external visual and gas leak test to maximum working pressure every?

A

5 years
IMCA D018, Section 9.1

39
Q

Umbilicals must be tested to their maximum working pressure every?

A

2 years
IMCA D018. Section 28

40
Q

What is the safe horizontal distance recommended by IMCA D007 that divers should be away from scaffolding operations?

A

A minimum distance should be 1.3 times the divers working depth

41
Q

What is the minimum O2 required on IMCA D050 Rev.0.1 for surface oriented diving.

A

90m3

42
Q

According to the ACOP a diving project is complete when?

A

The last decompression and bend watch is complete.
HSE 1997

43
Q

A standby diver dressed in on deck in the Middle East complains of nausea, headache, and dizziness what would you suspect?

A

Heat Exhaustion

44
Q

When do 60% of bend cases happen?

A

3 hours after surfacing

45
Q

How long after a air/ surface dive should a diver be in the immediate vicinity of a DDC

A

4 hours and immediate reach for the first 12 hours

46
Q

Who issues the letter of appointment to the supervisor for a job.

A

The Dive contractor and is required by law

Trainee Air Supervisors (1 decks)

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