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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
HSE recommends that O2 gas quads should be reduced to………bar at the source
40bar
26
When oxy arc cutting underwater you will find what safety device in dive control?
Two pole circuit breaker or two pole knife switch.
27
Who is responsible for maintaining health and safety at a dive work site?
The Dive Supervisor
28
Who is the only person onboard that can start a dive?
The Dive Supervisor ACOP, IMCA D022 ( anyone may stop a dive)
29
What influences the length of decompression?
Depth and Time
30
DCI is caused by?
Too fast a decompression with associated factors. Dehydration and incomplete out gassing on repetitive dives
31
A source of radiation is measured in?
Curries
32
Beyond what depth is it compulsory to have a DDC offshore.
All offshore diving operations IMCA D014 no surface diving can be carried out without a two lock DDC
33
For all surface oriented diving, sufficient gas should be available to?
Pressurise both locks of the DDC to a maximum possible treatment depth of 50m. Plus sufficient gas for three complete surface decompression cycles
34
What is the maximum partial pressure of O2 recommended in the ACOP?
1.4 Bar ACOP D014 reduced the max PP02 in 2014
35
Who is responsible for ensuring the risk assessment is carried out prior to the diving project commencing?
Diving Contractor
36
An air sample must be taken from a compressor and analysed for contaminants every?
3 months HSE Div information sheet 9 (Div9) BS EN 12021
37
Compressors and gas transfer pumps should have a visual examination and function test every?
6 months IMC D018. Section 7
38
A pressure vessel should have a thorough internal and external visual and gas leak test to maximum working pressure every?
5 years IMCA D018, Section 9.1
39
Umbilicals must be tested to their maximum working pressure every?
2 years IMCA D018. Section 28
40
What is the safe horizontal distance recommended by IMCA D007 that divers should be away from scaffolding operations?
A minimum distance should be 1.3 times the divers working depth
41
What is the minimum O2 required on IMCA D050 Rev.0.1 for surface oriented diving.
90m3
42
According to the ACOP a diving project is complete when?
The last decompression and bend watch is complete. HSE 1997
43
A standby diver dressed in on deck in the Middle East complains of nausea, headache, and dizziness what would you suspect?
Heat Exhaustion
44
When do 60% of bend cases happen?
3 hours after surfacing
45
How long after a air/ surface dive should a diver be in the immediate vicinity of a DDC
4 hours and immediate reach for the first 12 hours
46
Who issues the letter of appointment to the supervisor for a job.
The Dive contractor and is required by law

Trainee Air Supervisors (1 decks)

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