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Bell Diving Supervisors QUESTIONS > Simulator Final Sat Exame > Flashcards

Simulator Final Sat Exame Flashcards

1
Q

1 bar is equivalent to?

a. 750 mmhg
b. 760 mmhg
c. 770 mmhg
d. 740 mmhg

A

a

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2
Q

6 atmospheres gauge is equivalent to?

a. 165 fsw
b. 175 fsw
c. 198 fsw
d. 231 fsw

A

c

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3
Q

A diver suffering from DCI is to be given a total of 5 cycles of 30 minutes treatment mix via BIBS. The BIBS consumption rate is 20 litres/min at surface. The chamber is at 78 msw. How much treatment mix will be used?

a. 26400 m3
b. 264.00 m3
c. 2.64 m3
d. 26.4 m3

A

d

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4
Q

A DDC with a FV of 25m3 is pressurised to 80 msw. The temperature on arrival at 80 msw is 35oC. When the temperature falls to 30aC, what will be the depth of the DDC?

a. 81.3 msw
b. 68.5 msw
c. 70 msw
d. 78.7 msw

A

d

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5
Q

Using a treatment mix with a ppO2 of 2.5 bar at 450 fsw, what %O2 do we require?

a.13%
b.15.5%
c. 17%
d .18.5%

A

c

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6
Q

A liquid absorbs 1 litre of gas at 1 ata. How much will it absorb at 5 ata?

a. 6 litres
b. 5 litres
c. 4 litres
d. 1 litre

A

b

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7
Q

If you double the pressure on a gas on an open bottom container, according to Boyle’s law what will happen to the volume and density?

a. Volume doubles and density doubles
b. Volume remains the same and the density doubles
c. Volume is halved and density is halved
d. Volume is halved and density is doubled

A

d

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8
Q

Using 200 msw gauge, what does the reference marked on the gauge, accuracy +/- 0.25 of 1% refer to in depth?

a. 0.25 msw
b. 0.5 msw
c. 0.75 msw
d. 0.1 msw

A

b

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9
Q

A DDC is at a depth of 350 fsw. The analyser at the surface shows the CO2 to be 300 ppm. What is the surface equivalent %?

a. 3481%
b. 0.038%
c. 0.348%
d. 3.86%

A

c

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10
Q

You have to pressurise a DDC with a FV of 15m3 to 122msw How much gas is required?

a. 55.39 m3
b. 74.4 m3
c. 183 m3
d. 198 m3

A

c

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11
Q

What is the total metabolic O2 consumption for 4 divers for 15 hours at a depth of 75msw?

a. 255 liters
b. 1020 litres
c. 1800 litres
d. 15300 litres

A

c

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12
Q

What is the ppO2 of a DDC at 250 fsw if the O2% is 4%?

a. 0.34 ata
b. 1.0 ata
c. 0.004 ata
d. 0.45 ata

A

a

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13
Q

Which gas would be required to perform a dive to 262 fsw using a ppO2 at 1.2 ata?

a. 12%
b. 12.5%
c. 13.4%
d. 14%

A

c

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14
Q

A DDC loses 12m3 per day from leaks, how many m3 per hour does that relate to?

a. 0.25 m3/hr
b. 0.5 m3/hr
c. 2.88 m3/hr
d. 3.0 m3/hr

A

b

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15
Q

You are to use 8% mix to establish PPo2 of 410mb in a DDC. To what depth would you pressurise on 8%?

a. 20m
b. 25m
c. 15m
d. 35m

A

b

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16
Q

You require 190 bar of 10%. Mixes available are 4%O2 and 14%O2. How much 4% is required?

a. 7.6 bar
b. 114 bar
c. 19 bar
d. 76 bar

A

d

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17
Q

Your company’s ppO2 during decompression is 0.6 bar. At what depth would the O2 reach 21%?

a. 18.5 msw
b. 28.5 msw
c. 2.85 msw
d. 30.0 msw

A

a

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18
Q

You vent a chamber from 75 msw to surface. If the O2 % was 4% at 75 msw, what is the O2% and ppO2 at the surface?

a. 4% and 340 mb
b. 4% and 300 mb
c. 4% and 40 mb
d. 21% and 210 mb

A

c

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19
Q

You are to pressurise a DDC from the surface to 55 msw using 2% O2 and 8% O2. PPO2 required is 400 mb. How deep will you take the DDC on 8% O2?

a. 6.6 msw
b. 13.3 msw
c. 40 msw
d. 48.3 msw

A

b

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20
Q

What O2 % would you have for a diver if the company policy is to have a ppO2 of 0.7 bar, Team 1 @ 40msw, Team 2 @ 175 msw?

a. Team 1 - 14%, Team 2 - 3.78%
b. Team 1 - 17%, Team 2 - 2%
c. Team 1 - 17.5%, Team 2 - 5%
d. Team 1 - 16%, Team 2 - 5.3%

A

a

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21
Q

When increasing the ppO2 from 0.4 bar to 0.5 bar for final decompression, how much would we increase depth by gauge using pure oxygen?

a. 0.5 msw
b. 1 msw
c. 1.5 msw
d. 0.7 msw

A

b

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22
Q

You have a DDC at 250 msw, the O2% is 1.7%. If the DDC is vented to 110 msw, what is the pp02 and O2% at 110 msw?

a. 1.7% - 0.2 bar
b. 1.7% -0.44 bar
c. 1.7% - 1.7 bar
d. 1.7% - 4.42 bar

A

a

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23
Q

IMCA and HSE recommend that oxygen is reduced at source to a maximum of?

a. 30 bar
b. 35 bar
c. 40 bar
d. 60 bar

A

c

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24
Q

When opening a quad, the safest way to do this would be?

a. Open the king valve then all of the cylinders to pressurize the full line.
b. Open all the cylinders then the king valve.
c. Open the king valve fully then close it by a turn, then open all the cylinders valves.
d. Open one valve fully then close it back 1/2 a turn, check for leaks prior to opening the remaining cylinders & before opening the king valve to pressurize the line.

A

d

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25
Q

Gas transfer from the blood to the tissues is from?

a. Heart
b. Veins
c. Arteries
d. Capillaries

A

d

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26
Q

Carbon dioxide production to oxygen consumption is approximately?

a. 1 to 2
b. 2 to 1
c. 1 to 1
d. 3 to 1

A

c

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27
Q

Which constituent in the blood enables the blood to carry oxygen?

a. Red blood cells
b. Plasma
c. Haemoglobin
d. Serum

A

c

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28
Q

An increase in respiratory rate while carrying out heavy work may lead to?

a. An increase in carbon monoxide
b. An increase in carbon dioxide
c. Decrease in CO2
d. Decrease in CO

A

b

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29
Q

Oxygen is used during decompression to?

a. Improve the elimination of inert gas
b. Prevent the formation of bubbles
c. Slow the elimination of inert gas
d. Prevent the onset of barotrauma

A

a

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30
Q

The vital capacity of the lungs is defined as?

a. The volume of air in the lungs at rest
b. The greatest volume of air you can breathe in or out of the lungs in a single breath
c. The greatest volume of air your lungs can hold at rest
d. The volume of air remaining in the lungs following a normal respiration

A

b

Exame question!!!

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31
Q

What is the maximum depth for the use of pure oxygen in a DDC?

a. 10 msw
b. 18 msw
c. 25 msw
d. 50 msw

A

b

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32
Q

Recompression is used in the treatment of gas embolism to?

a. Help improve the circulation of the blood to the brain
b. Reduce the blood flow thereby helping to reduce the swelling within the brain
c. Reduce the size of the bubble causing the embolism
d. Increase the flow of blood through the brain in order to dislodge the offending bubble

A

c

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33
Q

While on BIBS a diver complains of twitching of his facial muscles, dizziness, tunnel vision and difficulty in hearing. Which of the following is the diver likely to be suffering?

a. Pulmonary (chronic) oxygen toxicity
b. Acute (CNS) oxygen toxicity
c. DCI
d. Anoxia

A

b

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34
Q

Which of the following is the IMCA recommended saturation storage depth ppO2 level?

a. 0.21 - 0.35
b. 0.35 - 0.5
c. 0.45 - 0.5
d. 0.6 - 0.9

A

b

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35
Q

During decompression a diver complains of chest pain and difficulty in breathing. You stop the decompression and the symptoms stabilise, recompress and they are relieved, decompression starts again and the symptoms return. What would you suspect the diver is suffering from?

a. Acute oxygen toxicity
b. Chronic oxygen toxicity
c. Interstitial Emphysema
d. Pneumothorax

A

d

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36
Q

Vestibular DCI in mixed gas diving can be caused by?

a. Excessive hard work
b. Nitrox saturation
c. A switch from gas to air
d. A switch from air to gas

A

c

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37
Q

Which of the following actions would you take if during a saturation you notice you were losing depth at a constant rate?

a. Check for leaks
b. Ensure depth is maintained and check for leaks
c. Maintain depth but ignore the leaks as they are within the acceptable limits
d. Inform the superintendent

A

b

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38
Q

Who is the responsible person for the control of a Transfer Under Pressure (T.U.P)?

a. Superintendent
b. Diving supervisor
c. Life support supervisor
d. On shift LST

A

b

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39
Q

During saturation, table tops and toilet areas should be cleaned?

a. Every 3 days or twice a week
b. At bedding changes
c. Only when it is convenient
d. Every 24 hours

A

d

40
Q

During saturation chamber walls, pipework and general cleaning should take place?

a. Every 3 days or twice a week
b. At bedding changes
c. Only when it is convenient
d. Every 24 hours

A

a

41
Q

If a smolder fire (i.e. burning without flame) occurs in the chamber, of the opinions given, what would you instruct the divers to do first?

a. Evacuate the system
b. Go on BIBS and try to extinguish the fire
c. Activate the deluge system
d. Extinguish the fire

A

b

42
Q

In saturation chamber, under normal circumstances and in readiness for an emergency, whose direct control should the decision be to open the supply valve to the BIBS?

a. LST
b. LSS
c. Supervisor
d. Divers in the DDC

A

d

43
Q

Draeger tubes work on the principal of?

a. Colorimetric
b. Paramagnetism
c. Polarography
d. Infra-red absorption

A

a

44
Q

With a DDC in use, but when not passing items in or out of the DDC, the medical lock should be?

a. Kept to depth with both doors closed
b. Kept on surface with exterior door open
c. Kept at depth with interior door open
d. Kept on surface with both doors closed

A

d

45
Q

BSEN 12021 states an air purity check should be undertaken at least?

a. 1 month
b. 3 months
c. 6 months
d. 12 months

A

b

PS: Remember

IMCA: 6 months
HSE: 3 months

46
Q

In the UK, and according to DMAC 21 Rev 2, what is the single maximum saturation period allowed under normal circumstances?

a. 14 days
b. 16 days
c. 28 days
d. 32 days

A

c

47
Q

Bailout bottles & other cylinders taken underwater should have a hydraulic overpressure test to 1.5 times maximum working pressure (or the factor required by the design code or standard if different), plus internal & external visual examination and gas leak test at working pressure, every how often?

a. 6 months
b. 2 years
c. 4 years
d. 5 years

A

D

48
Q

DMAC 012 Rev.2, recommends diving operations should NOT be carried out within certain distances of seismic surveying, what is the minimum distance?

a. 1000 m
b. 1200 m
c. 1500 m
d. A joint risk assessment should be conducted between the operators involved, and the seismic & diving contractors in advance of any joint operation, if the activities will occur within a distance of 30km

A

d

49
Q

A DP vessel can be defined as in NORMAL OPERATIONAL STATUS when which of the following apply?

a. The vessel is under DP control and the DP system is operating normally with all the appropriate back up systems available.

b. When thruster output and total power consumption does not exceed 80% of maximum thrust or total available
power for more than brief and isolated periods.

c. The vessels’ indicated position and heading is within pre-determined limits for all but brief isolated periods.
d. All of the above.

A

d

50
Q

The Hyperbaric Life Boat / Chamber (SPHL or HRC) must be able to sustain the divers for?

a. 24 hours
b. 48 hours
c. 72 hours
d. 1 week

A

c

51
Q

The Bell winch is man riding equipment, normally operated remotely. Part of the specifications for such a winch is?

a. Two combined brake systems, one of which must come on automatically when the power is released from operation
b. Have a ratchet type brake system
c. Have a ratio of 8:1
d. Have two independent power supplies

A

d

PS: You may have been confused by this question, (lots are). The key points are it is asking about a remotely operated winch. So it is not answer A, because on remote winches BOTH brakes must come on automatically. Other students don’t read the question properly and answer 8:1, which of course is the wire NOT the winch

52
Q

Which of the following 4 tables (A, B, C, or D) contains the correct parameters for diving quality air according to the air purity standard BSEN 12021?

a. Table A

Contaminate          Concentration
carbon Monoxide        5 ppm 
carbon Dioxide            500ppm 
Water                          25 mg/m3 
Oil                               0.5 mg/m3

b. Table B

Contaminate Concentration
carbon Monoxide 5 ppm
carbon Dioxide 500ppm
Water 500 mg/m3
Oil 0.5 mg/m3

c. Table c

Contaminate          Concentration
carbon Monoxide        5 ppm 
carbon Dioxide            5 ppm 
Water                          25 mg/m3 
Oil                               0.5 mg/m3

d. Table D

Contaminate          Concentration
carbon Monoxide        500 ppm 
carbon Dioxide            500ppm 
Water                          25 mg/m3 
Oil                               0.5 mg/m3
A

A

53
Q

Mobilise a job where the work is at two different depths, the following information must be used for these questions.

SYSTEM:-

1 SDC (Bell) : FV 5 m3 
2 DDC of equal FV which is unknown, but prior to sat it required 672 m3 of gas to blow down DDC's and EL's to 120msw.
2 Entry Locks (EL) : FV 1Om3 each 
3 teams of 2 divers

WORK SCHEDULE: Team 1 to carry out a total of 6 lockout hours per day at 35 msw, between 0001hrs and 0700hrs using DDC 1 and EL 1, storage is 30 msw.
Assume bell is deployed to work depth.
Team 2 and 3 are to carry out a total of 14 lockout hours at a depth of 160 msw between 0800hrs and 2359hrs using DDC 2 and EL 2, storage is 150 msw.
Assume the bell is deployed to working depth.

GAS
Mix 1 : 140 bar 90/10
Mix 2 : 165 bar 97/3
Mix 3 : 190 bar 98/2

DURATION:
Team 1: 7 days saturation with 3 days decompression
Team 2 and 3: 5 days saturation with 5 days decompression

  1. What is the F.V. of a single chamber without the EL?

a. 16.25 m3
b. 17 m3
c. 18 m3
d. 23 m3

  1. What is the total volume of gas required to pressurise DDC I and EL to 30 msw and DDC 2 and EL 2 to 150 msw?

a. 504 m3
b. 525 m3
c. 540 m3
d. 594 m3

  1. Which of the following is the total gas required for diver lockout per day for teams 2 and 3, assuming a consumption rate of 35 litres per minute?

a. 6720 litres
b. 7140 litres
c. 470400 litres
d. 499800 litres

  1. Ignoring diver lockout but including decompression, what is the total volume of metabolic oxygen consumed by the 6 divers during their saturation?

a. 1800 litres
b. 43200 litres
c. 86400 litres
d. 65000 litres

  1. To supply the correct ppO2 the company tables require a 4% oxygen mix on a dive to 160 msw, what oxygen % will be required at 35 msw?

a. 14.2%
b. 15.1%
c. 18.3%
d. 19.4%

  1. How much gas is used to pressurise the bell between the hours of 0001 hours and 2359 hours when all three teams are diving?

a. 60 m3
b. 65 ms
c. 72.5 m3
d. 87.5 m3

  1. If one of the EL’s is leaking 17 m3 of gas per day while isolated from the DDC due to leaks. How many metres / hour does this equate to?

a. 0.29 m3/hr
b. 0.71 m3/hr
c. 1.25 m3/hr
d. 1.7 m3/hr

  1. During decompression of teams 2 and 3 at what depth should the 12% BIBS mix be changed to prevent the pp02 from dropping below 1.5 bar?

a. 90 msw
b. 105 msw
c. 115 msw
d. 125 msw

A
  1. C
  2. A
  3. D
  4. B
  5. B
  6. C
  7. B
  8. C
54
Q

The maximum depth for a surface orientated standby diver in the UK is?

a. 30 msw
b. 50 msw
c. 75 msw
d. 80 msw

A

b

55
Q

The normal living parameters within the chamber during saturation would be?

a. Temp 25-40 oC, 
600 mb O2, 
CO2 200ppm, 
Nitrogen 10ppm, 
Humidity 50-70 
b. Temp 25-33 oC, 
400 mb O2, 
C02 5000ppm 
Nitrogen 1000ppm, 
Humidity 50-70 
c. Temp 25-30 oC, 
500 mb O2, 
CO2 200ppm, 
Nitrogen 10ppm, 
Humidity 20- 40 
d. Temp 30-40 oC, 
1000 mb O2, 
CO2 500ppm, 
Nitrogen 15ppm, 
Humidity 25-85
A

b

56
Q

What do the initials JIC mean?

a. Joint Internal Council
b. Joint International Corporation
c. Joint Industrial Coupling
d. Joint Industrial Council

A

d

57
Q

As the diving supervisor, if your bell was lost (main lift wire, guide wires and umbilical parted), what would you do first?

a. Mark the location with a buoy
b. Call the bellman on through water comms
c. Launch an R.O.V.
d. Call safety officer at diving contractor office

A

b

58
Q

Under IMCA guidance notes, the diving supervisor may pass over total communications responsibility to?

a. Another member of his diving team
b. His leading diver only
c. An appointed diving supervisor
d. Any competent person in an emergency

A

c

59
Q

All TUP bells must be fitted with a relocation transponder operating at?

a. 73.5 kHz
b. 53.7 kHz
c. 75.3 kHz
d. 37.5 kHz

A

d

60
Q

Your diver is suffering from oxygen toxicity (wrong gas was supplied via umbilical) and is about to go into convulsion in the bell. What would you advise the bellman to do?

a. Leave the divers hat on, but switch to onboard gas
b. Put the diver on B.I.B.S
c. Remove hat and protect the diver from injury
d. Put the diver on an emergency re-breather

A

c

61
Q

A chemical sampling tube reading taken by the bellman is showing 0.6%. Bell depth is 70 msw. How many ppm CO2 is that equivalent to? (As read on analyser in control room)

a. 750 ppm
b. 48000 ppm
c. 4.8 ppm
d. 857 ppm

A

a

62
Q
  1. A chamber is pressurised from the surface to 20 msw using 6% HeO2. What is the ppO2 in the chamber at 20 msw?

a. 0.21 bar
b. O.12 bar
c. 0.33 bar
d. 0.42 bar

  1. The same chamber is then pressurized from 20 msw to 57 msw using 4% HeO2. What will be the ppO2 at 57 msw?

a. 0.21 bar
b. O.12 bar
c. 0.478 bar
d. O.148 bar

  1. The same chamber is then pressurized from 57 msw to 92 msw using 2.5% HeO2. What will be the pp02 at 92 msw?

a. 0.087 bar
b. 0.565 bar
c. 0.297 bar
d. 0.478 bar

  1. What is the % O2 and ppO2 at 92 msw of this same chamber?

a. 0.565 bar / 5.5%
b. 0.565 bar / 3%
c. 0.210 bar / 21%
d. 0.565 bar / 2%

A
  1. C
  2. C
  3. B
  4. A
63
Q

A DDC is pressurized from the surface to 267 msw using 2% HeO2. What is the He% at 267 msw?

a. 94.5%
b. 98%
c. 92%
d. 97%

A

a

Exame Question

64
Q

When using a radiation source during a diving task, who is responsible for the use of the radiation source?

a. Diving Supervisor
b. Radiation Supervisor
c. Superintendent
d. Client

A

b

65
Q

Secondary bell communications must be by?

a. Emergency telephone
b. Through water comms
c. Flashing lights
d. Umbilical line pull signals

A

a

66
Q

Offshore diving communications between diver and surface should be recorded?

a. Until diver returns to surface
b. Until end of his decompression or therapeutic treatment
c. Until diver returns to place he started diving operations from
d. Until diver returns to chamber

A

c

67
Q

On a DP vessel hard-wire comms must be provided between?

a. Dive control and masters cabin
b. Dive control and engine room
c. Dive control and L.S.T. cabin
d. Dive control and ships crane

A

d

PS: Options differ in exams, but from the options given here, D is correct

68
Q

A D.P. operator should inform the diving supervisor of?

a. Ship and helicopter movements in the vicinity
b. Use or intention to use, water jetting equipment
c. Intention to dump mud, galley waste etc.
d. Possibility of divers blanking acoustic reference signals

A

a

69
Q

In conditions of reduced visibility, decisions about the suitability of conditions for diving from D.P. vessels rests with?

a. The Master
b. The Diving Superintendent
c. The Diving Supervisor
d. The Radio Operator

A

a

70
Q

Under the “International regulations for preventing collisions at sea”, vessels engaged in U/W operations must display?

a. 3 all round lights in a vertical line, the upper and the lower being white and the middle being red
b. 3 all round lights in a vertical line, all 3 being white and where they can best be seen
c. 3 all round lights in a vertical line, the upper and lower being red, the middle being white
d. 3 all round lights in a vertical line, all 3 being red where they can best be seen

A

c

71
Q

Diving vessels are required to exhibit the diving lights under the “collision regulations” when they are?

a. Less than 50 m in length
b. Less than 20 m in length
c. Applies to all vessels that are restricted in the ability to manoeuvre
d. Less than 7 m in length

A

c

72
Q

The recommended safe distance from a radiation source is?

a. 15m
b. 8 m
c. Does not matter as water is a barrier
d. 3m

A

b

73
Q

An oxygen analyzer with Hi / Lo visual and audible alarms is required?

a. To monitor the passageways to onboard gas storage rooms
b. Downstream of the divers supply gas in dive control
c. In the machinery container
d. On deck at the gas storage area

A

b

74
Q

On successful completion of a DCI treatment on the first recompression, as a minimum guide according to DMAC 07 Rev 2, a diver should not fly on commercial aircraft above 600 metres (2000 feet) for?

a. 24 hours
b. 72 hours
c. 48 hours
d. 6 hours

A

b

DMAC 07 rev 2

75
Q

Using the following mixes, and using Mix 2 as your base, how much 2% will be required to make 200 bar of 4%?

Mix 1 : 200 bar of 10%
Mix 2 : 125 bar of 3%
Mix 3 : 200 bar of 2%

a. 4 bar
b. 9 bar
c. 34 bar
d. 41 bar

A

d

76
Q

A chamber is brought to the surface from 120 msw where O2 was 4.4%. What is the 02 % and the partial pressure?

a. 4.4% & 0.044 ppO2 bar
b. 4.4% & 0.0044 ppO2 bar
c. 4.4% & 4.4 ppO2 bar
d. 4.4% & 44.4 ppO2 bar

A

a

77
Q

What is the minimum amount of gas to be kept as reserve for each diver on BIBS in a saturation DDC in case of a contaminated atmosphere?

a. 8 Hours per diver
b. 6 Hours per diver
c. 4 Hours per diver
d. 2 Hours per diver

A

c

78
Q

A 12 litres bailout is charged to 200 bar. A dive is planned to 100 msw. How much umbilical can be deployed from the bell?

a. 20 metres
b. 30 metres
c. 40 metres
d. 50 metres

A

c

79
Q

A 2% mix was inadvertently supplied to the diver at 55 msw. What would the diver be suffering from?

a. Hypoxia
b. Hypercapnia
c. Anoxia
d. Hypocapnia

A

a

80
Q

Helium conducts heat approximately how many times faster than air?

a. 2
b. 4
c. 6
d. 8

A

c

81
Q

What pressure should be set on the dive panel regulator to supply the diver when he is at 140 msw? it is a 3 man bell run.

a. 10 bar
b. 14 bar
c. 25 bar
d. 44 bar

A

c

82
Q

When calculating for bell buoyancy, what is the standard weight of a fully dressed diver which should be taken into account?

a. 100 kg
b. 125 kg
c. 150 kg
d. 200 kg

A

c

83
Q

If 200 psi of Oxygen is added to 1800 psi of 5% what will be the final percentage of the mix?

a. 20%
b. 29%
c. 14.5%
d. 15.4%

A

c

84
Q

Hyperbaric rescue systems should be marked with how many signs which should be visible when floating in the water?

a. 1
b. 2
c. 3
d. 4

A

c

85
Q

You have unlimited pure helium & oxygen onboard. You want to make 190 bar of 8%. How much O2 is required?

a. 152 bar
b. 15.2 bar
c. 1.52 bar
d. 4.2 bar

A

b

86
Q

The main gas umbilical supply on the bell must be fitted with?

a. Flow fuse
b. Quick connector
c. In-line filter
d. Non-return valve

A

d

87
Q

You have to treat a bend in a diver at 95 msw and will complete 4 cycles of 30 minutes duration, working on a consumption of 40 litres per minute measured at the surface, you will use:

a) 4.8 m3
b) 5.6 m3
c) 50.4 m3
d) 456.0 m3

A

C

10.5 x 4 x 30 x 40 = 50400 = 50.4m3

88
Q

To administer a treatment gas to a diver at 600 fsw with a 2.5 PPO2 requires:

a) 10%
b) 13%
c) 17%
d) 20%

A

600 = 19.18 ata

2.5/19.18 = 13%

89
Q

With which one of the following can vestibular decompression be associated?

a) Changing from breathing air to breathing mixed gas
b) Changing from breathing mixed gas to breathing air
c) Nitrox saturation
d) Prolonged exertion on low PPO2 mixes

A

b

90
Q

You have been asked by the LSS to connect a new gas supply to the chamber control panel. What is the most important precaution to take?

a) Open all valves slowly
b) Check that the gas has been analysed
c) Check pressure
d) Check analysers have been calibrated

A

b

91
Q

What is the recommended minimum breaking load of a bell winch wire?

a) 1.1 times the safe working load
b) 1.5 times the safe working load
c) 5 times the safe working load
d) 8 times the safe working load

A

d

92
Q

In accordance with IMCA guidelines, which one of the following is the Common Emergency Reply Frequency on which a bell emergency location transponder operates?

a) 33.5 kHz
b) 34.5 kHz
c) 37.5 kHz
d) 42.5 kHz

A

c

93
Q

When working in the vicinity of an impressed current anode system operating at 24 volts DC:

a) A line insulation monitor should be fitted
b) The diver may go as close as he likes to the system when the power is on
c) The diver should remain at a minimum distance of 10 feet from the system
d) The power should be off

A

B

PS: 1. If the operating voltage of the system is under the maximum safe voltage level of 30V dc.

94
Q

What are the main requirements for a digital gauge?

a) It must read in feet of seawater, it must display the reading to one decimal point, it must be 24v
b) It must read in metres of seawater, it must display the reading to one decimal point, it must be large and clear enough to be read easily and accurately
c) It must be large and clear enough to be read easily and accurately, it must display clearly on the unit whether it reads in feet or metres, it must be 24v
d) It must display clearly on the unit whether it reads in feet or metres, it must be large and clear enough to be read easily and accurately, it must display the reading to one decimal point

A

d

95
Q

In a remotely Operated winch system, is right to say that both brake systems must to come on automatically.

True or False

A

True

Bell Diving Supervisors QUESTIONS (15 decks)

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