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Air Diving Supervisors QUESTIONS > Supervisors Possible Questions > Flashcards

Supervisors Possible Questions Flashcards

1
Q
  1. The inverter line function is:

a. To hold the load back if the rigging fails
b. For the diver to vent air from the bag
c. To up end the bag and dump the gas from thebag if the rigging fails
d. To reduce the shock load on the rigging

A

B, C

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2
Q

2- If a manufactured at attachment point for an inverter line has not been fitted to a Lift bag:

a. An attachment point / strap can be hated on site
b. A risk assessment should be done to ensure the activity is safe
c. The master link / webbing strap can be used
d. Then it should not be used

A

d

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3
Q

3- Where do we attach an inverter line?

a. From the load to the manufactured attachment point on top of the lift bag
b. From the load onto the handling point of the bags
c. From the load to the master link
d. To the Dump Valve lanyard

A

a

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4
Q

4- What is a DMA?

a. Dead Man Anchor
b. Dead Metal Anchor
c. Dead Man Attachment
d. Diver Made Anchor

A

a

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5
Q
  1. As a minimum a lifting bag should have which of the following?

a. Manufacturers information sheet detailing SWL testing maintenance and the uses to it has been design
b. Dump valve and dump line
c. Inverter line
d. All of the above

A

d

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6
Q
  1. The dump valve in a lifting bag is a manual valve……

a. Where the inverter line is secured to
b. Used for the diver for fine control and adjustment of the bag buoyancy
c. Used by the diver to inflate the lift bag
d. Used by the topside tenders to deflate the lift bag

A

b

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7
Q
  1. SWL (Safe Working Load) can be equal or less than WLL Working Load Limit

True
False

A

True

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8
Q
  1. A suitable fix point is a point

a. To which a hold-back line can be attached with confidence
b. That have been subject to an engineering assessment to ensure that it is capable of resisting a snatch load
c. Capable of arresting any uncontrolled ascent without been damage deformed or breaking
d. Alt of the above

A

d

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9
Q
  1. Hold-back line / rigging is:

a. Is attached to strong point at or near the crown of the lift bag
b. Provided to restrain or hold-back the positive buoyancy of the lift bag
c. Is attached to the dump valve on the lift bag
d. Is Compulsory when using lifting bags

A

b

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10
Q
  1. Before lift bags are used in underwater engineering tasks and proper assessment ofthe task to be performed should be made, which should include the following:

a. Calculations of the weight to be lifted or moved
b. Calculations of the size of the lift bag(s) required
c. The number and sizes of lift bags required
d. All of the above

A

d

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11
Q
  1. In the event of the over inflation of the lift bag, which of the following prevents an
    uncontrolled ascent of the load.

a. Inverter Line
b. Weighted Dump Line
c. Hold-back line
d. The weight of the load and the DMA

A

c

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12
Q
  1. Which of the following can cause the overstressing of an open bottom lift bag and rigging in use?

a. A vessel movement with crane attached to the load
b. use a nylon strap
c. mud suction/seabed suction
d. overfilling lift bag

A

c

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13
Q
  1. When using lift bags on an object underwater it is required to have a hold-back
    line secured from the object to a DMA or a secure fixed point?

a. No. it’s not required
b. Hold-back line can be secured to the diver
c. An inverter line serves the same purpose
d. Yes, a hold-back line is essential

A

d

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14
Q
  1. Restraining or hold back rigging is provided to restrain or hold back the….

a.Diver
b.Positive buoyancy of the lift bag and load
c. Drift of the DMA
d. Positive buoyancy of DMA

A

b

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15
Q
  1. Hold back rigging may be omitted when……

a. When the diver decides so

b. When moving loads for not more than 3m

c. The upthrust of the lift bag is known to be considerably less than the weight of the load

d. when a task specific risk assessment demonstrates that an uncontrolled ascent of the load cannot occur

A

d

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16
Q

1.A diver complains of a dull pain in his right knee after completing a no-stop air dive. He was recompressed in a deck chamber where he reported immediate relief. How long should he wait before being allowed to fly
home.

a. 8 hours
b. 12 hours
c. 72 hours
d. Able to fly immediately

A

C

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17
Q
  1. An asymptomatic diver, after just completing an air dive to 63fsw, with
    bottom time of 73mins should wait for before flying ashore in a helicopter.

a. 12 hours
b. 6 hours
c. 24 hours
d. 48 hours

A

A

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18
Q
  1. Your air diver’s schedule is USN Rev 7 120/35 (N). He should not fly on an intercontinental flight until __ ?

a. 6 hours
b. 12 hours
c. 24 hours
d. 48 hours

A

C

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19
Q
  1. What is the time required before flying after diving in a cabin pressure of 8,000ft if the diver has Just completed a surface decompression dive of less than 4 hours under pressure?

a. 12 hours
b. 24 hours
c. 48 hours
d. 72 hours

A

B

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20
Q
  1. Your diver has just reach surface following a Tablet 6 treatment for suspected bends. He reports to be well with complete resolution
    upon recompression. How long should he wait before being allowed to fly home?

a. 12 hours
b. 72 hours
c. 6 hours
d. 24 hours

A

B

No 48h, so answer as long as possible.

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21
Q
  1. Your diver has just reached surface following a decompression dive at 2200hr on Monday 21st. He has to travel to the airport and the road route includes an ascent and decent of over 950m. The journey is 4 hours
    to the lairport, and his flight departs at 2230hr Tuesday 22nd. How long should he wait before being allowed to travel to the airport?

a. Able to travel immediately
b. 48 hours
c. 12 hours
d. 24 hours

A

D

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22
Q
  1. To whom MUST serious incidents be reported?

a. O.I.M. or the vessel master
b. Chief steward
c. Radio operator
d. All of the above

A

A

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23
Q
  1. Who in a diving project is responsible for ensuring suitable plant and equipment is available and correctly maintained?

a. Client
b. Diving Contractor
c. Diving Supervisor
d. Life Support Supervisor

A

B

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24
Q
  1. Management of change should take place when there are changes to which of the following?

a. Personnel, Processes and Procedures
b. Systems. Ordering of stock or spares
c. Laws or Equipment
d. All of the above

A

D

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25
Q
  1. The diving supervisor is responsible for maintaining a …..? (Check all applicable answers)

a. A detailed diving operation logbook
b. Record of every dive in a diving operation
c. Risk Assessment Register
d. Planned Maintenance Schedule

A

AB

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26
Q
  1. The diving contractor must Issue the diving supervisor with?

a. Letter of Appointment
b. Log Book
c. VHF radio
d. Safety boots

A

a

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27
Q
  1. The Client has the responsibility of informing the diving contractor of…

a. Inherent risks
b. Any substance likely to come into contact by the diver
c. Permit to Work systems
d. All of the above

A

D

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28
Q
  1. What is the minimum team size for surface supplied mix gas diving?

a.6
b.3
c.4
d.5

A

A

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29
Q
  1. An ROV should only be deployed or recovered during diving operations on whose authority?

a. The on-shift diving supervisor
b. The OIM or master
c. The ROV senior operator
d. The Client Rep

A

A

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30
Q
  1. An underwater lift plan it involving the use of air lift bags should include.- (Check all applicable answers)

a. Calculations, where possible to determine the centre of buoyancy and centre of gravity so that steps can be taken to prevent the object being
lifted from spinning or turning over
b. Calculations of the size of the lift bag required
c. Calculations of the weight to be lifted or moved
d. Calculations of water temperature and wind sheer

A

ABC

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31
Q
  1. The dump valve should be fitted with a weighted dump line to enable. (Check all applicable answers)

a. The diver to operate the valve from a safe location or distance
b. Quick venting of the lift bag should the load rigging fail
c. The diver to make fine control and adjustments the lift bag buoyancy
d The diver to move and relocate the lift bag and load

A

AC

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32
Q
  1. The preferable method of filling underwater air lift bags is

a. A dedicated air line
b. Diver’s pneumo
c. Diver’s breathing exhaust
d. A fit-for-purpose air Line that is restrained at the bottom allowing for a working tail

A

D

33
Q
  1. When performing an underwater lift operation utilizing parachute type air lift bags, the diving supervisor has to ensure…

a.That an appropriate risk assessment and lift plan must be made prior to commencement
b. That the in-water weight of the DMA and the lift toad exceeds the total lift force applied by the lift bag(s)
c.Divers should always position themselves whilst working so that their umbilicals are never routed over or directly under lift bags and toads
d. All of the above

A

D

34
Q
  1. Which of these steps of the rigging and inflation sequence for dynamic lifts holds true. (Check alt applicable answers)

a. Connect the flooded bag securely to the load. The rigging between the bag and the load should be kept as short as practicable
b. Once the rigging between the lift bag and the load is secure the diver may inflate the lift bag to allow it to ‘stand ‘ upright
c Adjust and ‘snug-up’ the inverter line so as to minimise slack in the line without distorting the bag or cutting into the canopy
d. During inflation confirm that the air lift bag slings are free of twists and evenly loaded. Stop inflation and reset if twists are found.

A

ABCD

35
Q
  1. Archimedes Principle states that-

a. The pressure of a given mass of gas is inversely proportional to it’s volume at a constant temperature.
b The buoyant force on an object is equal to the weight of the fluid displaced by the object
c. The amount of dissolved gas in liquid is proportional to it’s partial pressure above the liquid
d. That the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature

A

B

36
Q
  1. Which of these is attached to the manufactured attachment point at the crown of the parachute bag so that the bag will invert should there be a failure of any part of the attached rigging?

a. Hold-back line
b. Dump valve bne
c. Inverter Line
d. Alignment line

A

C

37
Q
  1. All lift bags need to be inspected before use for the following;

a.A check of the serial numbers on all the components numbers on all of the components with number on the certificate
b. Visual inspection of the webbing strops and the stitching on the bags
c. The ‘dump valve ‘ at the top of parachute bags to ensure that it is clean and should be checked and can operate freely. The line attached to the
‘dump valve ‘ should be checked to ensure that it is attached correctly and wilt operate the valve when pulled
d. all of the above

A

D

38
Q
  1. The safety factor for the minimum burst pressure of high pressure hose assemblies is normally:

a. 1 to 1
b. 2 to 1
c. 2.5 to 1
d. 5 to 1

A

C

39
Q
  1. All HP waterjet units should be provided with:

a. Operations and Maintenance manuals and maintenance records
b. Pre-use / daily checklists and test/rigging/ calibration certificates
c. Adequate spares package
d. All of the above

A

D

40
Q
  1. The practice of Locking of the trigger in the ‘open ‘ position:

a. Can be done using wire, wood / wedge etc
b. Should never be employed by divers or surface operators.
c. Is suitable when the diver is working at one stable location. that doesn’t require repositioning
d. Is subject to the controls and mitigations identified the risk assessment
hose required

A

B

41
Q
  1. The minimum length of HP hose is required normally:

a. 1.5 times the maximum working depth.
b Subject to the vessel design e.g. DP or anchored.
c. Similar to the maximum water depth.
d. Subject to the current and weather

A

A

42
Q
  1. Who is responsible to ensure that personnel are adequately trained and
    familiar with equipment:

a. The diver
b. The diving supervisor
c. The diving contractor
d. The client as he approved the personnel

A

C

43
Q
  1. During deployment and recovery of the water jet gun, the machinery should be

a. Switched on but no pressure loaded in the system
b. Shut off with pressure released from the system
c. Switched on with pressure loaded in the system
d. Shutoff without releasing pressure in the system

A

B

44
Q
  1. What are most common causes of serious injury to divers engaged in high pressure water jetting operations? (Check all applicable answers)

a. Unauthorised modification of equipment
b. Complacency or inadequately trained divers
c: Loss of control of the trajectory of the jetstream e.g. loss of position, mid-wate unbalanced gun etc.
d. Incorrect use of equipment causing component / weld failure e.g. using lance as a pry bar or hammer etc.

A

ABCD

45
Q
  1. Your diver reported having ‘shot’ himself in his right foot whilst operating a HP waterjet cleaning a boat-landing clamp and is experiencing pain. What is your course of action?

a. ‘Tell him to don’t worry about and that he should finish the task at hand first
b. Abort the dive recover the diver, threat his wound immediately and seek specialist medical advice
c. Jump the Stand-by Diver to assess the seriousness of the injury
d. Abort the dive recover the diver, threat his wound immediately and seek specialist medical advice and make a report

A

D

46
Q
  1. When using a crane hook to lower an object into the sea, you should ensure?

a. Tie the hook closed
b. Duct Tape the hook closed
c. Weld the hook closed
d. Use safety hook or replace hook with a shackle

A

D

47
Q
  1. Shock loading may occur when.-

a. An object is lowered into the water too quickly causing a sudden slack and snatch of the rigging that is attached to the object
b. Large swells would cause the vessel to heaved whilst overboarding the lifted object
c. The lifted object is transitioning through the splash zone whilst being lowered into the water column
d. All of the above

A

D

48
Q
  1. At the selected overboarding position, the lifted object should normally be lowered to a depth some ……… meters above and offset from any subsea facilities.

a. 1 to 2
b. 4 to 6
c. 10 to 15
d. 7 to 10

A

C

49
Q
  1. In Question 3 this position is known as ‘ ‘ __ (Check the applicable answers)

a. Wet store
b. Second stop point
c. Short mark
d. Final position

A

C

50
Q
  1. In subsea lift operation involving diver intervention consideration should be given to…

a. Lack of subsea visibility, use of subsea lighting
b. Load positional beacons, safe area for deployment/recovery
c. Diver umbilical snagging points/sharp edges/ use of diver tag lines
d. All of the above

A

D

51
Q
  1. When an object lifted off deck starts to swing or move in an uncontrolled way it

a. Set the load back down on deck immediately and abort the lift
b. Swung overboard and immersed in the water as soon as possible
c. Attempt to stop the swinging tired object manually
d. Have the crane slew left or right to counteract the swing or movement of the load.

A

B

52
Q
  1. Who has control of the overboard lift of the object from lift off deck until the first stop point in-water?

a. Diver
b. Deck lifting supervisor
c. Crane operator
d. Dive supervisor

A

B

53
Q
  1. If load is to be lifted from air to subsea or vice versa, consider shock loads and changes to weight in air due to.”

a. The effects of flooding or draining
b. Seabed suction. plus marine growth or debris/grout
c Buoyancy, air entrapment
d. All of the above

A

D

54
Q
  1. When using a crane in support of diving operations, there should always be a dedicated line of communications channel (where possible hard wired) between the

a. Diver and Crane Operator
b. Diving Supervisor and Deck Foreman
c. Diving Supervisor and Diver
d. Diving Supervisor and Crane Operator

A

D

55
Q
  1. When conducting subsea lifting operations the Diving Supervisor has to ensure that…

a. He/she and atl personnel involved are cognizant with the lift-plan as well as the risk assessment
b. He/she has several means of evaluating the position of the Lifted object. e.g. by use of ROV feeds. diver hat cameras. survey beacons etc.
c. Considerations have been given to a place of
safety for the diver(s)
d. All of the above

A

D

56
Q
  1. Before commencing any subsea lifts what action/s can you, as the diving supervisor, take to ensure the safety of your diver(s)?
    (Check the applicable answers)

a. Recover your diver(s) to surface
b. Station your diver(s) at a suitable safe refuge, e.g. inside the dive basket/wet bell
c. Ask your divers to maintain visual contact of the load and give information for manoeuvring the lifted object safely
d. Tell the crane operator to be careful as you have diver(s) in the water

A

BCD

57
Q
  1. Depending on the depth of water, and environmental conditions (including underwater visibility) the second stop point depth is generally around .____- above the seabed/subsea asset.

a. 2 msw
b. 10 fsw
c. 5 msw
d. 10 msw

A

D

58
Q
  1. Once the lifted object has reached its designated final holding position, if the diver(s) cannot see the object, you should.-

a. Lower the suspended object slowly at 1 metre increments until the diver makes visual contact
b. Deploy the stand-by diver to assist in searching for the suspended object
c. Lower the suspended object onto the seabed
d. Recover and replace the diver

A

A

59
Q
  1. The landing of a lifted object at its intended resting place can proceed only after the diving supervisor…

a. And the diver concur that it is safe to do so
b. Ensures that the diver(s) have not position himself underneath the lifted object or between the object and any underwater obstructions
c. Ensures that there is no unnecessary slack in the diver’s umbilical and is clear from underneath the Lifted object
d. All of the above

A

D

60
Q
  1. Your diver tells you he has disconnected the rigging and that the crane hook is free of the lifted object. Your next course of action will be…

a. The disconnected rigging should then be raised very slowly and in small increments
b. Ask the diver to demonstrate that every rigging connection has been released and to count the number released. and ensure his umbilical is
clear of the rigging and load.
c. Raise the disconnected rigging, ask the crane operator to keep a continuous check of his hook load to ensure there is no lifted object weight on the crane
d. Instruct the diver to proceed to in-water refuge or to the surface before the hook and rigging can be brought back to surface.

A

B

61
Q
  1. Subsea lifts using surface-based lifting equipment are ‘blind lifts’. It is therefore essential that communication between the crane operator and the dive supervisor in dive control..(Check the applicable answers)

a. Is clear and reliable with directions or commands that include approximate distances and direction of travel
b. Is dedicated and preferably hard-wired
c. Is a hand-held radio on a shared channel
d. All of the above

A

ab

62
Q

1 A diver working in a wetsuit complains of cold. Which method of heat transfer contributes most to heat loss?

a. Radiation
b. Thermal Balancing
c. Convection
d. Conduction

A

D

63
Q
  1. What is the absolute pressure for a diver working at depth of 132 fsw?

a. 13.2 ATA
b. 5 ATA
c. 4.4 ATA
d. 10.4 ATA

A

B

64
Q
  1. A spool piece attached with parachute lift bag becomes positively buoyant. Which of these statements describes its state of buoyancy directly. (Check applicable answers)

a. The weight of water it displaces is more than its weight
b. The weight of water it displaces is less than its weight
c. The weight of water it displaces is the same as its weight
d. The buoyant force is greater than its weight

A

AD

65
Q
  1. A diver will find it difficult to determine the direction of sound underwater because sound travels approximately how many times
    faster in water than in air?

a.7
b.6
c.4
d.8

A

C

66
Q
  1. A spool piece weighing 7.8 tonnes displaces 3 cubic metres of seawater. What is its apparent weight underwater? (density of seawater is 1030kg per cubic metre)

a. 2.60 tonnes
b. 7.80 tonnes
c. 4.71 tonnes
d. 8.03 tonnes

A

C

67
Q
  1. What does the Archimedes Principle have to do with commercial diving? (Check applicable answers)

a. No practical relevance. only theoretical interest
b. It explains what affects a diver’s buoyancy
c. Fundamental when calculating subsea lift requirements
d. It explains the principle of water surface tension

A

BC

68
Q
  1. What is the gauge pressure when absolute pressure is 246 psi ?

a. 245 psi
b. 157.5 psi
c. 231.3 psi
d. 247 psi

A

C

246 - 14.7 = 231.3 PSI

69
Q
  1. Which of these statements on the subject of Light dynamics underwater hold true? (Check applicable answers)

a. Refraction causes objects underwater to appear larger and closer

b. in clear water the object will appear to be larger and closer, but in turbid water, it will appear smaller and further away

c. Light scattering is intensified underwater, resulting in diffusion which
interferes with vision by reducing contrast significantly.

d. Water absorbs colours of the light. Red is the first colour absorbed. followed by orange, yellow. green, blue, indigo, and violet.

A

ABCD

70
Q
  1. What is a Tension Pneumothorax?

a. Gas bubbles have entered the bloodstream
b. Collapsed lung with organ shift
c. Gas escaping from lungs into the pleural space
d. Bubbles visible under the skin

A

B

71
Q
  1. Recompression is used in the treatment of gas embolism to?

a. Help improve the circulation of blood to the brain
b. Reduce the size of gas bubbles causing the embolism
c. To increase blood pressure to dislodge the gas bubbles
d. To Increase partial pressure of oxygen

A

B

72
Q
  1. During a surface decompression your diver complains of chest pains and breathing difficulties. You immediately stop decompressing and the symptoms stabilize. recompress and they are relieved. However the symptoms return when decompression starts again. What would you suspect he is suffering from?

a. Pneumothorax
b. Acute Neurologic Decompression Sickness
c. Muscle fatigue from overexertion
d. Hypercapnia

A

A

73
Q
  1. Vestibular DCS in mix gas diving can be caused by?

a. Over exertion
b. Switching air to gas
c. Nitrox saturation
d. Switching from mixed gas to air

A

D

74
Q
  1. An experienced diver arrives on surface after a free time dive and after 5 minutes you noticed that he is having difficulties standing and appears confused. What would you suspect and what would you do?

a. Lethargy. Tell,the diver to take a 30 minutes break from work
b. Call company hyperbaric doctor for advice
c. Pneumothorax. decompress to 165 fsw on oxygen
d. AGE. decompress Immediately and follow company procedures

A

D

75
Q
  1. After an hour upon completing a dive your diver collapsed whilst tendering the messenger line on the LARS. He complains of weakness and numbness in his legs and pins and needles on the soles of his feet.
    What would you suspect he is suffering from?

a. Spinal DCI
b. AGE
c. Interstitial Emphysema
d. Vestibular barotrauma

A

A

76
Q
  1. The risk of Decompression Illness in diving can be mitigated by? (Check applicable answers)

a. Strict and correct use of company approved decompression tables
b. Following company dive procedures
c. Selecting a table schedule that is deeper and longer than the actual dive to provide a margin of error
d. Adhering to the company’s exposure limit policy

A

ABCD

77
Q
  1. Your diver is coughing incessantly and complains of burning sensation in the chest and shortness of breath. What is he likely suffering from?

a. The Chokes
b. The Bends
c. AGE
d. Burst eardrum

A

A

78
Q
  1. The decision to return to diving after DCI should be made only by?

a.The company appointed diving medicine specialist
b. The company appointed dive supervisor
c. The occupational health doctor
d. ‘He family doctor

A

A

79
Q
  1. After decompression a diver should never be asked to perform hard physical work because..? (Check applicable answers)

a. He needs rest after his dive
b. There is a higher risk of DCI
c. It may cause air sacs in his lungs to rupture
d. His bloodstream is still full of ‘silent ‘ bubbles

A

BD

Air Diving Supervisors QUESTIONS (12 decks)

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