Diver 3*** Examination 2002.
Notes:
1.
Do not mark these papers.
2.
All papers to be returned to the exam supervisor at the end of the exam.
3.
Write your CFT number ONLY on the answer sheet supplied.
4.
Attempt all questions
5.
All questions carry equal marks.
6.
Show all workings on a separate sheet (s).
7.
Time allowed is 1.5 hours.
8.
General Knowledge pass mark
=
60%
Physics pass mark
=
60%
Physiology pass mark
=
60%
Dive Tables pass mark
=
70%
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Created by Brian O'Brien 4/5/02
General Knowledge.
1.
The effects of Nitrogen Narcosis are influenced by;
(a)
(b)
(c)
(d)
2.
The distress and calling channel for VHF telephony is?
(a)
(b)
(c)
(d)
3.
Sheet bend
Bowline
Reef knot
Fisherman’s bend.
Hydrostatic testing of a diving cylinder must be carried out;
(a)
(b)
(c)
(d)
6.
Chemocline
Thermocline
Incline
Halocline
The recommended knot to join two ropes of different sizes is:
(a)
(b)
(c)
(d)
5.
06
73
16
12
The zone where water of two different salinities meet is generally called a:
(a)
(b)
(c)
(d)
4.
Ambient pressure
Water temperature
Physical effort
All the above
Every 2 years
Every 4 years
With the VIP
As advised by the diveshop
Which condition occurs at spring tide?
(a)
(b)
(c)
(d)
High Water is at its lowest
Low Water is at its highest
Tidal Range is at a minimum
Tidal range and high water are at maximum
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7.
Vinegar is a useful liquid for the following purpose?
(a)
(b)
(c)
(d)
8.
If you are travelling north what is the Reciprocal Bearing ?
(a)
(b)
(c)
(d)
9
Lateral marks
Day marks
Cardinal marks
Special marks
The correct compression to breath ratio for CPR is:
(a)
(b)
(c)
(d)
13.
1 Year
2 Years
5 Years
10 Years
Which Sea Marks are used to indicate the safe side to pass a wreck?
(a)
(b)
(c)
(d)
12.
Measuring the internal capacity of the cylinder with water
The water displacement when filled to working pressure
The water displacement when filled to test pressure
Measuring the expansion when test pressure is applied and the permanent set
when back at atmospheric pressure
A 25 year old diver with no medical problems will require a medical every how many
years?
(a)
(b)
(c)
(d)
11.
90º
180º
270º
360º
Hydrostatic testing of a dive cylinder involves…
(a)
(b)
(c)
(d)
10.
Freeing salt seized zips on dive equipment
Easing Jellyfish stings
Putting on fish and chips
All of the above
15 : 2
5:1
10 : 2
10 : 1
Where would you find information on the direction of a current?
(a)
(b)
(c)
(d)
Talk to a local resident of the area
On an admiralty chart of the area
Observe how the boat rides at anchor
Observe a buoy floating in the water
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14.
To what point are all lines of longitude drawn on Admiralty charts?
(a)
(b)
(c)
(d)
15.
When should a dive computer battery be changed?
(a)
(b)
(c)
(d)
16.
When divers have left the surface to start their dive
When anchored
When you have divers in the water
While you are at the dive site.
Which seabed type is generally considered best for anchoring boats;
(a)
(b)
(c)
(d)
20.
Hurricane
Anti-cyclone
Depression
Occlusion
When would you fly a “divers down” flag?
(a)
(b)
(c)
(d)
19.
Keeping the eyes at low pressure
Placing a layer of glass between eyes and the water
Placing a layer of air between eyes and water
Reducing the magnification caused by seawater
The most common weather system experienced by the landmass of Ireland is a;
(a)
(b)
(c)
(d)
18.
When it out of charge
At the end of each season
After 100 dives
As specified by maker
Diving masks work by;
(a)
(b)
(c)
(d)
17.
True North
Grenwich
Magnetic North
Chart Datum
Sand
Mud
Rock
Weed
A dive cylinder should be stored…
(a)
(b)
(c)
(d)
Upright, fully charged
Upright and empty
Upright with 10 – 20 bar within
On its side with 10 – 20 bar within.
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Physics.
21.
Your Dive computer is calibrated to seawater. When you are at 10m in freshwater
what will it read?
(a)
(b)
(c)
(d)
22.
Divers will lose body heat before, during and after a dive by which of the following
mechanisms?
(a)
(b)
(c)
(d)
23.
700 metres
1500 metres
2400 metres
3100 metres
What causes objects underwater to appear neared and larger?
(a)
(b)
(c)
(d)
26.
14.7 metres
10 metres
10.2 metres
40 metres
Diving is considered to be at Altitude when above;
(a)
(b)
(c)
(d)
25.
Radiation
Convection
Conduction
All of the above
What depth of fresh water is equal to atmospheric pressure?
(a)
(b)
(c)
(d)
24.
9.4m
9.7m
10m
10.3m
Deflection
Reflection
Refraction
Reaction
What phrase completes the following law?
"In a mixture of gases, each constituent gas exerts a ‘partial pressure’ in proportion
to it’s ......................”
(a)
(b)
(c)
(d)
27.
Absolute pressure
Absolute Temperature
Percentage of the mixture
Density
What volume of air in a lifting bag will hold a mooring with a volume of 20 litres and
a mass of 100kg neutrally buoyant in freshwater?
(a)
(b)
(c)
(d)
77 litres
80 litres
83 litres
100 litres
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28.
In an EANx 36 mix, what is the partial pressure of Oxygen at a depth of 35 metres?
(a)
(b)
(c)
(d)
29.
A diver using a 12 litre bottle at 25 metres notices his air pressure drops from 200
bar to 150 bar after 10 minutes. What is his equivalent surface air consumption?
(a)
(b)
(c)
(d)
30.
1.56 litres
15.6 litres
16 litres
15.6 m3
At what partial pressure does oxygen become toxic?
(a)
(b)
(c)
(d)
34.
Fahrenheit
Kelvin
Rankine
Centigrade.
What volume must a BC have to provide a lift of 16kg in seawater?
(a)
(b)
(c)
(d)
33.
330 metres / second
660 metres / second
1345 metres / second
1675 metres / second
When temperature scale do we use when working with the gas laws?
(a)
(b)
(c)
(d)
32.
14 litres/minute
17 litres/minute
24 litres/minute
60 litres/minute
What is the approximate speed of sound in water?
(a)
(b)
(c)
(d)
31.
1.0 bar
1.12 bar
1.4 bar
1.6 bar
1.2 bar
1.4 bar
1.6 bar
1.8 bar
What law defines the amount of gas that will dissolve in a liquid?
(a)
(b)
(c)
(d)
Boyle’s Law
Charle’s Law
Dalton’s Law
Henry’s Law
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35.
Your club RIB has a design burst pressure of 2 Bar. You pump it to the
recommended 1.75 Bar pressure on a cool morning with a temperature of 70C. The
day turns out to be hot and sunny. How hot must the boat get to be at risk of
bursting should the relief valves fail?
(a)
(b)
(c)
(d)
36.
How long can a diver breathe from a 12-litre cylinder, filled to 232 bar, at 40 metres,
if the surface-breathing rate is 20 litres per minute?
(a)
(b)
(c)
(d)
37.
The fresh water is on top
The salt water is on top
The colder water is on top
The warmer water is on top
The colours absorbed at depth in water include the following: Green, Orange, Grey,
Red, Yellow, and Violet. Which other colour should be included with this list?
(a)
(b)
(c)
(d)
40.
Float with its top surface out of the water
Float with its top surface level with the water surface
Float below the surface
Sink to the bottom
In a halocline, which of the following statements is true?
(a)
(b)
(c)
(d)
39.
15 minutes
20 minutes
27 minutes
30 minutes
If a cube shaped object with a Relative Density of 1.1 is placed in deep calm
seawater, will it?
(a)
(b)
(c)
(d)
38.
87 0C
67 0C
47 0C
27 0C
Brown
Burgundy
Beige
Blue
What type of tide is experienced when the moon and sun are in line on the same
side of the earth?
(a)
(b)
(c)
(d)
Low Neaps
High Springs
Springs
Neaps
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Physiology.
41.
Expired air contains what approximate percentage of Carbon Dioxide?
(a)
(b)
(c)
(d)
42.
Carboxyhaemoglobin is commonly associated with which condition?
(a)
(b)
(c)
(d)
43.
35%
50%
70%
90%.
The treatment for decompression sickness is;
(a)
(b)
(c)
(d)
46.
Haemoglobin
White blood cells
Platelets
Red blood cells
What % of decompression sickness symptoms occurs within 1 hour after
surfacing?
(a)
(b)
(c)
(d)
45.
Oxygen Toxicity
Hypercapnia
Carbonmonoxide poisoning
Hyperventilation
Which of the following elements of blood fights infection?
(a)
(b)
(c)
(d)
44.
16
8
4
2
100% Oxygen
Recompression
EAR & ECM as required
First Aid
The transfer of oxygen from air to blood occurs in:
(a)
(b)
(c)
(d)
The Trachea
The Bronchi
The Alveoli
The Aorta
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47.
The section of the heart that pumps blood around the body is
(a)
(b)
(c)
(d)
48.
The Semi-circular canals control?
(a)
(b)
(c)
(d)
49.
Air
Mucous
Water
Blood
The treatment for severe Carbon Monoxide poisoning is
(a)
(b)
(c)
(d)
53.
Water
Blood
Air
Nitrogen
During a normal dive, the sinuses are mainly filled with…
(a)
(b)
(c)
(d)
52.
He feels alright
He becomes thirsty/hungry
He Stops shivering
He starts to sweat
During a normal dive, the middle ear is filled with…
(a)
(b)
(c)
(d)
51.
The Sound of ones voice
Pressure Equalisation
Balance
Hearing
A casualty has completely recovered from Hypothermia when
(a)
(b)
(c)
(d)
50.
The right ventricle
The right atrium
The left ventricle
The left atrium
100% Oxygen by demand mask
Hospitalisation for observation
Keep casualty calm and let nature take its course
Hyperbaric Oxygen Therapy
Which ailment may cause symptoms similar to a stroke or brain damage?
(a)
(b)
(c)
(d)
Pneumothorax
Air embolism
Subcutaneous emphysema
Mediastinal emphysema
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54.
A diver saturated with nitrogen will;
(a)
(b)
(c)
(d)
55.
The Tidal Volume for a person at rest is approximately
(a)
(b)
(c)
(d)
56.
Ambient Pressure in the lungs
Blood Pressure
Low Oxygen levels in the blood
High Carbon Dioxide levels in the blood
Symptoms associated with ‘Type 1’ decompression will include;
(a)
(b)
(c)
(d)
60.
It controls heartbeat
It controls bloodflow
It controls body temperature
It controls breathing rate of a snorkel diver
The stimulus to breathe is caused initially by;
(a)
(b)
(c)
(d)
59.
Muscle
Ligament
Bone
Soft Tissue
What does the hypothalamus do?
(a)
(b)
(c)
(d)
58.
0.5 litres
1.5 litres
4.5 litres
6.0 litres
What is the sternum composed of?
(a)
(b)
(c)
(d)
57.
Suffer irreversible injury
Require extended decompression
Never dive again
Be enjoying a pleasure dive
Pain in a joint
Loss of co-ordination
Vision problems
All of the above
Shallow water blackout might occur
(a)
(b)
(c)
(d)
On a long duration breath-hold dive
While ascending from a shallow dive
On ascent from a ‘deep’ snorkel dive
by hyperventilating after a snorkel dive
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Dive Tables.
61.
Dive computers allow us to stay underwater longer because;
(a)
(b)
(c)
(d)
62.
The recommended time to ascend from 40 metres depth to 20 metres depth is:
(a)
(b)
(c)
(d)
63.
16 minutes
17 minutes
18 minutes
20 minutes
What is the recommended maximum depth for extended range sports diving?
(a)
(b)
(c)
(d)
66.
Exercise gently
Calculate his remaining ascent time
Keep his chest at 3 metres
Breathe rapidly to outgas excess nitrogen
What is the NDL for 29 meter dive off Cork in January?
(a)
(b)
(c)
(d)
65.
1 minute
2 minutes
4 minutes
depends on the dive
When doing the 3-metre safety stop the diver should?
(a)
(b)
(c)
(d)
64.
They are less conservative
They are programmed with longer NDLs
They take account of the actual dive profile
They are simply more modern than the tables
35 metres
40 metres
45 metres
50 metres
When using Buehlmann dive tables, if you do an repetitive dive to an intermediate
depth, you must;
(a)
(b)
(c)
(d)
Use shallower depth for RNT and deeper depth for NDL
Use deeper depth for RNT and shallower depth for NDL
Use shallower depth for RNT and NDL
Use deeper depth for RNT and NDL
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67.
Which of the following tissues is a ‘fast’ tissue?
(a)
(b)
(c)
(d)
68.
What action do you take following a dive with a 3 minute stop completed after 19
minutes at 32 metre?
(a)
(b)
(c)
(d)
69.
29 minutes
25 minutes
20 minutes
17 minutes
After a short dive trip with two deep ‘no-mandatory stop’ dives per day what are the
rules you apply before flying home?
(a)
(b)
(c)
(d)
72.
20 minutes - C
20 minutes - E
25 minutes - E
25 minutes - F
Your RG is E, 16 minutes later you want to dive to 16 metres. What is the RNT for
this dive?
(a)
(b)
(c)
(d)
71.
Continue as normal
Give 100% oxygen, observe, and alert chamber
Give 100% oxygen, and stop diving for a minimum period of 24 hours.
Remove to chamber immediately.
What are the NDL and RG for a cold dive to 24 metres?
(a)
(b)
(c)
(d)
70.
Blood
Cartilage
Fat
Bone marrow
Do not fly on the same day as the last dive
Wait 12 hours minimum
Wait 24 hours minimum
Follow your Buddy
What is the maximum NDL for a cold working dive on a mooring at 23 metres?
(a)
(b)
(c)
(d)
13 minutes
20 minutes
25 minutes
35 minutes
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73.
Dive 1 is to 33 metres for 12 minutes. Surface interval is 2 hours. What is the
maximum NDL for a second dive to 20 metres?
(a)
(b)
(c)
(d)
74.
What is the purpose of a 2-hour surface interval?
(a)
(b)
(c)
(d)
75.
Do 3 minutes at the 3 metre safety stop
Do 4 minutes at 3 metres
Do 7 minutes at the 3 metre stop
Do 4 minutes at 6 metres, and 3 minutes at the safety stop
What is the minimum Surface Interval?
(a)
(b)
(c)
(d)
78.
It is a measure of the excess Nitrogen still in the tissues after a dive
It is a measure of the maximum time you have on the second dive
It is a measure of the excess Oxygen in the tissues after a previous dive
It is a measure of the excess Nitrogen still in the tissues at the end of the surface
interval
On ascent from a dive to 32.5 metres for 12 minutes, you are at the 3- metre safety
stop. You realize that you have taken just under 6 minutes to ascend from the
bottom to the stop. What should you do?
(a)
(b)
(c)
(d)
77.
To allow divers time to relax before diving again
Bottles may need time to cool after filling
To permit efficient out-gassing of Nitrogen from the first dive
To permit tissues to take on Oxygen again
Which is the most accurate definition of Residual Nitrogen Time?
(a)
(b)
(c)
(d)
76.
10 minutes
15 minutes
20 minutes
25 minutes
Whatever the Dive Leader recommends
10 Minutes
2 Hours
Depends on the RG required at the end of the SI
What is the major concern regarding flying soon after diving?
(a)
(b)
(c)
(d)
Travelling after diving is extremely tiring.
The pressure in the aircraft is lower than atmospheric pressure.
There is no concern after 12 hours
The effects of heat are magnified greatly
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79.
How does a pulmonary / vascular shunt affect decompression?
(a)
(b)
(c)
(d)
80.
Blood, saturated with dissolved gas, can reach the venous side of the heart without
passing through the lungs
There is no real effect after the dive.
Only one of the lungs is correctly operating
Dissolved gas in the blood can enter the arterial side of the heart without going
through the lungs
When planning a ‘square profile’ dive with your dive computer it indicates that your
NDL for the dive will be 22 minutes. When will you depart the seabed?
(a)
(b)
(c)
(d)
After 19 minutes bottom time
At the 22 minute bottom time
After 25 minutes bottom time
It is impossible to calculate without knowing the depth
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CFT Number:
Answer Sheet.
General
Knowledge
Question Answer
Physics
Question
Answer
Physiology
Question
Answer
Dive Tables
Question
1
21
41
61
2
22
42
62
3
23
43
63
4
24
44
64
5
25
45
65
6
26
46
66
7
27
47
67
8
28
48
68
9
29
49
69
10
30
50
70
11
31
51
71
12
32
52
72
13
33
53
73
14
34
54
74
15
35
55
75
16
36
56
76
17
37
57
77
18
38
58
78
19
39
59
79
20
40
60
80
Answer
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Marking.
1.
Marking.
Award 5 marks for each correct answer, and add up each section. Assign grades as
indicated in the following table:
2.
Grade
General Knowledge
Physics
Physiology
Dive Tables
A
95% or 100%
100%
B
85% or 90%
90% or 95%
C
75% or 80%
80% or 85%
D
60% or 65%
70% or 75%
E
50% or 55%
60% or 65%
F
Below 50%
Below 60%
Compensation of marks.
The Jury President can compensate marks in the General Knowledge, Physics and
Physiology sections. Compensation must only be considered if the section for
consideration is in the 50% - 55% range, i.e. “E”. There is NO discretion with the Dive
Tables paper.
3.
Pass marks.
General Knowledge
Physics
Physiology
Dive Tables
60%
60%
60%
70%
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