1. When a diver’s weight is greater than the weight of the water she displaces, she is said to be

lighter than water
positively buoyant
negatively buoyant
neutrally buoyant

2. If a diver is firmly on the bottom or is descending she is said to be

lighter than water
positively buoyant
negatively buoyant
neutrally buoyant

3. Two pieces of equipment that allow adjustment of buoyancy are:

the first and second stage regulators
the BCD and weight belt
the harness and buckle
once in the water, buoyancy cannot be adjusted

4. If a diver is accustomed to diving in the sea, but dives in a fresh water lake:

weight must be added to the weight belt
weight must be removed from the weight belt
an altitude correction must be made to the dive table
no changes to the weight system need to be made

5. Because water is heavier and more dense than air, to conserve energy and prevent over exertion, a diver should:

a) move slowly
b) breath slowly and deeply
c) stop swimming if over exhausted and rest
d) all of the above

6. When a diver fills a balloon with air at 33ft (10m) in seawater and lets it travel to the surface, the balloon’s volume will:

increase 4 times
decrease to ¼ volume
increase 2 times
decrease to ½ volume

7. The pressure at 99ft (30m) of seawater is:

3 atmospheres
4 atmospheres
5 atmospheres
none of the above

8. At ___________ air is four times denser than air at the surface.

66 ft (20m) seawater
99 ft (30m) seawater
132 ft (40m) seawater
air does not change density as depth increase

9. When breathing at a normal rate, a tank of air last a diver 30 min @ 33 ft seawater. This same tank will last:

15 min @ 99 ft (30m) of seawater
20 min @ 66 ft (20m) of seawater
1 hr @ the surface
all of the above

10. To adjust buoyancy as a diver ascends he should:

not hold his breath
let expanding air out of the BC
add air to the BC
expanding air in the BC will carry the diver safely to the surface without any adjustment

11. Underwater through the lens of a dive mask a diver sees objects as though they were:

smaller and farther away
nearer and larger
with less color
with more color

12. Light absorption underwater filters out colors until at depths all color appear gray or black

True
False

13. When a diver is underwater, sounds:

travel faster and seem louder and nearer
are difficult to determine where they come from
originating above the surface are difficult to hear
all of the above

14. During descents, a diver should equalize pressure in the middle ear

whenever pain is felt
frequently during the descent before pain is felt
using the Val Kellerberger power salvo technique
the middle ear doesn’t require equalization

15. When external pressure is greater than the pressure inside the middle ear, the diver feels

nauseous
a squeeze
a reverse squeeze
a reverse block

16. Because of the possibility of an air expansion injury to the lungs, the First and Foremost rule in scuba diving is

always dive with a buddy
always have an alternate air source available
never hold your breath
never dive in conditions beyond your capability

17. Divers with colds or allergy congestion in the nose, throat & sinuses should

medicate before diving
seek medical treatment from a qualified physician before diving if symptoms are severe or long term
may not dive until symptoms are gone
b & c are correct

18. Due to frictional forces in the airway it may become __________ to breath the deeper you dive

easier
harder
impossible
none of the above

19. If a diver wears a wet suit for thermal protection

she doesn’t have worry about heat loss
heat is only lost through the head
heat loss is only slowed down
all of the above

20. If you begin to shiver while diving, the appropriate action is

ascend to a shallower depth where there is warmer water
wait to see if the shivering stops
exit the water with your buddy and seek warmth
all of the above

21. Nitrogen gas is an important thing for a diver to know about because

makes up about 78% of the air that we breathe
under pressure it produces a narcotic effect on the body called nitrogen narcosis
c) when the body absorbs too much nitrogen under pressure, sudden decompression may cause Decompression Illness
all of the above

 

22. The anesthetic effect of nitrogen produced on the body by deep depths is called

the bends
nitrogen narcosis
DCI
drunkenness

23. Decompression Illness (DCI) is caused by excess nitrogen in the body’s tissues forming bubbles. The factors that contribute to DCI may be

exceeding depth and bottom time limits
temperature and heavy exercise
older age and illness
all of the above

24. A scuba regulator is designed to

supply air only demand
fail in a free-flowing mode
provide air to a diver at ambient pressure
all of the above

25. The following scuba equipment is not required for safe diving

Buoyancy Compensation Devices (BCD’s)
knives
alternate air sources
depth gage and timing devices

26. Weight belts are always put on with a _____________ for safety

compensating buckle
right hand release
lead weight
web belt

27. In the US, compressed air tanks are required to be visually inspected every ______ and hydrostatically tested every ________.

1 year, 5 years
5 years, year
2 years, 5 years
5 years, 2 years

28. If the air from your scuba tank tastes or smells bad the correct action to take is

be on the lookout for symptoms of nausea, headaches, or dizziness
don’t use the air
use the air, but discontinue the dive if you notice cherry red lips and nail beds
if you become unconscious, discontinue the dive

29. Alternate 2^nd stage regulators (octopus) should be worn

tucked into your BCD vest or pocket to avoid dangling
over the left shoulder for easy access
visibly attached to your upper torso
unattached to your equipment for easy recognition

30. The SPG assists the diver in measuring the following

the depth of the diver in the water column
bottom time
compressed air tank pressure
amount of nitrogen absorbed

31. BCD’s are used by the diver for

positive buoyancy at the surface
maintaining neutral buoyancy in the water column
compensating for wet suit compression
all of the above

32. A diver can determine the remaining amount of air in the compressed air tank by

noting the pressure on the SPG
the weight of the tank
the position of the J valve
the bottom time

33. Upon with agreement with your buddy to ascend, you and your buddy should adjust your BCD to ________ prior to beginning the ascent

dump all of the air
attain neutral buoyancy
become positively buoyant
get comfortable

34. Safe diving practices require that divers dive together in buddy pairs. The benefits of buddy pairs include

ability to provide assistance to your buddy
shared diving fun
double checking depths & bottom times
all of the above

35. The best bottom compositions for diving are

rock, coral and vegetation
sandy bottoms
sedimentary bottoms
all of the above

36. Underwater visibility is not affected by the following factor

suspended particles
water temperature
water movement
bottom composition

37. Longshore currents are caused by

tidal action
heating & cooling of the water
wave action moving at an angle to the shore
off shore winds

38. You encounter an aggressive animal while on a dive the best course of action is

immediately exit the water
remain calm, descend to the bottom, keep eye contact and wait for the animal to leave
get back to back with your buddy so that you can see in all directions
get help from your dive leader
 

39. When ocean diving, the best tidal conditions are provided at

low tide
high tide
noon
night

40. You are caught in long shore current at the surface, you should ________ and ________

establish positive buoyancy, swim toward shore
wave for help, swim to hold your position
descend to the bottom and wait
swim with current, hurry

For questions 41 thru 44 refer to the figures below

41. The hand signal shown in figure 41 means

OK at the surface
are you OK, I’m OK (submerged)
this good
none of the above

 

42. The hand signal in figure 42 means

I’m low on air
let’s end the dive
are you OK?
I’m out of air

43. The hand signal in figure 43 means

I’m OK
I’m low on air
let’s go up
something is wrong

44. The hand signal in figure 44 means

I need assistance (at the surface)
how are you, I am fine
I’m OK
none of the above

45. The first priority in assisting a diver at the surface is to

calm them down
provide them with positive buoyancy
make sure they are breathing
help them back to shore

46. Overexertion can be prevented by

breathing full deep breaths
moving slowly
pacing yourself
all of the above

47. In an emergency out of air situation, the best choice for making an ascent to the surface is

alternate air source ascent
normal swimming ascent
emergency swimming ascent
ditch & don

48. Dive boats are active places. When you are not using your equipment it should be _________.

kept in your bunk
stowed in a safe place
kept in your gear bag and left on the deck for easy access
kept off the deck and hung to dry

49. The recommended maximum ascent rate under all conditions is

30ft (10m)/min
60ft (20m)/min
30ft (10m)/sec
60ft (20m)/sec

50. If the No Decompression Limits (NDL) are accidentally exceeded by no more than 5min, you must

do a safety stop at 15ft for 3min
do a safety stop at 15ft for 5min
ascend to the surface & not dive the rest of the day
stop at 10ft for 10min

51. The maximum depth limit for recreational diving is _____

40ft (12m)
60ft (18m)
130ft (40m)
140ft (43m)

52. Altitude diving is defined as diving altitudes greater than ______ above sea level.

1000ft (300m)
500ft (150m)
5000ft (1524m)
10,000ft (3000m)

53. Safe diving practices require a minimum _______ surface interval between your last dive before you fly or drive to altitude.

24 hr
12 hr
6 hr
no surface interval is needed

54. Dive flags must be used when

diving in an area accessible by boats
required by law
when you need to make your presence known
all of the above

55. Two divers are planning an ocean dive to a depth of 59ft (18m) for 40min. After a surface interval of 45 mins, they wish to return to a depth 50ft (15m). What is the maximum allowable bottom time for the 2^nd dive?

47 min
23 min
40 min
38 min

56. Two divers are planning an ocean dive where the water temperature is 50 degrees F (10 degrees C). The divers plan to dive to depth of 50ft (15m). What is the maximum allowable bottom time for this dive?

50 min
40 min
115 min
55 min

57. Dive computers monitor actual nitrogen levels in your body during a dive

True
False

58. If you exceed the maximum bottom time calculated by your dive computer less than 5 min

you must make an emergency decompression stop at 15ft for 5min
ascend directly to the surface
rigorously follow your computer’s ascent schedule
end your diving day

59. You and a friend can share a dive computer if

you stay together as dive buddies
you use the computer first, and your friend uses it on a different dive
you are about the same size and age
you cannot share the use of a dive computer


60. If the battery of your dive computer fails

discontinue your dive and make your next dive on tables
use another dive computer for your next dive
unless you have been accurately keeping track of your dive profile on a table, discontinue diving until the next day
continue the dive on your buddies computer

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