Knowledge Review 5

Question 1

My buddy and I have just finished a dive to 15 metres/50 feet for 60 minutes. We want to return to the same site and depth and stay another 60 minutes. We can _______ to see about how long we have to remain at the surface to have enough no stop time.
A) wait and check our no stop times on our computers periodically.
B) use the dive computer plan mode, if our computers have them
C) use a dive planning app
D) check the RDP Table or eRDPml

Answer 1

A) wait and check our no stop times on our computers periodically
B) use the dive computer plan mode, if our computers have them
C) use a dive planning app
D) check the RDP Table or eRDPml

Question 2

Going to altitude after diving may be a problem because:
A) dive computers read too deep at altitude
B) oxygen toxicity problems results from the thinner air
C) most decompression models are based on surfacing at sea level

Answer 2

C) most decompression models are based on surfacing at sea level

Question 3

I've just finished a single no stop dive with my buddy. We have not been diving in the past several days, and this is the only dive we make. Based on current recommendations, the minimum surface interval before we fly is:
A) 6 hours
B) 12 hours
C) 18 hours
D) 24 hours

Answer 3

B) 12 hours

Question 4

I need to use special altitude diving procedures when diving at an altitude greater than:
A) 150 metres/500 feet
B) 300 metres/1000 feet
C) 600 metres/2000 feet
D) 3000 metres/10,000 feet

Answer 4

B) 300 metres/1000 feet

Question 5

If I am cold or exercise a lot during a dive, I may surface with more nitrogen than calculated by my dive computer or dive tables.
True or False

Answer 5

True

Question 6

At the end of a dive, my buddy’s foot gets tangled in an abandoned fishing net. It takes five minutes to get free, but that delays our ascent making us exceed our no stop limit. This means that before we surface, we will have to make a(n)_______ stop to return our nitrogen level from outside the accepted limits.
A) safety
B) emergency decompression

Answer 6

B) emergency decompression

Question 7

On a dive boat, after coming aboard two divers discover they accidentally surfaced without making an emergency decompression stop. They should ________, and not dive for at least 24 hours.
A) re-enter the water and make the stops
B) exercise the drink fluids
C) relax, breathe oxygen, and check themselves for DCS symptoms

Answer 7

C) relax, breathe oxygen, and check themselves for DCS symptoms

Question 8

In an emergency decompression situation, I find I won’t have enough air to complete all the required stop time. I should:
A) stay at the stop until out of air, then make a Controlled Emergency Swimming Ascent.
B) surface immediately and not make the stop at all
C) stop as long as I can, but save enough air to surface and exit safely

Answer 8

C) stop as long as I can, but save enough air to surface and exit safely

Question 9

To help a diver with suspected decompression illness, I should:
A) monitor the diver’s breathing and provide CPR as necessary
B) contact emergency medical care
C) have the diver sit or stand as much as possible
D) provide emergency oxygen

Answer 9

A) monitor the diver’s breathing and provide CPR as necessary
B) contact emergency medical care
D) provide emergency oxygen

Question 10

Nearly all cases of decompression illness require treatment:
A) in the water
B) in a recompression chamber
C) with bubble-dissolving drugs

Answer 10

B) in a recompression chamber

Question 11

During a dive, I feel I’m having trouble thinking clearly. I should:
A) carefully continue
B) signal my buddy and ascend to a shallower depth

Answer 11

B) signal my buddy and ascend to a shallower depth

Question 12

On a standard underwater compass, the magnetic north needles:
A) points to magnetic north
B) indicates my travel direction
C) point south on a reciprocal course
D) is absent

Answer 12

A) points to magnetic north

Question 13

My buddy and I want to travel in a straight line using a compass, I should point the _____ in our desired travel direction, then rotate the ______ until the _____ is/are over the ________.
A) lubber line, magnetic north needle, heading references
B) magnetic north needle, bezel, index marks, lubber line
C) heading references, bezel, lubber line, magnetic north needle
D) lubber line, bezel, index marks, magnetic north needle

Answer 13

D) lubber line, bezel, index marks, magnetic north needle

Question 14

As a PADI Open Water Diver, I have been trained to a maximum depth of \_\_\_\_\_\_ (or the actual depth I reached, if shallower).
A) 12 metres/40 feet
B) 18 metres/60 feet
C) 24 metres/80 feet
D) 30 metres/100 feet

Answer 14

B) 18 metres/60 feet