FREE IDC Dive Theory & Safety Standards Questions and Answers

Question 1

What is the primary purpose of dive tables?

Accepted Answer

To plan safe dive profiles

Answer

To measure water temperature.

Answer

To record marine species.

Answer

To schedule dive trips.

Question 2

What causes decompression sickness?

Accepted Answer

Rapid ascent causing gas bubbles

Answer

Holding breath underwater.

Answer

Cold water temperature.

Answer

Wearing heavy gear.

Question 3

What is the recommended ascent rate to prevent decompression sickness?

Accepted Answer

No faster than 30 feet per minute

Answer

100 feet per minute.

Answer

No ascent needed.

Answer

Immediate surfacing.

Question 4

Why is a safety stop important during a dive?

Accepted Answer

To reduce nitrogen levels safely

Answer

To rest underwater.

Answer

To check equipment.

Answer

To take photos.

Question 5

What is nitrogen narcosis?

Accepted Answer

Impaired judgment underwater

Answer

Sunburn from reflection.

Answer

Water intoxication.

Answer

Muscle cramps.

Question 6

How often should dive equipment be inspected?

Accepted Answer

Before every dive

Answer

Once a year.

Answer

Never.

Answer

Only after a problem occurs.

Question 7

What does the term 'no-decompression limit' mean?

Accepted Answer

Max time without decompression stop

Answer

Minimum surface time needed.

Answer

Total dive time.

Answer

Time to descend.

Question 8

Why is buddy diving recommended?

Accepted Answer

For mutual safety

Answer

For competition.

Answer

To share equipment.

Answer

For fun only.

Question 9

What should you do if you suspect decompression sickness?

Accepted Answer

Seek medical help immediately

Answer

Continue diving.

Answer

Ignore symptoms.

Answer

Drink alcohol.