This will be ongoing and I'll keep adding to it so come back for more trivia & fun facts.

What is the name of the British diver training agency?
The answer is:The BSAC has been involved in scuba diver training since 1953 and was recognized as the official training agency in the UK in 1954. The training standards set by the BSAC were subsequently adopted by national training agencies worldwide. In the 1980s PADI developed easier training methods that were better suited to holiday destinations and took over as the leading diving training agency.
What country is famous amongest divers for the largest Blue Hole (sink hole) in the world, measuring 1,000 feet in diameter and reaching 440 feet in depth?

The answer is: The Blue Hole is not for the weak harted. The entrance is at about 110 feet deep; deeper than recommended for the recreational diver. Belize also has the second longest barrier reef in the world, only behind the Great Barrier Reef in Australia.
Most people know what the traditional dive flag looks like... the red field with a diagonal white stripe across it... but what OTHER flag can be flown to indicate the presence of divers in the water?

The answer is: The letter "A" (or alpha) flag, is also acceptable as a "Diver down" flag. You can see what it looks like at this website: http://www.nps.gov/isro/graphics/alpha.JPG
In order, what are the terms for front of boat, right side, bathroom, and left side of boat?

The answer is: Bow, starboard, head, port

SCUBA divers are at risk to a number of pressure related hazards. There is one collective term used to describe all these maladies. What is that term?
The answer is: Barotrauma

Before the standard power inflator came along, horse-collar BCs incorporated small CO2 canisters to provide emergency inflation when needed, just like many personal floatation devices do today.

No welding is used in making a typical aluminum scuba tank. Instead, a 32-lb. aluminum slug, 7 inches across, is pressed into shape by 2,500 pounds of pressure in just 20 seconds.
https://youtu.be/IoTK1vcP20E

Where was a majority of the underwater footage of Sea Hunt Filmed?

The underwater footage was shot in various warm water places around the world, from California to Australia, from the Caribbean to the Florida Keys. While fill-in footage was filmed in exotic locales, most of the show's action scenes were shot in a huge aquarium located in California's long-gone Marineland amusement park in Palos Verde's. http://www.vintagetvandmore.com/seahunt.htm
True or False? Devices to supply a diver with air have been tried since the 4th century BC.
True. Alexander the Great is reported to have attempted a dive in a primitive diving bell
In what year did Jacques Cousteau and French engineer Emile Gagnan perfected their aqualung?
1943. The aqualung allowed the diver to stay underwater independently for several hours.
Can you name the world's most venomous creature?
The Australian box jellyfish Chironex fleckeri (a.k.a. Sea Wasp, Indringa, Fire Medusa)
Pollen in your air. Air in a scuba tank can be contaminated with gases like carbon monoxide. Can it also contain pollen?
No. Biological material is completely incinerated because of the enormous partial pressure of oxygen.
Surface supplied air. True or False? Devices to supply a diver with air have been tried since the 4th century BC.
True. Alexander the Great is reported to have attempted a dive in a primitive diving bell
What does SCUBA stand for? Ok that's easy for most, however when was the first self-contained underwater breathing unit developed and by whom?

Self Contained Underwater Breathing Apparatus & Self-Contained Underwater Breathing Apparatus. Although Jacques Cousteau invented the aqualung in 1943, the first true self-contained underwater breathing unit was developed in 1877 by Henry Fleuss. It was a far cry from the diving gear in use today, though.

http://historyofdivingmuseum.blogspot.com/2011/11/henry-fleuss-early-scuba-pioneer.html

The most deadly risk divers face underwater is:

A. Sharks
B. Anxiety and Panic
C. Malfunctioning equipment
D. Hypothermia

Answer: C. Malfunctioning equipment.
When is the last time your gear was serviced?
Do you take proper care of your gear?

Dive table s are based on the assumption that:

a) the diver will make no more than three dives a day
b) all bottom time is spent at the deepest depth reached
c) the surface interval will be at least one hour between dives
d) any subsequent dive will be shallower than the one before
e) there will be no multi-level diving

Answer: b. all bottom time is spent at the deepest depth reached