equipment

Question 1

Which of the following cylinder markings designates the type of metal used to construct the scuba cylinder?

3AL
7@89
675482
3000

Answer 1

3AL

Question 2

Which of the following cylinder markings designates the hydrostatic test date?

3AL
7@89
675482
3000

Answer 2

7@89

july 1989

Question 3

The (+) designation that appears on _____________ cylinders denotes that the cylinder may be overfilled to ________ beyond its working pressure.

Answer 3

steel
10%

Question 4

TRUE OR FALSE …
Aluminum cylinders were introduced because aluminum is a stronger metal and enables higher working pressures than in steel cylinders.

Answer 4

False
Intro due to corrosion resistant

Question 5

What are the advantages of a DIN connector over the standard yoke screw system?

Answer 5

stronger
better seal

Question 6

To prevent a scuba cylinder from rupturing due to overpressurization, a burst disk is installed in the _____________, and is designed to rupture when the cylinder pressure rises above about _____________ of the cylinder’s rated pressure.

Answer 6

valve
140%

Question 7

TRUE OR FALSE
A burst disk only needs to be replaced if it ruptures.

Answer 7

false

Question 8

Why does a burst disk vent to the sides rather than straight out?

Answer 8

to prevent the cylinder from pretentionally spinning