PADI Scuba Equipment Assembly & Function 5

Question 1

What is the standard color coding used for an alternate air source (octopus) second stage in recreational diving?

Accepted Answer

Yellow or bright orange

Answer

Bright yellow or orange coloring makes the alternate air source highly visible so a buddy can quickly locate it in an out-of-air emergency.

Question 2

During a buddy check, your buddy's BCD inflates but does not deflate when the deflate button is pressed. What is the likely cause?

Accepted Answer

The deflate button or dump mechanism is stuck or disconnected

Answer

A stuck or mechanically disconnected deflate button prevents the exhaust valve from opening, trapping air in the BCD.

Question 3

What does a visual cylinder inspection (VCI) sticker on a scuba tank indicate?

Accepted Answer

The interior was visually inspected for corrosion and damage within the past year

Answer

A valid VCI sticker shows the tank interior was inspected for rust, pitting, or debris within the last 12 months.

Question 4

Why is it important to open a cylinder valve slowly before doing a full open?

Accepted Answer

Rapid opening can over-pressurize the regulator first stage

Answer

Opening the valve rapidly causes an adiabatic pressure spike that can damage O-rings and internal regulator components, and creates a fire risk with oxygen-enriched gases.

Question 5

What is the primary advantage of an integrated weight system in a BCD over a traditional weight belt?

Accepted Answer

Weights can be jettisoned while keeping the BCD, and are less likely to slide out of position

Answer

Integrated weights stay properly positioned throughout the dive and can be released in an emergency while retaining the BCD for buoyancy.

PADI - Professional Association of Diving Instructors Practice Test

PADI - Professional Association of Diving Instructors Practice Test

PADI Scuba Equipment Assembly & Function 5