NAUI Underwater Skills & Safety Procedures 2

Question 1

When performing a controlled emergency swimming ascent (CESA), a diver should:

Accepted Answer

Ascend slowly while continuously exhaling and making an 'ahh' sound

Answer

During a CESA, the diver must continuously exhale to prevent lung overexpansion as air expands with decreasing pressure.

Question 2

What is the primary purpose of the 'stop, think, breathe, act' sequence when a diver encounters a problem underwater?

Accepted Answer

To prevent panic and allow rational decision-making

Answer

This sequence helps prevent panic, which is a leading factor in diving fatalities, by forcing deliberate thought before action.

Question 3

A diver notices their buddy is not responding to signals and appears rigid underwater. The first action should be:

Accepted Answer

Check for consciousness by tapping and observing

Answer

Assessing the buddy's responsiveness is the first step before initiating any rescue or ascent procedure.

Question 4

When sharing air using an alternate air source, the donor diver should:

Accepted Answer

Stay close to the receiver and ascend together controlling rate

Answer

Both divers must ascend together at a controlled rate while staying close to maintain the air-sharing connection.

Question 5

Which condition is most likely to cause a diver to experience mask squeeze?

Accepted Answer

Failing to exhale through the nose during descent

Answer

During descent, increased pressure creates a vacuum inside the mask unless the diver equalizes by exhaling a small amount of air through the nose.

(NAUI) National Association of Underwater Instructors Certification Practice Test