AB Lifesaving and Survival Craft 3

Question 1

What does a hydrostatic release unit (HRU) on a liferaft do?

Accepted Answer

Releases the raft from its cradle when a vessel sinks to 1.5-4 meters depth

Answer

The HRU automatically releases the liferaft from its cradle when the vessel sinks to a depth of 1.5 to 4 meters.

Question 2

Which signal indicates that crew should proceed to muster stations during an emergency?

Accepted Answer

Seven or more short blasts followed by one long blast on the whistle

Answer

The abandon ship alarm is seven or more short blasts followed by one long blast on the ship's whistle or alarm system.

Question 3

What is the maximum number of persons a 20-person capacity liferaft is required to hold in an emergency?

Accepted Answer

20

Answer

A liferaft is certified for a specific number of persons and must not exceed that rated capacity.

Question 4

How long must a lifeboat's propulsion system be capable of operating in still water at full load?

Accepted Answer

24 hours

Answer

SOLAS requires lifeboat engines to have sufficient fuel to operate for 24 hours at 6 knots.

Question 5

When should a crewmember don an immersion suit?

Accepted Answer

During any emergency where abandoning ship may be required

Answer

Immersion suits should be donned whenever there is a risk of abandoning ship, before entering the water.

(AB) Able Seaman Exam Practice Test