Tanker Familiarization Safety and Emergency Procedures 5

Question 1

During a cargo vapor release on a chemical tanker, wind direction is important because:

Accepted Answer

It affects where toxic or flammable vapors will drift, defining safe and hazardous zones

Answer

Knowing wind direction allows the emergency team to establish safe muster areas upwind and predict where vapors will disperse.

Question 2

An EPIRB (Emergency Position Indicating Radio Beacon) on a tanker activates automatically when:

Accepted Answer

It is submerged in water to a depth of 1–4 meters

Answer

Hydrostatic release mechanisms activate EPIRBs automatically upon immersion at 1–4 meters depth, transmitting a distress signal even if the crew cannot manually activate it.

Question 3

What is a 'Ship-to-Shore Safety Checklist' used for on tankers during cargo operations?

Accepted Answer

Verifying that both vessel and terminal have completed all safety checks before cargo transfer begins

Answer

The Ship-to-Shore Safety Checklist (per ISGOTT) ensures both parties confirm safe conditions — communications, ESD, bonding, etc. — before starting transfer.

Question 4

The maximum permitted concentration of H2S (hydrogen sulfide) in the working atmosphere on a tanker is:

Accepted Answer

10 ppm TWA (OSHA permissible exposure limit)

Answer

OSHA's permissible exposure limit for H2S is 10 ppm as an 8-hour TWA; higher concentrations rapidly cause incapacitation and death.

Question 5

When a cargo tank pressure-vacuum (P/V) valve opens, it indicates:

Accepted Answer

Tank pressure or vacuum has reached the valve's set point, venting to prevent structural damage

Answer

P/V valves protect cargo tank structural integrity by relieving excess pressure or vacuum automatically at their calibrated set points.

Tanker Familiarization Practice Test

Tanker Familiarization Practice Test

Tanker Familiarization Safety and Emergency Procedures 5