Tanker Familiarization Tanker Safety and PPE 3

Question 1

What is the safe working pressure limit concept known as MAWP in tanker operations?

Accepted Answer

Maximum Allowable Working Pressure — the upper pressure limit for cargo tanks and piping

Answer

MAWP is the maximum pressure at which a pressure vessel or piping system is designed to operate safely.

Question 2

Which condition makes a tanker cargo tank safe for hot work after cargo discharge?

Accepted Answer

Gas-free certificate issued by a competent person after testing below LEL

Answer

A gas-free certificate confirms the atmosphere is below the lower explosive limit and safe for ignition sources like welding.

Question 3

Eye protection rated for chemical splash protection must comply with which ANSI standard?

Accepted Answer

ANSI Z87.1

Answer

ANSI Z87.1 covers performance requirements for eye and face protection devices, including splash-rated chemical goggles.

Question 4

During an ammonia refrigerated cargo operation, what specific PPE addition is required beyond standard chemical suit and SCBA?

Accepted Answer

Insulated cryogenic gloves rated to −60°C

Answer

Refrigerated ammonia (anhydrous) is cryogenic; insulated cryogenic gloves protect against cold burns in addition to chemical exposure.

Question 5

A portable gas detector alarm activates at 20% LEL on the main deck. What action is required?

Accepted Answer

Stop all ignition sources and investigate the leak immediately

Answer

An alarm at 20% LEL requires eliminating all ignition sources and identifying the gas source before any work continues.

Tanker Familiarization Practice Test