CMC NFPA 306 Standard Application 2

Question 1

Under NFPA 306, what action must be taken before any hot work is performed in a space that previously contained flammable cargo?

Accepted Answer

Obtain a Marine Chemist Certificate or Coast Guard permit

Answer

Ventilate the space for at least 24 hours

Answer

Conduct a visual inspection only

Answer

Install a carbon monoxide detector

Question 2

Which atmospheric condition would cause a Marine Chemist to label a space 'Not Safe for Workers' under NFPA 306?

Accepted Answer

Oxygen level below 19.5%

Answer

Oxygen level of 20.8%

Answer

LEL reading of 0%

Answer

Carbon dioxide level of 300 ppm

Question 3

How does NFPA 306 define a 'tank' for the purposes of its scope?

Accepted Answer

Any vessel compartment designed to carry liquid cargo or fuel

Answer

Any enclosed space used exclusively for cargo storage above deck

Answer

Only double-bottom spaces containing ballast water

Answer

A pressure vessel rated above 15 psi

Question 4

When inspecting a space under NFPA 306, at what LEL reading is hot work generally considered permissible?

Accepted Answer

Below 10% LEL

Answer

Below 1% LEL

Answer

At exactly 0% LEL

Answer

Below 25% LEL

Question 5

According to NFPA 306, how frequently must re-inspection occur when continuous ventilation cannot be maintained in a hot-work space?

Accepted Answer

Before each resumption of hot work

Answer

Every 8 hours

Answer

At the start of each shift only

Answer

Once every 24 hours

Question 6

Which document does NFPA 306 require to be posted at the entrance of a space certified for hot work?

Accepted Answer

The Marine Chemist Certificate or equivalent permit

Answer

The vessel's Certificate of Inspection

Answer

A Material Safety Data Sheet for the last cargo

Answer

The shipyard hot work permit only

Question 7

Under NFPA 306, which party bears primary responsibility for ensuring that conditions remain safe after a Marine Chemist has issued a certificate?

Accepted Answer

The employer or person in charge of the work

Answer

The original Marine Chemist who issued the certificate

Answer

The ship's flag state authority

Answer

The local fire marshal