Class II Session 2

Which gives the hydrocarbon content of % by vol?

• Explosivemeter

• Explosimeter

• Tankscope

• All are correct

How the hydrocarbon content below LEL range is burning in explosimeter?

• Due to catalytic hot filament

• Due to lean range

• Due to rich range

• All are correct

During purging, ____ has to be used.

• all are wrong

• o2 meter

• explosimeter

• tankscope

If LEL of HC gas is 1% by volume, what is equal to 1% LEL?

• 0.01% by vol

• 0.0001% by vol

• 0.01 by vol

• 1% by vol

Why purging needs to be carried out in the LNG bunker tank before gas freeing or ventilation?

• To avoid the gas to enter the flammability range

• To release excess pressure

• To increase the vacuum

• To create explosion

Code C of ORB deals with ____.

• oily residues

• automatic transfer of bilge water

• non-automatic transfer of bilge water

• all are correct

Which code in ORB Deals with manual transfer of oily residues?

• C 11.4

• C 12.4

• C 12.3

• D1

Weekly entry of bilge holding tank retention capacity is mandatory.

• False

• True

Under which code, weekly entry of bilge holding tank retention capacity is recorded?

• Code I

• Code II

• Code D

• Code E