Class II Oil

What is the TLV-TWA for CO?

• 25%

• 25 ppm

• 5 ppm

• 250

What is the flammability range for methane?

• 5%-15% by vol

• 5%-15% by LEL

• 5%-15% HEL

• all are correct

What is the other name for TLV?

• OEL

• PEL

• REL

• All are correct

What is the OEL for H2S?

• 25 ppm

• 50 ppm

• 0.5%

• 5 ppm

What should be the hydrocarbon % before entering the enclosed space?

• >1% LEL

• <1% LEL

• <1% Vol

• All are wrong

Tool box meeting should be carried out with ____

• engineers only

• engineers and engine ratings

• all the officers and ratings

• engine ratings only

What will you do when the risk is high?

• carry out the job

• do barbeque party

• call the chief engineer

• will not carry out the job

Who should be contacted first in case of oil spill in US waters?

• barge master

• Qualified individual

• barge chief officer

• class survey