Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?()
Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?()
A vessel emitting harmful substances into the air or spilling oil into the sea is a().
Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?()
Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?()
Electric insulation is made of organic substances and so gradually () with age.
Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?()
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called().
A vessel emitting harmful substances into the air or spilling oil into the sea is a().
On a tank vessel, which of the following substances would be burning in a class "B" fire?()