When finish work on the oil separator, you should()firstly.
A、cut off the power
B、cut off the oil inlet
C、open guide water valve
D、close oil outlet value
A、cut off the power
B、cut off the oil inlet
C、open guide water valve
D、close oil outlet value
A、When oilspilling happens on board, the sailors’ work is to do oil-cleaning. B、When oilspilling happens on board, the sailors’ work is painting. C、When oilspilling happens on board, the sailors’ work is to do some repair work. D、When oilspilling happens on board, the captain is in over command of it.
A、Keep a load on the hoist until all personnel are finished working B、Set the load on a movable dolly when transportation may be needed C、Have one man keep a hand on the load to steady it D、Insure that the lifting gear capacity is not exceeded
A、A.when can the stevedores finish loading B、B.when will the stevedores finish loading C、C.when the stevedores can finish loading D、D.when the stevedores finish loading can
A、A.working on the rig floor B、B.working over water C、C.working on the pipe racks D、D.operating line throwing equipment
A、When it is a DC machine B、When it is an AC machine C、Any machine that operates on over 100 volts D、Only when working on wet steel plates