A.butterfly valve
B.spectacle valve
C.check valve
D.globe valve
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A.before the gripes are removed
B.before loading the passengers
C.after loading the passengers
D.after the boat is afloat
A.does not exceed
B.should exceed
C.should be up to
D.should be no more than
A.environmental loading
B.variable loading
C.fixed loading
D.basic loading
A.loading
B.leaving
C.arriving
D.sailing
A.booster pump coming on the line and discharging properly
B.booster pump failing to start
C.booster pump being lined up in the wrong direction
D.ship's pump speeding up
最新試題
Most pedestal crane power is provided by（）.
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
What does “evel-luffing” accomplish during crane operations（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
Running an electric winch at slow speed over a long period of time causes（）.