A.Hydraulic drive systems
B.Electric drive systems
C.Steam drive systems
D.Man-powered drive systems
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A.a master controller or switchbox
B.a group of relays
C.contactors
D.a solenoid brake
A.one meter from the tank bottom and one meter below the tank top
B.one half the ullage of the tank and one meter below the tank top
C.one half the ullage of the tank and one meter above the tank bottom
D.at three meter intervals from the tank top
A.winch speed
B.boom strength
C.load radius
D.cable strength
A.discharging
B.recircling
C.loading
D.taking in
A.one meter from the tank bottom and one meter below the tank top
B.one half the ullage of the tank and one meter below the tank top
C.one half the ullage of the tank and one meter above the tank bottom
D.at three meter intervals from the tank top
最新試題
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
Which method should be used to warm up the pump turbines prior to discharge（）.
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.
Damage by（）shall not be considered as handling damage.
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.
Sudden starts or stops of the boom is likely to cause all of the following except（）.
They（）loading at 1400 hours．
What does “evel-luffing” accomplish during crane operations（）.
How should you signal the crane operator to hoist（）.