A.less jerky starts
B.less jerky stops
C.overheating worries
D.none of the overheating worries
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A.breaking a cargo runner
B.parting guys topping lifts
C.carrying away a block
D.overheating the resistors and eventually burning out
A.the speed to be retarded by the friction brake
B.a load to go downward at full speed
C.the circuit breaker to turn off
D.the resistors to overheat and eventually burn out
最新試題
Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
Pedestal cranes have limit switches to restrict movement of which function（s）（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
When viewed from above，the best position for the guy in relation to the boom is（）.