The boom indicator on a crane will indicate the ______.
A.Length of the boom
B.Angle of the boom
C.Lifting capacity of the boom
D.Direction of the boom
第1题
A.less jerky starts
B.less jerky stops
C.overheating worries
D.none of the overheating worries
第2题
A.① only
B.② only
C.Both ① and ②
D.Neither ① nor ②
第3题
A.Maximum counter weight required
B.Minimum horsepower required
C.Hoist rope strength
D.Allowable load
第4题
A.Date and description of each failure
B.Average load in pounds for each usage
C.Total number of lifts for each usage
D.All of the above
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