In a ordinary cargo crane, () is fitted to rotate the crane.
- Athe slewing motor
- Bthe lulling motor
- Cthe hoisting motor
- Dnone of the above
In a ordinary cargo crane, () is fitted to rotate the crane.
1、In a general cargo crane, () is fitted
In a general cargo crane, () is fitted to raise or lower the jib.Athe slewing motorBthe luffing motorCthe hoisting motorDnone of the above
2、The crane is usually mounted on a pede
The crane is usually mounted on a pedestal to offer adequate () to the operator.AtimeBspaceClengthDvisibility
3、If any cargo is found not in good orde
If any cargo is found not in good order,().Ait is usually cancelledBits bill of lading not signedCthe shipper pays for itDa remark is made for it
4、When a cargo boom or crane is rated at
When a cargo boom or crane is rated at varying capacities,there will be a table at the controls which relates safe working load to().Awinch speedBboom strengthCload radiusDcable strength
5、What is a lighted safe water mark fitt
What is a lighted safe water mark fitted with to aid in its identification().AA spherical topmarkBRed and white retroreflective materialCA sequential numberDA red and white octago
6、Cargo vessels being navigated,and fitt
Cargo vessels being navigated,and fitted with emergency lighting and power systems,shall have their emergency systems tested at least once().Aa monthBin each weekCin every 6 monthsDin every 12 month