Cracks may be prevented from developing at the corners of welded plating inserts by().
A、squaring the corners
B、rounding the corners
C、plug welding the corners
D、slot welding the corners
A、squaring the corners
B、rounding the corners
C、plug welding the corners
D、slot welding the corners
A、cylinder compression pressure may not be high enough B、cylinder compression temperature may be too high C、fuel oil injection pressure may not be high enough D、scavenge and purge process is incomplete
A、The overall condition of the bearing surface should be examined B、The shaft liner should be inspected for cracks and tested to insure a tight fit C、The stern tube should be tested for cracks with dye penetrant D、all of above
A、may always be complete and up-to-date B、may not always be complete and up-to-date C、may sometimes be complete and up-to-date D、may not sometimes be complete and up-to-date
A、A.Toxic gasses may be present B、B.Flammable gasses may be present C、C.Liquid muds may flood adjoining spaces D、D.An oxygen-deficient atmosphere may be present
A、It's of no use for navigation and would be removed with notice B、It's useful in navigation and may be removed without notice C、It's helpless in navigation and may be removed without notice D、It's helpful in navigation and may be removed without notice
A、bilge water may enter the exhaust pipe B、entry of air may cause vapor lock C、carbon monoxide may enter the interior of the vessel D、the joint gaskets may be blown
A、A.shall be carried on deck B、B.shall be carried under deck C、C.may be carried on or under deck D、D.may not be carried on or under deck