A、warm-up allows the hydraulic system to become charged with oil
B、warm-up allows the relief valves to be properly tested
C、hydraulic strainers operate only during the warm-up period
D、hydraulic fluid must be at the proper viscosity
更多“Hydraulic cranes must be properly warmed-up before being operated because （）.”相关的问题
A、Bunkering barge alongside B、Potable water spill on deck C、Crane hydraulic hose bursts D、Trim greater than 4 feet
A、Electro-hydraulic units B、Steam units C、Independent internal combustion power units D、All of the above
A、hoisting system only B、hoisting system and luffing system C、hoisting system and slew and slewing system D、slewing system only
A、is the SWL of the crane B、are the SWL of the crane C、the SWL of the crane is D、the SWL of the crane are
A、A.A centerline crane can never be operated in tandem B、B.One crane is able to work one end of two adjacent hatches C、C.These cranes are more economical and weigh less than outboard-mounted cranes D、D.One crane is able to work both sides of the ship
A、is the S.W.L.of the crane B、are the S.W.L. of the crane C、the S.W.L. of the crane is D、the S.W.L. of the crane are
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