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Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect full line draining and mopping up of any water in tanks before loading ______．
A.purging with hydrocarbon gas
B.gas-freeing operations
C.maintaining an inert condition
D.full line draining and mopping up of any water
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更多 “ Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect full line draining and mopping up of any water in tanks before loading ______．A.purging with hydrocarbon gasB.gas-freeing operationsC.maintaining an inert conditionD.full line draining and mopping up of any water ” 相关考题
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( )is monitored on the drain tank and header tank by magnetic switches with a 20seconds delay to prevent false alarms due to surging
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working at intervals and properly heatingB
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improving impulse of water supplyD
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Petroleum, sunlight and wind power.B
Gas, water and fossil fuels.C
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in exitC
in the upper partD
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bilge tankB
sludge tankC
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单选题What is one effect of running a diesel engine at too cool a temperature? （）A
Buildup of sludge in the lubricating systemB
Excessive fuel consumptionC
Severe heat stresses on mechanical partsD
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increase cooling water hardnessD
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单选题（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A
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paintsC
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The cofferdamC
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Both；andB
Neither；norC
Either；orD
Both；or
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