When inspecting piston rings through the ports of a two-stroke/cycle diesel engine, black areas on the sealing surfaces are the result of （）

A、insufficient lubrication

B、improper piston cooling

C、blow-by

D、overload operation

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第1题

[单选题] The emergency communication set’s transmitter should not be tested except when（）by a public radio inspector.

A、inspecting B、inspected C、inspects D、having inspected

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第2题

[] Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.

A、A.when the remaining charge volume is less than 90 percent of the required VOLUME B、B.at each inspection for certification C、C.at each annual inspection D、D.when the weight loss exceeds 10% of weight of charge

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第3题

[单选题] When the tail-shaft is drawn from a vessel in dry-dock, which of the following inspections is required to be carried out?（）

A、The propeller hub taper and shaft keyway should be inspected for cracks or corrosion B、The stern bearing alignment with the stern frame should be checked C、The interior of the stern tube should be inspected for leaks D、The shaft liner should be removed and inspected

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第4题

[单选题] Which action should be taken when an auxiliary boiler in is operation?（）

A、Clean all electrical connections B、Lift the relief valves by hand C、Inspect and clean all solenoid valves D、Inspect for oil and water leaks

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第5题

[单选题] Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?（）

A、clean the flame scanner photocell window B、Inspect and clean all solenoid valves C、lift the safety valves by hand D、Inspect for oil or water leaks

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第6题

[单选题] We should often （）the bow and stern of a ship.

A、inspects B、inspecting C、inspect D、inspected

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第7题

[单选题] Once a vessel has loaded packaged hazardous cargo，the cargo spaces shall be inspected. The spaces shall also be inspected at least once in every 24 hours. The only exception to daily inspection is when（）.

A、a vessel is equipped with an automatic smoke or fire detecting system B、the cargo hatches are of steel construction C、the cargo is of a nonflammable type D、there is sufficient fire protection located on the main deck adjacent to the cargo hatch

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第8题

[单选题] A ship crane which has been idle for a period of over six months shall be inspected to the same standards as a（）.

A、yearly inspection B、quarterly inspection C、monthly inspection D、weekly inspection

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第9题

[单选题] 进行安全检查。（）

A、Carry out safety inspection. B、Carry out more detailed inspection. C、Carry out important inspection. D、Carry out relevant inspection.

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第10题

[] A ship crane which has been idle for a period of over six months shall be inspected to the same standards as a（）.

A、A.yearly inspection B、B.quarterly inspection C、C.monthly inspection D、D.weekly inspection