If the engine （） for a long period, there will be a danger o

SIB1消息的调度周期固定为『____』。(How long SIB1 message scheduling period is fixed to『____』.)

Excessive oil foaming in the crankcase of a refrigeration compressor is most likely to occur when the compressor

A.has run continuously for a long period

B.suction pressure is below normal

C.oil level is below normal

D.starts after a long idle period

A. are paid for

B. are called for

C. are cared for

D. are prepared for

How should you warm up a diesel engine that has not been run for some time?______.

A.Run it at minimum speed for a period of time

B.Run it at half speed for a period of time

C.Bring it to top speed immediately

D.Inject ether into the air intake

Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．

A.warm up the exhaust blower motor

B.provide a proper supply of fresh air for the engine（s）

C.see the system is in good operating condition

D.insure at least one complete change of air in the compartments concerned

The following statements concerning long-term debt are true except that ______.

A．long-term debt is a liability of a period longer than one year

B．long-term debts are paid in installments

C．despite of different payment plans, long-term debts are never classified as current liabilities

D．the loan borrowed by the company is a typical example of long-term debt

Please tell me ______ to reverse your engine from full ahead to full astern．

A.How length will it take

B.How long it will take

C.How long will it get

D.How much hours it will take

A、weigh

B、like

C、grow

D、increase

After being launched from a vessel, totally enclosed survival craft which have been afloat over a long period require ______.

A.frequent opening of hatches to permit entry of fresh air

B.regular checks of bilge levels

C.use of ear plugs to dampen engine noise

D.frequent flushing of the water spray system with fresh water