Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.

[单选题]The alarm signal for engine room catching fire is a blast of random bell followed by____.A．two knocksB．three BlocksC．four knocksD．five knocks

[单选题]“Stand by an engine” means （）A . “prepare to stop the engine”B . “assemble an engine on its bedplate”C . “make an engine ready for starting”D . “dismantle an engine&rdquo

[单选题]“Stand by engine” means （）.A . prepare to stop the engineB . assemble an engine on its bedplateC . make an engine ready for startingD . make an engine run steadily

[单选题]"Stand by an engine" meansA．"prepare to stop the engine"B．"assemble an engine on its bedplate"C．"make an engine ready for starting"D．"dismantle an engine"

[单选题]"Scavenging" on a diesel engine means （）.A . injecting fuel oil into a cylinderB . removing exhaust gases from the cylinderC . forcing air into the cylinders under pressure after the exhaust valve has dosedD . a combination of all the above

[单选题]______means that a program written for one computer system can be compiled and run on another system with little or no modification．A．PortabilityB．ReliabilityC．AvailabilityD．ReusabilityA．B．C．D．

[单选题]B．y means of multiple pipeline to carry out multiple processing,this technologyiscalledA．Multiple pipelingB．Supe rpipelineC．SuperscalarD．Very long instruction word

[单选题]B．y means of multiple pipeline to carry out multiple processing, this technology is called(71).A．Multiple pipelingB．SuperpipelineC．SuperscalarD．Very long instruction word

[单选题]Before hydraulic starting of an engine on a covered lifeboat，what need NOT be checked?（）A . Fuel supply line valveB . Pressure registered on the accumulator gaugeC . Cold-spark voltage readings test lampD . Engine stop control

[单选题]The successful operation of any engine or machine and （） depend on effective lubrication.A . their no trouble periodB . their freely trouble periodC . its free trouble lifeD . its trouble-free life