Auxiliary boilers are divided into several classifications, one of which is （）.

[名词解释] Sever对象

[单选题]Generating tubes in waste heat boilers are finned to （）.A . reduce gas flow turbulenceB . prevent exhaust gas corrosionC . increase the rate of combustionD . increase the rate of heat transfer

[单选题]The procedures recommended for auxiliary boilers having high salinity include （）.A . treating with oxygen scavengersB . securing the boiler and giving it a blowing downC . increasing the pHD . reducing the phosphate level

[单选题]If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.A . pushed aheadB . towed alongsideC

[名词解释] 简述SEVER对象的功能

[单选题]The water in an auxiliary boiler should be tested for chloride content to determine ( ).A．total dissolved solidsB．salt contaminationC．water harcnessD．chlorine contamination

[单选题]The auxiliary engine and a cgenerator can be connected with （）.A . camB . crossheadC . bulgeD . coupling

[单选题]When an auxiliary boiler is panting and emitting black smoke, you should （）.A . increase the fuel oil temperatureB . decrease the fuel oil temperatureC . decrease the fuel oil supply pressureD . increase the air supply

[单选题]The water in an operating auxiliary boiler should be tested for alkalinity and chloride content each（）.A . hourB . dayC . weekD . month

[单选题]The water in an auxiliary boiler should be tested for chloride content to determine （）.A . total dissolved solidsB . salt contaminationC . water hardnessD . chlorine contaminatio