问答题简述变风量系统(Variable Air Volume VAV)

问答题
简述变风量系统(Variable Air Volume VAV)

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VAV系统末端装置比较常见的有()。A、普通型VAV末端装置B、专用型VAV末端装置C、再热型VAV末端装置D、风机型VAV末端装置

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名词解释题变风量系统

判断题夏季,采用变风量系统的美国建筑比中国建筑耗热量高,主要是因为美国变风量系统存在末端再热的现象。A对B错

单选题The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the().Aabsolute humidityBrelative humidityCspecific humidityDtotal humidity

单选题The() only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.Acentral air condition systemBhigh velocity systemClow velocity systemDsingle duct system

单选题In a naturally aspirated diesel engine, the volume of air intake is directly related to engine ().Acompression ratioBvalve sizeCfuel pressureDcylinder clearance volume

单选题In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because ().Athe beveled edges of the intake valves provide for serf-centering during seatingBintake valves utilize stellite-coated valve seat inserts which reduce wearCthe volume of air passing through intake valves is less than the volume of air passing through exhaust valvesDintake valves are less affected to the corrosive action of exhaust gases

多选题变风量未端系统的组成方式有()A单风管VAV系统B单风管加热VAV系统C单风管送回风机联为VAV系统D单风管旁通式VAV系统

单选题The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as().Aignition ratioBpower ratioCcompression ratioDinjection ratio

多选题VAV系统末端装置比较常见的有()。A普通型VAV末端装置B专用型VAV末端装置C再热型VAV末端装置D风机型VAV末端装置