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烧毁热流密度 burnout heat flux
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考题
下列关于热阻式热流计的描述中哪项是错误的?( )A.其热流密度测量原理是傅里叶定律B.热流测头输出的热电势与通过热流侧头的热流密度成正比C.测量时热流探头应紧贴被测表面D.为提高测量精度,热流探头应尽量薄,热阻应大些A.B.C.D.
考题
单选题In order to maintain a constant outlet water temperature of 80-85℃ from the engine, a three-way valve is installed()A
at the jacket cooler outlet to control the flux through the engineB
at the jacket cooler outlet to control the flux through the coolerC
at the engine outlet to control the flux through the engineD
at the engine inlet to control the flux through the engine
考题
单选题板式换热器和管式换热器相比具有()、有效换热面积大、热阻小等特点。A
体积大、热流密度高B
体积小、热流密度高C
体积小、热流密度低D
体积大、热流密度低
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