单项选择题
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1.将所有处理空气的设备都设置在一个空调机房内,空气加热.加湿用的冷源和热源由专用的冷冻站或锅炉房供给。此类空调系统适用于大型空调系统,该系统为( )空调系统。
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A.集中式
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B.局部式
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C.混合式
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D.分散式
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2.黑色金属管中,主要用于给水.排水和输送煤气等的管道为( )。
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A.无缝钢管
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B.焊接钢管
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C.铸铁管
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D.镀锌钢管
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3.并联运行的电力电缆敷设时,应满足一般规定的是( )。
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A.弯曲半径相等
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B.长度相等
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C.绝缘材料相同
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D.外径尺寸相等
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4.配水支管上每一直管段.相邻两喷头之间的管段上设置的吊架均不宜少于( )个,当喷头之间距离小于1.8m时,可隔段设置吊架,但吊架的间距不宜大于3.6m。
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A.1
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B.2
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C.3
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D.4
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5.粒径小于101um的尘粒能长期飘在空气中,称为( )
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A.浮尘
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B.飘尘
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C.灰尘
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D.降尘
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6.目前在大多数空调工程中,风管与风管之间.风管与部件及配件之间的连接,主要采用( )
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A.吸口连接
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B.法兰连接
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C.铆接
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D.焊接
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7.某施工机械预计使用8年,耐用总台班数为2000台班,使用期内有3个大修周期,一次大修修理费为4500元,则台班大修修理费为( )元。
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A.6.75
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B.4.50
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C.0.84
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D.0.56
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8.减压阀直径按( )计算。
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A.低压侧
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B.中压侧
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C.高压侧
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D.超高压侧
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9.适用于潮湿.有机械外力,有轻微腐蚀气体场所的明.暗线配管的管子应为( )
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A.电线管
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B.硬塑料管
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C.焊接钢管
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D.半硬塑料管
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10.某工程第一年购买钢材的价格是3000元/吨,第二年是3800元/吨,第三年是4200元/吨,则钢材的环比价格指数依次为( )。
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A.26.7%,10.5%
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B.78.9%,90.5%
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C.126.7%,140.0%
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D.126.7%,110.5%
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答案:1.A 2.C 3.B 4.A 5.B 6.B 7.B 8.C 9.C 10.D
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