竖直地埋管换热器的敷设要求是( )。A.埋管深度宜大于30m,钻孔孔径不宜小于

题库2022-08-02  32

问题 竖直地埋管换热器的敷设要求是(  )。A.埋管深度宜大于30m,钻孔孔径不宜小于0.11m,间距宜为3~6mB.埋管深度宜大于30m,钻孔孔径不宜小于0.11m,间距宜为5~8mC.埋管深度宜大于20m,钻孔孔径不宜小于0.11m,间距宜为3~6mD.埋管深度宜大于20m,钻孔孔径不宜小于0.15m,间距宜为4~7m

选项 A.埋管深度宜大于30m,钻孔孔径不宜小于0.11m,间距宜为3~6m
B.埋管深度宜大于30m,钻孔孔径不宜小于0.11m,间距宜为5~8m
C.埋管深度宜大于20m,钻孔孔径不宜小于0.11m,间距宜为3~6m
D.埋管深度宜大于20m,钻孔孔径不宜小于0.15m,间距宜为4~7m

答案 C

解析
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