【单选题】【消耗次数：1】
孔道较长的构件进行后张法施工，一般在两端张拉，其目的是（）。（第八章知识点15后张法施工工艺）
①
防止构件开裂
②
提高控制精度
③
减少伸长值检测误差
④
减少孔道摩擦损失
参考答案：
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相关题目
【单选题】
某构件采用机械张拉后张法施工，孔道长度为29.8m，预应力筋为单根粗钢筋，每根长8米，两端均用螺丝端杆锚具，则对焊接头数量为（）个。（第八章知识点11后张法）
①
3
②
4
③
5
④
6
【单选题】
预应力筋张拉时，应校核其伸长值，当实际伸长值比计算伸长值（），则应暂停张拉，查明原因并采取措施后方可继续张拉。（第八章知识点11后张法）
①
大于10%
②
小于5%
③
大于10%或小于5%
④
大于±5%
随机题目
【判断题】
mso-ascii-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
宋体;mso-bidi-font-family:Times New Romanmso-bidi-theme-font:minor-bidi;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">通过对组合体尺寸的分析，把组合体三视图尺寸分为定形尺寸、定位尺寸和总体尺寸
①
正确
②
错误
【判断题】
mso-bidi-font-family:Times New Romanmso-bidi-theme-font:minor-bidi;
background:white;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:
AR-SA">零件图视图数量及表达方法应根据零件的具体结构特点和复杂程度而定，表达的原则是：完整、简洁、清晰
①
正确
②
错误
【判断题】
mso-bidi-font-family:Times New Romanmso-bidi-theme-font:minor-bidi;
color:#333333;background:white;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA">零件图应通过剖视图和断面图表达内部结构，不应出现虚线
①
正确
②
错误
【单选题】
正投影法中，投影面、观察者、物体三者相对位置是( )
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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人——面——物
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
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mso-hansi-theme-font:minor-latin;
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物——人——面
③
Normal
0
7.8 磅
0
2
false
false
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EN-US
ZH-CN
X-NONE
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{mso-style-name:普通表格;
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mso-bidi-font-size:11.0pt;
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mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
C. 人——物——面
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
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mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
面——人——物
【单选题】
当直线、平面与投影面平行时，该投影面上的投影具有( )
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
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mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
积聚性
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
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mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
mso-hansi-theme-font:minor-latin;
mso-font-kerning:1.0pt;}
真实性
③
Normal
0
7.8 磅
0
2
false
false
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EN-US
ZH-CN
X-NONE
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类似收缩性
④
Normal
0
7.8 磅
0
2
false
false
false
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ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:普通表格;
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收缩性
【单选题】
mso-bidi-font-family:宋体;mso-font-kerning:0pt;mso-ansi-language:EN-US;
mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;mso-bidi-font-weight:bold">平行剖切面剖视图所用的剖切平面是
①
一个剖切平面
②
两个相交的剖切平面
③
两个剖切平面
④
几个平行的剖切平面