第一章 单元测试
1、多选题：
According to national standard, which of the following are preferred scales?
选项：
A:4：1
B:2：1
C:3：1
D:5：1
答案: 【2：1;5：1】
2、多选题：
Which of the following lettering heights are provided in national standards?
选项：
A:10
B:5
C:7
D:3
答案: 【10;5;7】
3、判断题：
The symbol “GB/T 14689-2008” denotes that the concern national standard is compulsory.
选项：
A:对
B:错
答案: 【错】
4、判断题：
When we make a drawing, a frame should be drawn inside of the outmost edges of the drawing sheet. There are two styles of drawing sheet layout: with a filling margin and without a filling margin.
选项：
A:对
B:错
答案: 【对】
5、单选题：
Which of the following lines are used as dimension lines, extension lines, leader lines, construction lines, section lines and projection lines?
选项：
A:Thin solid lines
B:Wavy lines
C:Thin phantom lines
D:Thin center lines
答案: 【Thin solid lines】
第二章 单元测试
1、多选题：
Which of the following are the projection rules of the projections of points？
选项：
A:The horizontal projection and the profile projection of the same point have the same width coordinate.
B:The frontal projection and the horizontal projection of the same point should be aligned vertically.
C:The frontal projection and the profile projection of the same point should be aligned horizontally.
答案: 【The horizontal projection and the profile projection of the same point have the same width coordinate.;The frontal projection and the horizontal projection of the same point should be aligned vertically.;The frontal projection and the profile projection of the same point should be aligned horizontally.】
2、多选题：
What are the projection properties of frontal line?
选项：
A:The horizontal projection is parallel to axis OX.
B:The angle between the frontal projection and axis OX equals the angle of the spacial line and the horizontal plane of projection.
C:The frontal projection gives the true size.
D:The profile projection is parallel to axis OZ.
答案: 【The horizontal projection is parallel to axis OX.;The angle between the frontal projection and axis OX equals the angle of the spacial line and the horizontal plane of projection.;The frontal projection gives the true size.;The profile projection is parallel to axis OZ.】
3、判断题：
If a line is an oblique line, the projections of the line will be foreshortened lines in the three planes of projections.
选项：
A:对
B:错
答案: 【对】
4、判断题：
The connecting line between the spacial point and its horizontal projection reflects the distance of the point to the horizontal plane of projection, and it equals the coordinate X of the point.
选项：
A:错
B:对
答案: 【错】
5、判断题：
According to the difference of X coordinates of the two points, we can tell the relative position of these two points in front-rear direction.
选项：
A:错
B:对
答案: 【错】
第三章 单元测试
1、多选题：
Which of the solid can we make straight lines on its surfaces?
选项：
A:
Cylinder
B:
Cone
C:
Sphere
D:
Pyramid
E:
Prism
答案:
2、多选题：
When we need to make a point on the surface of a solid, on which of the following solid the auxiliary latitude circle method can be used?
选项：
A:Prism
B:Cone
C:Pyramid
D:Sphere
答案:
3、判断题：
When making projections of points in the conical surfaces of cones and spherical surfaces on spheres, auxiliary element method and auxiliary latitude circle method can both be used.
选项：
A:错
B:对
答案:
4、判断题：
When a sphere is cut by a plane at any location, all of the projections of the produced intersection are circles.
选项：
A:错
B:对
答案:
5、判断题：
When dimensioning a composite solid which is formed by cutting, the dimensions should be given at the location where the solid is cut.
选项：
A:对
B:错
答案:
第四章 单元测试
1、判断题：
When the views of a composite solid formed by adding are drawn, the solid can be considered as formed by small features, and then the views of the features are drawn one by one. In the process of drawing views of the features, we should keep in mind that the composite solid is a whole solid.
选项：
A:对
B:错
答案:
2、判断题：
When the views of a composite solid formed by cutting are drawn, the solid can be considered as a extruding prism and then cut by different planes.
选项：
A:错
B:对
答案:
3、多选题：
Which of the usages of center lines in views are correct?
选项：
A:
Show the projection of symmetric plane of a solid in a certain direction
B:Express crossed center lines of circular projections
C:Express axis of solids of revolution.
D:Express invisible outlines
答案:
4、单选题：
The isometric projection of a frontal circle is an ellipse. The minor axis of the ellipse is in coincidence with , and the major axis of the ellipse is perpendicular to .
选项：
A:axis Y1,axis X1
B:axis Z1,axis Z1
C:axis X1,axis X1
D:axis Y1,axis Y1
答案:
5、单选题：
The isometric projection of a profile circle is an ellipse. The minor axis of the ellipse is in coincidence with , and the major axis of the ellipse is perpendicular to .
选项：
A:axis X1,axis X1
B:axis Y1,axis Y1
C:axis X1,axis Z1
D:axis Z1,axis Z1
答案:
第五章 单元测试
1、多选题：
What representation methods are included in the method ‘view’,that is, non-sectioned view?
选项：
A:Inclined view
B:Partial view
C:Principle view
D:Referrence arrow view
答案:
2、多选题：
According to the cutting range, sectinal views include .
选项：
A:Full sectional view
B:Offset section
C:Half sectional view
D:Broken-out section
答案:
3、多选题：
According to the different structures of the machine parts, different types of cutting surfaces can be used. The cutting surfaces include .
选项：
A:Single cutting plane
B:Single cylindrical surface
C:Several parallel cutting planes
D:Several intersecting cutting planes
答案:
4、多选题：
Choose the properties of the general section line from the following description.
选项：
A:Having the same interval
B:Thin solid line
C:45°or 135°about horizontal line
D:Parallel to each other
答案:
5、判断题：
In occasions of representing a relatively complex part, three standard views are not enough to show all the details of the part clearly and completely.
选项：
A:对
B:错
答案:
第六章 单元测试
1、单选题：
Which screw thread term is the nominal diameter?
选项：
A:Major diameter
B:Minor diameter
C:Pitch diameter
D:Crest
答案:
2、多选题：
Which options belong to the five important screw thread elements?
选项：
A:Tread form
B:Thread number
C:Major diameter, pitch diameter and minor diameter
D:Turning direction
E:Pitch and lead
答案:
3、多选题：
In the following options, are standard parts.
选项：
A:Springs
B:Keys
C:Gears
D:Commonly used thread fasteners
答案:
4、单选题：
Which option is the type symbol for pipe threads?
选项：
A:Rc
B:G
C:M
D:Tr
答案:
5、单选题：
Which surface is working surface of square and rectangular key joint?
选项：
A:Upper surface
B:End surface
C:Lower surface
D:Side surface
答案:
第七章 单元测试
1、单选题：
In dimension φ60f7 in a detail drawing, φ60 is , f is , 7 is .
选项：
A:The nominal size of a revolved surface, the fundamental deviation symbol of an internal surface, the tolerance symbol.
B:The nominal size of a revolved surface, the fundamental deviation symbol of an internal surface, the IT grade.
C:The measured size of a revolved surface, the fundamental deviation symbol of an internal surface, the IT grade.
D:The nominal size of a revolved surface, the fundamental deviation symbol of an external surface, the IT grade.
答案:
2、多选题：
Which of the follow numbers are of Ra values?
选项：
A:6.4
B:12.5
C:6.3
D:3.2
E:12.8
答案:
3、判断题：
When a shaft is represented, the axis of it should be placed horizontally.
选项：
A:错
B:对
答案:
4、判断题：
The overall dimension of a part in a certain direction needs not to be given in condition that the dimensions of each portion have already been given.
选项：
A:错
B:对
答案:
5、判断题：
Tolerance is the difference between the permitted maximum and minimum sizes of a part. It also equals the difference between the upper limit deviation and the lower limit deviation.
选项：
A:对
B:错
答案:
第八章 单元测试
1、多选题：
What of the following are the contents of assembly drawings?
选项：
A:Technical requirements
B:All dimensions of the parts
C:Title block, part numbers and parts list
D:A group of views
答案:
2、多选题：
What of the following are indicated in assembly drawings?
选项：
A:Working principle of assembly
B:Assembling relationships of parts
C:Geometrical tolerances of parts
D:Surface roughnesses of parts
答案:
3、多选题：
What of the following are included in parts lists of assembly drawings?
选项：
A:Names of parts
B:The number of certain parts in an individual assembly
C:Materials of parts
D:Drawing scales
答案:
4、多选题：
What of the following are of the special representation methods of assembly drawing?
选项：
A:Draw a view of a certain part
B:Phantom representation
C:Virtual representation
D:Taking several parts apart
答案:
5、判断题：
The methods which can be used in representing machine parts, include regular views, sectional views, removed sections, and the like, which can also be used to represent assemblies.
选项：
A:错
B:对
答案:
第九章 单元测试
1、多选题：
In using AutoCAD software, the operation sequence of which of the following commands is start the command, select the objects, specify base point, specify second point.
选项：
A:Copy
B:Trim
C:Mirror
D:Move
答案:
2、判断题：
In using AutoCAD software, the command Trim can only be used to trim straight lines and arcs, whereas circles can not be trimed by the command Trim.
选项：
A:对
B:错
答案:
3、多选题：
In using AutoCAD software, the following descriptions are about the usages of the command Trim, which of them are correct?
选项：
A:We can trim several segments in one time conducting the Trim command.
B:We can trim only one segment in one time conducting the Trim command.
C:We can pick the boundaries one by one.
D:We can right click the mouse to select all the objects as boundaries.
答案:
4、单选题：
In using AutoCAD software, when we draw a rectangle, we should give two points in the rectangle. Which of the following description is correct about the two points?
选项：
A:The center point and an end point of a side.
B:The opposite two corner points.
C:The middle points of the opposite two sides.
D:Two end points of a side.
答案:
5、判断题：
In using AutoCAD software, when the command Mirror is used, the mirror line must be center lines.
选项：
A:错
B:对
答案:
请先 ！