- Assembly drawing is usually drawn after all the parts to which it belongs have been drawn.
- When dimensioning of metric thread, the extension line should be drawn from major diameter
- The horizontal projection of point A in space is represented by a
- The square is used to make horizontal line
- The intersection line of the three-dimensional plane of the plane is a plane polygon
- If a circle with a diameter of 40 is drawn at a 1:5 scale, the drawing diameter is （）
- Which two views should follow the projection rule of width equality?
- The symbol that represents thickness in dimensioning is ( )
- A stud has two ends, they are nut end and metal end
- The factors that affect the shape of the intersecting line are as follows: the shape, size and mutual position of the two-dimensional
- Horizontal projection reflects a straight line of true length, which must be a horizontal line.
- The V projection of two points can reflect the relationship between the upper and lower sides of the space and the left and right sides of the point.
- All the special points on the intercepting line must be made, including the point of curve property, the point of determining the range, and the dividing point.
- The coordinates of point A are (35, 20, 15), then the distance between the point and the W plane is 35
- The intersecting line of the two cylinders is a plane curve.
- The overall size of the part needs to be marked under any circumstances
- If a circle of 20 is drawn at a 1:2 scale, the drawing diameter is 40
- The intersecting line is the common cable between the intersecting plane and the three-dimensional surface.
- The parallelogram is parallel to the projection plane, and its projection on the projection plane accumulates into a line.
- The projection law between the three views is as follows:
- The coordinates of point A are (15, 25, 55), then the distance between the point and the H plane is ( )
- The size of the A3 drawing format specified in the national standard is
- The code name for the pipe thread is ( )
- Which of the following linear expressions is used for thread termination lines?
- If a circle of 80 is drawn at a 1:2 scale, the drawing diameter is ( )
- The elevation view reflects the length and height of the object, and the back view reflects the length and width of the object.
- Closeness refers to the fact that the shape of the intersecting line of the plane is a closed polygons.
- The title block usually lies in the right corner of drawing sheet
- If the two straight lines in space are parallel to each other, their projections on the same plane must be parallel to each other
- Tolerances indicate the range within which dimensions are allowed to change and must be positive number.
- If the thread number n=1, then pitch and lead are equal.
- The coordinates of the point determine the distance from the point to the projection plane, where the X coordinate represents the distance from the point to the W plane.
- The center line shall be 3-5 mm above the contour line.
- Space 2: a (10, 12, 20), B (10, 30, 20), indicating that point A is right behind point B.
- The horizontal plane projection of the horizontal line reflects the true length.
- The three-axis angle of the orthographic projection is 60 °.
- The size and digital direction specified in the national standard is ( )
- In circular view, the notch of screw head should be drawn with an inclind angle of ( )
- The projection of a straight line on a parallel projection plane is
- What kind of projection is the most commonly used in mechanical engineering
- The angles that cannot be drawn with a T-ruler and triangulation are ( )
- Intersection lines may have ( ) pairs of projections intersecting
- The spatial position of the point can be determined by how many projections of the point?
- The tolerance of 132 ±0.0125 is
- 5:1 is ( ) scale
- If a circle with a diameter of 10 is drawn at 2 ：1 scale, the drawing diameter is（）
- The contents of assembly drawings
- Overall dimensions show the ( ) of the composite solid
- Necessary dimensions include:
- When two part's surface contacting, there had better be only one pair of contact surfaces in the same direction
- Technical requirements on a detail drawing include surface texture, dimension tolerance, geometrical tolerance, heat treatment and surface treatment, machining and inspection, and other special requirements
- Inside the block,you should sign your name and object name
- A group of views:
- What is the unit in Ra6.3?
- we can find the material from title block
- What is the most commonly used evaluation parameter of surface roughness
- What principle does one should follow in set position of a part?
- What is the fit of H7/f6?
- When represent a shaft, the non-circular view should be chosen as main view
- The dimension chain should be closed
- How much is the upper deviation of h6
- In hole based system of fit, what is the basic devitaion symmbol of the hole
- The upper deviation is : maximum size-basic size and the lower deviation is : minimum size-basic size
- When draw internal thread, major diameter is drawn as thin line , minor one is drawn as thick line in non circular view.
- Keyway inside a wheel is normally through
- what does M, Tr, R mean respectively in thread marks?
- In screw joint, the end line should be drawn at the position of
- what does the 6 mean in symbol of washer GB/T 97.1-2002 6
- The addendum circle is larger than pitch circle, and the dedendum circle is the smallest one
- In stud joint, the length ,Bm of metal end depends on material connected.
- Whe two adjacent part are cut, the hatching direction shall be reverese.
- What is the diameter relationship between hole and bolt?
- What does LH mean in thread marks?
- In the symbol of key 16X100 GB/T 1096-2003, what does 100 mean?
- When a cutting plane pass through symmetric position of a rib, there should be no hatching on the area of the rib.
- When a cutting plane pass through the symmetric position, the labeling location symbols can be omitted.
- An object be represented as local section in the condition that both the outside and inside are complex, and its structure is not symmetry
- The arrow head can be omitted when the cut structure is symmetry,
- Superposition cut is represented as thick line and is put inside the original view
- The position of labeling the name letters for a sectional view should be above its view
- when several parallel cutting planes are used to cut, there will be a bold line at the corner of turning point.
- How much is the inclined angle of hatching for the commonly used metallic material
- The cut is represented only on the croosection, but the section is represented for all the visible outlines
- When a inclined cutting plane is used, the inclined sectional view can be rotated at an angle of less than 45°.
- is the dashed line necessary in isometric projection?
- The three types of dimension include shape dimension, location dimension and overall dimension
- The overall length is necessary for a round end plate.
- What are the regulations of three views? main view and left view : ; main view and top view: ; top and left view: .
- How much is the axes angle of isometric projection
- longer dimension should be outside of short ones.
- What type of intersection line can you get, when a sphere cut by a plane?
- How many types of parallel line are there relative to projection plane?
- How can you represent V projection of a point?
- Two lines are parallel in space provided that their respective projections on two projection planes are parallel.
- Which projection is the true length for a frontal line?
- Which projection accumulates as a point for a H perpendicular line?
- How many relationships between two lines?
- The true length projection of a line appears in a projection plane that is parallel to the line
- If two projections of two lines are parallel, then the two lines are parallel in space
- Which coordinates are related to H projection of a point?
- If a line is parallel to any line in a plane, the line is parallel to the plane.
- Thick dashed line shown can be made surface-treatment
- The "R" and "∅ " means radius and diameter.
- A compass is used to draw circles and arcs
- The possible direction of a dimension text should towards?
- What does a thick line represent in drawing?
- Continuous thin irregular line to indicate part sectional boundary lines or to terminate a part view, and for short break line.
- Thin dashed dotted line to indicate axis line ,symmetrical center lines.
- The elements of the dimension
- The main contents of title block are:
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