Cadd Knowledge Questions

Question 1

How many sides does a pentagon have?

Answer 1

Five.

Question 2

How many sides does a hexagon have?

Answer 2

Six.

Question 3

How many sides does an octagon have?

Answer 3

Eight.

Question 4

What is the most accurate method of drawing an ellipse?

Answer 4

The concentric-circle method.

Question 5

What does a unit on the mechanical engineer’s scale represent?

Answer 5

An Inch.

Question 6

What does a unit on the architect’s scale represent?

Answer 6

A foot.

Question 7

If you were told to make a quarter size drawing of a machine part, what drafting scale might you use?

Answer 7

Mechanical engineer’s scale.

Question 8

If you were told to make a quarter size drawing of a 1/64 reduction of a contstruction detail, what drafting scale might you use?

Answer 8

Architect’s Scale.

Question 9

If you were told to make a quarter size drawing of a chart of a survey, what drafting scale might you use?

Answer 9

Chain Scales

Question 10

How would you indicate on an engineering drawing a scale of 3 inches to 1 foot?

Answer 10

1/4

Question 11

How would you indicate on an architectural drawing 3 inches to 1 foot?

Answer 11

3”= 1’-0

Question 12

Why is it useful to remember that he slide rule is based on the principle of proportion?

Answer 12

If you remember that a slide rule is based on the principle of proportion , you will find it easier ot keep from being confused concerning which scale to use in locating the answer to a problem.

Question 13

Which scales on the slide rule are used in multiplying , dividing, and in solving problems of proportion?

Answer 13

The C and D scales

Question 14

Orthographic projection is a means for showing what relationship?

Answer 14

Orthographic projection is a means for shoing the relationship of all sides of an object.

Question 15

What are the lines called which are drawn to carry over dimensions from view to view?

Answer 15

Construction lines

Question 16

How are extension lines used?

Answer 16

Extension lines are used to extend the dimensions beyond the outline of a view so that they can be read easily.

Question 17

How are center lines used on a drawing?

Answer 17

center lines are used to indicate the center of a symmetrical object and the center of a circle or arc.

Question 18

is it permissible to substitute a visible line of the drawing for an extension line?

Answer 18

It should be avoided , if possible.

Question 19

What are leaders used for?

Answer 19

Leaders are used to connect numbers, references, or notes to the appropriate surface on the drawing.

Question 20

What are break lines used for?

Answer 20

Breaklines are used to save space where an extended part of an object has the same continuous shape and size.

Question 21

What do cutting plane lines indicate?

Answer 21

Cutting plane lines indicate the plan or planes in which a sectional view is taken

Question 22

How are viewing plane lines used?

Answer 22

Viewing plane lines are used to indicate the plane or planes from which a surface or several surfaces are viewed.

Question 23

Describe the two systems of dimensioning.

Answer 23

In the rectangular system , horizontal or vertical dimension lines are drawn parallel to the distance to be dimensioned and any necessary extension lines are drawn perpendicular to it. In the angular system, the position of a point , line, or surface is shown by means of angles and linear dimensions at an angle other than 90 degrees.

Question 24

In dimensioning angles, how are the dimension lines drawn?

Answer 24

As arcs.

Question 25

What do tolerance figures represent?

Answer 25

The amount a part can be allowed to vary from a dimension when the part is made.

Question 26

What does an auxilary view show?

Answer 26

An auxilary view shows some feature on the object which is not parallel with any of the three principal plans of projection.

Question 27

What does a detail view show?

Answer 27

A detail view shows a part of the drawing in the same plane and same arrangement but in greater detail and to a larger scale than in the principal view.

Question 28

When are sectional views used?

Answer 28

Sectional views are used when the interior construction or hidden features of an object cannot be shown clearly by outside views.

Question 29

What is a full sectional view?

Answer 29

A full sectional view is one where the cutting plane extends entirely across the object.

Question 30

What is a half sectional view?

Answer 30

A half sectional view is one wher e the cutting plan extends only halfway across the object as if a quarter of the object had been cut out.

Question 31

A map is drawn to a scale of 1”=30’. The type of scale that would indicate the distances on this map without further conversion is a(n)..

A.)Engineer’s Scale
B.) Architect’s Scale
C.) Surveyor’s Scale
D.) Yard Stick

Answer 31

A.) Engineer’s Scale

Question 32

A map is drawn to a scale of 1” = 2000’.
If 1 acre equals 43,560 square feet, then a 10 inch diameter circle on the map represents an area of MOST NEARLY _____ acres.

A.)564
B.) 3604
C.) 4326
D.) 7208

Answer 32

D.) 7208

Question 33

A plan is drawn to scale of 3/8” = 1’-0”. A line 2 1/2” long on the plan represents a distance of MOST NEARLY ____ feet.

A.) 9.21
B.) 8.00
C.) 7.33
D.) 6.67

Answer 33

D.)6.67

Question 34

On a topographic map, a contour line is a line joining the points of EQUAL…

A.)Temperature
B.)Distance
C.)Pressure
D.)Elevation

Answer 34

D.) Elevation

Question 35

The distance on a survey line between station 107+21.2 and 3+72.8 is MOST NEARLY ____ feet.

A.)7093.4
B.)10347.4
C.)10348.4
D.)10783.9

Answer 35

C.)10348.4