Deck 15: Hole Patterns and Revision Blocks

Question 1

A circle contains:

A)360 degrees
B)90 degrees
C)180 degrees
D)270 degrees

Answer 1

A

Question 2

Equal-sized holes that are unequally spaced on a bolt circle require:

A)A hole size dimension shown for each hole
B)An angular dimension, even for those shown to be vertically or horizontally in line with the center of the bolt hole circle
C)Angular dimensions for each hole that is not shown to be vertically or horizontally in line with the center of the bolt hole circle
D)Dimensioning that is no different than that for equally spaced hole

Answer 2

C

Question 3

In a bolt hole circle consisting of five equally spaced holes, the holes will be:

A)72 degrees apart
B)90 degrees apart
C)36 degrees apart
D)60 degrees apart

Answer 3

A

Question 4

A revision block should include:

A)A description of the change that was made
B)A revision number or letter
C)The date of the change
D)The name or initials of the person making the change
E)All of the above

Question 5

If four holes are equally spaced on a bolt circle, but two holes are different sizes than the other two:

A)They are dimensioned the same as a pattern that included holes that are of the same size
B)Additional dimensions and leader lines are required
C)This is not a good practice, and should not be specified

Question 6

For a bolt hole circle that is dimensioned using coordinate dimensions, the bolt circle diameter is dimensioned just the same as for bolt circles that do not show coordinate dimensions.

Question 7

Holes located on a bolt hole circle may be equally spaced from each other or unequally spaced

Question 8

If a drawing dimension is changed, but the print is not redrawn:

A)No special notation is required
B)A "Not to Scale" symbol should be shown for those dimensions that require them
C)Users will be confused, so this should never happen

Question 9

The place on a print where a revision was made may be indicated by a letter or number enclosed in a circle or triangle.

Question 10

Coordinate dimensions are used for bolt hole circles that will be produced on machines equipped with digital readouts.

Question 11

A bolt circle is usually dimensioned by specifying the diameter of the circle.