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WorksheetsNIMS 3.6 - Review
Total questions: 19
Worksheet time: 3mins
A machining process that creates a flat spot on a rough surface is
countersinking
spotfacing
counterboring
chamfering
A machining process that creates an included "V" angle or taper in a hole is
countersinking
spotfacing
counterboring
spot drilling
Center drills are used to
slightly enlarge an existing hole
create a hole through a workpiece
create a starting spot for a hole
When drilling for a 1/4" reamer, the proper amount of material to leave for the reamer is
0.005"
0.010"
0.015"
0.025"
What is the series of the following thread: 3/4-10 UNC -3A?
3
A
UN
C
Most tap drill charts suggest a hole size that will produce about what percentage of thread depth?
60%
50%
80%
75%
Which tap is considered a general, all-purpose tap?
Bottoming tap
Plug tap
Taper tap
Spiral tap
What operation can create a very accurate hole size with a very good surface finish?
Coutnersinking
Chamfering
Drilling
Reaming
After drilling, and before tapping, a hole should be
reamed
countersunk.
counterbored.
spotfaced.
What type of tap pulls chips out of the hole being threaded?
Form tap
Hand tap
Spiral flute tap
Spiral point tap
How many turns of a die would be needed to cut an external 3/8-16 to a length of 7/8"?
13
13.5
14
14.5
A M8 x 1.25 hole is currently tapped to a depth of 6.5 mm. How many more turns of a tap are needed to reach a depth of 12 mm?
4.4
5.2
9.6
15
A counterbore pilot should be slightly larger than the existing hole.
True
False
Reamer RPM should be faster than drilling.
True
False
A 3/8" diameter hole should be drilled to tap a 3/8-16 thread.
True
False
To thread with a 3/8-16 die, the material diameter should be 3/8".
True
False
A form tap pulls chips out of the hole being tapped.
True
False
A die is used to create external threads.
True
False
The pitch of a M3 × .5 thread is 3 mm.
True
False
