1Surface finish can be measured in:
Microinches
2Surface finish can be checked with a:
Comparison chart
3The depth of a 3/8-inch diameter counterbore can best be measured with a:
Depth micrometer
4Productions parts are considered rejected when:
Dimensions are out of tolerance
The width of a milled slot, hole diameter or counterbore depth can best be
5measured with a/an:
Dial caliper
Which of the following criteria determines the choice of a measuring
6instrument when checking a dimension?
The tolerance of the dimension being inspected
The process of checking and adjusting a measuring instrument to an
7acceptable standard is called:
Calibration
The dimension of a hole is stated as 9/16 ± 1/64 inches. Which of the
8following statements is true if a 0.584-inch diameter pin slips into the hole?
The hole is oversize
Which of the following measuring instruments can measure both the depth
9and diameter of a counterbore?
Dial caliper
Which of the following describes the safest procedure for measuring a part
10on the milling machine?
Stop the machine, deburr, brush chips clear, check the dimension
11Which of the following instruments is used for precision layout?
Dial indicator height gage and scriber attachment
12The included angle on the point of a general purpose drill is:
118°
Identify the appropriate drilling operation for cutting a recess for a socket
13head cap screw:
Counterboring
Identify the appropriate drilling operation for cutting a recess for a flat head
15Which of the following is the most common drilling practice?
Drilling holes
To prevent large burrs and a tendency for the drill to grab, a machinist
16should ________ the spindle pressure when breaking through the material.
Decrease
Two advantages of drilling on a milling machine
17instead of drill press?
The mill is capable of greater accuracy and The mill has greater rigidity
18Which of the following best describes the procedure for drilling a hole?
Layout, prick punch, center drill, drill, countersink
Identify the center finding device used to line up a center or prick punched
19hole?
Cone pointed edge finder
The most commonly used holding device for a drill applied on a vertical mill
21Which metal removal variable has the greatest affect on tool life?
Cutting speed (SFM)
22The cutting speed (in surface feet per minute) is determined by:
The type of material being machined
The correct RPM for a 0.750 diameter high speed steel end mill machining
23O1 tool steel at 50 sfm is:
266.7 RPM
A right-hand end mill rotates __________ in the spindle and ___________
24when viewed from the front end (cutting edges).
Clockwise, counterclockwise
25Feed rates for milling operations are expressed as _________________.
Feet per minute
Calculate the feed in inches per minute for O1 tool steel with a cutting speed
of 55 SFM. The HSS end mill has a diameter of 0.875 inches with four
26flutes. The chip load per tooth is 0.008 inches.
8.05 IPM
A CNC milling machine uses a feed rate given in inches per revolution
(IPR). What is the feed in inches per revolution for a four fluted end mill
27with a recommended chip load per tooth of 0.014 inches?
0.056 IPR
Changing the spindle RPM on a vertical milling machine with a belt and
pulley drive differs from changing the spindle RPM on a machine with a
28variable speed drive because the:
Variable speed drive must be adjusted while the machine is running
while the belt and pulley drive requires adjustment while the machine is
stopped
Removing any part of the Fire Triangle extinguishes the fire. The three
29components of the Fire Triangle are:
Spontaneous combustion
Which of the following statements is not considered a safe practice when
30operating a vertical milling machine?
Oxygen, fuel, heat
Handling solvents, lubricants and cleaning fluids properly maintains a safe
31work area. A document used as a reference for handling these materials is
Climb milling on a mill without backlash control
If solid material becomes lodged in the eye, the first step for proper first aid
32is to:
d
Which of the following is considered a safe practice for a milling cutter or
33face mill when approaching the workpiece?
c
34What is the first aid procedure for control bleeding for a minor cut?
b
The tap drill for a 3/8-16 UNC internal thread is ______ inches in diameter
35and provides a _______ thread engagement.
d
36The optimum thread percentage that most tap drill charts are based on is:
b
37The type of tap that is best suited for finish tapping a blind hole is a:
a
What is the proper procedure for tapping under power on a vertical milling
39The best cutting fluid for tapping aluminum is:
b
40The best cutting fluid for tapping gray cast iron is:
a
41Name the three types of taps found in a tap set:
c
42Which of the following statements will not prevent tap breakage?
b
43What is the correct tap drill for a 3/4-14 NPT (pipe thread)?
c
44Which of the following types of end mills is capable of plunge cutting a hole?
d
The hand dial found on the table of a vertical milling machine has a
45resolution of:
e
An edge finder has a tip diameter of 0.200 inches. What distance must the
table move to align the center of the edge finder to the edge of the
47The table of a vertical milling machine rests on the:
b
Which of the following is the best example for milling a 0.375-inch slot on a
48vertical milling machine?
c
To accurately align a vise mounted on a table of a vertical milling machine
49perpendicular to the column, the vise should be aligned with:
d
The most commonly used workholding device on the vertical milling
50machine is a:
c
To ensure even seating and to combat any tipping action caused by the
51moveable jaw, the best practice is to:
b
When using hold down clamps to clamp work on the milling machine, the
52best setup that provides even clamping pressure is to:
b
The X-axis on a vertical mill represents ______________ table movement.
The Y-axis on a vertical mill represents ________________ table
movement. The Z-axis represents _______________ movement of the
53spindle.
b
To tram the head of a vertical mill properly, the spindle (or Z-axis) must be
55Which of the following is not a function of layout lines?
e
A shaft has a two-inch diameter. The milling cutter has a diameter of 0.250
inches. The machinist has touched off at the side (not the top) of the shaft
and has raised the milling cutter to clear the part. How far must the table be
56moved to center the milling cutter over the shaft?
d
To bore a hole perpendicular to the face of the workpiece, the machine table
57should be _____________ to the spindle.
b
Which of the following tools is the most accurate tool for making the
58preparatory setup for milling an angle on a workpiece?
What effect will a very small primary clearance angle have on the cutting
59action of a milling cutter?
What type of spindle taper is most commonly found on a Bridgeport milling
60machine for hold collets?
To remove a collet from the spindle of a vertical milling machine, the
62Which of the following vertical milling machine components is labeled as 1?
63Which of the following vertical milling machine components is labeled as 5?
64Which of the following vertical milling machine components is labeled as 9?
65Which of the following vertical milling machine components is labeled as 7?
66Which of the following vertical milling machine components is labeled as 12?
67Which of the following vertical milling machine components is labeled as 11?
To bore a hole perpendicular to the face of the workpiece, the machine table
should be _____________ to the spindle.