Machine Tool Practices, 11e (Kibbe)
Section J – Vertical Milling Machines
1) A major component of the vertical milling machine is:
A) The gib adjustment
B) The tool head
C) The coolant pump
D) All of the above
2) The quill can be moved by:
A) The quill feed hand crank
B) The quill feed hand lever
C) The quill power feed
D) All of the above
3) The spindle speed range is changed from high to low with:
A) The quill feed hand wheel
B) The spindle stopped
C) The spindle motor running
D) None of the above
4) The spindle brake is used:
A) To change the spindle speed range
B) When engaging the power feed
C) When changing tools
D) All of the above
5) The quill lock is used to:
A) Change tools
B) Take up backlash
C) Provide rigidity when milling
D) None of the above
6) Loose machine slides:
A) Should be replaced
B) Are normal on older machines
C) Are tightened with gib adjustment screws
D) All of the above
7) The ram:
A) Holds the tool head
B) Can be moved
C) Gives added machining capacity
D) All of the above
8) On a variable speed drive:
A) The speed is changed automatically
B) Spindle speeds changes are done with the spindle running
C) The spindle is stopped for speed changes
D) None of the above
9) The clamping devices on the machine slides:
A) Should always be tight
B) Should be tightened except for the moving slide
C) Should be loose
D) None of the above
10) The saddle supports:
A) The table
B) The column
C) The knee
D) None of the above
11) End mills capable of making their own starting holes are called:
A) Center cutting end mills
B) Center drilled
C) Starting hole
D) Plunge cut
12) Fast helix end mills are used to machine:
A) Brass
B) Aluminuium
C) Cast iron
D) Hard steel
13) Carbide tipped end mills are used to machine:
A) Deep grooves
B) Very soft materials
C) Highly abrasive materials
D) All of the above
14) Which type of end mill would you use to remove a considerable amount of material?
A) Slow helix
B) Roughing
C) Regular helix
D) Fast helix
15) Milling cutters with carbide inserts are used to:
A) Machine most materials
B) Avoid re-sharpening
C) Remove material efficiently
D) All of the above
16) Corner rounding end mills are:
A) Are used to cut O-ring grooves
B) Used to cut ball crank handles for machine tools
C) Can be used as boring tools
D) Used to produce outside corner radiuses
17) Dovetails are milled with:
A) Dovetail cutters
B) Single angle milling cutters
C) Tapered end mills
D) Double angle milling cutters
18) Ball end mills are used:
A) In tracer milling
B) To form fillets
C) To mill round bottom grooves
D) All of the above
19) The best method of holding and driving an end mill is:
A) A solid holder
B) A Jacob’s chuck
C) A split collet
D) All of the above
20) Frequently changed cutting tools should be held:
A) With set screws
B) By the driving flats
C) In a tool stand
D) In a quick-change tool holder
21) A workpiece that is to be clamped to the machine table, can be aligned with the table axis by:
A) Indicating the side of the workpiece
B) Placing it against stops in the T-slots
C) Measuring from the edge of the table to the side of the work
D) All of the above
22) To align a vise on a machine table:
A) Indicate the solid jaw
B) Place the vise against stops in the table T-slots
C) Measure the vise jaw with a rule
D) Indicate the adjustable vise jaw
23) When is the tool head alignment checked with a dial indicator?
A) Once every day
B) Before any precise machining square to the table is performed
C) Before any machining takes place
D) When any tool changing takes place
24) Prior to indicating a tool head for squareness to the table, tighten:
A) The knee clamping screws
B) The table clamps
C) The saddle clamps
D) All of the above
25) To position the spindle axis precisely over a workpiece edge:
A) Move the table while observing the micrometer dials
B) Use an edge finder
C) Use a dial indicator and a precision parallel
D) All of the above
26) When an edge finder is used to align the spindle center line with a workpiece edge, the
spindle RPM should be:
A) 300
B) 500
C) 700
D) 900
27) When the tip moves on a .200– inch diameter edge finder, how far is the spindle center line
from the workpiece?
A) .100 in.
B) .200 in.
C) .300 in.
D) .400 in.
28) The machine spindle is centered over an existing hole in the workpiece with the aid of:
A) A precision rule
B) A dial indicator
C) An edge finder
D) All of the above
29) When aligning a work head, how much preload should be set into the indicator?
A) .015 in.
B) .030 in.
C) .045 in.
D) .005 in.
30) While aligning a work head, the head clamping bolts should be:
A) Exerting a slight drag
B) Loose
C) Tight
D) Removed
31) Lower cutting speeds are used when machining:
A) Tough materials
B) Hard materials
C) Abrasive materials
D) All of the above
32) High cutting speeds are used with:
A) Light cuts
B) Heavy cuts
C) Large diameter cutters
D) All of the above
33) What materials are generally cut dry, that is without cutting fluids?
A) Brass
B) Steel
C) Cast iron
D) Both A and C above
34) Cutting fluids:
A) Prolong tool life
B) Act as lubricants
C) Increase production
D) All of the above
35) On a setup that is not very rigid, use a:
A) Lower cutting speed
B) Higher cutting speed
C) Larger diameter cutter
D) Heavy feed
36) When cutting steel under normal conditions, the depth of cut for an end mill should be no
more than:
A) The diameter of the cutter
B) 1/4 of the cutter diameter
C) 1/2 of the cutter diameter
D) 2 times the cutter diameter
37) The effects of an excessive feed rate are:
A) Cutting edge chipping and possible broken cutters
B) Long lasting cutting edges
C) Rapid cutting– edge wear
D) Very good surface finish
38) The longest tool life can be obtained when using:
A) The correct coolant
B) A feed rate that is not too low
C) The right cutting speed
D) All of the above
39) What is the RPM for a 1/4 (.250) inch diameter, four flute end mill at a cutting seed of 200
SFPM?
A) 1200
B) 2200
C) 3200
D) 4200
40) What is the feed rate in IPM for a 1/2 inch diameter, two-flute end mill with a cutting speed
of 100 SFPM and a feed per tooth rate of .003 inch?
A) 1.6
B) 2.8
C) 3.8
D) 4.8
41) A precise square on the end of a shaft would beis best machined:
A) By accurately centering the cutter over the shaft
B) With a vertical shaping attachment
C) With a dividing head
D) All of the above
42) When milling a cavity:
A) The cutting pressure should be with the cutter rotation
B) The backlash in the table feed mechanism should be ignored
C) The cutting pressure should be against the cutter rotation
D) None of the above
43) Circular slots are best machined with:
A) The workpiece clamped to the table
B) Circular slot cutters
C) The aid of a rotary table
D) All of the above
44) When milling a key seat into a shaft:
A) The cutter should be sharp
B) The cutter has to be the correct size
C) The cutter needs to be centered over the shaft
D) All of the above
45) Angular cuts on workpieces can be made:
A) By tilting the work head
B) By tilting the workpiece
C) With the peripheral teeth of an end mill
D) All of the above
46) A right– angle milling attachment:
A) Can be used to cut slots at different angles
B) Makes possible the milling of internal slots
C) Is used in hard to reach places on a workpiece
D) All of the above
47) Holes can be drilled on a vertical milling machine by:
A) Raising the knee of the machine
B) Using the sensitive quill feed
C) Using the quill power feed
D) All of the above
48) How many thousandths of an inch of material should be left for a finishing cut, when
roughing out a cavity?
A) .010
B) .030
C) .060
D) .080
49) An adjustable boring head is used to machine:
A) Non– standard size holes
B) Internal grooves and recesses
C) Faces perpendicular to bored holes
D) All of the above
50) The cutting edge of the boring tool:
A) Must be in line with the axis of the tool slide
B) Can be at any angle to the axis of the tool slide
C) Must be at right angles to the axis of the tool slide
D) None of the above
51) The hole size obtained by boring is affected by:
A) The material being machined
B) The RPM of the cutting tool
C) The size of the boring bar
D) The depth of cut and the resulting deflection of the boring bar
52) On a direct reading boring head, an outward adjustment of.010 in. of the slide will increase
the bore diameter by:
A) .005 in.
B) .010 in.
C) .020 in.
D) .0025 in.
53) Vibrations in a boring operation can be:
A) ReducedStopped by increasing the feed rate
B) Caused by an unbalanced cutting tool
C) Caused by a long boring bar
D) All of the above
54) Rigidity in a boring operation is obtained by:
A) Decreasing the feed rate
B) Using a short, large– diameter boring tools
C) Increasing the cutting speed
D) All of the above
55) When the depth of a cut in a boring operations increases, the:
A) Tool will be deflected less
B) Surface finish will improve
C) Tool deflection will increase also
D) Tool deflection will not increase
56) A boring tool that is not centered over the hole being bored:
A) Will result in uncontrolled vibrations
B) Requires a variable feed rate
C) Causes more tool wear on one side
D) Will cause more bar deflection on the side with the heavier cut
57) A cutting speed for boring bar operations is affected by:
A) The rigidity of the setup
B) The kind of tool material used
C) The kind of work material machined
D) All of the above
58) Rapidly withdrawing a rotating boring bar immediately after the cut is completed, may:
A) Cause an undesirable surface finish in the bore I. D.
B) Cause dulling or possible breaking of the cutting tool
C) Leave helical tool marks in the work
D) All of the above