C) Through boring, counterboring and internal grooving
D) Through boring, facing and threading
75) A machine reamer finish can be improved by:
A) Boring with a finishing tool
B) Running a hand reamer through the bore
C) Leaving more material to remove when reaming
D) Running a rose reamer through the bore
76) What is the purpose of a thread relief groove for internal threading?
A) Stress relieve the part being threaded
B) To prevent breaking a tap
C) To provide a place for the tool to pass out of the thread
D) To take pressure off the cutting tool
77) Taps used for lathe tapping are:
A) Plug, bottoming and spiral point
B) National fine, National coarse and taper
C) Taper, plug and bottoming
D) Spiral, plug and taper
78) Parting tools can jam in the cut and break as a result of:
A) Cutting speed that is too high
B) The tool is set above center
C) Feed that is too light
D) Lack of cutting oil or too heavy feed
79) Some ways to prevent chatter when cutting off material with a parting tool are to use:
A) Diagonally ground parting tools, use heavy power feed and a high speed
B) A heavy feed, low speed and cut off the material near the chuck or near the tailstock center
C) Coolant, feed in very slowly and use very high speed
D) A light hand feed, low speed that makes a chip, low speed, cutting oil and a rigid setup
80) Ordinary knurls make a pattern on the workpiece by:
A) Displacing the material
B) Compressing the material
C) Cutting the material
D) All of the above
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81) Three reasons knurling is done on workpieces are:
A) For tool handles, to resist corrosion and for appearance
B) To cover up errors be increasing the diameter of a part, for tool handles and press fits
C) For press fits, appearance and a gripping surface
D) None of the above
82) The sharp V thread:
A) Has an included angle of 55 degrees
B) Does not fit or seal as close as most threads
C) Is seldom used today
D) Is very durable and will take much abuse without damage
83) The pitch of the thread is the:
A) Helix angle
B) Distance between a point on a screw thread to a corresponding point on the next thread
C) Distance a nut will travel in one revolution on a two lead screw thread
D) Same as the number of threads per inch
84) The unified thread form:
A) Is the same thread form as the American Standard form
B) Is the same general form as as a metric thread
C) Has a 60-degree included angle
D) Has the same classes of fits as other forms
85) One reason for having thread tolerances and classes of fits is:
A) So specific threads can be properly labeled
B) That better finishes can be obtained
C) The percent of thread can be more easily determined
D) To insure interchangeability of threaded parts
86) Threads are cut or chased on the lathe with a single point tool by:
A) Using a threading die
B) Setting the correct feeds on the quick-change gear box
C) Moving the carriage by means of the rack that is located under the front way
D) Making a series of cuts in the same groove
87) Sixty-degree thread cutting is best done with the compound set at 29 degrees because:
A) It will swing out of the way to make the crossfeed micrometer dial more visible
B) Threads can be cut more quickly than with a straight infeed
C) It provides a cleaner cutting action
D) Most of the cutting is done on the trailing edge of the tool as it is fed in, but the compound is
brought back to zero at the end of each cut causing some cutting on the leading edge on the next
pass
88) Threading tools are checked for accuracy on the 60-degree angle by using a:
A) Center gage
B) Thread gage
C) Tool angle gage
D) Screw pitch gage
89) The tool is aligned with the work:
A) By squaring the tool on the face of the workpiece
B) With a center gage
C) With a small square
D) With a thread gage
90) The number of threads per inch can be checked with a:
A) Screw pitch gage
B) Tool gage
C) Metric rule by counting
D) Ring gage
91) When threading, the carriage is moved along the ways by:
A) The feed rod spine or keyway
B) A gear train on a rack
C) The hand wheel
D) The lead screw
92) The half-nut should be engaged when threading odd numbered threads when the threading
dial is positioned at:
A) Opposite line only
B) Only one line
C) Any numbered line
D) Any line
93) For threading, the spindle should be turning:
A) At the slowest speed the lathe can be set
B) At about one-fourth normal turning speeds
C) At the RPM given in standard charts for the type of metal you are working on
D) None of the above
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94) Left-hand threads are cut by:
A) Using a standard tool and setting the compound 29.5 degrees to the left of the operator
B) Turning the tool upside down, reversing the rotation of the spindle and moving the tool from
left to right
C) Using a left-hand threading die as these threads cannot be made on an ordinary lathe
D) Making a right-hand thread and turning it end for end
95) The thread is picked up when a threading tool is removed for grinding by:
A) Replacing the tool in the holder and repositioning the tool by moving the compound and cross
feed screws
B) Replacing the tool in the holder, engaging the half-nut and repositioning the tool with the
compound and cross feed
C) Replacing the tool in the holder and proceeding with threading
D) None of the above
96) Internal threads that are cut with a single point tool should have a bore size equal to:
A) The minor diameter of the external thread
B) The minor diameter of the internal thread
C) P × .541 inch
D) D = major D – 2 × basic thread height × percent of thread
97) To insure concentricity for a single point internal threading operation:
A) Ream the hole to make it round
B) Drill slightly under the required ID
C) Center the work in a four jaw chuck
D) Bore the hole to the correct size
98) Large internal threads are often made on the lathe with single point tools because:
A) It is faster than tapping
B) It is the only way the thread can be produced
C) Cleaner, smoother threads are produced
D) Various thread forms can be made and they are concentric to the axis of the work
99) For cutting internal right-hand threads, the compound rest should be swiveled to:
A) The right 29 degrees
B) 90 degrees
C) The right 60 degrees
D) The left 29 degrees
100) Which of the following would be best suited for measuring the fit of an internal thread?
A) Rule
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B) Screw pitch gage
C) Tap
D) Screw plug gage or mating part
101) Deflection of the boring bar causes:
A) An oversized thread
B) A tapered thread
C) Chatter or a possible undersized thread
D) None of the above
102) What other names are used for slight tapers and for steep tapers when they are used for
machining parts?
A) Draw bolt tapers and Brown and Sharp tapers
B) Self-holding tapers and quick release tapers
C) Log tapers and short tapers
D) Sticking tapers and releasing tapers
103) In what ways are taper dimensions expressed?
A) By included angles and by degrees and minutes
B) In millimeters per foot and in radians
C) By measuring the offset of the tailstock and by measuring the length of the taper
D) In degrees and minutes or by taper per inch or taper per foot
104) How can tapers be turned on a lathe?
A) By the off-hand method, the taper slide method and the tapered tool method
B) By the angular slide attachment, the offset center and the single tool
C) With the compound, taper attachment, offset tailstock and tool methods
D) None of the above
105) A finished tapered workpiece has an included angle of 70 degrees. If the taper is made with
the compound, how many degrees should be the setting be on the swivel base?
A) 70
B) 35
C) 20
D) 140
106) If the compound swivel base is set at 60 degrees at the lathe center line index, how many
degrees will the reading be at the crossslide index?
A) 150
B) 45
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C) 90
D) 30
107) The formula for calculating the tailstock offset is: Offset = L × (D – d)/2 × L1 where L is
the total length of the piece and L1 is the length of the taper. D is the large diameter and d is the
small diameter. If a shaft, that is to be tapered on one end , is 8 inches long and the taper is to be
3 inches in length, the shaft diameter is 1-1/4 inches and the small end of the taper is 1 inch
diameter, the offset should be:
A) 2.3 (.666) in.
B) .250 inch
C) .100 inch
D) 1/3 (.333) inch
108) How can the tailstock be measured for offset?
A) With a dial indicator, a rule, a toolholder and micrometer dial
B) With a micrometer caliper or an offset gage
C) With a special gaging fixture
D) By using a rule to measure the distance between dead centers and ways
109) The two types of taper attachments are the:
A) Ordinary and sliding
B) Plain and telescoping
C) Common and collapsing
D) Standard and interlocking
110) Tapers may be measured when the work is in the lathe by using:
A) A rule and micrometer caliper
B) A taper plug or ring gage
C) A taper micrometer
D) All of the above
111) The end or edge of a tool may be set up with a protractor to cut a taper. What kinds of
tapers may be made by this method?
A) Short and slight angles
B) Any angle and moderately long
C) Long and slight angles
D) Very short, at any angle
112) A steady rest should be used to:
A) Support workpieces that extend three diameters from the chuck
B) Support long shafts that are being threaded full length
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C) Hold the tool steady so that it won’t chatter
D) Support long shafts
113) The follower rest is used for:
A) Resting the tool so that it will not cause the work to chatter and for supporting the tool for
extra heavy cuts
B) Supporting long and springy work by following the tool
C) Turning workpieces without a center and thus reducing friction. Higher speeds can be used
D) Supporting long and springy work and supporting long work for internal machining
114) A steady rest may be set up properly by using a dial indicator near the steady rest on a
rotating shaft.
115) When a shaft has centers, the steady rest is set up:
A) By turning the shaft and checking for run out with a dial indicator. The jaws are set
accordingly
B) With the shaft between centers, the top jaw is brought down to touch the shaft, then adjust the
other two jaws
C) Turning workpieces without a center and thus reducing friction. Higher speeds can be used
D) By adjusting the lower jaws finger tight to the shaft while the dead center is in the shaft center
hole, then adjust the top jaw
116) You can prevent a finished shaft from being damaged by the steady rest jaws by:
A) Wrapping the shaft with abrasive cloth, abrasive side to the shaft, and by using high pressure
lubricant
B) Using hardened steel jaws, oiled and adjusted frequently
C) Readjusting the top jaw when the shaft heats and expands and by using high pressure
lubricant and protective material on the jaws
D) Keeping them good and tight and using a light oil
117) You can set up a steady rest when the shaft has no center by:
A) Placing a punch mark in the center of the shaft and measuring to the steady rest frame with a
steel rule. Adjust jaws to center the mark
B) Holding the workpiece in a three jaw chuck
C) Holding the workpiece in a four jaw chuck
D) Placing a punch mark in the center of the shaft and adjusting the steady rest jaws to align the
punch mark to the tailstock center
118) What is the correct procedure for using the steady rest when the workpiece is rough?
A) Leave the jaws somewhat loose
B) Turn a smooth bearing surface on the workpiece
C) Use lots of oil
D) Turn the work slowly
119) A square shaft can be turned in a steady rest by:
A) Bending a piece of heavy shim stock around where the jaws contact the workpiece
B) Using a lathe dog
C) Using an external cat head
D) Using an internal cat head
120) A long, slender shaft must be turned and threaded with an acme thread. It is too springy to
machine without support. What can be used to back up the tool?
A) Follower rest
B) Compound rest
C) Tool rest
D) Steady rest
121) The follower rest jaws can be made to clear the dead center or tailstock spindle when the
tool is returned to the start of the cut by:
A) Making the shaft two inches longer
B) Moving the jaws to the left of the tool
C) Making the shaft longer and undercutting the end
D) Readjusting the the jaws outward and back in each pass
122) Five thread forms used on translating screws are:
A) Buttress, modified square, square, Acme, and stub Acme
B) Modified square, square, Acme, American National standard and Acme
C) Square, stub Acme, Acme , Unified and Buttress
D) Acme, Buttress, Whitworth, square and modified square
123) Translating type screws are used:
A) In translating machines
B) As a fastener to connect to dissimilar materials together
C) For imparting motion to a mechanical part
D) Mostly for woodworking
124) The depth of thread for a 1-1/2 – 5 square thread is:
A) .250 in.
B) .200 in.
C) .125 in
D) .100 in.
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125) The depth of thread in inches for a 1-1/2 – 5 general purpose Acme thread is:
A) .110 in.
B) .220 in.
C) .120 in.
D) .210 in.
126) General Purpose Acme threads:
A) Bear at the major diameter
B) Have the same clearance at the root and the flank
C) Generally have very poor finishes so fits are not important
D) Bear at the flanks
127) How many degrees is the included angle of general-purpose Acme threads?
A) 10
B) 14.5
C) 29
D) 60
128) Stub Acme threads are used:
A) On long screws for translating motion and power
B) Where a shallow depth with a coarse pitch is required
C) Where more strength is needed
D) For short length screws
129) How many degrees is the included angle of the modified square thread?
A) 60
B) 29
C) 14.5
D) 10
130) Which is the most commonly used and easiest to machine of the translating type threads?
A) Square
B) Modified square
C) Buttress
D) Acme
131) Buttress threads are used:
A) On special bolts used for the construction of dams and large buildings
B) To resist great forces that are exerted in one direction only
C) To translate motion
D) For positioning mechanical parts
132) The Acme threading tool forms an included angle of ________ degrees?
A) 30
B) 55
C) 60
D) 29
133) Care should be exercised when grinding and measuring the following on the Acme
threading tool. Which is correct?
A) Back rake, thread angle, and relief angles
B) Side rake, back rake and relief angle
C) Side rake, thread angle and relief angle
D) End flat width, relief angle and thread angle
134) Before cutting coarse threads, the operator should lubricate:
A) The lead screw and gear box
B) The carriage and half-nuts
C) The ways and cross slide
D) All of the above
135) In what position is the compound normally set for cutting right hand external Acme
threads?
A) 14.5 degrees to the right
B) 29 degrees to the right
C) Set at 90 degrees
D) 14.5 degrees to the left
136) The Acme tool is aligned to the work with:
A) A square
B) The Acme tool gage
C) The eye
D) A center gage
137) Very small internal Acme threads are made with:
A) Broaches
B) Special boring bars
C) Acme tap sets
D) None of the above
138) The fit is checked on an internal Acme thread with:
A) An Acme tool gage
B) A bore gage
C) A screw pitch gage
D) An Acme thread plug gage
139) Good finishes are obtained when cutting Acme threads by using rigid setups and:
A) Low speeds, light cuts and cutting oil
B) High speeds and heavy cuts
C) Soluble oil, water-based coolant
D) Tools with built up edges and low speeds with a good grade coolant