Final Flashcards
1
Q
- In most hydroelectric developments the head and water flow will:
A
Fluctuate
2
Q
Intake design has a large effect on:
A
O velocity
O volume
O head
© all three
3
Q
A partially clogged trash rack will
A
cause a decrease in the effective head
4
Q
Wood stave pipe would probably not be used for
A
heads above 500 feet
5
Q
An open conduit system implies
A
the presence of a free surface
6
Q
The best canal cross-section from a hydraulic point of view is defined as
A
the one that has a minimum wetted Perimeter
7
Q
The least efficient type of high-line conduit is that type which
A
has the greatest effect on the available head
8
Q
One of the major advantages of using a pressure tunnel in a power conduit system is that
A
it permits full use of the available head
9
Q
Steel pipe is used more extensively than any other type of pipe for penstock construction
because
A
of the degree of flexibility it offers in satisfying design criteria in all of
the above areas
10
Q
Positive water-hammer pressure caused by a sudden decrease in the demand for water can be
eliminated by:
A
O a relief valve
O a pressure-regulator
O a surge tank
© any one of the above
11
Q
Negative water-hammer pressure is created by:
A
a sudden increase in the demand for water
12
Q
Which of the below conditions would probably not cause the water level in the riser of a
differential surge tank to fall?
A
a load rejection
13
Q
Pumped storage type of hydroelectric developments implies a capability for.
A
O improving load factors on inter-connected power system steam plants
O providing a wider range of power system reserve capacity
O improved peak load operation
© all of the above
14
Q
The best hydraulic rectangular cross-section occurs when : (b=bottom width, y=water depth)
A
y=b/2
15
Q
Penstock velocities may range from
A
6 to 20 ft/sec
16
Q
Which of the following factors affects the power transmitted by a belt?
A
Friction force applied by the belt and speed of the belt
17
Q
Generally, the pitch diameter of a V-belt sheave is ___ the outside diameter
A
Less than
18
Q
Among conventional V-belts, the narrowest is designated___ and the widest is designated____
A
A;E
19
Q
The advantage of using a group belt instead of multiple belts is that the group is
A
More uniform
20
Q
Because of their movable side flanges, spring-loaded adjustable sheaves require
A
Lubrication
21
Q
Among the advantages of chain drives over belt drives is the fact that chain drives
A
Are more efficient
22
Q
Roller chains include the following parts
A
roller links, pin links, rollers, bushings
23
Q
Offset roller chain differs from standard roller chain in that the sidebars are___ on one end of each link
A
Closer together
24
Q
A chain sprocket with a hub on both sides is a Type_____ sprocket. A sprocket with a hub on only one side is a Type_____sprocket.
A
C;B
25
When you install a roller chain, proper procedure includes
• installing the chain with tension on the driving side only
26
The working depth of a gear is the distance a gear tooth
extends into the space between the teeth of the mating gear
27
```
Calculate the diametral pitch of the gear described below
No. of Teeth
= 30
Addendum
= 0.3 in.
Outside Diameter = 15.0 in.
Dedendum
= 0.5 in.
Pitch Diameter
= 14.7 in.
```
2.04
28
The advantages of helical gears over spur gears include
smooth action
29
Herringbone gears differ from double-cut helical gears in that they (have)
no gap between the two sets of teeth
30
 The axial pitch of a worm gear is the linear distance
between the screw threads
31
The main purpose of a miter-gear box is to change the_____ Its gear ratio is typically about_____ to one
direction of motion; one
32
The main steps in installing a new foot-mounted gear drive include
aligning the equipment
33
The mechanical power of a gear drive is based on the_____ of the gear drive
speed and torque limit
34
The service factor for a gear drive depends in part on the
Duty cycle
35
In parallel-shaft gear drives, oil is commonly provided to the gears by means of
splash lubrication and pressurized feed
36
The most important factors in selecting an adjustable-speed drive include the unit's
maximum power, speed required, and speed range
37
As you force together the flanges on the input sheave of an adjustable-speed belt drive while it is running, the flanges on the output sheave move_____and the output shaft speed_____
farther apart; increases
38
An adjustable-speed drive can be controlled by a(n)
gear mechanism, electric motor, or pneumatic piston
39
The belts used in adjustable-speed drives resemble____ belts. In drives that use chain, the chain is similar to a_____chain
Timing; leaf
40
To align a new motor with an existing pump using the reverse indicator method, you mount the dial indicator(s) on the coupling flange(s) located on (the) ____shaft(s). Each dial indicator takes readings from the flange(s) mounted on (the)____shafts
both; opposite
41
When aligning three machines, you can align two of them to the third, unless doing so would
require
lowering one or both below the support base
42
To align a new motor with an existing pump using the face-rim indicator method, you mount the dial indicator(s) on the coupling flange(s) located on (the) _____shaft(s). Each dial indicator
takes readings from the flange(s) mounted on (the) . ______Shaft(s)
only one; opposite
43
When aligning two machines joined by a long shaft, you use_____ dial indicators, which you mount on (the)______
two; opposite coupling flanges
44
What are the advantages of laser alignment equipment over dial indicators?
Easier, faster, more accurate alignment
45
The two major classifications of jaw couplings are the_____jaw couplings
flexible and rigid
46
The advantages of a chain coupling include the fact that the chain
can be replaced without disconnecting the coupling hubs
47
If an overload occurs in a machine driven by a shear-pin coupling, the
Pins break
48
The special features of limited end-float couplings include the
Thrust plate
49
Spacer couplings provide certain advantages over ordinary couplings, including the fact that
they
simplify the process of disconnecting a driving shaft from the driven
shaft
50
The purposes of a clutch include
allowing one device to either be connected to another or to run
independently
51
When a friction clutch operates, a_____ forced the______
shifting device: plates together or apart
52
An overrunning Clutch is useful in equipment where the dniven machine might need to
run faster than the motor
53
An electric clutch should be used with a load that must
start and stop frequently
54
In a single-impeller fluid clutch, motion is directly transmitted from the drive shaft in which sequence?
Impeller, fluid, clutch housing
55
In a roller-type adjustable-speed drive, the rollers have a_______ shape. Changes in speed are accomplished by changing the_____of the rollers
conical; angle
Check the book
56
Which of the following can only be cut on a power hacksaw or horizontal bandsaw?
Round stock
57
The major advantage of a bandsaw over a hacksaw is that the bandsaw
Makes no wasted motion
58
When you install the band in a horizontal bandsaw the teeth must point
Downward and to the right
59
When you set up a light-duty horizontal bandsaw, how will you set the bandspeed?
Change the drive belt position
60
When preparing to make a cut with a horizontal bandsaw which of the following is the final step you will take?
Move the head control lever to RELEASE
61
If the vertical bandsaw you use requires solid one-piece guide inserts, you must select a pair of upper and lower inserts to match the
Width and thickness of the band
62
When you set the blade of a vertical bandsaw, make sure the teeth in your right hand point
Downward
63
When you approach the end of a cut made on the vertical bandsaw, you should
Reduce the feed pressure
64
Before you use the vertical bandsaw an essential safety requirement is to make sure that
All guards are in place
65
Alter you cut apart the band of a vertical bandsaw, how should you clean the band ends before rewelding them?
Sand them
66
Which of the following is a major feature of the sensitive drill press?
Its feed is directly under operator control
67
Before you change from one tapered-shank drill bit to another, make sure to
Clean the chips from the shank and spindle
68
Which type of drilling machine can be used for boring operations?
Radial drill
69
What is a good rule to follow in planning the order of machining steps?
Plan the order to include as few changes in setup as possible
70
When securing a workpiece on the drill press table before you tighten the vise jaws, you should
Tap the workpiece lightly to seat it
71
For holes over .5 in. in diameter, you should use either a______ or a_____
Gear-head drill press; radial drill
72
You must drill a 5 in. hole in a workpiece of hard cast iron (recommended cutting speed of 70 sfpm). What is a good, approximate spindle speed?
560 rpm
73
You back a large-diameter drill out of thick stock periodically and clear out chips to avoid
Breaking the drill
74
If your drill's cutting edge chips as you begin your project, the most likely cause is a(n)
Excessively high feed rate
75
When you counterbore a hole, you should use a boring bit with a pilot whose diameter is
The same as the existing hole
76
The most distinctive feature of a typical precision vise for shaping operations is its
Ability to tilt
77
Whenever you leave a horizontal shaper, even if the project you are working on is not completed, you must
Remove the cutting tool
78
To help ensure safe operation, which of the following should you do before you operate a shaper?
Set the transmission on the slowest speed
79
Which of the following must you do before mounting a workpiece in the shaper vise?
Indicate-in the vise or worktable
80
When you mount a block-shaped workpiece in a shaper vise, the last step in seating the workpiece is to
Tap the work lightly with a soft mallet
81
When preparing to use the shaper, which of the following should you do first?
Set the length of stroke
82
 Calculate the stroke-rate setting for a crank-type horizontal shaper, with a 5-in long workpiece of cold work tool steel (recommended cutting speed: 40 sfpm).
46.6 strokes per minute
83
What is the actual total overtravel made by the ram in one complete cycle of its stroke when the machine is set up according to recommended guidelines?
3/4 in
84
An absolutely essential safety precaution to use with shapers is to
Wear eye protection
85
Which of the following operations is especially well-suited for a horizontal shaper, and is usually not possible to do on any other machine?
Cutting a slot or keyway
86
All of the following can be finished with a surface grinder EXCEPT
The shoulders on a cylindrical workpiece
87
An essential requirement for beginning a grinding project is to
Allow enough surplus material for grinding
88
When you dress and true a grinding wheel, start by lowering the wheel so that the diamond lightly touches its
High point
89
When grinding a long, rectangular workpiece, your first step is to grind the
Basic flat surfaces
90
When setting up a workpiece on the surface grinder, which of the following procedures should you do LAST?
Turn on the coolant
91
What is the recommended allowance for finishing cuts in general-purpose grinding?
0.0005 to 0.001 in.
92
In order to hold a workpiece securely between centers on a cylindrical grinder, you must
Use pressure from the footstock
93
Which calculation will give you the approximate rotation speed (rpm) for a workpiece on a cylindrical grinder?
sfpm x 4 ÷ workpiece diameter
94
When the wheel is wider than the raised surface to be ground, the procedure to use is
Plunge grinding
95
One feature common to all types of horizontal boring mills is the
Headstock column
96
An optional component that enables you to bore from several different directions without changing the setup is the
Rotary table
97
An advantage of the stub boring bar over a line boring bar is that it
Decreases vibration
98
When using a light-weight boring bar, you need a cutter with a
Large back-rake angle and a large side-rake angle
99
When you use a dial indicator to measure alignment on finished surfaces, correct alignment is achieved when the dial reading
Remains constant
100
When you align a workpiece having a premachined hole, and using a dial indicator mounted in the spindle, what you are really checking for is
Concentricity
101
When setting up a line-boring operation, measurements are usually made from the layout lines to the
Boring bar
102
If you cannot withdraw the boring bar to check the bore diameter, you may need to use a(n)
Inside calipers
103
What tool is most practical to use when you must rough bore an especially long work area?
Multiple-point boring tool
104
Which operation on a boring mill requires the use of a power cross-slide tool head?
Facing
105
To achieve a cutting speed of 4500 sfpm with a 9-in. grinding wheel, the wheel must rotate at about
1900 rpm
| Book 328 4.44
106
A typical application for a dividing head is the milling of a
Gear
107
The index holes around the spindle of the dividing head are used in____indexing
Direct
108
If a dividing head has 24 holes around its spindle nose and you must cut four equally spaced notches in a workpiece, how far must you rotate the spindle between cut?
Six holes
109
If a dividing head has a 40:1 gear ratio, how many times must you turn the worm to move the spindle one quarter of a complete revolution?
10
110
How many crank turns are needed to index each of 12 equally spaced cuts on a workpiece? Use
the formula: T=40/N
3 1/3
111
Suppose indexing a workpiece requires 4 turns of the index crank. You will use a hole circle onthe index plate with how many holes?
20
112
On a dividing head with a 40:1 gear ratio, one turn of the index crank moves the spindle how many degrees?
9
113
For simple angular indexing on a 40:1 dividing head, you can use an index plate circle with how
many holes?
54
114
Compound indexing differs from simple indexing in that you
Turn the index plate itself
115
Differential indexing is similar to, but more accurate than,____indexing
Compound
116
What makes a universal dividing head different from a plain dividing head?
Its spindle nose can be swung up 90°
117
When you use a center in the dividing head spindle to hold a workpiece, you install the other
center in the
Footstock
118
When mounting work on the dividing head center, you assure a positive flow of power from the dividing head spindle to the workpiece by using a
Driver and milling machine dog
119
When using a chuck to hold a workpiece on the dividing head, you can give the workpiece extra support with a
Steady rest
120
If you straddle mill a hexagonal workpiece, how many times must you position the work?
Three
121
Why should you insert a cap into the opening of the dividing head spindle?
To keep chips out of the spindle
122
When using the direct indexing method, you should NOT
Count the zero hole
123
To use the plain indexing method, the worm and worm gearing in the dividing head must be
Engaged
124
When plain milling, which side of a hexagonal workpiece should you mill after taking the first cut?
The opposite side
125
The dividing head is useful for drilling holes
In a circle
126
Cutting the teeth in a spur gear is a type of____milling.
Form
127
To mill spur gears, you should use ______cutters
Special profile
128
Compute the outside diameter of a 30-tooth sour gear blank with a diametral pitch of SIx. USE the following formula
OD = N+2/DP
5.333in
129
Which of the following factors does NOT affect cutter selection for milling spur gears?
Whole tooth depth
130
Series of eight cutters each have been developed to cut gears with different numbers of teeth that have the same
Diametral pitch
131
To index the teeth of a large-diameter gear, use a
Rotary table
132
When measuring a newly cut gear over pins, you should use a
Micrometer
133
To check spur gear tooth thickness at the pitch circle, use a
Gear tooth vernier caliper
134
The distance between adjacent helices that are wound on a common cylinder is called the
Helix pitch
135
The lead of a helix is determined by the
milling machine lead
136
To mill a helix, you must use change gears to link the lead screw of the milling machine with the
Dividing head worm shaft
137
If the ratio of change gearing is 1:1 and the lead of the milling machine is 10 in., a helix milling would have a lead of
10in
138
How many change gears usually make up a set?
Four
139
In the change gear formula 40/ao × 240 , how many teeth will the two driving gears each have?
40 and 24
140
In order to reverse the direction of gear rotation so that you can mill either a right- or left-hand helix, use a(n)
Idler gear
141
When using simple angular indexing to mill 15 teeth into a cylindrical workpiece, how far aprt must you space each tooth?
24°
142
In order to obtain the proper helix angle when milling a helical workpiece, you must swivel the
Machine table
143
Which of the following factors is NOT important for you to know about a helical gear you are milling?
Where it will be used
144
When milling helical gear teeth, you should NOT draw the cutter back through the work after a cut is complete because
You could damage the gear tooth surface
145
The tooth dimensions of spur gears are described by circular pitch. What measurement do you use to describe helical gear teeth?
Normal diametral pitch
146
What function does a cam perform?
They change the direction of motion of machine parts
147
The follower in a nonpositive cam system would NOT be controlled by
A groove in the cam
148
The distance that one cam lobe moves the follower from its starting point as the cam rotates is the
Cam rise
149
The total distance that a lobe on a uniform-rise cam would move the follower if the lobe extended a full 360° is the
Can lead
150
When milling a plate cam, you need a dividing head and a
Vertical milling attachment
151
When milling plate cams, the dividing head spindle and the cutter CANNOT be
•In the horizontal plane
152
When milling a uniform-rise cam with a short lead, the angle at which you set the vertical milling attachment determines the correct setting for the
Dividing head spindle
153
On which side of the workpiece do you position the cutter when milling a short-lead cam?
Lower
154
If one lobe of uniform-rise cam covers 120° of the circumference and has a rise of 0.25 in., what is the cam lead?
0.75 in
155
When milling nonuniform-rise cams, you should use
The incremental-cut method
156
A universal horizontal milling machine differs from a plain horizontal milling machine in that it has
A table swivel
157
The spindle of a horizontal milling machine is on the
Column
158
On a horizontal milling machine, the table and saddle are supported by the
Knee
159
A vertical milling attachment is bolted directly to the milling machine's
Column
160
The purpose of a vertical milling attachment is to enable you to mount cutters
In a vertical position
161
A milling machine's spindle speed is always expressed in
Rpm
162
Cutter speed is the rate at which a particular tooth
Passes over the workpiece surface
163
In order to compute spindle speed, you must have the
O Conversion of feet to inches
O Cutter diameter
O Cutter speed
© All of the above
164
Round shafts to be milled are usually mounted in a(n)
V-block
165
The graduations on the swivel base of a milling machine vise allow you to
Accurately align the workpiece at any angle
166
A slab milling cutter is designed to make_____ cuts
Heavy
167
A right-hand helix means that the
Cutter teeth spiral to the right
168
A left-hand cut means that the
Feed is from left to right
169
A Style B arbor has a
Bearing sleeve
170
A Style B arbor is held in the spindle with a
Drawbar
171
You should never tighten the arbor nut unless the arbor support is in position because
The arbor can be sprung
172
According to the formula rpm = sfpm x 4. what would be the spindle speed in rpm if the cutter speed is 70 sfpm and the cutter diameter is 3 in ?
93.33rpm
173
Which of the following is NOT a factor in making a rough cut efficiently?
Length of workpiece
174
If you stop the automatic feed before a cut is finished, always
© Stop the cutter rotation
175
In order to increase surface quality on a finish slab milling cut, lower the feed rate and
Maintain the spindle speed
176
The first machining step in milling a T-slot is to mill
A slot or groove in the workpiece
177
In a horizontal setup, what kind of cutter is used to mill the vertical slot?
Side mill
178
To align the cutter exactly over the top of the intended slot, you must subtract half the cutter width from the
Distance between the slot's centerline and the workpiece edge
179
You can fit a T-slot cutter into the horizontal spindle by using a(n)
Adapter
180
When you are completing a T-slot with the T-slot cutter held in the horizontal spindle, you must
Set the workpiece on its side
181
To bevel the edge of a workpiece in a horizontal setup, what kind of cutter is used?
Single-angle mill
182
What kind of cutter is use to mill a slot in a vertical setup?
End mill
183
When milling a T-slot with a vertical setup as compared with a horizontal setup, you should use
the same T-slot cutter
184
To angle mill a workpiece in a vertical setup, what kind of cutter would you use?
End mill
185
The difference between milling a T-slot and milling a dovetail is the difference between the
Cutter shapes
186
In straddle milling, the distance between the cuts is controlled by the
Spacers between the cutters
187
In straddle milling, there must be adequate clearance between the workpiece and the
Spacers
188
The greatest advantage in a straddle milling is that you
Save time
189
In straddle milling, in order to balance the thrust load on the arbor, the half side milling cutters should have
Opposite helixes
190
The cutter used to mill an angled step must be wide enough to
Cut the wide end of the step
191
Which of the following is the most precise method of finding out how wide the end of an angled
step measures?
Trigonometry
192
When you select a cutter for an angled step, you should always select the smallest cutter that will cut the wide end of the step because it
Is less expensive
193
When milling a step on a workpiece that is mounted at an angle, you must advance the crossfeed an amount that is______
the desired width of the step (measured on the workpiece)
Less than
194
What kind of an arbor is used for shell end mill?
Type c
195
Why should a face mill be wider than the area to be cut?
To avoid surface lines
196
If you cut a keyseat for square key using an arbor-mounted side milling cutter, you will produce
Feathered ends on the keyseat
197
Woodruff keyseats and keys are
Standardized
198
The last two digits on a Woodruff number show the cutter diameter in
Eighths of an inch
199
What would you use to make a plunge cut?
Two-fluted end mill
200
A plunge cut allows you to use the cutter in the same way you would use a
Drill bit
201
The best way to mill squares on round work without using a dividing head is to use___milling
Straddle
202
To find out the largest square that can be cut from a rounded shaft, multiply the diameter by
.707
203
If the space between two straddle cutters is slightly too narrow, you can increase it by installing
Shims
204
The procedures for milling a tang are basically the same as the procedures for milling a
Square
205
A single flat surface on a round shaft is usually machined with a
Plain milling cutter
206
The jaws of a 3-jaw universal chuck close and open
In unison
207
The jaws of a 4-jaw independent chuck
O Are designed to grasp large or odd-shaped work
O Can be reversed
O Operate separately
© All of the above
208
The quickest and most convenient chuck to set up on a lathe is the
Three-jaw universal chuck
209
The size of a chuck is designated by its
Diameter
210
Before mounting a chuck, always place a board across the
Ways
211
When you install a chuck on the spindle, you should never use
Power from the lathe
212
A chuck-mounted workpiece must be centered, with the work axis parallel to the lathe's
Centerline
213
An exact reference for centering oddly shaped workpieces in a chuck is the
Dead center
214
The type of work that can be held in a collet chuck is limited to
Small diameter workpieces
215
A mandrel is mounted in the lathe
Between centers
216
Facing a workpiece gives it square ends and a
Reference surface
217
Which angle is the most important on a facing tool?
Side rake
218
When facing, you should set the tool on the workpiece's
Centerline
219
When facing a large area on a workpiece, use the
Automatic feed
220
The rough cut is intended to remove material from the workpiece
Quickly
221
The roughing cut should leave enough material for a
Finishing cut
222
A rough turning tool does NOT make a good
Finish cut
223
The proper use of cutting fluids allows you to increase
O Cutting speed
O Depth of cut
O Time savings
© All of the above
224
The characteristic that makes a finishing tool differ from a roughing tool is its
Rounded point
225
A trial finish cut is just like a trial rough cut except that you are looking primarily for
Surface finish quality
226
Boring a hole in a workpiece makes the hole larger and
Trues it
227
A bored hole and the circular path in which the tool or workpiece is rotating are always
Concentric
228
The end clearance on a boring tool bit prevents the
Heel from rubbing
229
Within practical limits, always use a boring bar with the
Largest diameter possible
230
When you bore a hole, you should offset the compound rest to an angle of _____degrees
60
231
The type of corner produced at the end of a bored hole is determined by the
Cutting tool profile
232
During boring operations, a chip buildup should be cleaned out.
Only when the lathe is completely stopped
233
Forming a recess at the top of an existing hole is called
Counterboring
234
The counterbore must be concentric with the
Bore
235
Counterboring procedures are the same as those for
Boring
236
Machining a recess between two sets of internal threads separates the threads and
Provides chip clearance
237
The diameter of a hole to be threaded must equal the thread's
Minor diameter
238
When threading a bored hole, be sure that you allow for
Tool clearance
239
A thread-cutting tool must be ground to the particular
Thread form
240
For right-hand thread cutting, the compound-rest must be rotated to the left____ degrees
29
241
How many different methods are there of boring a taper on a lathe?
Two
242
When you use the compound-rest method to bore a taper, you must rotate the compound to an angle equal to
One half the included angle
243
When using the compound-rest method for boring a taper, you must set the tool post and tool holder parallel to the
Compound rest centerline
244
Of all the methods available to machine a taper on a lathe, which of the following is the most accurate?
Taper-attachment method
245
The telescopic taper attachment differs from the plain taper attachment in which of the following ways?
A cross-feed screw telescopes internally
246
A faceplate provides a reference surface that is perpendicular to the lathe's
Spindle axis
247
When truing a faceplate, you should select a_____ tool
Broad-nosed
248
Large workpieces that pose mounting problems in a chuck can be mounted on a faceplate with
Faceplate jaws
249
Faceplate clamps are inserted into
The faceplate slots
250
To prevent a workpiece from shifting backwards on a faceplate, you should use a
Driver
251
Workpieces that cannot be held against the vertical surface of a faceplate should be mounted on
An angle plate
252
You can offset the weight of an angle plate by using a
Counterweight
253
Each half of the clamp on a V-block angle plate has
V-shaped jaws
254
A specialized mandrel for machining eccentric circular areas has more than one set of
Center holes
255
When you bore very large workpieces, such as motor housings, on lathe, you should mount
them
On the carriage
256
Always check the lathe bed to make sure it is
Level
257
You should always cut off bar stock for machining
Slightly longer than needed
324 1.15
258
Longer workpieces should be
Mounted between centers
259
When installing a faceplate
Screw it on by hand
260
Always select a lathe dog
Not larger than necessary to accept the workpiece
261
When facing, use a half center to
Allow clearance for the cutting tool
262
Be sure the tail of the lathe dog
Does not sit on the bottom of the faceplate
263
Make sure the cutting tool
Does not hang out excessively from the tool holder
264
The cutting speed and feed on a lathe should always be
O Calculated to obtain the best possible finish
O In accordance with published tables from manufacturers
O In balance
• All of the above
265
When moving the cutter into the workpiece during facing,
Be careful not to strike dead center
266
Always remember that your depth of cut will
Reduce the overall diameter by twice the amount of cut
267
Always use a right-hand tool when
Cutting right to left
268
Depending on the hand of cut, the cutting tool point should be____ degrees toward the headstock or tailstock.
4 to 5
269
In rough turning, the cutter point should positioned______ the centerline
5° above
270
With a constant depth of cut,
An increase in speed requires a decrease in feed
271
The most accurate way to test if adjustments are needed is
A trial cut
272
When reversing work end for end between centers,
Protect the machined surface from the lathe dog
273
Always take your finishing cut
In the same direction as the rough cut
274
When aligning the cutting tool for a finishing cut,
Set the cutting tool above the centerline of the work
275
A trial cut should be about
1/4 in
276
When a shoulder is to be turned close to the end of the workpiece, use a scale and
Hermaphrodite caliper to measure location
277
The bent leg of a hermaphrodite caliper is placed against the____ of the workpiece
Faced end
278
In order to lay off shoulder lengths more accurately when making more than one identical, use a
Parting tool
279
Filleted shoulders are turned with a_____
| cutting tool
Round nosed
280
Different size fillets are made by changing
The nose radius on the cutting
281
Square corners on a shoulder are needed when
Other machine parts will be mounted against them
282
Undercuts always ensure
Square corners
283
Knurling operations always
Deform the workpiece surface
284
A 21 pitch knurling tool will produce a(n)_____grade knurl.
Medium
285
On a finished work surface, filing is usually done to
Remove tool marks and other irregularities
286
The split nut assembly is used only when
Cutting threads
287
Never engage the split nut assembly
When another automatic feed mechanism is in operation
288
The distance from a point on one thread to the same point on the next thread parallel to the screw axis is the
Pitch
289
The distance which a point on one thread travels during one revolution of the screw is the
Lead
290
When threading long slender workpieces, they should always be
Supported with a follower or steady rest
291
American National thread angles are always
60°
292
When cutting American National threads, the compound rest should always be set at an angle of
29°
293
The part of a lathe which can perform the same functions as a thread stop is the
Micrometer collar
294
How many divisions are marked on a thread dial indicator?
8
295
In cutting a right hand thread, the cutting tool is always fed
From right to left
296
A ° in./ft. taper often used for twist drills, reamers, end mills, and lathe centers is the
Morse taper
297
A taper whose calculation depends on its assigned number in the form of a numerator over a constant denominator of 8, 10, or 2 is a(n)
Jarno taper
298
The basic formula for calculating a taper Is
Large diameter - small diameter/length
299
The taper turning method which requires work to be removed from the lathe for the setup is the______method
Tailstock setover
300
The amount of inward and outward feed on the lathe's compound rest when using the taper attachment is controlled by the
Guide bar
301
A plain taper attachment requires you to
Disconnect the crossfeed screw
302
The key to using the compound rest method for turning a taper is the fact that the compound rest
Swivels
303
When using the compound rest method for turning tapers, you will need to work with angular dimensions because
The base of the rest is graduated in degrees
304
When making cutting adjustments using the compound rest method, you must back the compound rest all the way out in order to
Use the hand cross feed controls
305
Along with using a series of trial cuts, the most accurate way to obtain angular settings for taper turning is the
Dial test indicator and vernier bevel protractor method
306
Straight turning is performed by machining a workpiece to the same diameter along the
Entire length of the workpiece
307
A groove or undercut at the diameter change to ensure grinding up to the square face of a large
diameter is a
Relief notch
308
The most common method for turning tapers larger than 3 in./ft is the_____ method
Compound rest
309
When facing a workpiece that is short, you should mount it
O In a chuck
O In a collet
O On a mandrel
© Any of the above
310
When facing work between centers, use a half-center in order to
Provide clearance for the cutting tool
311
To make sure that bored and counterbored holes are concentric
Always use the same lathe setup for both
312
Bore large and irregularly shaped workpieces in a
Horizontal boring mill
313
Which of the following methods can be used for boring tapers?
Compound rest method
314
The most accurate method for boring tapers on a lathe is the
Taper attachment method
315
The shape of screw threads cut on a lathe is determined by the
Profile of the cutting tool tip
316
The most common way to drill in a lathe is to mount the drill
In the tailstock quill
317
When drilling long holes or working with bulky or cumbersome workpieces, you should mount the drill
In the headstock
318
The most accurate way to drill in a lathe is
Drill stationary and workpiece stationary
323 2.09
319
The machine most often used for drilling jobs in which a high degree of accuracy is not needed is
Sensitive drill press
320
Use a radial drill press when the workpiece
Is too large or bulky for an upright drill press
321
The major difference between spot facing and counterboring is spot facing
Removes less metal
322
Boring is done in a drillpress by installing a boring bar in a
Boring head
323
Use drill jigs when
The same hole is to be repeated a number of times
324
Reaming can be done
O By hand
O In a drill press
O In a lathe
© All of the above
325
Honing is done with the use of
Very fine abrasive stones
326
Machining a groove in the surface of a flat piece of metal is an example of_____milling
Side
327
Machining angular, concave and convex cuts into metal workpieces are examples of _____ milling
Profile
328
Face milling cutters 6 in. or less in diameter are called
Shell end mills
329
Machining keyways for a standard Woodruff key is a common example of
Slotting
330
The primary advantage of shaping as opposed to milling is
O A shaper tool can get into places that a milling cutter cannot
O Single-pointed cutting tools are less costly than milling cutters
O The single-pointed cutting tool is easily made
© All of the above
331
The cutting action of a broaching machine is done by
Pushing or pulling horizontally
332
A slotting machine is actually the same thing as a(n)
Vertical shaper
333
The cutting teeth on a broach
Increase in height from the end entering to the end leaving the workpiece
334
Surface grinding is done in order to
O Produce extremely close tolerances
O Produce very fine finishes
O Remove metal that is too hard for normal machining
© All of the above
335
The main advantage of using a vertical grinding machine is that
A greater area can be done in less time
336
The accuracy required to hold close tolerances
O Affects the choice of machine
O Affects the function of the final workpiece
O Increases the skill involved in machining
© All of the above
337
Angular dimensions are measured in
Degrees and minutes
338
Care must be taken when working with angular tolerances because
The spread becomes larger as distance increases away from the center
339
In a unilateral system of specifying tolerances
Only a plus or a minus is given
340
Tolerance stackup must be calculated when working with
Multiple dimensions on one workpiece
341
A rough cut removes excess material and allows for
The finish cut
342
When taking a rough cut, you must take finishing operations into account, or
The finished workpiece may be undersized
343
During a finish cut,
A small amount of material is removed
344
The type of surface finish made by a machine tool is influenced by
O Feed marks left by the cutting tool
O The way chips are formed by the tool
O Vibration between the workpiece and the tool
© All of the above
345
A surface averaging instrument measures
Average roughness of surface texture
346
The ease with which metal can be removed from a workpiece is referred to as
Machinability
347
Brittle metals like cast iron form chips that are
Discontinuous
348
When selecting cutting fluids, you should always consider
O Amount of fluid
O Point of fluid application
O Type of fluid
© All of the above
349
Solid lubricants are mainly used on
Hacksaw and bandsaw blades
350
After a list of operations has been made for a specific job, the next step is to
Make the best operational sequence
351
A careful study and analysis of the total job is crucial to
Machining efficiency
352
For maximum working efficiency, always try to
Use the same machine for as many operations as possible
353
Specially designed fixtures and attachments can be justified when
O A fast wearing part is made on a regular basis
O Emergency parts must be made to keep a production line running
O Spare parts must be made for obsolete equipment
© All of the above
354
Always try to select a machine which is
Slightly oversized for the job
355
When choosing a machine for a given operation
O Make sure the machine has more than enough power to perform the job
O Stay away from the outer limits of a machine's capacity
O Use the machine designed for that specific operation
© All of the above
356
```
The head obtained by subtracting the
head loss from conveyance of the
water to the turbine by conduit,
through the turbine and back to the
river, subtracted from the gross head
is called
```
Effective head
357
A base-load plant is a plant without
pondage and where the full plant
discharge is the same as the flow of
the river. T/F
False
358
With a higher velocity, the cross-
section of a conduit or conductor can
be____for a given
quantity of flow.
Smaller
359
Open conduits constructed in natural
| ground are called
Canals
360
Small ice needles which form at the
bottom of fairly quiet, shallow bodies
of open water are called:
Anchor ice
361
An alternative to lining a canal for
| protection against erosion is to:
increase the cross-section of the
| canal
362
______ are used to
prevent excessive rise of the water at
any point in a hydraulic development.
Spillways
363
The minimum velocity of water in a
power canal to prevent the deposit of
silt is:
2 to 3 feet per second
364
The conduit between the turbines and
| the surge tank is called the:
Penstock
365
A riveted pipe produces a lower
hydraulic loss than a fabricated
welded pipe. T/F
False
366
To prevent negative pressure in a
penstock where pipe is being used
what is installed in the pipeline?
Air vents
367
What is meant by the term "wetted
| perimeter??
surface area that is in contact
| with the water
368
What type of turbine has variable
vane design and can be used for both
pumping and generating?
Deriaz
369
A surge tank is normally designed to
accommodate how much of the water
load rejected by the turbines?
All of the load rejection
370
The two types of surge tanks are:
Simple
| Differential
