Mechanical Drawing Board and CAD Techniques ©2010

Chapter 17: Cams and Gears

Practice Tests

1
In AutoCAD®, a(n) ____ array is one in which an object is copied into a specified number of rows and columns.
A)triangular
B)rectangular
C)circular
D)elliptical
E)pattern
2
In AutoCAD®, a(n) ____ array is one in which several copies of an object appear in a circular or partial circular pattern.
A)arc
B)loop
C)curved
D)circular
E)polar
3
Involute gears are interchangeable if they have the same diametral pitch, addendum, dedendum, and
A)pitch circle.
B)root circle.
C)base circle.
D)pressure angle.
E)outside circle.
4
The number of teeth on a gear per inch of pitch diameter is the
A)circular pitch.
B)pressure angle.
C)diametral pitch.
D)base circle diameter.
E)gear ratio.
5
Cams suitable for high-speed operation are ____ cams.
A)involute
B)cycloidal
C)slider
D)harmonic motion
E)offset plate
6
A gear that has a straight pitch line rather than a circular pitch line is a
A)rack.
B)pinion.
C)cam.
D)spur gear.
E)worm gear.
7
The motion a cam will produce through one revolution can be shown in a
A)spreadsheet.
B)displacement diagram.
C)graph.
D)grid.
E)displacement chart.
8
In AutoCAD®, the ____ command allows you to make curved lines more accurate at high zoom levels.
A)VPOINT
B)DIMEDIT
C)DVIEW
D)SPLINE
E)VIEWRES
9
When two bevel gears are used in combination, the smaller one is the
A)rack.
B)bevel gear.
C)pinion.
D)planetary gear.
E)worm
10
The two angles most commonly used on spur gears are 14½° and
A)20°.
B)30°.
C)45°.
D)60°.
E)75°.
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