Question 1

The smaller of two spur gears is a ____________________.

Accepted Answer

pinion

Question 2

A spur gear with a rack converts ____________________ motion to reciprocating or linear motion.

Accepted Answer

rotary

Question 3

The thickness of a tooth or space measured on the circumference of the pitch diameter is ___________________________________.

Accepted Answer

chordal thickness

Question 4

The diameter of an imaginary circle on which the gear tooth is designed is the ____.

Accepted Answer

The pitch diameter is the imaginary circle on which the gear tooth is designed. It is the diameter that is used in calculating the gear ratio and in determining the tooth size and spacing. The diametral pitch is the number of teeth per inch of pitch diameter. The root diameter is the smallest diameter of the gear at the bottom of the tooth spaces. The circular pitch is the distance between corresponding points on adjacent teeth measured along the pitch circle.

Question 5

Bevel gears connect shafts having intersecting axes.

Accepted Answer

Bevel gears have teeth that are angled and connect shafts that have intersecting axes.

Question 6

The diameter at the bottom of the tooth is the inside diameter.

Accepted Answer

The diameter at the bottom of the tooth refers to the root diameter, not the inside diameter. The inside diameter typically refers to the innermost diameter of a hollow object, which is not applicable in the context of tooth dimensions in gears or similar applications.

Question 7

The distance from a point on one gear tooth to a corresponding point on the adjacent tooth measured on the circumference of the pitch diameter is the ____.

Accepted Answer

The distance from a point on one gear tooth to a corresponding point on the adjacent tooth measured on the circumference of the pitch diameter is known as the circular pitch.

Question 8

The overall gear diameter is the outside diameter.

Accepted Answer

The overall gear diameter is the diameter of the gear at its widest point, which is the outside diameter.

Question 9

The function of a gear is to transmit rotary or _________________________ motion from one machine part to another.

Accepted Answer

The answer of The function of a gear is to...

Question 10

The pressure angle on spur gears is 14.5° or 30°.

Accepted Answer

The standard pressure angles for spur gears are typically 14.5°, 20°, and sometimes 25°, but not 30°.

Question 11

The radial distance between the bottom of one tooth and the top of the mating tooth is the ____.

Accepted Answer

The clearance is the radial distance between the bottom of one tooth and the top of the mating tooth, which allows for proper engagement and prevents interference between the teeth. The addendum is the radial distance from the pitch circle to the top of the tooth, the dedendum is the radial distance from the pitch circle to the bottom of the tooth, and the whole depth is the sum of the addendum and dedendum.

Question 12

The formula for diametral pitch is ____.

Accepted Answer

The answer of The formula for diametral pitch is ____.
...

Question 13

Gears are often used to change the speed of a shaft.

Accepted Answer

Gears are commonly used to change the speed of a shaft. This is achieved by using gears of different sizes or by meshing gears with different numbers of teeth.

Question 14

Spur gears connect ____ shafts.

Accepted Answer

Spur gears are designed to interlock and rotate parallel to each other, which allows for efficient transfer of power and torque between parallel shafts. A and D are incorrect because spur gears cannot connect perpendicular or intersecting shafts. B is also not correct because non-intersecting shafts do not provide a clear indication of the angle between the shafts.

Question 15

The overall height of the tooth is the ______________________________.

Accepted Answer

The answer of The overall height of the tooth is...

Quiz 32: Spur Gears