Miter gears of the same size are used for _____.

B. Speed increases in straight shafts

When mounting right-angle bevel gears, the first gear _____.

A. Must be slip completely onto the shaft before the second can be mounted

B. Must be mounted simultaneously with the second gear

C. Must be completely secured to the shaft before mounting the second gear

D. Can be mounted without regard to the second gear

One of the features of a gear is the tooth profile, which is defined as the _____.

D. Shape made by the edge of the tooth

A. Surfaced area on top of the tooth

B. Line on the tooth edge which blends with the root

C. Surface area of the tooth which is below the pitch circle

A gear with a diametral pitch of 24 will mesh with _____.

C. Only a gear having a diameter pitch of 24

A. Any gear having a diametral pitch of a 24 or lower

B. Any gear having a diametral pitch of 24 or higher

D. Only gear having a diametral pitch greater than 24

Spalling on a gear is often indicated by _____.

A. Small shallow craters that may join with other craters

Excessive backlash might cause _____.

C. Heavy wear on gear teeth roots and rounded tooth tips

D. Heavy flakes of metal (spalling)

The diametral pitch can be determined by calculating the _____.

B. Number of teeth and pitch diameter

A. Number of teeth and tooth angle

C. Number of teeth and center distance

D. Center distance and pitch diameter

The ideal center distance between two gears is that distance which _____.

A. Causes the gears' pitch circles to be tangent to each other

C. Is the minimum distance that works

D. Is the maximum distance that works

When two gears' pitch circles are tangent, it _____.

A. Creates the ideal center distance

C. Is the minimum distance that works

D. Is the maximum distance that works

The actual backlash between two gears can be measured using which of following methods?

C. Direct dial indicator measurement

A. Tachometer reading at the center of each gear

B. Micrometer reading of gear teeth width

D. Spirit level reading between the gear centers

In a multiple gear drive an idler is used mainly to _____.

D. Increases spaces between shafts

A compound gear drive is a type of gear train that has _____.

B. Two or more gear mounted on one shaft

C. Gear with two or more diametral pitches

A reverted gear drive _____.

A. Creates a gear reduction between two shafts on the same axis

B. Reveres the direction of rotation between two shafts on the same axis

C. Increases shaft speed between two shaft on the same axis

D. Has two or more shafts not in the same axis

The concepts used to calculate speed and torque of multi-gear drives can also be applied to compound gear with which of the following changes?

D. Gear ratio of any gears mounted on the same shaft must be included in calculations

A. The compound gears will have no effect

B. Idler gears will cause a change in speed and torque

For adjacent shaft power transmission, the two shaft _____.

A. Must be at the same height and in the same axis

The major disadvantage of a solid coupling is they _____.

A. Do not allow for any misalignment

The major feature of a split sheeve coupling is _____.

D. Allows the coupling to be removed without moving the two shafts

C. Inexpensive when compared to solid sleeve couplings

B. Is not supported directly by any bearings

A. Is connected to a driver shaft by a flexible jaw coupling

C. Is designed to be moved or reversed in a multiple gear drive

D. Has only one bearing supports

Mechanical Drives 1 Part 3

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University

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Mechanical Drives 1 Part 3

34 questions

The purpose of the idler gear is to either _____ of the driven gear or transfer power to a location which is father from the driver shaft.

The pitch of a gear is the distance between _____.

Pitch diameter is used to calculate _____.

A gear drive has a 30-tooth driver gear connected to a 57-tooth idler gear. The idler gear is connected to a 15-tooth driven gear. If the driver gear is rotating at 500 rpm, the rotational speed of the driven gear will be _____ rpm.

A gear drive system using two spur gears connected by an idler gear is an example of _____ gear drive.

A rack and pinion drive is an example of a(n) _____ gear drive.

One disadvantage of helical gears is _____.

A _____ is sometimes called a reduction gearbox, or simply, gearbox

This type of gear drive has shafts whose axes lie at 90 degrees to one another.

Which of the following is classified as a right-angle drive?

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