Mechanical Drives 1 Part 3

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.

• A. Increase torque

• B. Change the direction of rotation

• C. Increase speed

• D. Decrease speed

The pitch of a gear is the distance between _____.

• A. The top point of each tooth to the corresponding point on the adjacent tooth

• B. The distance between two corresponding teeth located at the base of the teeth

• C. One point on a toot and the corresponding point on the next tooth measured along the pitch circle

• D. The angle of the teeth between the top of the teeth and the base

Pitch diameter is used to calculate _____.

• A. Gear ratio

• B. Speed

• C. Output power

• D. Power loss

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. 500

• B. 1000

• C. 1500

• D. 3000

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

• A. Parallel axis

• B. Intersecting axis

• C. Non-intersecting axis

• D. Moving axis

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

• A. Parallel axis

• B. Intersecting axis

• C. Non-intersecting axis

• D. Moving axis

One disadvantage of helical gears is _____.

• A. Excess noise

• B. Low efficiency

• C. Side thrust

• D. Excess weight

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

• A. Speed changer

• B. Speed increaser

• C. Torque converter

• D. Speed reducer

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

• A. Right-angle drive

• B. Compound drive

• C. Variable angle drive

• D. Co-axial drive

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

• A. Non-intersecting

• B. Parallel axis

• C. Moving axis

• D. Multi-axis