Bennett Mechanical Test Gears and Belt Drives 4

Question 1

Three gears mesh in a line: 20, 40, and 20 teeth. The overall ratio from first to last gear is:

Accepted Answer

1:1

Answer

1:4

Answer

4:1

Answer

1:2

Question 2

Increasing the number of teeth on the driven gear while keeping the driver fixed will:

Accepted Answer

Lower output speed

Answer

Raise output speed

Answer

Keep speed the same

Answer

Reverse direction

Question 3

Compared to a chain drive, a belt drive is generally:

Accepted Answer

Quieter but more prone to slipping

Answer

Louder and slip-free

Answer

Unable to transmit power

Answer

Always faster

Question 4

A motor spins at 1200 RPM driving a gear ratio of 4:1 reduction. The output speed is:

Accepted Answer

300 RPM

Answer

4800 RPM

Answer

1200 RPM

Answer

600 RPM

Question 5

What does a tensioner or jockey pulley do in a belt system?

Accepted Answer

Maintains proper belt tension

Answer

Increases gear teeth

Answer

Reverses the motor

Answer

Adds torque to the shaft

Question 6

If two gears must turn in the SAME direction without changing the ratio, you should add:

Accepted Answer

One idler gear

Answer

A larger driven gear

Answer

A worm gear

Answer

A second belt

Question 7

A larger pulley diameter on the driven side of a belt produces:

Accepted Answer

More torque, less speed

Answer

Less torque, more speed

Answer

No change at all

Answer

Belt reversal