Bennett Mechanical Test Gears and Belt Drives 5

Question 1

A gear train has ratios of 2:1 followed by 3:1. The overall reduction ratio is:

Accepted Answer

6:1

Answer

Stage ratios multiply, so 2 times 3 gives a 6:1 reduction.

Question 2

Backlash in a gear system refers to:

Accepted Answer

Play between meshing teeth

Answer

Backlash is the small clearance or play between meshed gear teeth.

Question 3

Which arrangement gives the GREATEST mechanical advantage for lifting a heavy load slowly?

Accepted Answer

Small driver into large driven gear

Answer

Driving a large gear with a small one maximizes torque for slow, heavy lifting.

Question 4

In a V-belt drive, the V shape primarily helps to:

Accepted Answer

Increase grip and reduce slipping

Answer

The wedge shape seats into the pulley groove, increasing friction and grip.

Question 5

A driver pulley turns at 600 RPM. With a 1:2 step-up to a smaller pulley, the driven speed is:

Accepted Answer

1200 RPM

Answer

A 1:2 step-up doubles the speed, giving 1200 RPM.

Bennett Mechanical Test Practice Test