Gear speed and ratio

What is the unit of angular velocity?

• km/h

• mm/s

• rad/s

• m/s

What is the formula for translational velocity?

• V = r+ω

• V = r/ω

• V = r.ω

• V = r-ω

According to the law of gearing, what will be the output angular velocity if the diameter of the output gear is higher than the input?

• Lower

• Cannot be determined

• Same

• Higher

What defines the gear train type?

• Torque

• Number of teeth

• Rotational speed

• Diameter

In a gear train, what is the gear ratio if the speed decreases while torque increases?

• R<1

• R=0

• R>1

• R=1

What must be the same for 2 gears that mesh each other?

• Number of teeth

• Diameter

• Module

• Torque

What are intermediate gears called?

• Idlers

• Boosters

• Drivers

• Speeders

What is the gear ratio of a simple gear train if the product of teeth or diameter of driving wheels is 144 and the product of teeth or diameter of driven wheels is 432?

• 2

• 1

• 3

• 0.5

What is the gear ratio of a compound gear train if the product of driven wheels speed is 112.5 and the product of driving wheels speed is 450?

• 0.25

• 2

• 0.5

• 1

What is the gear ratio of a worm gear if the number of screw thread is 3 and the number of teeth of the wheel gear is 12?

• 1

• 0.25

• 0.33

• 0.5