WorksheetsGear Drives 1
Total questions: 10
Worksheet time: 3hrs 30mins
What characteristic(s) can a gear change in a gear drive?
Direction and speed of the rotary motion
Speed of the rotary motion only
Direction of the rotary motion only
Power transmitted
What is an idler gear used for?
Obtain a specific speed ratio in a gear train
Maintain the same direction of rotation between a driving and a driven gear
Prevent gear motion in one direction
Allow the meshing of teeth cut at different pressure angles
What is backlash in a gear drive?
The energy used to force the gear teeth to mesh
A hub on the back side of the gear teeth
The play between two meshed gear teeth
The parallel misalignment between two adjacent gears
Which of the following characteristics must be the same on two gears for their teeth to mesh correctly?
Diametral pitch and teeth width
Pressure angle and circular pitch
Pitch diameter and pressure angle
Diametral pitch and pressure angle
Which of the following ratios are equivalent?
Teeth and outside diameter ratios
Pitch diameter and outside diameter ratios
Pitch diameter and teeth ratios
Backlash and circular pitch ratios
Which gears produce a thrust load?
Spur gears
Bevel gears and helical gears
Helical gears only
None
As opposed to sprockets and sheaves, adjacent gears
turn in the same direction
turn in the opposite direction
cannot turn
always turn at the same speed
If the driving gear of a two gear drive has 40 teeth and the driven gear has 10 teeth, the driven gear rotates
four times faster than the driving gear and in the same direction
four times faster than the driving gear and in the opposite direction
four times slower than than the driving gear and in the same direction
four times slower than the driving gear and in the opposite direction
Power is transferred between an electric motor and a pump with a two gear drive. Calculate the required number of teeth on a driven gear if the driven shaft must rotate at 1765 r/min. The driving gear is installed directly on the motor shaft and has 30 teeth. The motor plate indicates a nominal speed of 1000 r/min.
30 teeth
15 teeth
17 teeth
54 teeth
Which instrument is used to measure the amount of backlash between two meshed gears?
Tape rule
Feeler gauge
Dial indicator
Straight edge
