Moving Loads Pneumatically

A stop tube helps reduce cylinder rod bearing wear due to ___.

• Overheating

• Over speeds

• Side loads

• Low air pressure

To move a load with a pneumatic motor, the starting torque of the motor must be greater than both the ___ and the ___. (Select two)

• Friction between the motor internal components

• Running torque of the motor

• Breakaway torque of the load

• Running torque of the load

As a rule of thumb, pneumatic cylinders are oversized by a factor of ___%

• 1-2

• 5-10

• 10-15

• 20-50

A pulled load is called a ___ load.

• Bilateral

• Transverse

• Compression

• Tension

A regulator and a ___-way valve works well in a double-acting cylinder circuit such as a lift table.

• 3

• 2

• 4

• 6

When selecting a pneumatic motor use ___ of the available pressure at the motor to determine motor size.

• 1/3

• 1/2

• 2/3

• 3/4

Pneumatic components are sized by calculating the ___ needed by the actuators.

• Rod diameters

• Cylinder volumes

• Sum of the pressures

• Free air flow rates

Air bearing size depends on the air pressure and the ___.

• Load being moved

• Surface smoothness

• Venturi orifice size

• Air speed

When a piston starts its stroke, it must ___.

• Accelerate to full speed

• Decelerate immediately

• Maintain constant velocity

• Wait for a buildup of air pressure

Precise positioning of pistons in air cylinders ___.

• Can only be done with mechanical stops

• Is done by closing the DCV valve

• Is done by reducing air pressure

• Cannot be done