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WorksheetsMoving Loads Pneumatically
Total questions: 20
Worksheet time: 10mins
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
To prevent rod buckling in some cylinder applications, manufacturers provide ___.
Titanium Rods
Oversized rods
Larger bearing supports
Rod limiters
As soon as air begins to flow through a pressure regulator, the downstream pressure begins to drop off. This characteristic is called ___.
Droop
Fade
Sag
Taper
A special type of valve that increases the exhaust flow to minimize the effects of decaying exhaust pressure in a cylinder is called a ___ valve.
Standard
Quick
Lateral
Retracting
The photo tachometer ___.
Uses a beam of light pointed at the motor's shaft
Must be in contact with the rotating shaft
Is built into the pneumatic motor
Can only be used in bright daylight
The function of an air bearing is to ___.
Reduce the free air consumption of a pneumatic motor
Provide support to a pneumatic cylinder rod for an eccentric load
Reduce friction on a motor shaft
Provide a cushion between two surfaces
___ mounted cylinders are used where the cylinder body must rotate as the cylinder operates.
Foot
Flush
Clevis
Flange
The quick exhaust valve has ___ ports.
2
3
4
5
The amount of torque a pneumatic motor will generate when it begins to turn from a stopped position is the ___.
Starting torque of the motor
Running torque of the motor
Breakaway torque of the load
Running torque of the load
Internal cushions in a pneumatic cylinder ___.
Provide a slight bounce to the load
Provide for eccentric loads on a piston
Trap exhaust air to slow the piston to a safe stop
Are only used for test purposes and should be removed for normal operation
The free air flow rates for air motors are obtained from air consumption versus ___ graphs.
RPM
BTU
IPS
LPM
