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Moving Loads Pneumatically

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

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

a)

Overheating

b)

Over speeds

c)

Side loads

d)

Low air pressure

2.

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

a)

Friction between the motor internal components

b)

Running torque of the motor

c)

Breakaway torque of the load

d)

Running torque of the load

3.

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

a)

1-2

b)

5-10

c)

10-15

d)

20-50

4.

A pulled load is called a ___ load.

a)

Bilateral

b)

Transverse

c)

Compression

d)

Tension

5.

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

a)

3

b)

2

c)

4

d)

6

6.

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

a)

1/3

b)

1/2

c)

2/3

d)

3/4

7.

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

a)

Rod diameters

b)

Cylinder volumes

c)

Sum of the pressures

d)

Free air flow rates

8.

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

a)

Load being moved

b)

Surface smoothness

c)

Venturi orifice size

d)

Air speed

9.

When a piston starts its stroke, it must ___.

a)

Accelerate to full speed

b)

Decelerate immediately

c)

Maintain constant velocity

d)

Wait for a buildup of air pressure

10.

Precise positioning of pistons in air cylinders ___.

a)

Can only be done with mechanical stops

b)

Is done by closing the DCV valve

c)

Is done by reducing air pressure

d)

Cannot be done

11.

To prevent rod buckling in some cylinder applications, manufacturers provide ___.

a)

Titanium Rods

b)

Oversized rods

c)

Larger bearing supports

d)

Rod limiters

12.

As soon as air begins to flow through a pressure regulator, the downstream pressure begins to drop off. This characteristic is called ___.

a)

Droop

b)

Fade

c)

Sag

d)

Taper

13.

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.

a)

Standard

b)

Quick

c)

Lateral

d)

Retracting

14.

The photo tachometer ___.

a)

Uses a beam of light pointed at the motor's shaft

b)

Must be in contact with the rotating shaft

c)

Is built into the pneumatic motor

d)

Can only be used in bright daylight

15.

The function of an air bearing is to ___.

a)

Reduce the free air consumption of a pneumatic motor

b)

Provide support to a pneumatic cylinder rod for an eccentric load

c)

Reduce friction on a motor shaft

d)

Provide a cushion between two surfaces

16.

___ mounted cylinders are used where the cylinder body must rotate as the cylinder operates.

a)

Foot

b)

Flush

c)

Clevis

d)

Flange

17.

The quick exhaust valve has ___ ports.

a)

2

b)

3

c)

4

d)

5

18.

The amount of torque a pneumatic motor will generate when it begins to turn from a stopped position is the ___.

a)

Starting torque of the motor

b)

Running torque of the motor

c)

Breakaway torque of the load

d)

Running torque of the load

19.

Internal cushions in a pneumatic cylinder ___.

a)

Provide a slight bounce to the load

b)

Provide for eccentric loads on a piston

c)

Trap exhaust air to slow the piston to a safe stop

d)

Are only used for test purposes and should be removed for normal operation

20.

The free air flow rates for air motors are obtained from air consumption versus ___ graphs.

a)

RPM

b)

BTU

c)

IPS

d)

LPM