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6 Month 3 > Pneumatic troubleshooting > Flashcards

Pneumatic troubleshooting Flashcards

1
Q

What results when the air in a compressor is compressed to a smaller volume?

Moisture content increases
Pressure decreases
Pressure increases
Temperature decreases

A

Pressure increases 

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2
Q

A dynamic air compressor is frequently referred to as a

Liquid ring compressor
Non-positive displacement, compressor
Positive displacement, compressor
Reciprocating compressor

A

Non-positive displacement, compressor

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3
Q

The size of a compressor air intake filter is determined by the

Compressor duty
Compressor horsepower
Intake requirements,
Number of cylinders 

A

Intake requirements 

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4
Q

Corrosion resistant piping is used in pneumatic systems to

Extend pipe service life
Improve the appearance of the system
Provide better airflow
Reduce installation costs

A

Extend pipe service line 

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5
Q

After lubricating oil has been introduced into an airline, what is the recommended maximum distance that the air should travel?

10 feet
20 feet
30 feet
40 feet

A

30 feet

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6
Q

What kind of drawings should be used to show the interconnections between components

Cutaway
Perspective
Pictorial
Schematic

A

Pictorial

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7
Q

What is generally illustrated in a schematic drawing?

Component Interconnections
Functions and operations
Internal construction
Physical relationships

A

Functions and operations

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8
Q

Pilot or signal lines are shown on a schematic drawing as

A series of long dashes
A series of short dashes
Dotted lines
Solid lines

A

A series of long dashes

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9
Q

A schematic diagram can best be understood if the drawing is

Analyzed as a whole system
Drawn in the proper perspective
Printed on blue paper
Studied in small segments

A

Studied in small segments

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10
Q

Special schematic symbols are usually devised and drawn by the

Component manufacturer
Component purchaser
Maintenance draftsman
Plant engineering staff

A

Component manufacturer

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11
Q

In accordance with the American society of manufacturing engineers code, air receivers must be equipped with safety valves, and

Drain valves
Pressure gauges
Pressure control valves
Shut off valves

A

Pressure gauges

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12
Q

Slightly oversized pipe

Can help accommodate additional demands
May result in pressure loss
Should be avoided for safety reasons
Should be used only for main lines

A

Can help accommodate additional demands 

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13
Q

What is the proper spacing for pipe supports or hangers?

Close enough to prevent SAG
No less than 3 feet or more than 6 feet
Six times the pipe diameter
Three times the pipe diameter

A

Close enough to prevent sag

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14
Q

What should you do in an air leak occurs at a flared fitting 

Convert to pipe threads
Re-pipe the system
Replace the flare
Solder the joint

A

Replace the flare

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15
Q

What is the proper length for hoses used to connect pneumatic components

Only as long as necessary
The actual length +15%
Three times the hose diameter
2 feet longer than required

A

Only as long as necessary

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16
Q

A good planned maintenance program requires

Daily records to be kept on all piping
A special maintenance group
Regular equipment checks
All equipment to be inspected weekly

A

Regular equipment checks

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17
Q

A pneumatic system operated with excessive air pressure will usually have

Accelerated wear
Fast operating cycles
Increased production
Reduced maintenance

A

Accelerated wear

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18
Q

Most control valves in a pneumatic system are designed for use with pressure up to

  1. Psi.
    150 psi
    225 psi
    300 psi
A

150 psi 

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19
Q

The best time to perform a daily check on compressor room equipment is

At the end of the shift
Before the shift starts
Early in the shift
Near the middle of the shift

A

Early in the shift

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20
Q

The operating cycles of control valves and cylinder is used on production lines are usually entered in the

Departmental checklist
Master log sheet
Planned maintenance guide
Production record

A

Production record

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21
Q

Which of the following determines what troubleshooting checks to make in a pneumatic system?

Complexity of the piping
Sequence of procedures
The systems manufacture
The type and number of components

A

The type and number of components

22
Q

When you are troubleshooting a pneumatic system, first, check the

Compressor
Kind of actuator used
Machine blueprint
Supply air pressure

A

Supply air pressure 

23
Q

Which of the following would not be in the description section of an operations manual?

Actuating functions
Logic sequence
Signal functions
Troubleshooting procedures

A

Troubleshooting procedures, 

24
Q

Piston seals can be checked for leakage by

Checking for improved operation
Increasing the supply, air pressure
Manuel actuation of the piston
Observing the exhaust port for air

A

Observing the exhaust port for air

25
Q

Which of the following should you always inspect when troubleshooting a manually operated control valve for sluggish action?

Exhaust ports
Moving parts
Solenoid coils
Supply air pressure

A

Moving parts 

26
Q

Heat generated in the cylinder of a compressor during the compression stroke is best controlled by cooling the compressor and

Adding an after cooler
Adding an intercooler
Changing the compression speed
Limiting the compression pressure

A

Limiting the compression pressure 

27
Q

An air compressor operating in a dusty or oily atmosphere, should be cleaned at regular intervals with a

Air hose
Detergent
Nylon brush
Water hose

A

Detergent

28
Q

Which of the following causes the greatest discharge valve wear in a compressor? 

Ambient air temperatures
Carbon deposits
Compressor speed
Motor horsepower

A

Carbon deposits

29
Q

A motor starting controller on a compressor is checked for proper operation by starting the compressor after the

Compressor has been taken out of service
Pressure has built up in the system
Pressure is stabilized
Reservoir pressure has been relieved

A

Reservoir pressure has been relieved

30
Q

Which of the following is not a maintenance consideration common to all rotary compressors

Bearings
Intake valves,
Lubrication
Seals

A

Intake valves

31
Q

The best way of locating air control valve problems is to analyze the performance of the

Circuit components
Compressor components
Pressure regulator
Receiver, regulator

A

Circuit components

32
Q

Loss of power in a pneumatic control circuit can cause a circuit to

Get out of sequence
Have increase sensitivity
Lock into automatic operation
Lock into manual operation

A

Get out of sequence

33
Q

What is used to activate a solenoid on a pneumatic control valve?

An electric current
Hydraulic power
Pneumatic power
Solid state rectifier

A

An electric current 

34
Q

A control valve that will shift manually, but not automatically is likely to have

Excessive lubrication
High air pressure
High-voltage
Low air pressure 

A

Low air pressure

35
Q

The use of an improper lubricant in a control valve may result in all of the following, except

Shifting without a signal
Soft seals,
Swollen seals,
Varnish build up 

A

Shifting without a signal

36
Q

What type of pneumatic cylinder is used for most industrial applications?

Flanged
Lock ring
Threaded
Tie rod

A

Tie rod

37
Q

The primary purpose of a piston rod bushings is tO

Absorb, piston thrust
Act as a bearing
Improve cushioning
Reduce piston leakage

A

Act as a bearing

38
Q

Above what temperature do pneumatic cylinders require special seats

175°F
200°F
225°F
250°F

A

200°F

39
Q

Improperly tightened, or torqued tie rods on pneumatic cylinders will cause

Cracked piston rings
Excessive side play
Internal misalignment
Piston leakage

A

Internal misalignment

40
Q

What is the function of pneumatic cylinder cushions?

Break the load
Prevent cylinder damage
Prevent tie rod breakage
Regulate stroke, speed

A

Prevent cylinder damage

41
Q

The normal service life of air motors can be improved by

Careful handling
Clean filter, the air
Large quantities of oil
Proper storage

A

Clean filtered air

42
Q

Which of the following Is a proper lubricant to use when installing hose couplings

Light spindle oil
Non-detergent oil
Soapy solution
Water resistant grease

A

Soapy solution

43
Q

Air motors require careful handling during this assembly and assembly because they are
Constructed with loose parts
Lubricated by various methods
Of varying sizes and shapes
Precision built

A

Precision built

44
Q

Special attention should be given to the______ of pneumatic grinders

Arbor shafts
Governor flanges
Safety governors
Shaft bearings

A

Arbor shafts

45
Q

Radial piston, air motors require less maintenance than other air motors because they have

Fewer parts
Positive lubrication
Slower operating speeds
Subassembly construction

A

Slower operating speeds

46
Q

The low pressure in the hydraulic end of an air oil tank system is overcome by the use of

A separate oil pump
Double acting cylinders
High pressure air
Large work cylinders

A

Large work cylinders

47
Q

The main components of air oil boosters are the

Air Pistons, and hydraulic rams
Approach and return tanks
Control valves
Hydraulic cylinders

A

Air pistons and hydraulic rams

48
Q

What valve adjusts the makeup and return tank, oil levels, and a single pressure booster system

Automatic pressure valve
Manual shut off valve
Pressure differential valve
Standard four-way valve

A

Manual shut off valve

49
Q

In a combined single unit air oil cylinder, the fluids are separated by

A bleeder space
A floating piston
A vacuum chamber
Pressurized gas

A

A bleeder space

50
Q

One advantage of interlocked independent air oil system is their

Increased speed of operation
Isolated control function
Nonsequential cylinder operation
Separate power sources

A

Increase the speed of operation

6 Month 3 (20 decks)

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