Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

6 Month 3 > Hydraulic Troubleshooting > Flashcards

Hydraulic Troubleshooting Flashcards

1
Q

To what type of energy does a hydraulic system convert electrical energy?

Chemical
Heat
Static
Usable

A

Usable 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the function of a control valve in a hydraulic system?

Directs fluid
Regulates pressure
Regulates flow
All of the above

A

All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The hydraulic fluid in a system must be able to transmit power, and

Compensate for wear
Lubricate the system
Provide a breaking force
Reduce fluid consumption

A

Lubricate the system 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Before working on a hydraulic system, the most important requirement is to

Be able to read schematic diagrams
Be able to repair all components
Have worked on the system previously
Understand the systems operation

A

Understand the systems operation 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

If a hydraulic system is to function properly, it must

Be free of return lines
Be simple in construction
Have all components installed correctly
Have an oversized pump

A

Have all components installed correctly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the following types of drawings illustrate the general location and appearance of a systems elements?

Cutaway
Pictorial
Schematic
All of the above

A

Pictorial

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What type of drawing illustrates the elements that make up a hydraulic system?

Cutaway
Line drawing
Schematic
All of the above

A

Schematic 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

On a schematic, drawing hydraulic components are represented by

Color coding
Cross-section drawings
Symbols
Trademarks

A

Symbols 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The first thing you do when you read a schematic of a hydraulic system is to

Count the number of components
Identify the easiest components
Locate all actuators
Obtain an overall view of the system

A

Obtain an overall view of the system


How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A schematic drawing of a hydraulic control valve illustrates fluid flow, and

Fluid temperature
Fluid pressure
Port size
Valve function

A

Valve function 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

When installing hydraulic components, you should follow the installation techniques that

Are required for each component
Are the fastest
Relate to other components
Require the least number of tools

A

Are required for each component

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In order to provide proper alignment between a hydraulic pump and the driving motor or you should always

Allow some end thrust on the pump
Mount the motor horizontally
Provide a flexible coupling
Use an oversized motor shaft 

A

Provide a flexible coupling 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which of these procedures should be followed, when starting a newly installed pump

First run the pump without priming
Jog the drive motor
Pump into a charged system
Use hydraulic pipe dope for all connections

A

Jog the drive motor 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A stack of hydraulic control valves held together by bolts is called a

Manifold
Power pack
Reservoir
Solenoid

A

Manifold 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following statements about installing solenoid valves is not true?

Be sure the seals are clean
Check the valve, action mechanically
Clip off the leads of the valve
Is first turn on electric power 

A

Clip off the leads at the valve 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Pump suction, or inlet pipes should always be equal to, or larger than the

Pump intake
Return lines
Suction strainer
Suction filter

A

Pump intake

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Which of the following must be considered when selecting hydraulic tubing?

Material
Tube ID
Wall thickness,
All of the above 

A

All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which of the following should be avoided when assembling tubing

Additional supports
Straight line connections
Tube Bends
All of the above

A

Straight line connections 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The disadvantage of using hydraulic hose and hydraulic system is that it

Always has a restricted opening
Is more difficult to install
Is not always available
Wears is out more quickly than tubing

A

Wears out more quickly than tubing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which of the following best describes most seals used in hydraulic components?

Pre-energized
Preformed
Pre-lubricated
Prepackaged

A

Preformed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the primary function of a hydraulic fluid?

Absorb shock
Create pressure
Lubricate the system
Transmit force and energy

A

Transmit force and energy

22
Q

The lubricating capability of a hydraulic fluid is dependent, mostly upon It’s

Antifoam agents
Rust inhibitor’s
Temperature stability
Viscosity

A

Viscosity

23
Q

Which of the following items affects hydraulic fluid viscosity the most?

Additives
Operating speed
Temperature
Viscosity index

A

Temperature

24
Q

When you select a hydraulic fluid, always make sure it is

Compatible with the system
Fire resistant
Free of additives
Nontoxic

A

Compatible with the system

25
Q

Before filling a hydraulic system with hydraulic fluid, always make sure of the

Amount of cooling required
Reservoir capacity limits
System being clean,
Total system capacity

A

System being clean


26
Q

The interval of time between inspections on a specific hydraulic system, depends on the

Number of lubrication points
Other systems in the plant
Physical size of the system
Type of system 

A

Type of system

27
Q

Because inspections are made to locate trouble before a breakdown occurs they are classified as

 Periodic maintenance
Preventative maintenance
Repair maintenance
Routine maintenance

A

Preventative maintenance

28
Q

After how many operating hours should the fluid in a hydraulic system be sent out for laboratory analysis?

100
500
1000
1500

A

1000


29
Q

In many cases repair maintenance can be scheduled for a later time. Under what conditions should this procedure not be followed?

When safety hazards exist
When it occurs at the beginning of a production run
When it occurs near the end of the shift
When the department is on overtime

A

When safety hazards exist

30
Q

When should hydraulic systems elements be reconditioned?

Continuously
Periodically and whenever they break down
Whenever the fluids changed
Whenever the filters are changed

A

Periodically and whenever they break down

31
Q

Troubleshooting is best described as a means of determining trouble in a system by

Low pressure cycling
Means of logical sequence
Observing a duplicate system
Replacing the logical, faulty components

A

Means of logical sequence

32
Q

Prior to troubleshooting a hydraulic system you should first evaluate the systems and then

Determine the cause
Order the necessary spare parts
Repair of the problems as quickly as possible
Take the machine out of production

A

Determine the cause

33
Q

The best way to protect a pressure gauge from surges is by

Disconnecting the gauge
Installing a shut off valve
Installing a plug valve
Using a snubber with the gauge

A

Using a snubber with the gauge

34
Q

When Are fluid flow meters or gauges most commonly used in a hydraulic system?

During high pressure periods
During installation
During testing
Whenever practical

A

During testing

35
Q

Which of the following documents is most helpful in solving a hydraulic system problem?

Maintenance record
Manufactures part list
Operators manual
Work repair order

A

Maintenance record

36
Q

The best way to determine if a valve is the cause of a system of function is to

Inspect it for wear
Replace the solenoid
replace the valve
Test the circuit

A

Test the circuit

37
Q

whenever a valve is disassembled for inspection or repair. You should always.

Coat it with preservative
Hone out of the cylinder
Replace the seals
Rewire the solenoid

A

Replace the seals 

38
Q

Which of the following causes sludge formation

A bent valve stem
A jammed valve Spool
Low fluid viscosity
Overheating of hydraulic fluid

A

Overheating of hydraulic fluid 

39
Q

Which of the following could cause solenoid coil burnout in a directional control valve?

Bent valve linkage
Contaminants in the valve
Excessive current flow
All of the above

A

All of the above

40
Q

Which of the following tells how directional control valves should always be reassembled?

Carefully
Connected to the pump
Quickly
All of the above

A

Carefully 

41
Q

Cylinder rod misalignment is usually caused by

A pivot-mounted cylinder
Excessive pressure
Insufficient pressure
Side loading

A

Side loading

42
Q

A probable cause of and unmovable or slow moving cylinder may be

A blocked speed control valve
An incorrect type of pump
An oversized cylinder
Excessive system piping

A

A blocked speed control valve 

43
Q

Which of the following hydraulic fluids is suitable for fire resistant applications?

Water-based fluids
Emulsions
Phosphate esters
All of the above

A

All of the above

44
Q

Before connecting a cylinder to the hydraulic system, you should first

Clean the piping system
Fill the cylinder with fluid
Fill the reservoir
Vent the pump

A

Clean the piping system

45
Q

Which of the following items is essential to proper cylinder performance?

Accurate mounting
Piston rod boots
Speed control valves
All of the above

A

Accurate mounting


46
Q

Visual inspection of an operating hydraulic pump, or motor is limited because

The high pressure is too dangerous
The parts are moving too fast
You cannot see the internal parts
You cannot view the pump or motor from enough different angles

A

You cannot see the internal parts 

47
Q

Broken pump rotors, fractured teeth, or vanes and repeated seal blowout are usually caused by.

Excessive pump speed
Insufficient lubrication
Pressure shocks
Relief valve set to low

A

Pressure shocks



48
Q

Excessive wear and roughness in a gear pump are indications of

An undersized pump
Poor manufacturing techniques
Solid contaminants in the system
Too large driving motor

A

Solid contaminants in the system


49
Q

It is important to keep all contaminants out of piston pumps because of the pumps

Close-tolerance construction
Inlet port sizes
Soft iron pistons
Speed of operation

A

Close, tolerance, construction

50
Q

It is good and maintenance practice to replace which of the following when a hydraulic pump is repaired?

Anti-friction bearings gaskets and seals
Anti-friction bearings, gears and gaskets
Gaskets shafts, and shaft seals
Gears, gaskets, shafts, and relief valve

A

Anti-friction bearings gaskets and seals 

6 Month 3 (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions