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8th 6th Month Period > TPC 308 Hydraulic Troubleshooting > Flashcards

TPC 308 Hydraulic Troubleshooting Flashcards

1
Q

Hydraulic systems convert the available power to ______ power.

A

usable

TPC 308 p. 5

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2
Q

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

A

All of the above

  • directs fluid
  • regulates pressure
  • regulates flow

TPC 308 p. 5

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3
Q

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

A

lubricate the system

TPC 308 p. 6

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4
Q

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

A

understand the systems operation

TPC 308 p. 6

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5
Q

If a hydraulic system is to function properly, it must…

A

have all components installed correctly

TPC 308 p. 11

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6
Q

What type of drawing illustrates the general location and appearance of a systems elements?

A

pictorial

TPC 308 p. 21

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7
Q

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

A

schematic

TPC 308 p. 21

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8
Q

On a schematic drawing, hydraulic components are represented by…

A

symbols

TPC 308 p. 22

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9
Q

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

A

obtain an overall view of the system

TPC 308 p. 25

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10
Q

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

A

valve function

TPC 308 p. 27

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11
Q

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

A

are required for each component

TPC 308 p. 37

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12
Q

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

A

provide a flexible coupling

TPC 308 p. 38

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13
Q

What procedure should be followed when starting a newly installed pump?

A

jog the drive motor

TPC 308 p. 41

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14
Q

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

A

manifold

TPC 308 p. 43

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15
Q

What statement about installing solenoids is NOT true?

A

clip off the leads at the valve

TPC 308 p. 47

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16
Q

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

A

pump intake

TPC 308 p. 54

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17
Q

What must be considered when selecting hydraulic tubing?

A

All of the above

  • material
  • I.D.
  • wall thickness

TPC 308 p. 55

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18
Q

What should be avoided when assembling tubing?

A

straight line connections

TPC 308 p. 58

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19
Q

The disadvantage of using hydraulic hose in a hydraulic system is that it…

A

wears out more quickly than tubing

TPC 308 p. 59

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20
Q

What best describes most seals used in hydraulic components?

A

preformed

TPC 308 p. 60

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21
Q

What is the primary function of a hydraulic fluid?

A

transmit force and energy

TPC 308 p. 69

22
Q

The lubricating capability of a hydraulic fluid is dependent mostly upon its…

A

viscosity

TPC 308 p. 69

23
Q

What affects hydraulic fluid viscosity the most?

A

temperature

TPC 308 p. 70

24
Q

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

A

compatible with the system

TPC 308 p. 75

25
Q

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

A

system being clean

TPC 308 p. 77

26
Q

The interval of time between inspection on a specific hydraulic system depends on the…

A

type of system

TPC 308 p. 85

27
Q

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

A

preventative maintenance

TPC 308 p. 87

28
Q

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

A

1000

TPC 308 p. 91

29
Q

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

A

when safety hazard exists

TPC 308 p. 91

30
Q

When should hydraulic systems elements be reconditioned?

A

periodically and when they break down

TPC 308 p. 92

31
Q

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

A

means of logical sequence

TPC 308 p. 100

32
Q

Prior to troubleshooting a hydraulic system, you should first evaluate the symptoms and then…

A

determine the cause

TPC 308 p. 101

33
Q

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

A

using a snubber with the gauge

TPC 308 p. 104

34
Q

When are fluid flowmeters or gauges most commonly used in a hydraulic system?

A

during testing

TPC 308 p. 104

35
Q

What document is the most helpful in solving a hydraulic system problem?

A

maintenance record

TPC 308 p. 106

36
Q

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

A

test the circuit

TPC 308 p. 117

37
Q

Whenever a valve is disassembled for inspection or repair, you should always…

A

replace the seals

TPC 308 p. 119

38
Q

What causes sludge formation?

A

overheating of hydraulic fluid

TPC 308 p. 120

39
Q

What could cause solenoid-coil burnout in a directional control valve?

A

All of the above

  • bent valve linkage
  • contaminants in the valve
  • excessive current flow

TPC 308 p. 123

40
Q

How should directional control valves always be reassembled?

A

carefully

TPC 308 p. 125

41
Q

Cylinder rod misalignment is usually caused by…

A

side loading

TPC 308 p. 132

42
Q

A probable cause of an immovable or slow-moving cylinder may be…

A

a blocked speed control valve

TPC 308 p. 134

43
Q

What hydraulic fluid is suitable for fire-resistant applications?

A

All of the above

  • water based fluid
  • emulsions
  • phosphate esters

TPC 308 p. 137

44
Q

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

A

clean the piping system

TPC 308 p. 138

45
Q

What is essential to proper cylinder performance?

A

accurate mounting

TPC 308 p. 138

46
Q

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

A

you cannot see the internal parts

TPC 308 p. 147

47
Q

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

A

pressure shocks

TPC 308 p. 149

48
Q

Excessive wear and roughness in a gear pump are indications of…

A

solid contaminants in the system

TPC 308 p. 149

49
Q

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

A

close tolerance construction

TPC 308 p. 152

50
Q

It is a good maintenance practice to replace what when a hydraulic pump is repaired?

A

anti-friction bearings, gaskets, and seals

TPC 308 p. 154

8th 6th Month Period (3 decks)

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