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Fast Track > Basic Systems > Flashcards

Basic Systems Flashcards

1
Q

What is the definition of a system?

A

A series of INTERCONNECTING PIPES and components to deliver a substance fro one point to another

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2
Q

What is an open loop system?

A

When the fluid is consumed

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3
Q

What is a closed loop system?

A

Working fluid is re used

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4
Q

Example of an open loop system

A

Fuel system

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5
Q

Example of a closed loop system

A

Fresh water cooling system

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6
Q

What is a fuel system?

A

Fuel is taken from storage
And delivered in a clean water free condition
To injectors of the diesel engine

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7
Q

Name the 3 types of tanks

A

Header, service, drain

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8
Q

What is a header tank?

A

Reservoir to top up tank or system

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9
Q

What is a service tank?

A

Reservoir of water free fuel

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10
Q

What is a drain tank?

A

Collects oil from a system

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11
Q

What is a tank gauge for?

A

Used for measuring fuel in a tank

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12
Q

Name the 3 types of tank gauge

A

Contents
Sounding
Gauge Glass

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13
Q

What is a contents gauge for?

A

Hom much liquid

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14
Q

What does the sounding gauge measure?

A

Depth measured with dip tape and conversion chart

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15
Q

What does gauge glass measure?

A

How much is left in a tank

Press the button to open the valve and get a correct reading

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16
Q

Explain the process of dipping a tank

A
  1. Dip tape is lowered through a sounding tube
  2. The tape will indicate the depth
  3. Shown in height and inches
  4. Convert the measurement into litres / tonnes with a conversion chart
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17
Q

What are strainers for?

A

Removing large coarse particles

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18
Q

What does the type of pipework depend on?

A
  1. The service it provides
  2. Temperature
  3. Other materials being used
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19
Q

Name the types of pipework

A

Phosphor Bronze
Copper
Copper Nickel
Brass
Plastic

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20
Q

What is phosphor bronze used for?

A

HPSW

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21
Q

What is Copper pipework used for?

A

FW systems

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22
Q

What is Copper nickel pipework used for?

A

Lub Oil

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23
Q

What is brass pipework used for?

A

Castings

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24
Q

What is plastic pipework used for?

A

Sewage, and Pre Wet

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25
Q

What do the type of seals depend on?

A
  1. Pressure
  2. Fluid
  3. Temperature
26
Q

Name the types of seal

A

Gaskets
Mechanical
Keelering Couplings
Gland Packing

27
Q

What are gaskets made from?

A

Paper , Rubber

28
Q

What do valve’s do?

A

Control the flow of liquid or gas to isolate various systems

29
Q

What is a globe valve?

A

2 way flow, non return, non return and lift

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30
Q

What do gate valves do?

A

Large bore systems (Vent Trunking)
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31
Q

What do flap valves do?

A

Non return

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32
Q

What do Saunders valves do?

A

Rubber diaphragm

Used in water and fuel system

33
Q

What do ball seated cockspur do?

A

90’ turn

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34
Q

What do pressure relief valves do?

A

Kept closed by spring pressure, is pressure exceeds, valves are forced open

Prevents overpressurisation

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35
Q

What do pressure reducing valves do?

A

Allows fluid and gas to expand reducing its pressure

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36
Q

What do non return valves do?

A

Allow substances to pass through, but prevents flow in the opposite direction

37
Q

What do pumps do?

A

Moves liquid at pressure through many metres of pipework

38
Q

Name the different types of pimp

A

Centrifugal
+ve displacement
Axial
Hand

39
Q

What do positive displacement pumps do?

A

Physically moves fluid

As the fluid moves, pressure increases

Reciprocating and Rotary

40
Q

What do dynamic displacement pumps do?

A

Moves fluid with energy from an impeller

As fluid slows down, energy state changes

Change of state is due to Bernoullis Theorem

41
Q

Bernoullis Theorem

A

As speed increases, pressure decreases

42
Q

What does a motor do?

A

Converts electrical energy into mechanical motion

In a HPSW system, Motors drive pumps

43
Q

Name the system indicators

A

Vacuum Gauge
Tachometer
Thermometer
Flow meter
Voltage meter

44
Q

How can a gauge be isolated from a system

A

Gauge cock

45
Q

Relationship of bourdon tube and pressure

A

As bourdon tube Extends, pressure increases

46
Q

What does a manometer give a visual representation of?

A

Pressure

47
Q

What does a tachometer visually represent?

A

Speed

48
Q

What does a thermometer visually represent?

A

Temperature

49
Q

3 types of thermometer

A

Fixed Brass
Pocket / Oblong
Clock / Dial

50
Q

What is a fixed brass thermometer?

A

Yellow and black stripes

51
Q

What does a pocket / oblong thermometer do?

A

Plug screwed into threaded hole in a system

52
Q

What is the fluid inside thermometers?

A

Transmission Fluid

53
Q

What do voltmeter measure?

A

Potential Difference

54
Q

What do filters do?

A

They remove small fine particles

55
Q

Explain metallic filters

A

Made from wire wool

Can be reused

56
Q

Explain absorbant filters

A

Made from paper and cloth

Can be replaced

57
Q

Name the 2 types of filter

A

Metallic and Absorbant

58
Q

What do pressure control valves do?

A

Maintain pressure at a certain level

Opens and closes valve

59
Q

What is Rod gearing?

A

Valves can be manually shut from another location

Used in emergencies

60
Q

What is a pressure relief valve

A

Prevents Over pressurisation

61
Q

What does an accumulator do?

A

Holds potential difference under pressure

Exerts force on incompressible fluids

Smooth pulsations and stores energy

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