Basic Systems

Question 1

What is the definition of a system?

Answer 1

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

Question 2

What is an open loop system?

Answer 2

When the fluid is consumed

Question 3

What is a closed loop system?

Answer 3

Working fluid is re used

Question 4

Example of an open loop system

Answer 4

Fuel system

Question 5

Example of a closed loop system

Answer 5

Fresh water cooling system

Question 6

What is a fuel system?

Answer 6

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

Question 7

Name the 3 types of tanks

Answer 7

Header, service, drain

Question 8

What is a header tank?

Answer 8

Reservoir to top up tank or system

Question 9

What is a service tank?

Answer 9

Reservoir of water free fuel

Question 10

What is a drain tank?

Answer 10

Collects oil from a system

Question 11

What is a tank gauge for?

Answer 11

Used for measuring fuel in a tank

Question 12

Name the 3 types of tank gauge

Answer 12

Contents
Sounding
Gauge Glass

Question 13

What is a contents gauge for?

Answer 13

Hom much liquid

Question 14

What does the sounding gauge measure?

Answer 14

Depth measured with dip tape and conversion chart

Question 15

What does gauge glass measure?

Answer 15

How much is left in a tank

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

Question 16

Explain the process of dipping a tank

Answer 16

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

Question 17

What are strainers for?

Answer 17

Removing large coarse particles

Question 18

What does the type of pipework depend on?

Answer 18

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

Question 19

Name the types of pipework

Answer 19

Phosphor Bronze
Copper
Copper Nickel
Brass
Plastic

Question 20

What is phosphor bronze used for?

Answer 20

HPSW

Question 21

What is Copper pipework used for?

Answer 21

FW systems

Question 22

What is Copper nickel pipework used for?

Answer 22

Lub Oil

Question 23

What is brass pipework used for?

Answer 23

Castings

Question 24

What is plastic pipework used for?

Answer 24

Sewage, and Pre Wet

Question 25

What do the type of seals depend on?

Answer 25

1. Pressure 2. Fluid 3. Temperature

Question 26

Name the types of seal

Answer 26

Gaskets Mechanical Keelering Couplings Gland Packing

Question 27

What are gaskets made from?

Answer 27

Paper , Rubber

Question 28

What do valve's do?

Answer 28

Control the flow of liquid or gas to isolate various systems

Question 29

What is a globe valve?

Answer 29

2 way flow, non return, non return and lift |-O-| |>O<|

Question 30

What do gate valves do?

Answer 30

Large bore systems (Vent Trunking) _ |><|

Question 31

What do flap valves do?

Answer 31

Non return -|>|

Question 32

What do Saunders valves do?

Answer 32

Rubber diaphragm Used in water and fuel system

Question 33

What do ball seated cockspur do?

Answer 33

90' turn -<>-

Question 34

What do pressure relief valves do?

Answer 34

Kept closed by spring pressure, is pressure exceeds, valves are forced open Prevents overpressurisation } -|><|

Question 35

What do pressure reducing valves do?

Answer 35

Allows fluid and gas to expand reducing its pressure |>

Question 36

What do non return valves do?

Answer 36

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

Question 37

What do pumps do?

Answer 37

Moves liquid at pressure through many metres of pipework

Question 38

Name the different types of pimp

Answer 38

Centrifugal +ve displacement Axial Hand

Question 39

What do positive displacement pumps do?

Answer 39

Physically moves fluid As the fluid moves, pressure increases Reciprocating and Rotary

Question 40

What do dynamic displacement pumps do?

Answer 40

Moves fluid with energy from an impeller As fluid slows down, energy state changes Change of state is due to Bernoullis Theorem

Question 41

Bernoullis Theorem

Answer 41

As speed increases, pressure decreases

Question 42

What does a motor do?

Answer 42

Converts electrical energy into mechanical motion In a HPSW system, Motors drive pumps

Question 43

Name the system indicators

Answer 43

Vacuum Gauge Tachometer Thermometer Flow meter Voltage meter

Question 44

How can a gauge be isolated from a system

Answer 44

Gauge cock

Question 45

Relationship of bourdon tube and pressure

Answer 45

As bourdon tube Extends, pressure increases

Question 46

What does a manometer give a visual representation of?

Answer 46

Pressure

Question 47

What does a tachometer visually represent?

Answer 47

Speed

Question 48

What does a thermometer visually represent?

Answer 48

Temperature

Question 49

3 types of thermometer

Answer 49

Fixed Brass Pocket / Oblong Clock / Dial

Question 50

What is a fixed brass thermometer?

Answer 50

Yellow and black stripes

Question 51

What does a pocket / oblong thermometer do?

Answer 51

Plug screwed into threaded hole in a system

Question 52

What is the fluid inside thermometers?

Answer 52

Transmission Fluid

Question 53

What do voltmeter measure?

Answer 53

Potential Difference

Question 54

What do filters do?

Answer 54

They remove small fine particles

Question 55

Explain metallic filters

Answer 55

Made from wire wool Can be reused

Question 56

Explain absorbant filters

Answer 56

Made from paper and cloth Can be replaced

Question 57

Name the 2 types of filter

Answer 57

Metallic and Absorbant

Question 58

What do pressure control valves do?

Answer 58

Maintain pressure at a certain level Opens and closes valve

Question 59

What is Rod gearing?

Answer 59

Valves can be manually shut from another location Used in emergencies

Question 60

What is a pressure relief valve

Answer 60

Prevents Over pressurisation

Question 61

What does an accumulator do?

Answer 61

Holds potential difference under pressure Exerts force on incompressible fluids Smooth pulsations and stores energy