Basic System 22

Question 1

What’s is the definition of a system

Answer 1

A series of pipes and components to move a substance from one place to another.

Question 2

What the the two types of systems and give an example of each

Answer 2

Closed system and open system

Examples - water to tap (open)
Fuel system (open)

                 Refrigeration system(closed)
                 Hydraulic system (closed)

Question 3

State three methods of measuring the level of a tank.

Answer 3

Gauge glass
Sounding tube
Content gauge

Question 4

State the purpose of a strainer and what it may be constructed from.

Answer 4

To remove large debate from a fluid from service tank. Found before the filter.

Metallic ( metal plate with holes )

Question 5

Give examples of materials used in pipe work and a example of each.

Answer 5

Copper - fresh water
Plastic - waste
Brass- castings
Copper nickel - lube oil
Phosphor bronze - salt water/ high pressure

Question 6

What would need to be considered when selecting a material for a seal

Answer 6

Temperature
Fluid
Pressure

Question 7

Give examples of material used to manufacture seals

Answer 7

Cork
Paper
Wool silicon
Wax
NAF (non asbestos fibre)

Question 8

State examples of seals used

Answer 8

Keeler ring - high pressure pipe work connection.

Mechanical seal - rotating components eg pump shaft.

Question 9

State 6 types of valves

Answer 9

Non return valve
(PRV) pressure relief valve
Reducing valve
Pressure control valve

Globe valve
Gate valve
Saunders valve
(Rov) remote operated valve
Ball seated cock

Question 10

Explain the function of a pressure relief valve

Answer 10

Realise pressure to prevent over pressurisation

Question 11

Explain the function of a non return valve

Answer 11

Prevents reverse flow in a system

Question 12

State two different types of non return valve

Answer 12

Flap valve
Spring / piston valve

Question 13

What are the two main types of pump and how do they differ.

Answer 13

Positive displacement pump - has a constant flow rate. Slower flow increase pressure

Dynamic displacement pump - Higher flow lower pressure, higher flower slower pressure.

Question 14

A gear pump is what type of pump

Answer 14

Positive displacement

Question 15

State 4 types of system indicators

Answer 15

Bourdon tube
Tachometer
Manometer
Thermometer

Question 16

State 3 types of thermometer

Answer 16

Fixed brass
Standard pocket
Clock/dial faced

Question 17

What is the purpose of a filter and what may be used in its construction

Answer 17

A filter removes small particles and debris from a fluid made from materials such as paper, fabrics, metallic mesh, sponge.

Question 18

If a filter becomes blocked what will happen to the pressure on the supply and discharge

Answer 18

Supply side - pressure will increase
Discharge side - pressure will decrease

Question 19

What is the purpose of a pressure control valve

Answer 19

Maintain pressure at requires level - measuring the outlet of the valve

Question 20

What is the purpose of rod gearing

Answer 20

To operate a valve from a remote gearing

Question 21

What is the purpose of an accumulator and what types may be used

Answer 21

To store potential energy and reduce pulsation from the engine.

Spring piston and bladder.

Question 22

Types of tanks

Answer 22

Service tank
Drain tank
Header tank