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ME150/21/13 > Basic Systems > Flashcards

Basic Systems Flashcards

1
Q

What is a header tank?

A

Used to top up a system.

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2
Q

What is a service tank?

A

Used as a reservoir of clean, water free supply of fuel.

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3
Q

What is a drain/sump tank?

A

Used to collect oil returning from a system and acts as a reservoir.

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4
Q

What is an open loop system? (Plus example)

A

The working fluid is used up, e.g. fuel system.

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5
Q

What is a closed loop system? (Plus example)

A

The working fluid is reused, e.g. cooling system.

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6
Q

Define a system.

A

A system is a series of interconnecting pipes and components that will deliver a substance from one point to another.

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7
Q

Name the 2 major groups of pumps and their individual function(s).

A
  1. Positive displacement pump. This pump physically displaced and moves the fluid along, as the fluid is moving pressure increases.
  2. Dynamic displacement pump. This pump moves a fluid by using the energy from an impeller to accelerate the fluid.
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8
Q

What is the function of a strainer?

A

A strainer stops large particles from getting into a system.

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9
Q

What is the symbol for a strainer and a filter?

A

Strainer - Rectangle box with an S.

filter - Rectangle box with an F.

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10
Q

Give an example of a positive displacement pump.

A

Piston.

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11
Q

Give an example of a dynamic displacement pump.

A

Centrifugal.

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12
Q

How many litres is 1 ton?

A

1000l.

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13
Q

What is a sounding tube used for?

A

Used to measure fluid level in a system. (Like a dip stick)

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14
Q

What is copper pipe work used for?

A

Fresh water.

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15
Q

What is plastic pipe work used for?

A

Waste water.

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16
Q

What does dissimilar metals mean?

A

Not the same metal.

17
Q

What is Copper Nickel pipe work used for?

A

Lubricating oil system.

18
Q

What is Phosphor Bronze pipe work used for?

A

Saltwater.

19
Q

What is Brass pipework used for?

A

Castings, junctions and taps.

20
Q

State 4 things to consider when deciding pipework.

A
  1. Pressure.
  2. Temperature.
  3. Fluid.
  4. Other materials.
21
Q

What is an alloy?

A

A blend of different metals to give desirable properties.

22
Q

List 5 materials used in pipework.

A
  1. Phosphor bronze.
  2. Copper.
  3. Copper nickel.
  4. Brass.
  5. Plastic.
23
Q

What do you test for on the lubricating oil system?

A
  1. Water. - can cause corrosion or rust.

2. Viscosity.

24
Q

List the types of seals.

A
  1. Gasket.
25
Q

List the types of valve. (8)

A 
Globe valve - screw down non return. 
Gate valve. 
Flap valve - non return. 
Saunders valve - electrically fitted ‘solenoid’. 
Ball seated cock. 
Relief valve. 
Reducing valve - reduces pressure of fluid going in to prevent over pressurisation. 
Non-Return Valve - prevents back-flow.
26
Q

State Bernoulli’s theorem/principle.

A

As the speed of a moving fluid increases, the pressure within the fluid decreases.

27
Q

Define convergence and divergence.

A

Convergent - Wide to narrow.
flow up, pressure down.
Divergent - narrow to wide.
Flow down, pressure up.

28
Q

State the function of a electrical motor. (give example)

A

Electrical motors convert electrical energy into mechanical motion. e.g. HPSWP (high pressure salt water pump)

29
Q

List the system indicators. (5)

A
  1. Pressure/vacuum gauge.
  2. Tachometer.
  3. Thermometers.
  4. Flow meters.
  5. Voltage meters.
30
Q

State two types of pressure gauge(s).

A
  1. Bourdon type.

2. Manometer.

31
Q

State the three types of thermometers.

A
  1. Brass type.
  2. Standard pocket.
  3. Dial type.
32
Q

State the function of a filter and give two types of them.

A
  1. Metallic.
  2. Absorbent.
    Filters are used to remove small or fine particles from a system.
33
Q

State the specific function of metallic and absorbent filters.

A

Metallic - Removes COURSER particles of contamination.

Absorbent - used to remover finer particles of contamination.

34
Q

What materials can absorbent filters be made out of? (4)

A
  1. Paper.
  2. Felt.
  3. Cloth.
  4. Yarn.
35
Q

How does a pressure control valve work?

A

Pressure control valves work by monitoring outlet pressure and opens and closes as required to remain at set system pressure.

36
Q

List two types of accumulator.

A
  1. Bag/bladder type.

2. Piston type.

37
Q

State the function of an accumulator.

A

A device in which potential energy is held under pressure. They can be used as a surge/pulsation dampener/absorber.

38
Q

List all 6 valves required for the Basic Systems exam.

A
  1. Non return valve.
  2. Saunders/solenoid valve.
  3. Pressure relief valve.
  4. Pressure control valve.
  5. Closed valve.
  6. Open valve.

ME150/21/13 (3 decks)

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