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Level 2a Plumbing > Plumbing Science > Flashcards

Plumbing Science Flashcards

1
Q

What four different groups can metal be divided into

A

Alloy
Pure
Ferrous
Non-ferrous

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2
Q

What two types of plastic are there

A

Thermoplastic
Thermo-setting plastics

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3
Q

What different type of liquid do you come across in plumbing

A

Water
Refrigerant
Anti-freeze/glycol mixes
Fuel oils
Lubricant/greases

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4
Q

What is toughness

A

The amount of energy a material can absorb without breaking or fracturing

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5
Q

What is strength

A

The measure of how Material withstand heavy loads without breaking

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6
Q

What is shear strength

A

The maximum force a material can withstand when being ripped

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7
Q

What is elasticity

A

The length that a material can be stretched and return to it’s original length when released

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8
Q

What is the si unit for temperature

A

Kelvin

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9
Q

What three different ways can you transfer heat

A

Conduction
Convention
Radiation

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10
Q

What a three states of matter

A

Solid
Liquid
Gas

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11
Q

What is the si unit for mass

A

Kilograms

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12
Q

What is compressive strength

A

The maximum force a material can withstand when being crushed

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13
Q

What is hardness

A

The resistance of material to being cut , deformed or bent

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14
Q

What is torsion strength

A

The maximum force a material can withstand when being twisted

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15
Q

What is heat and electrical conductivity

A

The measure of how well a material conducts heat and electricity

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16
Q

What is heaviness

A

The denseness of a material. A dense material will be heavy in relation to its size

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17
Q

What is the purpose of insulation in a hot water cylinder?

A

To prevent heat loss and save energy

18
Q

How is soldering able to run a pipe

A

Capillary action

19
Q

What type of water corrodes pipe work

A

Soft water

20
Q

Which type of water is difficult to lather

A

Hard water

21
Q

Limescale deposits form by which type of water?

A

Temporary hard water

22
Q

What percentage does water expand by when it’s frozen?

A

10%

23
Q

What temperature is water’s maximum density?

A

4 degrees Celsius

24
Q

What is velocity

A

The rate and direction of the change in the position of an object

25
Q

What is acceleration

A

Acceleration is defined as the rate at which an object changes its velocity

26
Q

What is flow rate

A

The amount of fluid that flows in a given time

27
Q

What is force

A

A force is a push or pull upon an object that causes a change in the motion of that object

28
Q

What is force due to gravity

A

The force of gravity is the force exerted by the gravitational field of a massive object on anybody within vicinity of it’s surface

29
Q

What is pressure

A

Pressure is an expression of force exerted on a surface per unit area

30
Q

What is atmospheric pressure

A

An atmosphere (atm) is a unit of pressure based on the average
atmospheric pressure at sea level. The actual atmospheric pressure
depends on many conditions, e.g. altitude and temperature.

31
Q

What is polypropylene used for

A

Push-fit waste and overflow pipe
Cold water storage cistern

32
Q

What is polybutylene used for

A

Push fit hot and cold water installation
Central heating installation

33
Q

How do you measure volume

A

Length x width x height

34
Q

What is the thermal conductivity of silver

A

406.0

35
Q

What is thermal conductivity of copper

A

397.0

36
Q

What is thermal conductivity of gold

A

317.0

37
Q

What is thermal conductivity of brass

A

109.0

38
Q

What is the thermal conductivity of steel

A

50.2

39
Q

What is the thermal conductivity of lead

A

34.7

40
Q

What type of simple machine are there

A

Levers
Pulley
Archimedean screws

41
Q

What is siphonage

A

the loss of water seal from fixture traps resulting from partial vacuum in the drainage system

Level 2a Plumbing (2 decks)

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