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plumbing science Flashcards

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1
Q

what is kelvin equal to

A

273

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2
Q

what’s a pure metal

A

a metal that consists of 1 atom

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3
Q

what’s a alloy

A

a alloy is a blend of 2 or more elements, one of which must be a metal

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4
Q

what’s a ferrous metal

A

a ferrous metal is what contains iron, suck as steel and cast iron

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5
Q

what are non ferrous metals

A

non ferrous metals don’t contain iron and do not rust

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6
Q

what is density equal too

A

mass divide volume

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7
Q

atmospheric pressure at sea level is

A

101.3Pa

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8
Q

what does pressure =

A

force

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9
Q

what is the ph number for pure water

A

7

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10
Q

name a malleable material

A

lead

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11
Q

what does ductile mean

A

how much something can be stretched or pulled

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12
Q

what the letters DZ stamped on modern brass fittings

A

de-zinced

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13
Q

what’s the best conductor of heat

A

copper

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14
Q

what is a drawback of soft water

A

can lead to health problems

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15
Q

what is meant by calorific value

A

the energy continued in a fuel or food

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16
Q

which gas has the highest calorific value

A

butane

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17
Q

how does conduction occur

A

heat travelling through or along a solid material

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18
Q

what’s the si unit of heat

A

kelvin

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19
Q

what is bar used for

A

it’s the unit we measure water with

20
Q

what’s the freezing point of water at sea level

A

0°C

21
Q

what water comes out of the tap

A

wholesome

22
Q

what is tensile strength

A

the max a material can withstand being pulled apart

23
Q

what is the hardness of a material

A

the resistance of material to be cut

24
Q

what’s the toughness of a material

A

the amount of energy a material can absorb without breaking

25
Q

what’s shear strength

A

the max force a material can withstand being ripped

26
Q

what is malleability

A

the amount of shaping a material can withstand without breaking

27
Q

what has a sinusoidal wave form

A

AC electricity

28
Q

what is the ohms law triangle

A

V I R

29
Q

the water in a hot water cylinder can exert its pressure where

A

downwards and sideways

30
Q

specific heat capacity is measured in

A

KJ/Kg/°C

31
Q

what is the first stage of the rainwater cycle

A

evaporation

32
Q

what is the primary purpose of flocculation in water treatment

A

to kill bacteria

33
Q

which system supplies water directly to all outlets without storage

A

direct cold water system

34
Q

in indirect systems what should cold water cisterns provide

A

adequate storage capacity

35
Q

at what depth should a supply pipe be installed

A

750-1350

36
Q

who is responsible for maintaining the communication pipe

A

water undertaker

37
Q

in a indirect cold water system which outlet is usually fed directly by the mains

A

kitchen sink

38
Q

what is the final stage of water treatment process

A

disinfection

39
Q

what does the water act 2003 primarily regulate

A

water industry operations and standards

40
Q

what size pipe is often used to supply baths for a good flow rates in an indirect system

A

22mm

41
Q

what is the purpose of a water tower in a distribution system

A

to increase pressure through height

42
Q

what category is fluid category 5

A

water containing pathogens

43
Q

what type of air gap is required for fluid category 5 in sinks

A

AUK2

44
Q

what type of pump
boosts water after the shower valve

A

single impeller

45
Q

what is required for cold water cisterns installed in the loft space

A

structural support

46
Q
A

plumbing science (1 decks)

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