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level 2 plumbing > mock test > Flashcards

mock test Flashcards

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1
Q

what is the first stage of a rainwater cycle?

A

evaporation

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2
Q

what is a reliable water source?

A

springs

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3
Q

what makes water plumbo-solvent?

A

soft water with added c02

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4
Q

what is the primary purpose of flocculation in water treatment?

A

to remove colour and turbidity

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5
Q

which system supplies water directly to all outlets without storage?

A

direct cold water system

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6
Q

what is the typical size of a rising main for most dwellings?

A

15mm

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7
Q

what device prevents backflow in outdoor taps?

A

gate valve

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8
Q

what is fluid category 1 water classified as?

A

wholesome water for domestic use

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9
Q

what do the water supply (water fittings) Regulations 1999 aim to prevent?

A

misuse of water

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10
Q

at what depth should a supply pipe be installed?

A

750-1350mm

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10
Q

what is the final stage of the water treatment process?

A

disinfection

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11
Q

what does the water act 2003 primarily regulate?

A

water industry operations and standards

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12
Q

what is a major disadvantage of a direct cold water system?

A

risk of contamination during failure

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13
Q

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

A

22mm

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14
Q

what is back syphonage?

A

reversal of flow due to a sudden loss of pressure

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15
Q

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

A

AUK3

16
Q

which type of pump boosts water after the shower valve?

A

submersible

17
Q

which valve ensures full bore water flow in low-pressure systems?

A

gate valve

18
Q

what does activated carbon in filters primarily remove?

A

chlorine and odors

19
Q

what is a unique feature oof thermostatic mixing valves?

A

built-in UV disinfection

20
Q

who is responsible for monitoring private water supplies?

A

local authorities

21
Q

what level of chlorine is typically added during disinfection?

A

less than 1mg/L

level 2 plumbing (3 decks)

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