cold water

Question 1

Which British Standard makes recommendation on the minimum of cold water storage cistern for a particular property?

Answer 1

Bs6700

Question 2

The water flow rate from a cold water tap is 8 litres per minute, what is the flow rate measured in litres per second?

Answer 2

0.13 l/s

Question 3

The quantity of fittings delivered to site by a plumbers merchant will be shown in a

Answer 3

Delivery note

Question 4

Which type of cold water system is normally used in a dwelling which has a high incoming water pressure?

Answer 4

e)Direct.

Question 5

The Water Regulations require that the warning pipe in a small cold water storage cistern must be

Answer 5

Sized to be able to cope with the flow if water if the inlet valve fails

Question 6

What is the required soundness test pressure pipe which has a maximum operating pressure of 4 bar? for a copper cold water supply

Answer 6

6bar

Question 7

8 What is the minimum recommended clip spacing distance for a 15 mm vertical copper pipe?

Answer 7

1800mm

Question 8

Which one of the following components must be sited immediately after the supply stop valve on entry to a dwelling?

Answer 8

Drain valve

Question 9

Before leaving site, open ended pipework connected to a live but isolated cold water supply must be

Answer 9

sealed with watertight stop ends

Question 10

Which one of the following is a key feature of a direct cold water system?

Answer 10

Cold water outlets are taken from the rising supply pipe

Question 11

Which one of the following types of device is suitable to provide backflow protection for a pair of pillar taps to a kitchen sink?

Answer 11

AUK3 air gap.

Question 12

What is the minimum recommended distance between the top of a cold water storage cistern and an adjacent sloping roof?

Answer 12

350mm

Question 13

What should be carried out before undertaking a soundness test on a completed cold water system?

Answer 13

Visual inspection

Question 14

What is the minimum recommended distance for an insulated cold water service pipe entering a dwelling through a suspended timber floor? The distributing

Answer 14

No recommended

Question 15

The Water Regulations identifies that it is preferable to connect a cold water distributing pipe into a cistern at which one of the following locations? In the

Answer 15

base of the cistern

Question 16

What name is given to the spacer used when fixing a pillar tap to a stainless steel sink?

Answer 16

Top hat

Question 17

Which one of the following will most likely need to be informed before turning off the cold water supply to a rented house in order to carry out maintenance work?

Answer 17

Tenant

Question 18

When permanently disconnecting the cold water supply, Water Regulations (Byelaws) requires

Answer 18

create any dead legs in the pipework system

Question 19

What type of plumbing fitting is used to make a watertight seal to an open pipe end?

Answer 19

Stop-end.

Question 20

What type of plumbing fitting can be used to control the water pressure supplied to a shower?

Answer 20

Pressure reducing valve

Question 21

A maintenance programme in which float operated valves are re-washered annually regardless of whether the valve is defective is described as

Answer 21

planned preventative maintenane

Question 22

Which one of the following will cause the minimum of disruption when isolating the entire cold water supply to undertake a maintenance job lasting up to 4 hours in a food production factory?

Answer 22

Doing the job outside normal working hours

Question 23

Which one of the following is a replacement part for a pillar tap?

Answer 23

Rubber washer

Question 24

There is no water flow at the cold water outlets in a property. What is the most likely cause of a blockage

Answer 24

Fully blocked line strainer

Question 25

defective double check valve sited inside the property that is supplying an hose union bib tap can be repaired by

Answer 25

replacing the hose union tap with one that contains a double check valve

Question 26

replacing the hose union tap with one that contains a double check valve

Answer 26

replacing the hose union tap with one that contains a double check valve

Question 27

A plumber is most likely to be required to complete a maintenance record for a cold water system when working in which one of the following types of property?

Answer 27

Food production factory

Question 28

Food production factory

Answer 28

Food production factory

Question 29

The re-washering of a tap fails to prevent dripping at its outlet, which one of the following may overcome the problem?

Answer 29

Re-cutting the worn tap seat

Question 30

Which of the following is considered a reliable underground water source?

Answer 30

Artesian wells

Question 31

What makes water “plumbo-solvent”?

Answer 31

Soft water with added CO2

Question 32

What is the primary purpose of flocculation in water treatment?

Answer 32

To remove colour and turbidity

Question 33

Which system supplies water directly to all outlets without storage?

Answer 33

Direct cold water system

Question 34

What level of chlorine is typically added during disinfection?

Answer 34

Less than 1 mg/L