L3 YR2 Revision 1 (Cold 1)

The main advantage of using a sectional storage cistern is that it can be ...

• Lightweight

• No supports required

• Tailored to fit any space

• Installed in a basement

The warning pipe of a large CWSC must discharge

• Into a rainwater collection header

• So as not to create a nuisance

• In a noticeable place

• Directly into a gutter

Which of the following would NOT be an action taken by a plumber to reduce water hammer

• Fit equilibrium float operated valves

• Fit flow restricters in the supply to float operated valves

• Reduce flow by turning down supply through consumers stop tap

• Ensure pipework is adequately secured

Which one of the following would be most appropriate to a potential client when tendering for work.

• Bill of Quantities and sketch

• Quotation and scale drawing

• Specification and Bill of Quantities

• Specification and scale drawing

When undertaking fault diagnosis work on cold water system component, which one of the following sources of information should be considered first?

• British standards

• Codes of practice

• Manufacturers data

• Customer

What procedure should be used to verify the correct operation of a cold water storage cistern float switch?

• Check amps at pumps

• Electrically bypass the float switch

• Manually operate the float arm

• Check voltage at switch

Which one of the following components must also be removed when replacing the packing gland on a long neck pillar tap?

• Tap head

• Circlip

• Top hat washer

• Jumper plate

The parts of a verifiable check valve which are used to help diagnose any faults which may exist on the valve are:

• D.O.C.

• Test points

• Check valve

• Olive

An accumulation of white powder on the surface of a brass fitting, is most likely to be an indication of:

• Blue water corrosion

• Chemical corrosion

• Electrolytic action

• PH water

Which one of the following items of information should be contained on a cold water commissioning record?

• Discharge flow rates

• Air temperatures

• Length of Secondary return

• Number of workers