Hot Water 2

What is the minimum size of hot water pipework from a small combination boiler in a domestic property?

• 15mm
• 50mm
• 150mm
• 25mm

Which one of the following can be fitted to a hot water storage cylinder to provide protection against type 1 pitting corrosion?

• Sacrificial anode.
• Pressure reducing valve.
• Pressure relief valve
• Jam sandwich 

What type of hot water storage cylinder is shown

• Double feed indirect cylinder with coil
• Direct Cylinder 
• Double feed indirect cylinder with annulus
• Combination cylinder

A shower pump should normally be sat on

• anti-vibration mountings
• anti-slip mats.
• a timber floor directly
• a solid floor directly

Which section of pipework is missing from  a diagram of a hot water system?

• Primary open vent pipe
• Secondary open vent 
• Primary cold feed 
• Secondary cold feed pipe.

A low pressure manual shower mixer valve must be supplied with

• cold water from the supply pipe and hot water from storage
• hot and cold water from storage
• hot and cold water from the supply pipe
• hot water from the supply pipe and cold water from storage

Which one of the following should be informed before turning off the hot water supply to a rented house in order to carry out maintenance work?

• Landlord.
• Tenant.
• Water inspector
• Building control officer

Which one of the following actions is part of the industry recognised procedure for the safe electrical isolation of a shower pump?

• Fix and test the fuse.
• Touch the bare wires with your tongue
• Turn the switch ‘on’ at the fused connection unit.
• Test the instrument on a known ‘live’ supply.

Which one of the following details a part that may be replaced inside an electric immersion heater?

• Heater element
• Cartridge fuse.
• Thermostat.
• Miniature circuit breaker

A replacement part number for a flow switch to a shower pump can be found from the

• pump manufacturer instructions 
• local water company
• building control body
• local library