Phase 2 Multiple Choice Test C

A system of pipework has a static head of 11.6m. What is the pressure acting upon the lowest part of the system?

• 11.6 bar

• 11.6 pascals

• 116,000 pascals

• 10.6 bar

Which of the following examples of pipe installation would result in the best flow rate?

• 3m of 22mm pipework with five elbows

• 3m of 15mm pipework with five elbows

• 3m of 22mm pipework with five pulled bends

• 3m of 15mm pipework with five pulled bends

What charge does a proton carry?

• Positive charge

• Negative charge

• Alternating positive to negative charge

• Neutral charge

How is current correctly defined?

• The number of electrons flowing per second

• The number of neutrons flowing per second

• The difference in electron concentration

• The potential difference within a circuit

To determine the current within a circuit, which calculation is used?

• Watts/Volts

• Watts/Ohms

• Volts/Watts

• Ohms/Volts

Which one of the following types of taps typically requires a single check valve to protect against backflow from cross-connection with fluid category 2 water?

• High neck pillar tap

• Bib tap

• Bi-flow mixer tap

• Mixer tap

A kitchen sink relies on what type of air gap between the spillover level and the tap outlet?

• AUK2

• AUK3

• AG

• AA

What is the minimum head requirement for a gravity fed shower?

• 150mm

• 750mm

• 1,000mm

• 1,150mm

A cold water storage cistern requires a wooden base for support. If the cistern base measures 1,000mm x 800mm, what (minimum) dimension should the wooden base be cut at?

• 1,000mm x 800mm

• 1,150mm x 950mm

• 1,300mm x 1,100mm

• 1,500mm x 1,300mm

After disinfection of a cold water system, it is found that the residual chlorine level is 35ppm. What actions should be taken?

• The system should be drained and flushed with drinking water

• The disinfection process should be repeated to ensure a residual chlorine level no less than 50ppm

• The system should be flushed with an inhibitor

• The disinfection process should be repeated to ensure a residual chlorine level no less than 70ppm