Plumbing Book 1 Scientific Principles

A cold water storage cistern contains 250 litres of water when filled to its working capacity. If the base of the cistern measures 600mm x 1200mm, what pressure will be exerted by the cistern on the base beneath it?

• 1765 N/m2
• 2542 N/m2
• 3406 N/m2
• 3740 N/m2

Which of the following measurements is a base SI unit?

• kg
• m/s
• m2
• l/s

Which of the following components is manufactured from pure metal?

• 22mm end feed elbow
• Double panel, single convector, welded seam radiator
• Lead-free solder
• 15mm type A compression coupling

Which of the following statements describes the ductility of a material?

• Its ability to conduct heat
• Its ability to resist atmospheric corrosion
• Its ability to return to its original shape once released from tension
• Its ability to be stretched without breaking

If 0.150 m3 of water were heated beyond its boiling point, what volume of steam would be produced?

• 0.150 m3
• 150 m3
• 0.240 m3
• 240 m3

What is the unit of heat?

• Joule
• Watt
• Kelvin
• Ampere

What size earthing cable should be used to bond gas and water mains pipework?

• 4 mm2
• 10 mm2
• 6 mm2
• 8 mm2

When different materials are present together in a system of pipework, which of the following types of corrosion is likely to occur?

• Electrolytic
• Erosion
• Oxidic
• Atmospheric

In an old hot water system that does not use a pump, how is heat transferred from boiler to the cylinder?

• Impulse
• Conduction
• Radiation
• Convection

How does water grip to the side of a beaker or pipe?

• Adhesion
• Gravity
• Cohesion
• Convection