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1. Which of the following pipes, each measuring 6m in length, will offer the greatest resistance to the flow of water?
2. Conduction occurs by:
3. Which of the following materials is the best conductor of heat?
4. What would the fuse size be for a domestic appliance that has a power rating of 3kW?
5. The limescale build-up in systems is caused by:
6. What has a sinusoidal wave form?
7. On an incoming mains, which of the following would have the lowest pressure?
8. What is the intensity of pressure acting at the base of a 7m long pipe, which has a head height of 3 meters (the cistern at the head of this pipe measures 500mm x 500mm x 500mm)?
9. With a downward pressure of 100kPa and a head of 10m, what would be the approximate pressure in bar?
10. Which of the following values reflects the pH value for pure water?
11. What would an anti-capillary groove in a lead weathering stop?
12. If a customer painted their central heating pipework, what would that protect it from?
13. The build-up of limescale in a hot water system could be noticed by:
14. On an incoming mains, which of the following would have the lowest pressure?
15. Match the property with the statement – Elasticity
16. Which type of plastic is used for the under ground incoming supply pipe for houses ?
17. Match the property with the statement – Malleability
18. Match the property with the statement – Temper
19. Which year is associated with the Water Supply ( water fittings) Regulations
20. Out of Mild Steel, Cast Iron, Copper & Concrete – Mild Steel has:
21. Which type of plastic is used for waste pipes ?
22. Out of Mild Steel, Cast Iron, Copper & Concrete – Cast Iron has
23. Match the property with the statement – Thermal Expansion
24. Which type of plastic can not be re-molded time and time again ?
25. What is the relative density of water ?
26. If a 1m³ of water has a relative density of 1 and weights 1000KG how much would a 1m³ block of mild steel weigh with a relative density of 7.7 ?
27. In which direction is the force in a liquid ?
28. In a plumbing system full of water the pressure is the highest at ?
29. Electrolytic action is caused when :
30. In reference to electrolyte action there are 2 metals, one of the metals is referred to as the cathode which is a positive . What is the other metal referred to as ?
31. Which one of the following factors has the most influence on the frictional resistance within a cold water pipework system ?
32. The energy used to heat 1kg of water by 2ºC is 8.372kJ. The specific heat value for water is:
33. In relation to Cohesion which is the correct statement ?
34. What is static pressure defined as ?
35. When Rainfall lands on Salt (calcium sulphate) what type of water will it create ?
36. Match the following statement with the term – Conduction
37. A brass fitting is an alloy, what 2 metals make up brass ?
38. How do simple machines work ? Pick the statement that best describes them.
39. Using the power triangle, What is the fuse rating for a circuit 230V and a power rating of 690W?
40. Which is the correct equation to find resistance?
