Craft Certificate in Plumbing: Plumbing Craft Theory past paper March 2023 Answers

Answers for Craft Certificate in Plumbing: Plumbing Craft Theory past paper March 2023

Course Name:  Plumbing
Also Done By:
na
Course Level:  Craft Certificate
Sub Level:       Module I
Course Unit:   Plumbing Craft Theory
Exam body:    KNEC
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1. Define 'heat treatment' ()
2. State four objectives achieved by heat treatment ()
3. Explain the function of each of the following devices: (i) float switch; (ii) safety valve; (iii) air valve ()
4. Sketch and label a one pipe system of the above ground drainage ()
5. Outline four causes of a water pump failure ()
6. Sketch and label a petrol interceptor ()
7. Outline four faults in arc-welded joints ()
8. Explain the following water treatment processes: (i) removal of hardness using base-exchange; (ii) removal of suspended matter in water; (iii) removal of odour in water ()
9. Sketch and label an indirect hot water system in a domestic dwelling ()
10. Outline two safety precautions observed in a plumbing workshop in relation to each of the following: (i) use of electric machines; (ii) floor layout; (iii) personal protection equipment ()
11. Illustrate two situations through which a drainage trap loses water seal due to siphonage ()
12. State three design principles of the below ground drainage ()
13. Sketch the following tools used in plumbing: (i) pipe reamer; (ii) pipe vice ()
14. Sketch and label a direct cold water supply System in a domestic dwelling ()
15. Sketch and label the connection of waste water pipe from a wash hand basin fixed to an external wall on the ground floor to a drain pipe ()
16. List four sources of water used in fire fighting ()
17. Sketch the following pipe supports:(8 marks) (i)build-in clip; (ii)saddle clip. ()
18. State four uses of flux ()
19. Explain each of the following tests carried out on newly laid drains: (ii)alignment test; (ii)obstruction test; (iii)smoke test ()
20. State two functions of a stop cock ()
21. State four advantages of thermal insulation ()
22. Sketch the dry riser firefighting system and explain its operation ()
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