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Kisii National Polytechnic: Claft Certificate in Plumbing

The document is a practice exam for a plumbing certificate. It contains 8 questions testing knowledge of plumbing systems, tools, materials, and processes. The questions cover topics like waste and soil appliances, water treatment processes, plumbing diagrams, maintenance practices, and drainage systems. Students are instructed to answer 5 of the 8 questions on the exam paper within the allotted time of 2 1/2 hours.

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lydiah kerubo
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1K views2 pages

Kisii National Polytechnic: Claft Certificate in Plumbing

The document is a practice exam for a plumbing certificate. It contains 8 questions testing knowledge of plumbing systems, tools, materials, and processes. The questions cover topics like waste and soil appliances, water treatment processes, plumbing diagrams, maintenance practices, and drainage systems. Students are instructed to answer 5 of the 8 questions on the exam paper within the allotted time of 2 1/2 hours.

Uploaded by

lydiah kerubo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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KISII NATIONAL POLYTECHNIC

CLAFT CERTIFICATE IN PLUMBING


PLS21
TIME 2 1/2 HRS
TRADE THEORY
INSTRUCTIONS
 Answer any 5 questions on this paper
 Do not write on a question paper

1.
a) List 6 waste appliances (6mks)
b) Name 4 soil fittings (4mks)
(c) Explain the following processes of water treatment (6mks)
I. Sedimentation
II. Filtration
III. Chlorination
(d) State the composition of each of the following alloys (4mks)
i. Solder
ii. Bronze
2. (a) sketch a well labelled section through a pressure filter in water treatment, explain how it works and
state it’s two advantages (10mks)
(b) State TEN principles to be considered when installing single stack system (10mks)
(b) Draw and label an indirect cold water supply system (8mks)
(C)Name two awareness measures of preventing accidents (2mks)
3. (a) Sketch a labeled single diagram or a dual pipe system (10mks)
(b) Describe three maintenance practice of tools (10mks)
4. (a) With aid of a well labeled diagram draw the ground water source (10mks)
(b) State four types of fire extinguishers (4mks)
(c) State four examples of taps (4mks)
(d) Name two impurities in domestic water (4mks)
5. (a) Start the three method of pending water pipes (3mks)
(b) Explain the functions of a ball valve in a water supply system (3mks)
(c) Differentiate a waste appliance from a soil appliance (5mks)
(d) With the aid of a well labeled diagram draw the rain cycle and explain (10mks)
6. (a) State 10 principles to be considered when installing a single stack system (10mks)
(b) Distinguish between ferrous and non-ferrous metals and state two examples in each (4mks)
(c) State four types of a ball valve (4mks)
(d) State four heat treatment processes (2mks)
7. (a) By means of a labeled sketch illustrate the method used to connect pipes to duplicate cold water
storage tanks given that either system can be isolated without affecting the water supply (7mks)
(b) State the three sources of water (3mks)
8. (a) Sketch the followings tools used in plumbing (6mks)
i. Pipe wrench
ii. Scriber
(b) State three examples of tools in each of the following (12mks)
I. Cutting tools
II. Forming tools
III. Fastening tools
IV. Assembling tools
(b) State two systems of above ground drainage (2mks)

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