Page 1 :
MACHAKOS UNIVERSITY, University Examination 2018/2019, SCHOOL OF ENGINEERING AND TECHNOLOGY, DEPARTMENT OF BUILDING AND CIVIL ENGINEERING, FIRST YEAR FIRST SEMESTER EXAMINATION FOR, ARTISAN IN PLUMBING, PLUMBING TRADE THEORY, DATE: 18/4/2019, , TIME: 11:30 – 2:30 AM, , INSTRUCTIONS:, This paper consists of SIX questions, Answer any FIVE questions, All questions carry equal marks, 1., , a), , List down TWO main sources of water supply hence give TWO examples of, each., , (4 marks), , b), , By use of a neat diagram, show the process of a rain cycle., , (6 marks), , c), , Draw the following plumbing tools;, i) flat file, ii) hacksaw, iii) cold chisel, iv) ball pein hammer, v)tin snips, , 2., , a), , Name FIVE materials used in plumbing works., , b), , Describe the following;, , (10 marks), (5 marks), , i) ferrous metals, i) non-ferrous metals., , (4 marks), , c), , Name THREE classes of galvanized iron (GI)pipes and state the colour code, for each. (6mks), , d), , Name THREE classes of fire and give one example in each case., , Examination Irregularity is punishable by expulsion, , (5 marks), , Page 1 of 2

Page 2 :
3., , a), , List down SIX safety precautions to be observed in a plumbing workshop., (6 marks), , b), , Name and draw THREE joints on sheet metal., , c), , State THREE constituents that causes fire hence draw a fire triangle., , (9 marks), , (5 marks), 4., , By means of a neat sketch, show the installation of a direct cold water supply from the, mains to the storage tank., (20 marks), , 5., , a), , b), , Draw the following joints used in pipe work;, i), , screw joint, , ii), , autogenous welded joint., , (6 marks), , Describe the following;, i) communication pipe, ii) service pipe, , 6., , iii)rising main, , (9 marks), , c), , List down FIVE categories of tools in plumbing., , (5 marks), , a), , State the importance of first aid to a victim., , (4 marks), , b), , List down FOUR simple steps to follow when administering first aid to a, victim., (8 marks), , c), , Name FIVE materials used for pipe work in plumbing., , d), , State the use of the following in a water installation;, i), , gate valve, , ii), , tap., , (5 marks), , (3 marks), , ., , Examination Irregularity is punishable by expulsion, , Page 2 of 2