wss 6pw questionnaire

8/12/2019 WSS 6Pw Questionnaire

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MINEDUC

ADET/TEVSA

P.O.BOX 3830 KIGALI-RWANDA

ADET/TEVSA-INTER-SCHOOL EXAMINATIONS

SECOND-TERM-2013

SUBJECT: WATER SUPPLY AND SANITATION (WSS)

CLASS: 6th

PUBLIC WORKS

LEVEL: PUBLIC WORKS

WEIGHT: 100Marks

DURATION: 3HOURS

INSTRUCTIONS

This examination paper containsTHREE SECTIONS:

Attempt allQUESTIONS of SECTION A

AttemptANY THREE (3) QUESTIONS of SECTION B and

AttemptANY ONE (1) QUESTION of SECTION C


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Attempt ALL QUESTIONS of SECTION A: 55marks

1. With help of sketch, give at least three common types of erosion that maydamage highway and its elements. (5marks)

2. What are the common sources of water to be drained during highwayconstruction? (3marks)3. How can the different sources of water can damage road or highway

structure? (5marks)

4. By using a schematic sketch, show the different elements used to drainwater for highway located in hill side regions (8marks)

5. Propose at least four techniques used to reduce erosion on side drain of ahighway located in hillside areas. (4marks)

6.

What are the materials in which a scour check structure is constructed?(5marks)

7. What are the common use of a retaining walls (5marks)8. What do you understand by gabions walls(4marks)9. Give at least five applications of gabion walls in highway construction.

(5marks)

10.By using the rational method, calculate the surface run-off discharge for acatchment area of a zone having run-off coeffient R=0.60, intensity of

rainfall equal to of 30

and the area equal to 20 ha. (5marks)

11.by using a neat sketch , give a typical cross section layers of a flexiblepavement road. (6marks)


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SECTION B: Attempt any THREE (3) questions /30mks

12.Define the following terms: (10 marks)a) Refuge (2mrks)

b) Sewage (2mrk)c) Hauching (2mrks)d) Soffit (2mrk)e) Invert(2mrk)

13.(a) Give at least ten defects as deterioration of highway surface. (6marks)(b) What are the four main objectives of highway maintenance (4marks)

14.Give at least three positive and negative effects of water on unpaved orpaved highway surface. (10marks)

1155..(a) What are the two types of water closer (3mrks)(b) Give at least seven common sanitary fittings used in house drainage

system. (7mrks)

SECTION C: Compulsory question /15mks

16.Give and discus briefly the main categories of road maintenance.

wss 6pw questionnaire

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