Level 6 Graduate Diploma in Engineering (9210-01) - City & Guilds

Unit 110 Water and wastewater engineering
Assessment Criteria
Outcome 1 Identify and understand the principles and processes
involved in water supply systems
The learner can:
1. Describe water sanitation and health.
2. Describe sources of water for water supply:
a. surface water
b. ground water: pervious and impervious stratum
c. rainwater harvesting
3. Forecast demands for water supply systems:
a. average per capita water consumption
b. peak domestic water demand
c. industrial, commercial and agricultural demands
d. design periods
e. collection, storage, transmission, treatment and distribution works
4. Recognise the characteristics of surface water and ground water intake structures:
a. yields of bored and drilled wells
b. feasible discharges
5. Select suitable pumps from different types (displacement, centrifugal, airlift, hydraulic):
a. capacities and efficiencies
b. operational characteristics
c. advantages and disadvantages
6. Assess different types of transmission devices and their effects including strength
considerations.
7. Design pipe distribution systems:
a. Tree /Dead end systems
b. Cycle / ring systems
c. Pipe sizes: Hazen William formula etc.
d. Pipe material and types
e. Joints: Bell spigot, flanged, mechanical, plastic
f. Characteristics and maintenance of different types of valves and water meters
8. Recognise types of distribution reservoirs.
9. Analyse storage and demand.
10. Assess the process of water treatment:
a. pre-treatment, screening types
b. aeration: types and characteristics of aerators
c. sedimentation: types and dimension estimates
d. coagulation
e. filtration: types and characteristics
f. disinfection methods: chlorination testing and points of applications
11. Describe water quality standards and methods of analysis:
a. Chemical reactions
b. ionic equilibria
c. buffering
d. pH
Level 6 Graduate Diploma in Engineering (9210-01) 61