Question 4
(a) (i) state the purpose of ball valve in plumbing.
(ii) list four types of ball valve.
(b) Sketch a multi-point storage water heater and label the following parts:
(i) cold water storage cistern;
(ii) boiler.
(c) Explain a circulator heater
Observation
Most of the candidates were able to:
- state the purpose of ball valve in plumbing;
- list four types of ball valve.
However some of them were unable to:
- sketch a multi-point storage water heater and label the following parts:
(i) cold water storage cistern;
(ii) boiler.
- explain a circulator heater
The required response to questions 4. (b) and (c) are given below.
.(b)sketch of a multi-point storage water heater and labelling of:
(c) Explanation of a circulator heater;
A circulator heater is connected to the hot water storage cylinder or tank with a flow and return pipe. The heater may provide the sole means of providing hot water or be used as a booster to a solid fuel boiler.