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communicating with others. Design a system which can be used by them for
effective communication.

b) Sometimes, street lights are not switched on when it is dark and remain switched
on even after sunrise. This leads to unnecessary energy loss. Design a solution for
this problem.

Design a solar cooking unit for “X’ where ‘X’ is (1)085೮ of assembly, (ii)ease of
maintenance, (iii)reliability, (iv)ease of logistics (transportation), (v) safety

a) Prepare a feedback questionnaire for a newly designed biogas plant implemented
in your locality

b) Suggest and explain any 2 methods to make your wrist watch more ergonomic.

நக்கக்‌

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