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UPSC Civil Service Exam Questions - Engineering

Q1:

The lost time due to starting delay on a traffic signal is noted to be 3s, the actual green time is 25s and yellow time is 3s. How much is the effective green time ?

A 31s

B 28s

C 25s

D 22s

ANS:C - 25s

g = G+A-startatup loss.
= 25+3-3,
= 25.