UPSC Civil Service Exam Questions - Engineering

Q1:

Which one of the following pairs relating to flumes carrying open channel flow is correctly matched ?

A N-modular flume....Flow is unaffected by drowning

B Venturi flume....Standing wave forms at the throat

C Venturi flume....Flow at the throat is at less than critical velocity

D Standing wave flume....Hump is not provided at the throat

ANS:C - Venturi flume....Flow at the throat is at less than critical velocity

Can you please explain me?