1. Describe the procedure to determine the coefficient of discharge of venturimeter with required derivation.
2. Describe the procedure to determine the friction factor through a pipe.
It works better if you answer #2 first.
Stick your finger in a pipe and get the friction going. (#2) Then wait for a discharge (#1).
I would like to help you, but even before I got old, I was not in that field or that smart.