Q1: The discharge through a venturimeter depends upon

ANS:A - pressure drop only.

The discharge through a venturi meter depends on several factors, not just one. These factors include:

1. Pressure Drop: The venturi meter works based on the principle of Bernoulli's equation, where the pressure difference between the throat and the inlet (or the outlet) is related to the velocity of the fluid. The greater the pressure drop across the venturi meter, the higher the flow rate (discharge).
2. Coefficient of Contraction: This coefficient accounts for the reduction in cross-sectional area at the throat compared to the inlet of the venturi meter. The discharge through the venturi meter is influenced by how effectively the fluid streamlines contract at the entrance to the throat.
3. Co-efficient of Discharge: This factor reflects the efficiency of the venturi meter in accurately measuring the flow rate. It considers losses due to friction and imperfections in the meter's design.
4. Orientation: The orientation of the venturi meter can affect the accuracy of its measurements, but it does not directly determine the discharge. Proper installation and alignment are crucial for reliable readings, but they do not directly affect the flow rate.