Question

The velocity of efflux of a liquid through an orific in the bottom of the tank does not depend upon

• A. size of orific
• B. height of liquid
• C. acceleration due to gravity
• D. density of liquid

Answer 1

Answer: (D)

density of liquid

Answer 2

The correct option is (D): density of liquid.
$P _{ o }+\frac{1}{2} \rho_{\text {bottom }} v ^{2}= P _{ o }+\rho_{\text {liquid }} g h$
Velocity of efflux is independent of the size of orifice.
The density of the fluid is actually varying with depth for large heights.
In such scenarios, velocity of efflux depends on the density of the liquid.