Question

A fluid flows steadily from left to right in the pipe shown. The diameter of the pipe is less at point 2 then at point 1, and the fluid density is constant throughout the pipe. How do the velocity of flow and the pressure at points 1 and 2 compare?

Velocity	Pressure
(A) v1 < v2	p1 = p2
(B) v1 < v2	p1 > p2
(C) v1 = v2	p1 < p2
(D) v1 > v2	p1 = p2
(E) v1 > v2	p1 > p2

Answer 1

Correct option (B) v₁ < v₂ p₁ > p₂

Based on continuity, less area means more speed and based on Bernoulli, more speed means less pressure.