# 1000+ Hydraulics and Fluid Mechanics MCQ Questions and Answers - 1

Question: 1

A rotameter is a device used to measure

(A) flow of fluids

(B) vortex flow

(C) velocity of gauges

(D) velocity of fluid in pipes

Ans: A

flow of fluids

Question: 2

Pascal’s law states that pressure at a point is equal in all directions

(A) in a turbulent flow

(B) in a laminar flow

(C) in a fluid at rest

(D) in a liquid at rest

Ans: C

in a fluid at rest

Question: 3

The purpose of surge tank in a pipeline is to

(A) to relieve the pressure due to water hammer

(B) prevent occurrence of hydraulic pump

(C) minimize friction losses in pipe

(D) smoothen the flow of water

Ans: A

to relieve the pressure due to water hammer

Question: 4

Bernoulli’s theorem deals with the principle of conservation of

(A) mass

(B) energy

(C) force

(D) momentum

Ans: B

energy

Question: 5

A type of flow in which the fluid particles while moving in the direction of flow rotate about their mass centre, is known as

(A) turbulent flow

(B) laminar flow

(C) uniform flow