Fluid Mechanics MCQs
Practice free Fluid Mechanics multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 815 questions — no login required.
Question 361hard
In case of a rotameter, the density of the float material is __________ that of the liquid it replaces.
Question 362hard
In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.
Question 363easy
Which of the following has the maximum compression ratio?
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Question 364hard
Stoke's law is valid, when the particle Reynolds number is
Question 365hard
Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the
Question 366medium
Foot valve provided in the pump is a __________ valve.
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Question 367hard
A Pitot tube indicates 5 cm of water (manometer) when it is being used for measuring velocity of air. The velocity of air in m/sec is
Question 368hard
For flow through an orifice from a reservoir, the actual velocity at the vena contracta is given by
Question 369hard
In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is