Fluid Mechanics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Fluid Mechanics, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Fluid Mechanics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Fluid Mechanics mcq questions that explore various aspects of Fluid Mechanics problems. Each MCQ is crafted to challenge your understanding of Fluid Mechanics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Fluid Mechanics MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Fluid Mechanics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Fluid Mechanics knowledge to the test? Let's get started with our carefully curated MCQs!

Fluid Mechanics MCQs | Page 73 of 77

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Q721.
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water)

a.

39.6y

b.

48y

c.

49.2y

d.

58y

Discuss
Answer: (b).48y
Q722.
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 ฮผm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :

ฮ” P/L = 375 x 10³ Vโ‚’โ‚˜ + 10.94 x 10โถ V² โ‚’โ‚˜ (SI units)

If water is to be used as the fluidising medium, the minimum fluidisation velocity, Vโ‚’โ‚˜ is

a.

12 mm/s

b.

16 mm/s

c.

24 mm/s

d.

28 mm/s

Discuss
Answer: (b).16 mm/s
Q723.
One dimensional flow implies

a.

flow in a straight line.

b.

steady uniform flow.

c.

unsteady uniform flow.

d.

a flow which does not account for changes in transverse direction.

Discuss
Answer: (d).a flow which does not account for changes in transverse direction.
Q724.
The unit of velocity head is

a.

ft-lb/sec

b.

ft-lb/ft³

c.

ft-lbf/lb

d.

ft-lbf/sec.

Discuss
Answer: (c).ft-lbf/lb
Q725.
Which of the following properties of a fluid is responsible for offering resistance to shear ?

a.

Surface tension.

b.

Viscosity.

c.

Specific gravity.

d.

All (a), (b), and (c).

Discuss
Answer: (b).Viscosity.
Q726.
Erosion and pits formation on the impeller of a centrifugal pump may be due to

a.

cavitation.

b.

low speed of impeller.

c.

its operation with delivery valve closed for considerable time after starting the pump.

d.

off centering of pump with motor.

Discuss
Answer: (a).cavitation.
Q727.
The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.

a.

hyperbola

b.

parabola

c.

semi-circle

d.

semi-ellipse

Discuss
Answer: (b).parabola
Q728.
The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.

a.

inlet tip of a blade curves in a direction opposite to that

b.

outlet tip of a blade curves in a direction opposite to that

c.

inlet tip of a blade is towards the direction

d.

outlet tip of a blade is towards the direction

Discuss
Answer: (d).outlet tip of a blade is towards the direction
Q729.
For the same terminal conditions and fitting size, the least friction loss is incurred in a/an

a.

T-joint

b.

union

c.

45° elbow

d.

90° bend

Discuss
Answer: (b).union
Q730.
A floating/submerged body is always stable, if its centre of gravity

a.

lies above its centre of buoyancy.

b.

and centre of buoyancy coincide.

c.

lies below its centre of buoyancy.

d.

lies above its meta centre.

Discuss
Answer: (c).lies below its centre of buoyancy.
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