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 74 of 77

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Q731.
Pick out the wrong statement:

a.

Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer.

b.

Blowers develop a maximum pressure of 2 atmospheres.

c.

Friction losses in pipe fittings are generally expressed in terms of velocity heads.

d.

Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number.

Discuss
Answer: (c).Friction losses in pipe fittings are generally expressed in terms of velocity heads.
Q732.
Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a

a.

pitot tube

b.

manometer

c.

rotameter

d.

none of these

Discuss
Answer: (a).pitot tube
Q733.
What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)?

a.

0.5

b.

1

c.

1.5

d.

2

Discuss
Answer: (d).2
Q734.
The line traced by a single fluid particle as it moves over a period of time is called __________ line.

a.

stream

b.

path

c.

equipotential

d.

none of these

Discuss
Answer: (b).path
Q735.
The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head.

a.

elevation

b.

velocity

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).velocity
Q736.
A stream tube is that, which has __________ cross-section entirely bounded by stream lines.

a.

a circular

b.

any convenient

c.

a small

d.

a large

Discuss
Answer: (b).any convenient
Q737.
A mixed flow centrifugal pump

a.

employs such an impeller, through which the flow is a combination of radial & axial flow.

b.

mixes the two fluids before pumping them.

c.

pumps the two fluids separately and then mixes them.

d.

employs impellers in both the radial & axial directions.

Discuss
Answer: (a).employs such an impeller, through which the flow is a combination of radial & axial flow.
Q738.
In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.

a.

lower than

b.

higher than

c.

equal to

d.

none of these

Discuss
Answer: (b).higher than
Q739.
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
Q740.
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
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