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 75 of 77

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Q741.
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
Q742.
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.
Q743.
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
Q744.
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
Q745.
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm 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 :

Δ P/L = 375 x 10³ Vₒₘ + 10.94 x 10⁶ V² ₒₘ (SI units)

If water is to be used as the fluidising medium, the minimum fluidisation velocity, Vₒₘ is

a.

12 mm/s

b.

16 mm/s

c.

24 mm/s

d.

28 mm/s

Discuss
Answer: (b).16 mm/s
Q746.
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.
Q747.
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
Q748.
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.
Q749.
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.
Q750.
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
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