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 39 of 77

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Q381.
In case of a __________ the energy of flow is considerably decreased downstream of the machine.

a.

blower

b.

turbine

c.

centrifugal pump

d.

centrifugal fan

Discuss
Answer: (b).turbine
Q382.
With increase in the shear rate, the apparent viscosity of pseudoplastic fluids

a.

increases

b.

decreases

c.

remains same

d.

may increase or decrease; depends on the magnitude of shear rate

Discuss
Answer: (b).decreases
Q383.
Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about

a.

0.42

b.

0.62

c.

0.82

d.

0.98

Discuss
Answer: (b).0.62
Q384.
Purpose of hydraulic accumulator is to

a.

ensure intermittant supply of hydraulic pressure.

b.

increase the pressure and store/ accumulate it.

c.

accumulate pressure to increase force.

d.

generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

Discuss
Answer: (d).generate high pressure to operate hydraulic machines like cranes, lifts, presses etc
Q385.
Pick out the wrong statement.

a.

Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces.

b.

A hydrometer used for the determination of specific gravities of liquids works on the principle of buoyant forces.

c.

In case of unsteady fluid flow, the velocity at any given point does not change with time.

d.

Turbulent fluid flow is characterised by the rapid fluctuation of instantaneous pressure & velocity at a point.

Discuss
Answer: (c).In case of unsteady fluid flow, the velocity at any given point does not change with time.
Q386.
Poise is converted into stoke by

a.

multiplying with density (gm/c.c).

b.

dividing by density (gm/c.c).

c.

multiplying with specific gravity.

d.

dividing by specific gravity.

Discuss
Answer: (b).dividing by density (gm/c.c).
Q387.
The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop for __________ fluid.

a.

dilatant

b.

pseudoplastic

c.

Bingham plastic

d.

Newtonion

Discuss
Answer: (a).dilatant
Q388.
Kinetic energy of fluid per unit weight represented by the velocity head is given by

a.

2v²/gc

b.

v²/2gั

c.

ฯv²/gc

d.

ฯ.v²/2gc

Discuss
Answer: (b).v²/2gั
Q389.
At a constant speed of the centrifugal pump, its __________ the impeller diameter.

a.

capacity varies directly with

b.

head varies as the square of

c.

horsepower varies as the cube of

d.

all (a), (b) and (c)

Discuss
Answer: (d).all (a), (b) and (c)
Q390.
The pressure co-efficient is the ratio of pressure forces to __________ forces.

a.

viscous

b.

inertial

c.

gravity

d.

surface tension

Discuss
Answer: (a).viscous
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