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 36 of 77

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Q351.
Delivery of insufficient quantity of liquid by a pump may be caused by

a.

air leak in the inlet

b.

low rpm

c.

too high a lift

d.

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

Discuss
Answer: (d).all (a), (b) and (c)
Q352.
Fluid resistance to shear depends upon its

a.

rate of transfer of molecular momentum.

b.

cohesion.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q353.
Pick out the wrong statement.

a.

In a static mass of liquid, the pressure at a point is the same for all liquids.

b.

Pressure decreases exponentially with elevation in an isothermal atmosphere.

c.

Atmospheric pressure = absolute pressure-gage pressure.

d.

As per Pascal's law, the pressure at a point in a static or uniformly moving fluid is equal in all directions.

Discuss
Answer: (a).In a static mass of liquid, the pressure at a point is the same for all liquids.
Q354.
The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is

a.

parabolic

b.

flat

c.

flat near the wall and parabolic in the middle

d.

parabolic near the wall and flat in the middle.

Discuss
Answer: (d).parabolic near the wall and flat in the middle.
Q355.
Fanning friction factor for laminar flow of fluid in a circular pipe is

a.

not a function of the roughness of pipe wall.

b.

inversely proportional to Reynolds number.

c.

both (a) & (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) & (b).
Q356.
Mach number is the ratio of the speed of the

a.

fluid to that of the light.

b.

light to that of the fluid.

c.

fluid to that of the sound.

d.

sound to that of the fluid.

Discuss
Answer: (c).fluid to that of the sound.
Q357.
A piezometer opening measures the __________ fluid pressure.

a.

static

b.

undisturbed

c.

total

d.

dynamic

Discuss
Answer: (b).undisturbed
Q358.
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
Q359.
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
Q360.
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
Page 36 of 77