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Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

Learn Hydraulics And Fluid Mechanics MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Hydraulics And Fluid Mechanics MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-7 section-5

Each section contains 100 MCQs on Hydraulics and Fluid Mechanics in ME .
61
A flow through a long pipe at constant rate is called
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
62
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
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Answer: Option B
No explanation is given for this question. Let's Discuss on Board
63
Head developed by a centrifugal pump is
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Answer: Option C
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64
Delivery head of a centrifugal pump is
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Answer: Option C
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65
Discharge of a centrifugal pump is
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Answer: Option D
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66
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
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Answer: Option B
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67
The flow in a pipe or channel is said to be uniform when
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Answer: Option A
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68
Euler's number is the ratio of __________ force to pressure force.
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Answer: Option A
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69
The property of fluid by virtue of which it offers resistance to shear is called
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Answer & Solution
Answer: Option D
Solution:
Viscosity is a fluid's resistance to flow.
Think of it like this: honey is more viscous than water because it's thicker and flows slower.
This "thickness" comes from the internal friction within the fluid as it's being sheared (deformed).
So, the property of a fluid that resists shear is its viscosity.

Now let's look at the other options:

(A) Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible.
It's what allows some insects to walk on water.
It's not directly related to resistance to shear flow.

(B) Adhesion is the tendency of dissimilar particles or surfaces to cling to one another.
For example, water sticking to the side of a glass.
This is about attraction between different materials, not the fluid's internal resistance to shear.

(D) None of the above is incorrect because viscosity *is* the property we're looking for.

In summary: Viscosity is the fluid property that resists shear.
70
A hydraulic coupling belongs to the category of
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Answer & Solution
Answer: Option C
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