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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-9 section-3

Each section contains 100 MCQs on Hydraulics and Fluid Mechanics in ME .
81
The volume of a fluid __________ as the pressure increases.
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Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
82
Bulk modulus of a fluid __________ as the pressure increases.
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Answer & Solution
Answer: Option C
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83
The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.
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Answer & Solution
Answer: Option C
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84
When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
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Answer & Solution
Answer: Option C
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85
Working principle of dead weight pressure gauge tester is based on
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Answer & Solution
Answer: Option A
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86
The liquid used in manometers should have
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Answer & Solution
Answer: Option B
Solution:
Manometers are devices used for measuring pressure, typically in fluids. The liquid used in manometers should have high density.
This is because higher density liquids are less affected by small changes in pressure, providing more accurate measurements.

Option A: Low density
Low density liquids would be more sensitive to pressure changes, which could lead to less accurate readings.

Option C: Low surface tension
Surface tension is not a critical factor in the selection of the liquid for a manometer. It doesn't directly impact the accuracy of pressure measurements.

Option D: High surface tension
High surface tension liquids tend to form menisci in narrow tubes, which could affect the accuracy of pressure measurements in a manometer.

Therefore, the correct answer is option B: High density.
87
The stress-strain relation of the Newtonian fluid is
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Answer & Solution
Answer: Option A
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88
For pipes, laminar flow occurs when Reynolds number is
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Answer: Option A
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89
For pipes, turbulent flow occurs when Reynolds number is
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Answer: Option C
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90
The velocity corresponding to Reynold number of 2800, is called
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Answer: Option D
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