Hydraulics And Fluid Mechanics MCQ Questions & Answers

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-8 section-2

Each section contains 100 MCQs on Hydraulics and Fluid Mechanics in ME .

Specific speed for reaction turbines ranges from

A) 0 to 4.5 B) 10 to 100 C) 80 to 200 D) 250 to 300

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Resultant pressure of the liquid in the case of an immersed body acts through

A) Centre of gravity B) Centre of pressure C) Metacentre D) Centre of buoyancy

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Answer & Solution

Answer: Option B

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Buoyant force is

A) The resultant force acting on a floating body B) The resultant force on a body due to the fluid surrounding it C) Equal to the volume of liquid displaced D) The force necessary to maintain equilibrium of a submerged body

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Answer & Solution

Answer: Option B

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The ratio of the inertia force to the elastic force is called

A) Reynold's number B) Froude's number C) Weber's number D) Mach number

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Answer & Solution

Answer: Option D

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The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

A) Half the depth B) Half the breadth C) Twice the depth D) Twice the breadth

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Answer & Solution

Answer: Option A

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Specific weight of sea water is more that of pure water because it contains

A) Dissolved air B) Dissolved salt C) Suspended matter D) All of the above

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Answer & Solution

Answer: Option D

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The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

A) Sum B) Difference C) Product D) None of these

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Answer & Solution

Answer: Option B

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In order to avoid cavitation in centrifugal pumps

A) The suction pressure should be high B) The delivery pressure should be high C) The suction pressure should be low D) The delivery pressure should be low

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Answer & Solution

Answer: Option A

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The Francis formula for the discharge over Cipoletti weir is

A) $$1.84\,{\text{L}}{{\text{H}}^{\frac{1}{2}}}$$ B) $$1.84\,{\text{LH}}$$ C) $$1.84\,{\text{L}}{{\text{H}}^{\frac{3}{2}}}$$ D) $$1.84\,{\text{L}}{{\text{H}}^{\frac{5}{2}}}$$

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Answer & Solution

Answer: Option C

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The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

A) 0.34 times B) 0.67 times C) 0.81 times D) 0.95 times

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Answer & Solution

Answer: Option C

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Hydraulics And Fluid Mechanics MCQ Questions &amp; Answers | Mechanical Engineering

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering