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-4 section-3

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

The specific speed of turbine is defined as the speed of a unit

A) Of such a size that it delivers unit discharge at unit head B) Of such a size that it delivers unit discharge at unit power C) Of such a size that it requires unit power per unit head D) Of such a size that it produces unit horse power with unit head

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Answer & Solution

Answer: Option D

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The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece and H = Height of liquid above the mouthpiece)

A) $$0.855{\text{a}}\sqrt {2{\text{gH}}} $$ B) $$1.855{\text{aH}}\sqrt {2{\text{g}}} $$ C) $$1.585{\text{a}}\sqrt {2{\text{gH}}} $$ D) $$5.85{\text{aH}}\sqrt {2{\text{g}}} $$

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Answer & Solution

Answer: Option A

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When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece and H = Height of liquid above the mouthpiece)

A) $$0.5{\text{a}}\sqrt {2{\text{gH}}} $$ B) $$0.707{\text{a}}\sqrt {2{\text{gH}}} $$ C) $$0.855{\text{a}}\sqrt {2{\text{gH}}} $$ D) $${\text{a}}\sqrt {2{\text{gH}}} $$

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Answer & Solution

Answer: Option A

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A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

A) Equal to B) Less than C) More than D) None of these

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Answer & Solution

Answer: Option B

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A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

A) Equal to B) Less than C) More than D) None of these

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Answer & Solution

Answer: Option C

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Braking jet in an impulse turbine is used

A) To break the jet of water B) To bring the runner to rest in a short time C) To change the direction of runner D) None of these

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Answer & Solution

Answer: Option B

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Rotameter is a device used to measure

A) Absolute pressure B) Velocity of fluid C) Flow D) Rotation

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Answer & Solution

Answer: Option C

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In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

A) Less than B) More than C) Equal to D) None of these

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Answer & Solution

Answer: Option A

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In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

A) Less than B) More than C) Equal to D) None of these

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Answer & Solution

Answer: Option A

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Choose the wrong statement

A) Fluids are capable of flowing B) Fluids conform to the shape of the containing vessels C) When in equilibrium, fluids cannot sustain tangential forces D) When in equilibrium, fluids can sustain shear forces

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Answer & Solution

Answer: Option D

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

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering