Hydraulics And Fluid Mechanics MCQ Questions & Answers

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

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The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

A) $$\frac{{{\text{wa}}\left( {{\text{V}} - {\text{v}}} \right)}}{{2{\text{g}}}}$$ B) $$\frac{{{\text{wa}}\left( {{\text{V}} - {\text{v}}} \right)}}{{\text{g}}}$$ C) $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{2{\text{g}}}}$$ D) $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{\text{g}}}$$

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Answer & Solution

Answer: Option D

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Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

A) Adhesion B) Cohesion C) Viscosity D) Compressibility

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Answer & Solution

Answer: Option A

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The flow in which each liquid particle has a definite path and their paths do not cross each other is called

A) One dimensional flow B) Streamline flow C) Steady flow D) Turbulent flow

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Answer & Solution

Answer: Option B

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In case of flow through parallel pipes,

A) The head loss for all the pipes is same B) The total discharge is equal to the sum of discharges in the various pipes C) The total head loss is the sum of head losses in the various pipes D) Both (A) and (B)

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Answer & Solution

Answer: Option D

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A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

A) 0.25 m³/s B) 0.5 m³/s C) 1.5 m³/s D) 2.5 m³/s

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Answer & Solution

Answer: Option A

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A nozzle placed at the end of a water pipe line discharges water at a

A) Low pressure B) High pressure C) Low velocity D) High velocity

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Answer & Solution

Answer: Option D

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If ‘w’ is the specific weight of liquid and ‘h’ the depth of any point from the surface, then pressure intensity at that point will be

A) h B) wh C) $$\frac{{\text{w}}}{{\text{h}}}$$ D) $$\frac{{\text{h}}}{{\text{w}}}$$

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Answer & Solution

Answer: Option B

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All the terms of energy in Bernoulli's equation have dimension of

A) Energy B) Work C) Mass D) Length

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Answer & Solution

Answer: Option D

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The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

A) $$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {\text{H}}$$ B) $$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {{\text{H}}^{\frac{3}{2}}}$$ C) $$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {{\text{H}}^2}$$ D) $$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {{\text{H}}^{\frac{5}{2}}}$$

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Answer & Solution

Answer: Option D

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If the depth of water in an open channel is less than the critical depth, the flow is called

A) Critical flow B) Turbulent flow C) Tranquil flow D) Torrential flow

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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