Hydraulics And Fluid Mechanics MCQ Questions & Answers

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-10 section-5

The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.

A) The bodies A and B have equal stability B) The body A is more stable than body B C) The body B is more stable than body A D) The bodies A and B are unstable

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Answer & Solution

Answer: Option C

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Kinematic viscosity is equal to

A) $$\frac{{{\text{Dynamic viscosity}}}}{{{\text{density}}}}$$ B) $${\text{Dynamic viscosity}} \times {\text{Density}}$$ C) $$\frac{{{\text{Density}}}}{{{\text{Dynamic viscosity}}}}$$ D) $$\frac{1}{{{\text{Dynamic viscosity}}}} \times {\text{Density}}$$

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Answer: Option A

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A fluid having no viscosity is known as

A) Real fluid B) Ideal fluid C) Newtonian fluid D) Non-Newtonian fluid

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Answer: Option B

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The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

A) One-half B) One-third C) Two-third D) None of these

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Answer & Solution

Answer: Option B

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The total head of a liquid particle in motion is equal to

A) Pressure head + kinetic head + potential head B) Pressure head - (kinetic head + potential head) C) Potential head - (pressure head + kinetic head) D) Kinetic head - (pressure head + potential head)

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Answer: Option A

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The total energy of a liquid particle in motion is equal to

A) Pressure energy + kinetic energy + potential energy B) Pressure energy - (kinetic energy + potential energy) C) Potential energy - (pressure energy + kinetic energy D) Kinetic energy - (pressure energy + potential energy)

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Answer: Option A

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The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

A) 40% B) 50% C) 60% D) 80%

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Answer: Option B

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The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

A) $$\frac{{\mu {\pi ^3}{{\text{N}}^2}{{\text{R}}^2}}}{{1800{\text{t}}}}$$ B) $$\frac{{\mu {\pi ^3}{{\text{N}}^2}{{\text{R}}^4}}}{{1800{\text{t}}}}$$ C) $$\frac{{\mu {\pi ^3}{{\text{N}}^2}{{\text{R}}^2}}}{{3600{\text{t}}}}$$ D) $$\frac{{\mu {\pi ^3}{{\text{N}}^2}{{\text{R}}^4}}}{{3600{\text{t}}}}$$

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Answer & Solution

Answer: Option B

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The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

A) $${\left( {\frac{{\text{q}}}{{\text{g}}}} \right)^{\frac{1}{2}}}$$ B) $${\left( {\frac{{{{\text{q}}^2}}}{{\text{g}}}} \right)^{\frac{1}{3}}}$$ C) $${\left( {\frac{{{{\text{q}}^3}}}{{\text{g}}}} \right)^{\frac{1}{4}}}$$ D) $${\left( {\frac{{{{\text{q}}^4}}}{{\text{g}}}} \right)^{\frac{1}{5}}}$$

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Answer & Solution

Answer: Option B

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100

The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the

A) Pressure head B) Velocity head C) Pressure head + velocity head D) Pressure head - velocity head

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Answer & Solution

Answer: Option A

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

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering