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-8 section-3

The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

A) $$\frac{{{I_{\text{G}}}}}{{{\text{A}}\overline {\text{x}} }}{\text{ below}}$$ B) $$\frac{{{I_{\text{G}}}}}{{{\text{A}}\overline {\text{x}} }}{\text{ above}}$$ C) $$\frac{{{\text{A}}\overline {\text{x}} }}{{{I_{\text{G}}}}}{\text{ below}}$$ D) $$\frac{{{\text{A}}\overline {\text{x}} }}{{{I_{\text{G}}}}}{\text{ above}}$$

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Answer & Solution

Answer: Option A

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The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

A) Density of liquid B) Specific gravity of liquid C) Compressibility of liquid D) Surface tension of liquid

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Answer & Solution

Answer: Option B

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According to Bazin's formula, the discharge over a rectangular weir is $${\text{mL}}\sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{3}{2}}},$$ where m is equal to

A) $$0.405 + \frac{{0.003}}{{\text{H}}}$$ B) $$0.003 + \frac{{0.405}}{{\text{H}}}$$ C) $$0.405 + \frac{{\text{H}}}{{{\text{0}}{\text{.003}}}}$$ D) $$0.003 + \frac{{\text{H}}}{{{\text{0}}.405}}$$

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Answer & Solution

Answer: Option A

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In an isothermal atmosphere, the pressure

A) Decreases linearly with elevation B) Remain constant C) Varies in the same way as the density D) Increases exponentially with elevation

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Answer & Solution

Answer: Option C

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Rain drops are spherical because of

A) Viscosity B) Air resistance C) Surface tension forces D) Atmospheric pressure

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Answer & Solution

Answer: Option C

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Surface energy per unit area of a surface is numerically equal to

A) Atmospheric pressure B) Surface tension C) Force of adhesion D) Force of cohesion

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Answer & Solution

Answer: Option B

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The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

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 a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

A) Double B) Four times C) Eight times D) Sixteen times

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Answer & Solution

Answer: Option A

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In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

A) Double B) Four times C) Eight times D) Sixteen times

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Answer & Solution

Answer: Option D

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To avoid an interruption in the flow of a siphon, an air vessel is provided

A) At the inlet B) At the outlet C) At the summit D) At any point between inlet and outlet

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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