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-9 section-5

The fluid forces considered in the Navier Stokes equation are

A) Gravity, pressure and viscous B) Gravity, pressure and turbulent C) Pressure, viscous and turbulent D) Gravity, viscous and turbulent

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Answer & Solution

Answer: Option A

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The tendency of a liquid surface to contract is due to the following property

A) Cohesion B) Adhesion C) Viscosity D) Surface tension

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Answer & Solution

Answer: Option D

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The pressure measured with the help of a Piezometer tube is in

A) N/mm² B) N/m² C) Head of liquid D) All of these

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Answer & Solution

Answer: Option C

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A tank of uniform cross-sectional area (A) containing liquid upto height (H₁) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

A) $$\frac{{2{\text{A}}\sqrt {{{\text{H}}_1}} }}{{{{\text{C}}_{\text{d}}} \times {\text{a}}\sqrt {2{\text{g}}} }}$$ B) $$\frac{{2{\text{A}}{{\text{H}}_1}}}{{{{\text{C}}_{\text{d}}} \times {\text{a}}\sqrt {2{\text{g}}} }}$$ C) $$\frac{{2{\text{AH}}_1^{\frac{3}{2}}}}{{{{\text{C}}_{\text{d}}} \times {\text{a}}\sqrt {2{\text{g}}} }}$$ D) $$\frac{{2{\text{AH}}_1^2}}{{{{\text{C}}_{\text{d}}} \times {\text{a}}\sqrt {2{\text{g}}} }}$$

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Answer & Solution

Answer: Option A

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According to equation of continuity,

A) w₁a₁ = w₂a₂ B) w₁v₁ = w₂v₂ C) a₁v₁ = a₂v₂ D) $$\frac{{{{\text{a}}_1}}}{{{{\text{v}}_1}}} = \frac{{{{\text{a}}_2}}}{{{{\text{v}}_2}}}$$

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Answer & Solution

Answer: Option C

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The vapour pressure over the concave surface is

A) Less man the vapour pressure over the plane surface B) Equal to the vapour pressure over the plane surface C) Greater than the vapour pressure over the plane surface D) Zero

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Answer & Solution

Answer: Option A

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The equation of continuity holds good when the flow

A) Is steady B) Is one dimensional C) Velocity is uniform at all the cross sections D) All of the above

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Answer & Solution

Answer: Option D

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Pitot tube is used for measurement of

A) Pressure B) Flow C) Velocity D) Discharge

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Answer & Solution

Answer: Option C

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According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth and i = Uniform slope in bed)

A) $${\text{A}}\sqrt {{\text{m}} \times {\text{i}}} $$ B) $${\text{C}}\sqrt {{\text{m}} \times {\text{i}}} $$ C) $${\text{AC}}\sqrt {{\text{m}} \times {\text{i}}} $$ D) $${\text{mi}}\sqrt {{\text{A}} \times {\text{C}}} $$

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Answer & Solution

Answer: Option C

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Principle of similitude forms the basis of

A) Comparing two identical equipments B) Designing models so that the result can be converted to prototypes C) Comparing similarity between design and actual equipment D) Hydraulic designs

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Answer & Solution

Answer: Option B

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

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering