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Fluid Mechanics Multiple Choice Questions | MCQs | Quiz

Fluid Mechanics Interview Questions and Answers
Pratice Fluid Mechanics questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Fluid Mechanics Basics
•   Fluid Properties - 1
•   Fluid Properties - 2
•   Viscosity - 1
•   Viscosity - 2
•   Vapor Pressure
•   Compressibility & Modulus
•   Fluids Types
•   Surface Tension
•   Thermodynamic Properties
•   Capillarity & Cavitation
•   Fluid Pressure
•   Pressure Distribution - 1
•   Pressure Distribution - 2
•   Pascal's Law
•   Pressure Measurement
•   Compressible Pressure
•   Hydrostatic Force - 1
•   Hydrostatic Force - 2
•   Vertical Plane Surface
•   Horizontal & Inclined Plane
•   Liquid Distribution
•   Manometer
•   Buoyancy
•   Metacentric Height
•   Equilibrium Conditions
•   Fluid Flow Types
•   Flow Lines Types
•   Continuity Equation
•   Fluid Flow Methods
•   Two & Three Dimensions
•   Velocity & Acceleration
•   Vortex Flow
•   Potential Flow Cases
•   Super Imposed Flow Cases
•   Fluid Dynamics Basics
•   Newton's Second Law
•   Thermodynamics First Law
•   Navier-Stokes Equations
•   Impulse Momentum
•   Bernoulli Equation
•   Bernoulli Applications
•   Orifice Classification
•   Flow through Large Orifice
•   Notch & Weir Classification
•   Discharge over Notches
•   Time to Empty Reservoir
•   Discharge Over weirs
•   Shear Stress
•   Viscous Fluid Flow - Pipes
•   Kinetic Energy Correction
•   Viscous Flow Power
•   Viscous Flow Loss
•   Dash Pot Movement
•   Velocity Distribution
•   Viscosity Coefficient
•   Energy Loss in Pipes
•   Hydraulic Gradient
•   Pipes in Series
•   Flow through Nozzles
•   Pipes - Water Hammer
•   Pipe Network
•   Ideal Indicator Diagram
•   Indicator Diagrams Effect
•   Reciprocating Pump Speed
•   Dimensional Homogenity
•   Rayleighs Method
•   Model Analysis
•   Similarities Similitude Types
•   Moving Fluid Forces Types
•   Submerged Bodies Testing
•   Dimensionless Numbers
•   Flat Plate Layers
•   Boundary Layer Separation
•   Sphere Drag
•   Thermodynamic Relations
•   Compressible Flow Basics
•   Fluid Velocity - 1
•   Fluid Velocity - 2
•   Stagnation Properties
•   Area Velocity Relationship
•   Compressible Fluid Flow
•   Channels Flow Types
•   ↓ Geometrical Properties ↓
•   Rectangular Section
•   Triangular Section - 1
•   Triangular Section - 2
•   Trapezoidal Section
•   Chezy's Equation
•   Manning's Equation - 1
•   Manning's Equation - 2
•   ↓ Most Economic ↓
•   Rectangular Section
•   Trapezoidal Section
•   Circular Section - 1
•   Circular Section - 2
•   Circular Section - 3
•   Specific Energy - 1
•   Specific Energy - 2
•   Channel Sections Flow - 1
•   Channel Sections Flow - 2
•   Gradually Varied Flow - 1
•   Gradually Varied Flow - 2
•   Gradually Varied Flow - 3
•   Gradually Varied Flow - 4
•   Gradually Varied Flow - 5
•   Wide Rectangular Channels
•   Channel Bottom Slopes
•   Surface Profiles
•   Hydraulic Jump
•   Hydraulic Jumps Types
•   Hydraulic Jump Location
•   Specific Force
•   ↓ Jet Exerted Force ↓
•   Stationary Flat Plate
•   Stationary Curved Plate
•   Series of Vanes

Best Reference Books

Fluid Mechanics Books

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Fluid Mechanics Questions and Answers – Specific Force

Posted on August 23, 2018 by Manish

This set of Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on “Specific Force”.

1. Which among the following provides the third principle in fluid mechanics?
a) Conservation of mass
b) Conservation of linear momentum
c) Conservation of Heat
d) Conservation of volume
View Answer

Answer: b
Explanation: In fluid mechanics, the third principle is given by the conservation of linear momentum. It is in addition to the continuity of mass and conservation of energy. They are mostly seen in channel flow problems.
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2. Momentum principle states that all the forces acting in the system result in a change in momentum.
a) True
b) False
View Answer

Answer: a
Explanation: Momentum principle states that all the forces acting in the system result a change in momentum. It is in addition to the continuity of mass and conservation of energy. Thus, the correct option is “true”.

3. Which among the following is not a force that acts in the downstream of the fluid flow?
a) Pressure
b) Weight
c) Friction
d) Gravity
View Answer

Answer: c
Explanation: Frictional force is a force that does not act in the downstream of the fluid flow. Friction acts in the upstream direction, as friction always opposes the flow of fluid through a stream developing a viscous flow.

4. Which among the following is present in pipe flow?
a) Viscous force
b) Inertial force
c) Gravity force
d) Pressure force
View Answer

Answer: d
Explanation: Pressure is a force that is applied perpendicular to the surface of an object over a unit area of force. It is defined as the product of pressure intensity and cross-sectional area of the flowing fluid. Pressure force is present in the case of pipe flow.

5. What is momentum?
a) Mass * acceleration
b) Mass * Volume
c) Mass flow rate * velocity
d) Mass flow rate* density
View Answer

Answer: c
Explanation: Momentum is an expression that is made up of two main functions. These two terms play a significance role in determining the function. The two terms are mass flow rate and velocity. Thus, the final formula is mass flow rate * velocity.
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6. A force that is needed to bring back the body to its original position is called as?
a) Viscous force
b) Elastic force
c) Gravity force
d) Pressure force
View Answer

Answer: c
Explanation: Elastic force is the force that brings a body back to its original position. It is defined as the product of elastic stress and the area of the flowing fluid.

7. What is a specific force denoted as?
a) N
b) F
c) M
d) S
View Answer

Answer: c
Explanation: Specific force is defined as the force that is expressed in terms of its momentum. It is the momentum of flow passing through a channel of cross section per unit time per unit weight and a second is a force per unit weight. This sum is called the specific force.

8. Energy is not conserved throughout the pipe.
a) True
b) False
View Answer

Answer: a
Explanation: It is not possible when the initial speed is less than the critical speed. There is a transition that is created during the change. Though momentum is conserved throughout the hydraulic jump, energy is not conserved.

9. Specific force is __________ to mass flow rate.
a) Directly proportional
b) Inversely proportional
c) Independent
d) Not proportional
View Answer

Answer: a
Explanation: Specific force is directly proportional to the mass flow rate. Specific force is defined as the force that is expressed in terms of it momentum. It is the momentum of flow passing through a channel of cross section per unit time per unit weight and a second is the force per unit weight.

10. Specific force is __________ to cross sectional area.
a) Directly proportional
b) Inversely proportional
c) Independent
d) Not proportional
View Answer

Answer: a
Explanation: Specific force is inversely proportional to the mass flow rate. Specific force is defined as the force that is expressed in terms of it momentum. It is the momentum of flow passing through a channel of cross section per unit time per unit weight and a second is the force per unit weight.
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Sanfoundry Global Education & Learning Series – Fluid Mechanics.

To practice all areas of Fluid Mechanics, here is complete set of 1000+ Multiple Choice Questions and Answers.

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« Fluid Mechanics Questions and Answers – Location of a Hydraulic Jump
Fluid Mechanics Questions and Answers – Force Exerted by a Jet on a Stationary Flat Inclined Plate »
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