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This set of Fluid Mechanics and Machinery Multiple Choice Questions & Answers (MCQs) focuses on Fluid Mechanics And Machinery Set 11
Q1 | Gravitational force is the weakest force in nature.
- true
- false
Q2 | Which of the following is an example of electromagnetic force?
- motion of moon around earth
- evolution of stars
- evolution of galaxies
- compression of spring
Q3 | Why is climbing a lamp post harder than climbing up a tree?
- because of parallel friction force
- because of contact force between the bodies
- because of van der wall’s force
- because of rope force
Q4 | Gravitational force, despite being a weak force, governs the large scale motion.
- true
- false
Q5 | When a body is falling freely under gravity, the total mechanical energy remains constant because of which of the following?
- law of conservation of energy
- unification of force
- electromagnetic force
- gravity
Q6 | What happens when a bullet is fired from a rifle?
- the rifle becomes weightless
- we fall back
- rifle gives backward kick
- bullet doesn’t leave the rifle
Q7 | Similitude is a concept applicable to the testing of
- mathematical models
- physical models
- engineering models
- chemical models
Q8 | Which among the following is the main application for Similitude?
- ships
- cars
- hydraulics
- train
Q9 | A model of with same shape is
- geometric similarity
- kinematic similarity
- dynamic similarity
- conditional similarity
Q10 | Which among the following have similar fluid streamlines?
- geometric similarity
- kinematic similarity
- dynamic similarity
- conditional similarity
Q11 | Which among the following have the same forces acting on them?
- geometric similarity
- kinematic similarity
- dynamic similarity
- conditional similarity
Q12 | All the parameters in a similitude are described using
- continuum mechanics
- solid mechanics
- diesel mechanics
- aircraft mechanics
Q13 | Physical similitude has exactly the same geometric shape of the prototype.
- true
- false
Q14 | Which among the following is a standard scale for a similitude?
- 1:250
- 1:50
- 1:25
- 1:100
Q15 | In similitude, Fapplication=Fmodel*3.44
- true
- false
Q16 | The rate at which the particles of fluid can spread is called
- surface tension
- diffusivity
- viscosity
- kinetics
Q17 | Which among the following is the standard symbol for Archimedes number?
- a
- ar
- a
Q18 | The Prandtl Number approximates
- momentum diffusivity to thermal diffusivity
- thermal diffusivity to momentum diffusivity
- shear stress to thermal diffusivity
- thermal diffusivity to kinematic viscosity
Q19 | Which among the following is the standard symbol for Atwood number?
- ar
- ar
- a
Q20 | Which among the following is the standard symbol for Blake number?
- bi
- ba
- bl
- b
Q21 | Fanning friction factor is
- 0.25 times darcy friction factor
- same as darcy friction factor
- 2 times darcy friction factor
- independent
Q22 | Which among the following is the standard symbol for Froude number?
- f
- fo
- fr
- f
Q23 | Which among the following is the formula for Knudsen number?
- λ⁄l
- λ⁄2l
- λ⁄3l
- λ⁄4l
Q24 | Principle of fluid mechanics works on the utilization of
- accelerating mass
- volume
- work
- velocity
Q25 | The force analysis on a curved vane is understood using
- velocity triangles
- angle of the plate
- vane angles
- plate dimensions