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Q1. | In a fluidised bed reactor |

A. | temperature gradients are very high. [Wrong Answer] |

B. | temperature is more or less uniform. [Correct Answer] |

C. | hot spots are formed. [Wrong Answer] |

D. | segregation of the solids occurs. [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ Bernoulli's equation accounts for the

various momentums

various masses

different forms of mechanical energy

none of these

⇒ Sewage sludge is __________ type of non-Newtonion fluid.

dilatant

Bingham plastic

Pseudo plastic

none of these

⇒ In case of laminar flow of fluid through a circular pipe, the

shear stress over the cross-section is proportional to the distance from the surface of the pipe.

surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder.

velocity profile varies hyperbolically and the shear stress remains constant over the cross-section.

average flow occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius).

⇒ For flow past a flat plate, if x is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to

x

1/x

x

1/x

⇒ Mass velocity is independent of temperature & pressure, when the flow is

unsteady through unchanged cross-section.

steady through changing cross-section.

steady and the cross-section is unchanged.

unsteady and the cross-section is changed.

⇒ Major loss in sudden contraction in pipe flow is due to

boundary friction.

flow contraction.

expansion of flow after sudden contraction.

none of these.

⇒ The curve of metacentre for a floating body __________ the curve of buoyancy.

is always below

is the evolute of

intersects at right angle

is tangential to

⇒ A pressure of 10 m head of water is equivalent to __________ kN/m

^{2}.

98

147

196

49

⇒ As per Newton's law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to(where, μ = fluid viscosity)

1/μ

μ

μ2

1/μ2

⇒ Power required for mixing Newtonion fluids is a function of the

speed of impeller, diameter of impeller & viscosity.

density & viscosity of fluid only.

density of fluid, viscosity of fluid & impeller dia only.

none of these.

⇒ A perfect gas

does not satisfy

*PV*=

*nRT*.

is incompressible and has zero viscosity.

has constant specific heat.

can't develop shear stresses.

⇒ Pressure co-efficient is the ratio of pressure forces to __________ forces.

gravity

inertial

viscous

none of these

⇒ The head developed by a centrifugal pump is largely determined by the

power of the pump.

nature of the liquid being pumped.

angle of the vanes and the speed of the tip of the impeller.

vapour pressure of the liquid.

⇒ Scale up of agitator design requires

geometrical similarity only.

dynamic similarity only.

both geometrical and dynamic similarity.

all geometrical, dynamic and kinematic similarity.

⇒ Drag force acting on a body does not depend upon the

density of the fluid.

density of the body.

velocity of the body.

projected area of the body.

⇒ Rise of liquid in a capillary tube is due to

cohesion

adhesion

both (a) & (b)

neither (a) nor (b)

⇒ The head loss in turbulent flow in a pipe varies

as velocity

as (velocity)

^{2}

inversely as the square of diameter

inversely as the velocity

⇒ Which of the following equations is valid for laminar flow of a fluid through packed bed?

Fanning equation

Kozney - Karman equation

Hagen-Poiseuille equation

Blake-Plummer equation

⇒ Which of the following exemplifies a three dimensional fluid flow ?

Fluid flow at the inlet to a nozzle

Fluid flow between parallel plates

Viscous fluid flow between converging plates

None of these

⇒ Turbine impeller

produces only radial current.

produces only tangential current.

is effective over wide range of viscosities.

does not produce tangential current.

⇒

*N*/

^{2}_{Re}*N*is called the __________ number.

_{Fr}Brinkman

Galileo

Archimedes

Euler

⇒ As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1

increases linearly with V.

decreases linearly with V.

decreases as V

^{2}.

none of these.

⇒ It is possible to integrate an automatic flow controller to a

flow nozzle

venturimeter

rotameter

none of these

⇒ The simple pitot tube measures the __________ pressure.

static

dynamic

total

none of these

⇒ The maximum delivery pressure of a reciprocating compressor may be about __________ kg/cm

^{2}.

1000

2000

3000

4000

⇒ The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head.

elevation

velocity

both (a) & (b)

neither (a) nor (b)

⇒ I.D. of 1/4" schedule 40 pipe is 0.364". I.D. of a 1/2" schedule 40 pipe would be __________ inch

4.728

0.5

0.622

0.474

⇒ In fluid flow, cavitation is caused, if the

fluid velocity decreases to zero.

total energy decreases.

both (a) and (b).

flow pressure approaches its vapor pressure at the prevailing temperature.

⇒ A tube is specified by its

thickness only

outer diameter only

thickness & outer diameter both

inner diameter

⇒ A centrifugal pump has the following specificatio

2

4

8

5.5