Fluid Mechanics For Chemical MCQs

Option A: As the square of the radius

Option B: Inversely as the pressure drop

Option C: Inversely as the viscosity

Option D: As the square of the diameter

Correct Answer: As the square of the radius ✔

Option A: 500

Option B: 200

Option C: 1000

Option D: 750

Correct Answer: 500 ✔

Option A: Centrifugal pump

Option B: Reciprocating pump

Option C: Gear pump

Option D: Axial flow pump

Correct Answer: Gear pump ✔

Option A: 4.728

Option B: 0.5

Option C: 0.622

Option D: 0.474

Correct Answer: 0.622 ✔

Option A: Screw

Option B: Reciprocating

Option C: Gear

Option D: Centrifugal

Correct Answer: Centrifugal ✔

Option A: Multiplying with density (gm/c.c)

Option B: Dividing by density (gm/c.c)

Option C: Multiplying with specific gravity

Option D: Dividing by specific gravity

Correct Answer: Dividing by density (gm/c.c) ✔

Option A: Thickness only

Option B: Outer diameter only

Option C: Thickness & outer diameter both

Option D: Inner diameter

Correct Answer: Thickness & outer diameter both ✔

Option A: Head loss is the same through each pipe

Option B: Discharge is the same through all the pipes

Option C: Total head loss is equal to the sum of the head losses through each pipe

Option D: None of these

Correct Answer: Head loss is the same through each pipe ✔

Option A: 0.44

Option B: 0.044

Option C: 4.4

Option D: 44

Correct Answer: 0.44 ✔

Option A: 0.5

Option B: 1

Option C: 0.66

Option D: < 0.5

Correct Answer: 1 ✔

Option A: D Δp/8L

Option B: D Δp/4L

Option C: 8 Vavg/D

Option D: 4 Vavg/D

Correct Answer: 8 Vavg/D ✔

Option A: Logarithmic

Option B: Parabolic

Option C: Hyperbolic

Option D: Linear

Correct Answer: Parabolic ✔

Option A: d

Option B: d2

Option C: d4

Option D: d̅ 2

Correct Answer: d ✔

Option A: Venturimeter

Option B: Orificemeter

Option C: Rotameter

Option D: Flow nozzle

Correct Answer: Rotameter ✔

Option A: Shear stress and velocity

Option B: Velocity gradient and pressure intensity

Option C: Shear stress and rate of angular deformation in a fluid

Option D: Pressure gradient and rate of angular deformation

Correct Answer: Shear stress and rate of angular deformation in a fluid ✔

Option A: Increase

Option B: Decrease

Option C: Not change

Option D: Exponentially decrease

Correct Answer: Increase ✔

Option A: Irrotational

Option B: Incompressible

Option C: Viscous

Option D: All A., B. & C.

Correct Answer: D. All A., B. & C. ✔

Option A: Dilatent

Option B: Pseudo-plastic

Option C: Bingham plastic

Option D: Newtonian

Correct Answer: Dilatent ✔

Option A: Rotameter

Option B: Pitot tube

Option C: Venturimeter

Option D: Flow nozzle

Correct Answer: Pitot tube ✔

Option A: Centrifugal

Option B: Piston

Option C: Plunger

Option D: Vane

Correct Answer: Plunger ✔

Option A: Accelerating frictionless

Option B: Static

Option C: Uniformly moving

Option D: None of these

Correct Answer: None of these ✔

Option A: Dynamic

Option B: Static

Option C: Total

Option D: None of these

Correct Answer: Static ✔

Option A: Kozeny-Carman

Option B: Blake-Plummer

Option C: Leva’s

Option D: Hagen-Poiseuille’s

Correct Answer: Blake-Plummer ✔

Option A: Increases the work done

Option B: Decreases the work done

Option C: Causes cavitation

Option D: Results in non-uniform discharge

Correct Answer: Decreases the work done ✔

Option A: 0.25

Option B: 0.5

Option C: 0.66

Option D: 0.95

Correct Answer: 0.95 ✔

Option A: 98

Option B: 147

Option C: 196

Option D: 49

Correct Answer: 98 ✔

Option A: Non-isothermal condition of

Option B: Compressible

Option C: Both A. and B.

Option D: Neither A. nor B.

Correct Answer: D. Neither A. nor B. ✔

Option A: 10 m

Option B: 11 m

Option C: 11.8 m

Option D: 30 m

Correct Answer: 11 m ✔

Option A: Atmospheric air

Option B: Compressed air

Option C: Water

Option D: None of these

Correct Answer: Compressed air ✔

Option A: Fanning’s

Option B: Ergun’s

Option C: Hagen-Poiseuille’s

Option D: None of these

Correct Answer: B. Ergun’s ✔

Option A: 1/(y/3)

Option B: 2y/3

Option C: 1/(y/4)

Option D: 3y/4

Correct Answer: 2y/3 ✔

Option A: Velocity changes linearly with radial distance

Option B: Flow is necessarily rotational

Option C: Radial component of velocity is same everywhere

Option D: Stream lines are not circular

Correct Answer: Velocity changes linearly with radial distance ✔

Option A: Solids are completely entrained

Option B: The pressure drop is less than that for batch fluidisation

Option C: There is no entrainment of solids

Option D: Velocity of the fluid is very small

Correct Answer: Solids are completely entrained ✔

Option A: Shear stress

Option B: Shear force

Option C: Average drag per unit projected area

Option D: None of these

Correct Answer: Average drag per unit projected area ✔

Option A: Increases

Option B: Decreases

Option C: Remain same

Option D: May increase or decrease

Correct Answer: Decreases ✔

Option A: 5

Option B: 50

Option C: 500

Option D: 5000

Correct Answer: 5 ✔

Option A: Run at a lower speed for the same discharge

Option B: Do not need priming

Option C: Deliver fluid with pulsating/fluctuating discharge

Option D: Can be run with discharge line valve closed for a short interval

Correct Answer: Can be run with discharge line valve closed for a short interval ✔

Option A: V1.8

Option B: V-0.2

Option C: V2.7

Option D: V2

Correct Answer: V2 ✔

Option A: Lower thickness

Option B: Lower cross-section

Option C: Outer diameter

Option D: Inner diameter

Correct Answer: Lower cross-section ✔

Option A: 5

Option B: 10

Option C: 50

Option D: 100

Correct Answer: 10 ✔

Option A: Gate valve

Option B: Globe valve

Option C: Butterfly valve

Option D: Check valve

Correct Answer: Globe valve ✔

Option A: Temporal velocity components

Option B: Mean square of velocity fluctuations in the three co-ordinate directions

Option C: Root mean square of velocity fluctuations in the three co-ordinate directions

Option D: None of these

Correct Answer: Mean square of velocity fluctuations in the three co-ordinate directions ✔

Option A: Protect the pump against developing excessive pressure

Option B: Facilitate unidirectional flow of liquid

Option C: Reduce the discharge pressure

Option D: Control the rate of discharge

Correct Answer: Protect the pump against developing excessive pressure ✔

Option A: 0.01 to 0.1

Option B: 0.1 to 2

Option C: 2 to 10

Option D: 10 to 100

Correct Answer: 0.01 to 0.1 ✔