chemical engineering fluid mechanics for chemical chemical engineering MCQs – Page 32

Practise multiple-choice questions from chemical engineering fluid mechanics for chemical chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering fluid mechanics for chemical chemical engineering Mcqs
621. A streamline is_________________?
comments icon0

A. Always the path of a particle

B. Defined for uniform flow only

C. The line connecting the mid-points of flow cross-sections

D. Drawn normal to the velocity vector at every point
622. Which of the following is not dimension-less ?
comments icon0

A. Froude number

B. Kinematic viscosity

C. Pressure co-efficient

D. None of these

623. _____________ forces act on a particle moving through a stationary fluid?
comments icon0

A. Gravity

B. Buoyant

C. All A., B., & C.

D. Drag

624. Specific speed of a centrifugal pump relates it with another pump having the___________________?
comments icon0

A. Same efficiency

B. Same speed

C. Geometrical similarity

D. Dynamic similarity
625. Fanning equation is given by (?P/?) = 4f (L/D) (v2/2gc). It is applicable to _____________ region flow?
comments icon0

A. Transition

B. Laminar

C. Turbulent

D. Both B. and C.
626. Working of a _______________ pump characterises mixed flow?
comments icon0
A. Turbine

B. Diaphragm

C. None of these

D. Piston

627. At a constant speed of the centrifugal pump, it?s _____________ the impeller diameter?
comments icon0
A. All A., B. and C.

B. Horsepower varies as the cube of

C. Capacity varies directly with

D. Head varies as the square of

628. The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is_______________________?
comments icon0

A. None of these

B. Hyperbolic

C. Linear

D. Parabolic
629. The unit of dynamic viscosity in SI unit is__________________?
comments icon0

A. m2 /sec

B. N/m2

C. m/N. sec

D. kg/m. sec
630. When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the _______________ bed?
comments icon0
A. Spouted

B. Sluggish

C. Boiling

D. Teeter

631. The speed of sound in an ideal gas varies as the __________________?
comments icon0

A. Pressure

B. None of these

C. Density

D. Temperature
632. Centre of pressure in an immersed body is ______________ the centre of gravity?
comments icon0

A. Above

B. Below

C. Either above or below; depends on the liquid density

D. At

633. The co-efficient of drag and lift for an incompressible fluid depends on the_________________?
comments icon0

A. All A., B. and C.

B. Reynolds number

C. Mach number

D. Froude number

634. If Blasius or Darcy friction factor is f1 then the Fanning friction factor is equal to____________________?
comments icon0
A. f1/4

B. 4f2

C. 2f1

D. f1/2

635. Stokes law is valid, when NRe, p is less than_________________?
comments icon0

A. 2100

B. 2

C. 100

D. 700

636. The terminal velocity of a small sphere settling in a viscous fluid varies as the___________________?
comments icon0
A. Inverse of the fluid viscosity

B. Inverse square of the diameter

C. First power of its diameter

D. Square of the difference in specific weights of solid & fluid

637. Dean number is concerned with the____________________?
comments icon0

A. Fluid-particle interaction

B. Fluid flow through helical pipes

C. Psychrometry

D. Power consumption in agitated vessels

638. Baffles in mixing tanks are provided to__________________?
comments icon0

A. None of these

B. Aid in rotational flow

C. Reduce swirling and vortex formation

D. Increase the structural strength of the tank

639. If x is the depth of flow in an open channel of large width, then the hydraulic radius is equal to________________?
comments icon0

A. x/3

B. x

C. x/2

D. 2x/3

640. The head loss due to sudden expansion is__________________?
comments icon0

A. (V1 V2)/2gc

B. (V12 V22)/gc

C. (V12 V22)/2gc

D. (V1 V2)2/2gc