chemical engineering fluid mechanics for chemical chemical engineering MCQs – Page 35

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 Review each marked answer and report any item that may be outdated or unclear.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

681. In fluid flow, the stagnation point is defined as a point, where the _____________ is zero?
0

A. Pressure

B. Flow velocity

C. All A., B. and C.

D. Total energy

682. The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is_________________?
0

A. Q?N3 : H?N : P?N2

B. Q?N : H?N2 : P?N3

C. Q?N2 : H?N3 : P?N

D. Q?N : H?N3 : P?N2

683. Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?
0

A. Increase or decrease depending on the pipe material

B. Increase

C. Remain unchanged

D. Decrease

684. For water, when the pressure increases, the viscosity_________________?
0

A. Also increases

B. First decreases, and then increases

C. Remain constant

D. Decreases

685. In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is___________________?
0

A. Dependent on fluid viscosity

B. Dependent on fluid density

C. The velocity of sound

D. Dependent on its cross-sectional area

686. A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an _____________ fluid?
0

A. Incompressible

B. Non-Newtonian

C. Newtonian

D. Ideal

687. Multistage centrifugal pumps are generally used for________________?
0

A. Slurries of high solid concentration

B. Low head but high discharge

C. High head

D. Highly viscous liquid

688. Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flowmeters, because their ______________ is very low/small?
0

A. Specific gravity

B. Thermal conductivity

C. Electrical conductivity

D. Electrical resistivity

689. Viscosity of water is about _____________ times that of air at room temperature?
0

A. 55

B. 15

C. 1050

D. 155

690. Pick out the correct statement pertaining to the flow through a converging-diverging tube ?
0

A. The value of Mach number is always unity at the throat

B. Throughout the converging portion of the tube, the density increases in the downstream

C. No shock wave develops in the tube when the Mach number at exit is greater than unity

D. None of these

E. ection

691. One dimensional fluid flow implies the ________________________?
0

A. Uniform flow

B. Steady uniform flow

C. Flow in which transverse components are zero

D. Flow in straight lines only

692. Pick out the wrong statement ?
0

A. Momentum transfer in laminar flow results from velocity gradient

B. A fluid in equilibrium is not free from shear stress

C. The viscosity of a non-Newtonian fluid is a function of temperature only

D. Both B. and C.

693. Pressure drop for laminar fluid flow through a circular pipe is given by__________________?
0

A. 4f (L/D) (v2/2gc) ?

B. 32 (?LV/gc D2)

C. 16/NRe

D. (fL?/D) (v2/2gc)

694. A globe valve is the most suitable for applications, in which____________________?
0

A. Fluid contains dispersed solid particles

B. Fluid flow control is required

C. One way flow is required

D. Valve is required to be either fully open or fully closed

695. Turbine impeller____________________?
0

A. Produces only tangential current

B. Produces only radial current

C. Is effective over wide range of viscosities

D. Does not produce tangential current

696. The lift of a balloon is_________________?
0

A. None of these

B. Increased, as it rises to a higher altitude

C. Not dependent on the temperature of the atmosphere

D. Due to the weight of the atmospheric air, that it displaces

697. Path followed by water jet issuing from the bottom of a water tank will be a__________________?
0

A. Horizontal straight line

B. Hyperbola

C. Zig-zag path (which is geometrically undefined)

D. Parabola (vertex being at the opening)

698. During ageing of fluid carrying pipes, the__________________?
0

A. Absolute roughness increases linearly with time

B. Friction factor increases linearly with time

C. Pipe becomes smoother with use

D. Absolute roughness decreases with time

699. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the ____________ head?
0

A. Static

B. Total

C. Friction

D. Manometric

700. It is possible to integrate an automatic flow controller to a________________?
0

A. Venturimeter

B. Rotameter

C. None of these

D. Flow nozzle

Previous Next

Showing 681 to 700 of 744 mcqs