chemical engineering fluid mechanics for chemical chemical engineering MCQs – Page 31

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 Review each marked answer and report any item that may be outdated or unclear.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
601. The bulk modulus of elasticity of a liquid__________________?
comments icon0

A. Is zero for incompressible liquid

B. Decreases with pressure

C. Is independent of temperature & pressure

D. Increases with pressure
602. What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta ?
comments icon0

A. 0.94

B. 1.65

C. 0.32

D. 0.64
603. The continuity equation__________________?
comments icon0
A. Relates mass flow rate along a stream tube

B. Relates work and energy

C. Stipulates that Newtons second law of motion must be satisfied at every point in the fluid

D. None of these

604. Fluid flow in a/an ______________ is an example of pressure flow?
comments icon0

A. Partially filled pipeline

B. Open channel

C. River

D. Pipe
605. Open channel liquid flow is most conveniently measured by a__________________?
comments icon0
A. Notch

B. Rotameter

C. Segmental orifice

D. Hot wire anemometer

606. Pick out the Hagen-Poiseuille?s equation ?
comments icon0

A. 2cD)

B. ?p = 32 (?LV/gc. D2)

C. ?p/L = 150 [(1 ?)/?3]. (?.V0

D. cDp)

E. ?p/L = 1.75 [(1 ?)/?3]. (?V0

F. ?p/? = 4f (L/D) (V2/2gc)

607. Which of the following assumptions enables the Eulers equation of motion to be integrated ?
comments icon0

A. The continuity equation is satisfied

B. The fluid is non-viscous

C. The fluid is incompressible

D. The flow is rotational and incompressible

608. Which of the following is not concerned with the fluid-particle interaction ?
comments icon0

A. Galileo number

B. Drag co-efficient

C. Froude number

D. Weber number
609. Various efficiencies of a centrifugal pump are related as (where, ?m = mechanical efficiency ?v = volumetric efficiency. ?ma = manometric efficiency ?o = overall efficiency) ?
comments icon0
A. ?m = ?v . ?ma

B. ?v = ?m ?ma

C. ?ma ?m ?v = ?o

D. ?ma = ?m ?v

610. Co-efficient of velocity is ___________________ the coefficient of discharge?
comments icon0

A. Equal to

B. Less than

C. Not related to

D. More than
611. The pump impeller and the turbine runner in a hydraulic torque converter___________________?
comments icon0

A. None of these

B. Are directly coupled

C. Have different diameters

D. Have the same diameter

612. The ratio of width to depth for the most economical rectangular section in open channel flow is_________________?
comments icon0
A. 2

B. 1

C. 0.5

D. 1.5

613. For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively)?
comments icon0

A. Either A. or B.; depends on other factors

B. Increase

C. Remain constant

D. Decrease

614. A mono pump is a __________ pump ?
comments icon0

A. Piston

B. Positive acting rotary

C. Centrifugal

D. A group of vacuum

615. Bernoulli?s equation does not apply to the functioning of a/an__________________?
comments icon0
A. None of these

B. pitot tube

C. Orificemeter

D. Venturimeter

616. The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a____________________?
comments icon0

A. V-notch

B. Pitot tube

C. Kennison nozzle

D. Weir

617. Boundary layer separation occurs when the____________________?
comments icon0

A. Pressure reaches a minimum

B. Velocity of sound is reached

C. Valve is closed in a pipeline

D. Cross-section of the channel is reduced
618. For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter) ?
comments icon0

A. Vs2/Dp3

B. Vs2/Dp2

C. Vs/Dp3

D. Vs/Dp2
619. The pipe wall thickness is minimum for a pipe of given nominal size having schedule number___________________?
comments icon0

A. 160

B. 80

C. 40

D. 120

620. Bernoullis equation describes the _______________?
comments icon0

A. Mechanical energy balance in boundary layer

B. Mechanical energy balance in potential flow

C. Kinetic energy balance in laminar flow

D. Mechanical energy balance in turbulent flow