chemical engineering MCQs – Page 336

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

6701. The temperature in isentropic flow_______________?
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A. Depends on Mach number only

B. None of these

C. Does not depend on Mach number

D. Cannot drop and then increase again downstream

6702. Which of the following is not dimension-less ?
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A. None of these

B. Froude number

C. Pressure co-efficient

D. Kinematic viscosity

6703. The unit of dynamic viscosity in SI unit is__________________?
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A. kg/m. sec

B. m/N. sec

C. N/m2

D. m2 /sec

6704. The discharge through a V-notch weir varies as___________________?
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A. H2/3

B. H5/2

C. H3/2

D. H1/2

6705. The pump impeller and the turbine runner in a hydraulic torque converter___________________?
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A. Are directly coupled

B. Have different diameters

C. Have the same diameter

D. None of these

6706. Unsteady uniform flow is represented by flow through a/an_________________?
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A. Long pipe at decreasing rate

B. Expanding tube at increasing rate

C. Long pipe at constant rate

D. Expanding tube at constant rate

6707. The Navier-Stokes equation deals with the law of conservation of___________________?
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A. Mass

B. Energy

C. Both A. & B.

D. Momentum

6708. Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will_______________?
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A. Be quadrupled

B. Decrease

C. Increase

D. Remain same

6709. What causes convective acceleration in fluid flow ?
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A. Turbulence in flow

B. Steep slope in flow

C. Non-uniformity of flow

D. Unsteady nature of flow

6710. Vena-contracta formed during flow of a liquid through an orificemeter has__________________?
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A. More diameter compared to orifice diameter

B. None of these

C. Minimum velocity of fluid stream

D. Minimum liquid cross-section

6711. Gradually varied flow in open channel is a/an ____________ flow?
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A. Unsteady uniform

B. Steady non-uniform

C. Steady uniform

D. Unsteady non-uniform

6712. Manometers measure the ______________ pressure?
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A. Vacuum as well as the atmospheric

B. Difference in

C. Gage

D. Absolute

6713. Vena-contracta pressure tapping is at a distance _______________ from the position of an orificemeter fitted in a pipe of internal diameter d ?
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A. 0.5 d

B. 4d

C. d

D. 2d

6714. A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation ?
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A. None of the above

B. Drag, gravitational and buoyancy forces are important

C. Drag force and gravitational forces are important

D. Inertial and drag forces are important

6715. Which of the following fluid forces are not considered in the Navier-Stokes equation ?
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A. Turbulent forces

B. Gravity forces

C. Viscous forces

D. Pressure forces

6716. Cp/Cv is termed as__________________?
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A. Mach number

B. Adiabatic constant

C. Prandtl number

D. Weber number

6717. If the head over the triangular notch is doubled, the discharge will increase by ______________ times?
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A. 2

B. 2.828

C. 5.657

D. 4

6718. Velocity at a certain point in case of streamline flow is_________________?
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A. Constant

B. Independent of time

C. Both A. & B.

D. Neither A. nor B.

6719. Fluid flow at increasing rate through a diverging pipe is an example of ______________ flow?
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A. Steady uniform

B. Non-steady uniform

C. Non-steady non-uniform

D. Steady non-uniform

6720. A differential pressure cell is used for____________________________?
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A. Measuring small pressure difference in liquids

B. Remote recording of pressure difference

C. Measuring the difference of the impact & the static pressure

D. Measuring small pressure difference in gases

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