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
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

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

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

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

6722. A pipe is defined as hydraulically smooth, if the friction factor_________________?
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A. For a given Reynolds number remains constant even on further smoothening of the pipe

B. Is zero irrespective of the Reynolds number

C. None of these

D. Is not a function of Reynolds number

6723. In the Newtons law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is ______________ the fluid viscosity?
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A. Independent of

B. Inversely proportional to

C. Inversely proportional to the square root of

D. Directly proportional to

6724. Cd for the orifice plate varies from ___________________?
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A. 0.58 to 0.8

B. 0.93 to 0.98

C. 0.2 to 0.3

D. 0.02 to 0.03

6727. Volume of liquid displaced by a floating body is equivalent to its_________________?
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A. Submerged weight

B. Own weight

C. Own volume

D. Submerged volume

6728. The rate of change of moment of momentum represents the ______________ by the fluid?
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A. Force exerted

B. Power developed

C. Work done

D. Torque applied
6731. The discharge co-efficient for an orifice meter does not depend upon the ___________________?
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A. Pipe diameter

B. Pipe length

C. Type of orifice & the Reynolds number

D. Ratio of pipe diameter to orifice diameter

6734. An ideal nozzle design aims at________________?
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A. Minimising wall friction

B. Suppressing boundary layer separation

C. Both A. & B.

D. Neither A. nor B.

6735. Which of the following quantities are computed by using the hydraulic radius for noncircular ducts ?
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A. Velocity and relative roughness

B. Reynold number, relative roughness and head loss

C. Head loss and velocity

D. Reynolds number and friction factor

6736. Slugging in a fluidised bed can be avoided by using_____________________?
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A. Shallow beds of solids and proper choice of particle size

B. Tall narrow vessel

C. Very large particles

D. Deep bed of solids

6737. Deformation drag, which is caused by widespread deformation of fluid around the immersed body____________________?
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A. Depends mainly on cross-sectional shape

B. Is primarily a friction drag

C. Occurs when NRe is very small

D. Is independent of body length

6741. The ____________ is measured by a piezometric opening?
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A. Static pressure

B. Total pressure

C. Dynamic pressure

D. Point velocity

6743. Power loss in an orificemeter is _____________ that in a Venturimeter?
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A. Less than

B. Data insufficient, cannot be predicted

C. More than

D. Same as

6745. Volute type of casing is provided in a centrifugal pump to___________________?
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A. Convert velocity head to pressure head

B. Reduce the discharge fluctuation

C. Increase the discharge

D. Convert pressure head to velocity head

6747. Dean number is concerned with the____________________?
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A. Fluid-particle interaction

B. Psychrometry

C. Power consumption in agitated vessels

D. Fluid flow through helical pipes
6748. Priming of a centrifugal pump is done to___________________?
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A. Increase the mass flow rate of fluid

B. Avoid chances of separation inside the impeller

C. None of these

D. Develop effective pressure rise by the pump

6750. A streamline is_________________?
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A. The line connecting the mid-points of flow cross-sections

B. Always the path of a particle

C. Defined for uniform flow only

D. Drawn normal to the velocity vector at every point