chemical engineering MCQs – Page 329

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 Review each marked answer and report any item that may be outdated or unclear.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

6561. The ratio of inertial forces to gravity forces is called the ______________ number?
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A. Euler

B. Weber

C. Froude

D. Mach

6562. ____________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline?
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A. Venturimeter

B. Pressure gauge

C. Orificemeter

D. Pitot tube

6563. If Blasius or Darcy friction factor is f1 then the Fanning friction factor is equal to____________________?
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A. f1/4

B. 2f1

C. f1/2

D. 4f2

6564. Purpose of hydraulic accumulator is to_______________?
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A. Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

B. Accumulate pressure to increase force

C. Ensure intermittent supply of hydraulic pressure

D. Increase the pressure and store/ accumulate it

6565. Flow measurement in an open channel is done by a/an ________________?
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A. Venturimeter

B. Orificemeter

C. Weir

D. Rotameter

6566. The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is_______________________?
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A. Hyperbolic

B. Parabolic

C. Linear

D. None of these

6567. The capacity of an accumulator is the maximum_________________?
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A. Liquid which it can store

B. Discharge which it can deliver

C. None of these

D. Energy which it can store

6568. In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas) ?
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A. M

B. 1/?M

C. 1/M

D. ?M

6569. The ratio of wall drag to total drag in the Stokes law range is_________________?
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A. 1

B. 0.5

C. 3-Jan

D. 2/3

6570. Speed of sound in an ideal gas depends on its________________?
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A. Pressure

B. None of these

C. Temperature

D. Specific volume

6571. Eulers equation of motion states, that at every point, the_________________?
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A. Fluid momentum is constant

B. Rate of mass outflow is equal to the rate of mass inflow

C. Force per unit mass equals acceleration

D. None of these

6572. The pitot static tube does not measure the _____________ pressure?
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A. Total

B. Difference in static & dynamic

C. All A., B. and C.

D. Static

6573. For flow through an orifice from a reservoir, the actual velocity at the vena contracta is given by _________________?
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A. ?(2gh)

B. Cc ?(2gh)

C. C.V. ?(2gh)

D. Cd ?(2gh)

6574. Which of the following may be termed as a variable orifice flow-meter ?
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A. Pitot tube

B. Rotameter

C. All A., B. and C.

D. V-notch

6575. The dimension of dynamic viscosity is__________________?
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A. ML-1T-2

B. LT-2

C. L2T-1

D. ML-1T-1

6576. At a constant speed of the centrifugal pump, it?s _____________ the impeller diameter?
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A. Capacity varies directly with

B. Head varies as the square of

C. All A., B. and C.

D. Horsepower varies as the cube of

6577. Two liquids manometer is used for measuring small pressure differences in___________________?
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A. Gases

B. Liquids

C. None of these

D. Mixture of hydrocarbons

6578. The most important factor, which determines the maximum height to which water can be lifted by a pump at standard temperature is the_____________________?
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A. Barometric pressure

B. Speed of the impeller

C. Diameter of the impeller

D. Both B. and C.

6579. Which of the following has the minimum compressibility ?
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A. Nitrogen at room temperature

B. Air at room temperature

C. Water at room temperature

D. Oxygen at room temperature

6580. Hydraulic intensifier is used for increasing the ___________________?
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A. Intensity of pressure of the liquid

B. Rate of velocity of liquid supply

C. Momentum rate through delivery pipe

D. Rate of flow through delivery pipeline of a pump

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