chemical engineering MCQs – Page 314

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 Review each marked answer and report any item that may be outdated or unclear.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
6261. A piezometer provided in the pipe measures__________________?
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A. Friction factor

B. Static pressure

C. None of these

D. Dynamic pressure

6262. Which is not a natural insulating material ?
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A. Vermiculite

B. Asbestos

C. Diatomaceous earth/kieselgur

D. None of these
6263. The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge) ?
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A. Q1/Q2

B. (Q2 Q1)/Q2

C. (Q2 Q1)/Q1

D. Q2/Q1

6264. For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance) ?
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A. V/Vmax = (r/x)1/7

B. V/Vmax = (x.r)1/7

C. None of these

D. V/Vmax = (x/r)1/7
6265. Slugging occurs in a fluidised bed, if the bed is___________________?
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A. Narrow

B. Deep

C. Both A. & B.

D. Neither A. nor B.

6266. Piezometric head is the sum of the ______________ heads?
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A. Kinetic energy & pressure

B. Elevation & pressure

C. Elevation & kinetic energy

D. None of these

6267. Gradually varying fluid flow is an example of ____________ flow?
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A. Steady uniform

B. Steady non-uniform

C. Non-steady non-uniform

D. Non-steady uniform
6268. Hydraulic _____________ works on the principle of Pascals law of transmission of fluid pressure?
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A. Coupling

B. Turbine

C. Pump

D. Press
6269. Two piping system are said to be equivalent, when the ______________ are same?
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A. Length & diameter

B. Length & friction factor

C. Diameter & friction factor

D. Fluid flow rate & friction loss
6270. In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?
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A. 1.8 Vavg

B. Vavg

C. 1.5 Vavg

D. 1.2 Vavg
6271. Shear stress in a fluid flowing in a round pipe_________________?
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A. Remains constant over the cross-section

B. Varies parabolically across the cross-section

C. Is zero at the centre and varies linearly with the radius

D. Is zero at the wall and increases linearly to the centre

6272. For a stable equilibrium of a submerged body (where, G and B are centres of gravity & buoyancy respectively) ?
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A. None of these

B. G is above B

C. B is above G

D. B & G coincide

6273. The frictional resistance in laminar flow does not depend on the_________________?
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A. Flow velocity

B. Pressure of flow

C. Fluid temperature

D. Area of surface in contact
6274. A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is _____________ kg?
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A. 100

B. 1000

C. 10

D. 10000

6275. An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic ?
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A. Sewage sludge

B. Rubber latex

C. Blood

D. Sugar solution

6276. A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the power consumed now will be _____________ hp?
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A. 2

B. 1

C. 4

D. 0.5
6277. Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) ?
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A. H = 1840 D0.5/N

B. D = 1840 H0.5/N

C. D = 1840 N/H0.5

D. D = 1840 H/N

6278. For the transfer of solution of thick slurry, the pump used is a _____________ pump?
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A. Centrifugal

B. Diaphragm

C. Reciprocating

D. Gear

6279. What is the unit of kinematic viscosity in SI unit ?
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A. None of these

B. M2/sec

C. Kg. sec/m

D. N/m2. sec

6280. A fluid element has a velocity V = -y2. xi + 2yx2 . j. The motion at (x, y) = (1/?2, 1) is_________________?
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A. Rotational and incompressible

B. Irrotational and compressible

C. Rotational and compressible

D. Irrotational and incompressible