chemical engineering fluid mechanics for chemical chemical engineering MCQs – Page 10

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 Review each marked answer and report any item that may be outdated or unclear.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
181. Gear pump_________________?
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A. Is a centrifugal pump

B. Is a positive displacement pump

C. Is a non-positive displacement pump

D. Can be started with delivery valve closed

182. Diaphragm pumps are used to transport_________________?
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A. Slurries

B. Fluids

C. Liquids

D. Solids

183. Vane anemometer __________________?
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A. ersed</strong>

B. None of these

C. Is a variable head meter

D. Rotates an element at a speed determined by the velocity of the fluid in which the meter is

E. Is an area meter

184. Power number is the ratio of____________________?
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A. Drag stress to inertial stress

B. Gravitational stress to drag stress

C. Inertial stress to drag stress

D. Inertial stress to gravitational stress

185. 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. Irrotational and compressible

B. Rotational and compressible

C. Rotational and incompressible

D. Irrotational and incompressible

186. Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss ?
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A. Flow nozzle

B. Rotameter

C. Venturimeter

D. Orificemeter

187. Gradually varying fluid flow is an example of ____________ flow?
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A. Non-steady uniform

B. Non-steady non-uniform

C. Steady non-uniform

D. Steady uniform

188. Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a _________________?
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A. None of these

B. Rotameter

C. Pitot tube

D. Manometer

189. The unit of velocity head is_________________?
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A. ft-lbf/sec

B. ft-lb/sec

C. ft-lbf/lb

D. ft-lb/ft3

190. The peripheral velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec?
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A. 12.4

B. 186.2

C. 1.8

D. 736.4

191. Centrifugal pump cant be used to pump _____________________?
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A. Moderately viscous vegetable oil used in soap industry

B. None of the above

C. Thick molten soap at 80C

D. Molten sodium (used as a coolant in Fast Breeder Reactor)

192. 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. 10000

B. 10

C. 1000

D. 100
193. Steady uniform flow is represented by flow through a/an ___________________?
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A. Expanding tube at constant rate

B. None of these

C. Long pipe at decreasing rate

D. Long pipe at constant rate
194. What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe) ?
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A. 0.5

B. 1

C. 1.5

D. 2
195. Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump?
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A. Plunger

B. Reciprocating

C. Electromagnetic

D. Gear

196. Molten soap mass is transported by a ______________ pump?
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A. Reciprocating

B. Gear

C. Diaphragm

D. Centrifugal
197. Rise of liquid in a capillary tube is due to_________________?
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A. Cohesion

B. Adhesion

C. Both A. & B.

D. Neither A. nor B.

198. Disc compensators are provided in large diameter fuel gas carrying pipelines to_________________?
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A. Account for the pressure variation side the pipeline

B. Make the pipe joint leak-proof

C. Keep the pipe in proper orientation

D. Account for contraction/expansion of pipe due to temperature changes of the surroundings
199. The capillary rise of mercury is maximum in glass tube of dia _____________ mm?
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A. 0.5

B. 1

C. 2

D. 5

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

B. Be quadrupled

C. Remain same

D. Decrease