chemical engineering fluid mechanics for chemical chemical engineering MCQs – Page 9

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 Review each marked answer and report any item that may be outdated or unclear.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
161. Most of the centrifugal pumps used in chemical plants are usually ____________________ driven?
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A. Gas turbine

B. Electric motor

C. Steam

D. Diesel engine

162. Diaphragm valves are used for handling _______________ fluids?
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A. Non-Newtonian

B. Corrosive

C. Solid suspended

D. Viscous

163. A stream tube is that, which has ______________________ cross-section entirely bounded by stream lines?
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A. Any convenient

B. A large

C. A small

D. A circular

164. A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of _______________ shape?
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A. Rectangular

B. Trapezoidal

C. Circular

D. Triangular

165. Which of the following is used for pumping crude oil from oil well ?
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A. Single stage centrifugal pump

B. Gear pump

C. Screw pump

D. Duplex/triplex reciprocating pump
166. The energy equation, E + (p/?) + (V2/2g) + gZ = constant (E = internal energy/mass), is applicable to___________________?
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A. Perfect gases only

B. Adiabatic unsteady flow of gases

C. All compressible fluids

D. Isothermal flow of gases

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

B. Long pipe at constant rate

C. Expanding tube at constant rate

D. Expanding tube at increasing rate
168. The distance between metacentre and ______________ is called metacentric height?
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A. None of these

B. Centre of gravity

C. Water surface

D. Centre of buoyancy

169. Laminar flow is characterised by the nonexistence of_________________?
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A. Pressure fluctuation

B. Eddies

C. All A., B. & C.

D. Deviating velocities

170. The exit cone angle in case of a standard Venturimeter is _____________ the entrance cone angle?
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A. Equal to

B. Either A. or B.

C. Smaller than

D. Greater than

171. Multistage compressors are used in industry, because they____________________?
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A. Resemble closely to isothermal compression

B. Reduce the cost of compressor

C. Are easy to control

D. Reduce the size requirement

172. A piezometer opening measures the _____________ fluid pressure?
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A. Total

B. Dynamic

C. Undisturbed

D. Static

173. The uniformity of a gas fluidised bed depends upon the _______________ of the solid particles?
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A. Size

B. Surface properties

C. Both A. and B.

D. Neither A. nor B.

174. The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the___________________?
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A. Priming

B. Static submergence

C. Cavitation sensitivity

D. Net positive suction head (NPSH)
175. Fanning friction factor is equal to (where, fB = Blasius friction factor) ?
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A. fB/2

B. 4fB

C. fB/4

D. 2fB

176. Hot wire anemometer is used to measure the_________________?
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A. Velocity of gases

B. Pressure of liquids

C. Temperature of liquids

D. Velocity of liquids

177. Horsepower requirement for given pump capacity depends upon the_______________?
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A. Specific gravity of the liquid

B. Discharge head

C. All A., B. and C.

D. Suction lift

178. For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is___________________?
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A. More

B. Less

C. Equal

D. Either A. or B.; depends on the viscosity of the fluid

179. To handle smaller quantity of fluid at higher discharge pressure, use a ______________ pump?
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A. Rotary vacuum

B. Centrifugal

C. Volute

D. Reciprocating
180. If the discharge of a centrifugal pump is throttled, then its suction lift_______________________?
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A. Increases

B. Data insufficient to predict

C. Decreases

D. Remains unchanged