chemical engineering chemical engineering basics MCQs – Page 17

Practise multiple-choice questions from chemical engineering chemical engineering basics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs
321. A solar cell converts the sunlight directly into ______________ energy?
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A. Chemical

B. Electrical

C. Thermal

D. Mechanical

322. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the________________?
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A. Creep strength

B. Endurance limit

C. Resilience

D. Fatigue strength

323. The delivery pressure of boiler feed water pump compared to the boiler steam pressure is___________________?
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A. Much more

B. Slightly more

C. Same

D. Slightly less

324. Fog is an example of colloidal system of___________________?
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A. Solid dispersed in liquid

B. Gas dispersed in liquid

C. Solid dispersed in gas

D. Liquid dispersed in gas
325. For a first order chemical reaction, the concentration of the reactant decreases __________________ with time?
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A. Inversely

B. Linearly

C. Logarithmically

D. Exponentially

326. Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is___________________?
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A. Cobalt

B. Platinum

C. Nickel

D. Vanadium

327. When an isolated thermodynamic system executes a process ___________________?
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A. No chemical reaction takes place within the system

B. Heat transfer takes place

C. Work is done

D. Mass flow occurs across the boundary of the system

328. During sensible cooling of air, its wet bulb temperature ?
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A. Increases & the dew point decreases

B. Increases but dew point remains constant

C. Decreases but dew point remains constant

D. Decreases & the dew point increases

329. The type of pump used for lifting large quantity of sewage is a _________________ pump ?
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A. Gear

B. Reciprocating

C. Centrifugal

D. Plunger

330. The main constituent of bones is ______________________?
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A. Ca3(PO4)2

B. CaF2

C. CaCO3

D. CaCl2

331. Which of the following is the largest quantum of pressure ?
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A. 1 kg/cm2

B. 1 bar

C. 1 atmosphere

D. 1 kilo Pascal

332. A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?
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A. 6

B. 18

C. 52

D. 38

333. Faradays law of electrolysis is related to the____________________?
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A. Atomic number of the cation

B. None of these

C. Equivalent mass of the electrolyte

D. Cation speed

334. Moist air is cooled along the line of constant ________________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs ?
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A. Relative humidity

B. Enthalpy

C. Dew point temperature

D. Wet bulb temperature

335. Which of the following gases cause global warming ?
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A. Carbon monoxide

B. Nitrogen

C. Ozone

D. Carbon dioxide
336. An alloy of Fe 0.4 % C is__________________?
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A. Cast iron

B. Hyper-eutectoid steel

C. Hypo-eutectoid steel

D. Eutectoid steel

337. Probability of cavitation occuring becomes very high, when the local _______________ resulting ?
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A. Pressure becomes very high

B. water bubbles formation, which on rupture cause cavitation

C. All A, B & C

D. Pressure falls below the vapour pressure

E. Temperature becomes low

338. In extrusion of metals, which of the following statement is true ?
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A. Redundant work is a function of the die angle

B. Speed of the extruded material is same as that of ram speed

C. Hollow ram is used for indirect extrusion

D. Relative motion between the billet surface and the container wall is always present

339. Which of the following does not discharge the dust collected as a dry solid?
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A. Wet scrubber

B. Gravity settling chamber

C. Bag filter

D. Electrostatic precipitator

340. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about ____________ MeV?
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A. 2000

B. 500

C. 200

D. 20