chemical engineering chemical engineering basics MCQs – Page 14

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 Review each marked answer and report any item that may be outdated or unclear.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
261. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?
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A. Maintaining vacuum on tube side is more difficult than that on the shell side

B. ause of its lower specific volume compared to steam

C. Water velocity can be increased conveniently to increase the overall heat transfer co-efficient

D. Compared to the mass flow rate of cooling water, the rate of condensation of steam is

E. ariably smaller

F. Condenser can act as a storage unit for condensed steam

262. Lead is poured into the joints between two ___________________ pipes?
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A. Steel

B. Plastic

C. Concrete

D. Cast iron
263. Powder metallurgy is used to produce__________________?
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A. Components of such alloys whose constituents do not form alloys readily

B. Components of large size

C. Porosity free components

D. High precision components with complex cavities and sharp features

264. In troposphere (the weather domain), the temperature t at height h above the sea level in metres is given by (where, temperature at sea level is 15C and t is in C.) ?
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A. t = 15 0.0035 h

B. t = 0.0035 h 15

C. t = 15 + 0.0065 h

D. t = 15 0.0065 h
265. Direct conversion of thermal energy to electrical energy is facilitated by the____________________?
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A. Magneto hydrodynamic generator

B. Fuel cells

C. Photo voltaic cell

D. None of these

266. A material in which the atoms are arranged regularly in some directions but not in others, is termed as mesomorphous material; an example of which is_________________?
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A. Lead

B. Silver

C. Glass

D. Mica

267. One ton of refrigeration is not equivalent to the heat removal rate of ____________________?
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A. 50 kcal/minute

B. 3.5 KW

C. 50 kJ/sec

D. 200 BTU/minute

268. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as______________________?
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A. Re-0.8, Re0.5

B. Re0.5, Re0.8

C. Re0.8, Re-0.5

D. Re0.8, Re0.5
269. Primary designation of steel is based on its__________________?
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A. Carbon content

B. Hardness & tensile strength

C. Iron content

D. Alloying elements content
270. In the blast furnace, incorporation of water vapour in the blast gives the following effect ?
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A. No significant change occurs

B. Increases the hydrogen content in the metal

C. Increases the flame temperature

D. Increases the reducing potential of the gas
271. Suitability of steel for its use in cable is judged by its strength in__________________?
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A. Compression

B. Shear

C. Tension

D. Torsion

272. Which of the following does not have a sharp melting point ?
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A. Pig iron

B. Ice

C. Thoria

D. Glass
273. Fire refining process is employed in case of___________________?
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A. Copper

B. Tin

C. Zinc

D. Aluminium

274. Copper deposits are found in India at the following location ?
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A. Ramagundam

B. Kudremukh

C. Kolar

D. Khetri
275. ____________ test is the appropriate test to determine whether a material is ductile or brittle ?
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A. Impact

B. Tensile

C. Hardness

D. Cupping

276. The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is__________________?
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A. Less

B. More

C. More but less than the diameter of bolt

D. Same

277. Dies for wire drawing are generally made of__________________?
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A. Carbides

B. Mild steel

C. High carbon steel

D. Stainless steel

278. The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the Curie temperature. Its value for cobalt is ______________ C?
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A. 768

B. 1480

C. 1127

D. 1359

279. _____________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500C ?
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A. Supermax

B. Borosilicate

C. Lead

D. High silica

280. __________________ fluid force is not considered in the Navier-Stokes equation?
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A. Gravity

B. Pressure

C. Viscous

D. Turbulent