chemical engineering chemical engineering basics MCQs – Page 13

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 Review each marked answer and report any item that may be outdated or unclear.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

241. Isotropic materials have the same _______________________ in all directions?
0

A. Thermal properties

B. Induced stresses

C. Density

D. Elastic properties

242. Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when_________________?
0

A. Strain rate is increased

B. Prior cold deformation is increased

C. Grain size is increased

D. Not affected by any of the above parameters

243. What is the value of included angle of a triangular notch for maximum discharge ?
0

A. 120

B. 60

C. 90

D. 30

244. Super conduction in metals is observed at a temperature of ________________ K?
0

A. About 373

B. <100

C. >100

D. About 273

245. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is___________________?
0

A. None of these

B. Patenting

C. Full annealing

D. Bright annealing

246. The burnout heat flux in the nucleate boiling regime is not a function of the_________________?
0

A. Liquid density

B. Temperature difference

C. Heat of evaporation

D. Vapour density

247. In the Bayers process, bauxite is digested under pressure using ___________________?
0

A. HCl

B. H2SO4

C. NH3

D. NaOH

248. Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?
0

A. Tinning

B. Sherardizing

C. Galvanising

D. None of these

249. The starting of a car takes time in winter, because the__________________?
0

A. Fuel supply for ignition is not sufficient

B. Octane number of fuel is decreased

C. Vaporisation of the fuel is decreased

D. Pour point of fuel decreases

250. Aluminium is extracted from____________________?
0

A. None of these

B. Bauxite

C. Galena

D. Chalcocite

251. Cobalt 60 is used as a source of _____________ in medical therapy & industrial radiography?
0

A. X-rays

B. ?-rays

C. ?-rays

D. ?-rays

252. ______________________ iron is produced by the annealing of white cast iron?
0

A. Grey

B. Ductile

C. Nodular

D. Malleable

253. The difference between gross & net calorific values of fuel is due to the___________________?
0

A. Heat carried away by the steam from the moisture content of the fuel

B. Heat lost by radiation

C. Sensible heat carried away by the flue gases

D. Heat carried away by steam from the combustion of hydrogen in the fuel

254. Induced draft fans provided in large thermal power plant boilers have __________________ blades?
0

A. Forward curved

B. Radial or straight

C. Backward curved

D. Double curved

255. Normalising of an object does not________________________?
0

A. Improve yield strength

B. Improve mechanical properties

C. Improve ductility

D. Refine coarse grain structure obtained during hot working

256. Reduction in the grain size reduces the _________________ of the material?
0

A. All A, B. & C

B. Tensile strength

C. Fatigue resistance

D. Creep resistance

257. Energy of the sun arises mainly from __________________ reactions?
0

A. Fusion

B. None of these

C. Fission

D. Combustion

258. A jig is used while __________________ a hole?
0

A. Drilling

B. Boring

C. Counter boring

D. Enlarging

259. Cascade control is___________________?
0

A. The continuous adjustment of the set point index of an automatic control loop by a primary(master) controller

B. Used when changes in process conditions cause serious upsets in the controlled variable

C. All A, B & C

D. Useful to control flow from temperature

260. _________________ is the most suitable lubricant for drawing mild steel wires?
0

A. Water

B. Kerosene

C. Sodium stearate

D. Lime water

Previous Next

Showing 241 to 260 of 767 mcqs