chemical engineering MCQs – Page 17

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

321. A solar cell converts the sunlight directly into ______________ energy?
0

A. Mechanical

B. Chemical

C. Thermal

D. Electrical

322. In connection with corrosion of metals, passivation is the process that__________________?
0

A. Changes the composition of the metal

B. Inhibits further deterioration

C. None of these

D. Intensifies deterioration

323. Dry saturated steam can be converted into super heated steam by____________________?
0

A. Passing it through a pressure reducing valve

B. Forcing it downwards through a vertical tube

C. Increasing its cross-sectional area of flow

D. None of these

324. In TIG welding, thoriated tungsten electrodes are used, because it ____________________?
0

A. Has better electron emissivity

B. Is stronger than ordinary tungsten

C. Has higher current carrying capacity

D. Is easy to prepare

325. Maximum consumption of limestone is in the ____________________ industry?
0

A. Cement

B. Glass

C. Fertiliser

D. Iron and steel

326. Ferromagnetic materials owe their properties to __________________ inner sub-shells ?
0

A. Partially filled

B. Equally filled

C. Vacant

D. Completely filled

327. A spring material should have low__________________?
0

A. Fatigue resistance

B. Deflection value

C. None of these

D. Elastic limit

328. The product (s) of roasting of a sulphide ore is (are) ?
0

A. Sulphate only

B. Dependent on temperature and partial pressure of oxygen & sulphur dioxide

C. Oxide only

D. Oxide and sulphate

329. Vernier calipers cannot be used to measure the______________________?
0

A. I.D. & O.D. of the shaft

B. Clearance between two mating surfaces

C. Depth of holes

D. Thickness of parts

330. A pycnometer is used for the measurement of________________________?
0

A. Specific gravity of a liquid

B. Composition of alloys

C. Flow rate of molten metal

D. Concentration of a solution

331. Brazing is the joining of metals_____________________?
0

A. Without melting the base metal

B. With a non-ferrous filler

C. Both A. & B.

D. Neither A. nor (B)

332. Heat flow across a hollow sphere of inner radius r1 and outer radius r2 is directly proportional to__________________?
0

A. r1. r2/(r2 + r1)

B. (r2 r1)/r1. r2

C. (r2 + r1)/r1. r2

D. r1. r2/(r2 r1)

333. Which of the following is the largest quantum of pressure ?
0

A. 1 kg/cm2

B. 1 atmosphere

C. 1 kilo Pascal

D. 1 bar

334. Maximum hardenability of steel depends upon its_______________________?
0

A. Chemical composition

B. Grain size

C. Alloying elements content

D. Carbon content

335. The following type of bonding is strongly directional in solids ?
0

A. Ionic

B. Metallic

C. Vander Waals

D. Covalent

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

A. Enlarging

B. Boring

C. Drilling

D. Counter boring

337. The boiling & freezing points on a newly defined temperature scale in degree D are 400D & 100D respectively. The temperature reading corresponding to 60C on this new temperature scale will be equal to _____________ D ?
0

A. 140

B. 280

C. 180

D. 240

338. 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_________________?
0

A. Lead

B. Silver

C. Mica

D. Glass

339. Stainless steel is welded with difficulty because of____________________?
0

A. Oxide film formation

B. Its high melting temperature

C. Chances of cracking

D. Chromium carbide formation

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

A. Grey

B. Ductile

C. Nodular

D. Malleable

Previous Next

Showing 321 to 340 of 8709 mcqs