chemical engineering MCQs – Page 362

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 Review each marked answer and report any item that may be outdated or unclear.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
7221. Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its ______________________?
comments icon0

A. All A., B. and C.

B. High co-efficient of thermal expansion

C. Low thermal conductivity

D. High corrosion resistance
7222. Pure nickel is___________________?
comments icon0
A. Ferromagnetic at room temperature

B. Having h.c.p. crystal lattice

C. Not resistant to oxidation at high temperature

D. Ferromagnetic above its curie point (i.e., 415C)

7223. Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of_________________?
comments icon0

A. Copper

B. High carbon steel

C. Brass

D. Aluminium

7224. A magnetic material becomes ____________ above the Curie temperature?
comments icon0
A. Paramagnetic

B. Ferromagnetic

C. Diamagnetic

D. None of these

7225. Softening of hardened steel is done by its_____________________?
comments icon0

A. Carburising

B. Normalising

C. Tempering

D. Annealing

7226. Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and_________________?
comments icon0

A. Moving mercury and crimped steel wire

B. Moving mercury and graphite

C. Moving mercury and carbon

D. Graphite and moving mercury
7227. _____________ steel is widely used for the manufacture of motor car crankshafts?
comments icon0
A. Chrome

B. High speed

C. Silicon

D. Nickel

7228. Which of the following alloys does not contain nickel ?
comments icon0

A. Inconel

B. Chloro, et-2 alloy

C. Babbitt metal

D. Monel

7229. Carbon supply in pack carburising process is in the form of_____________________?
comments icon0
A. Charcoal

B. Calcium carbide

C. Graphite

D. Hydrocarbon oil

7230. Atmospheric corrosion of metals result from their________________?
comments icon0
A. Slow oxidation

B. Fast oxidation

C. Fast hydration

D. Slow dehydration

7231. _____________________ is used for determining the tensile strength of steels ?
comments icon0

A. None of these

B. Universal testing machine

C. Hydraulic press

D. Mechanical press

7232. Fatigue failure of a material may occur, when it is subjected to _____________ stress?
comments icon0

A. Compressive

B. Tensile

C. Torsion

D. Fluctuating
7233. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?
comments icon0
A. Silicon

B. Sulphur

C. Phosphorus

D. None of these

7234. Alpha iron is stable ______________ C?
comments icon0

A. Above 1403

B. Upto 910

C. Between 910 & 1403

D. Above 1800

7235. Galvanising (i.e., zinc coating) of steel sheets is done to______________________?
comments icon0

A. Prevent its rusting by contact with corrosive atmosphere

B. Protect the base metal by cathodic protection

C. Both A. & B.

D. Neither A. nor B.

7236. Stainless steel is not corroded by _____________________?
comments icon0

A. Sulphuric acid (10%)

B. Saturated brine

C. Hydrochloric acid (10%)

D. Nitric acid (10%)
7237. Invar contains the highest percentage of___________________?
comments icon0

A. Cobalt

B. Iron

C. Vanadium

D. Tungsten

7238. The heat treatment process to which castings and the steel balls produced by cold heading are subjected is____________________?
comments icon0

A. None of these

B. Normalising

C. Tempering

D. Annealing

7239. ______________ can replace tungsten in high speed steel ?
comments icon0
A. Molybdenum

B. Vanadium

C. Chromium

D. Cobalt

7240. Pick the odd man out of the following?
comments icon0

A. Nitriding

B. Calorising

C. Cyaniding

D. Pack carburising