A. Base and strong acid
B. Base and weak acid
C. Acid and weak base
D. None of these
✅ The correct answer is option A.
Engineering MCQs
A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is
A. 0
B. 0.33
C. 0.44
D. 0.25
✅ The correct answer is option C.
Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
A. White & rough
B. Black & rough
C. White & polished
D. Black & polished
✅ The correct answer is option B.
Rate of chemical reaction is not much affected, if the reactants are in __________ form.
A. Solids
B. Liquids
C. Either A or B
D. Gaseous
✅ The correct answer is option C.
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
A. Conduction
B. Radiation
C. Natural convection
D. Forced convection
✅ The correct answer is option B.
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
A. Cooled and dehumified
B. Heated and humidified
C. Cooled and humidified
D. Heated and dehumidified
✅ The correct answer is option C.
Faraday’s law of electrolysis is related to the
A. Cation speed
B. Atomic number of the cation
C. Equivalent mass of the electrolyte
D. None of these
✅ The correct answer is option C.
Which of the following is the most wear resistant grade of carbide used for the cutting tools?
A. Aluminium carbide
B. Tungsten carbide
C. Nickel carbide
D. Iron carbide
✅ The correct answer is option B.
Electrolytic reduction cell used for conversion of calcined Al2O₃ to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to
A. Achieve very high purity of aluminium (99.9%)
B. Keep the electrolyte in liquid condition by the generation of heat
C. Electrolytically dissociate alumina
D. Both(b) & (c)
✅ The correct answer is option D.
Percentage of gaunge is maximum in the ore of
A. Iron
B. Gold
C. Zinc
D. Copper
✅ The correct answer is option B.