Chemical Engineering MCQs [Quiz 44]

Q1. Maximum permissible air velocity in pipelines is about __________ metre/second.
(A) 5
(B) 10
(C) 20
(D) 40

Q2. Hot working of lead is carried out at
(A) 75°C
(B) 373°K
(C) 150°C
(D) Room temperature

Q3. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?
(A) Styrofoam
(B) Lucite
(C) Perspex
(D) Plexiglass

Q4. The Al2O3 content of cryolite in Hall-Heroult cell is maintained between __________ percent.
(A) 2-5
(B) 18-20
(C) 12-15
(D) 6-12

Q5. Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.
(A) Annealing
(B) Toughening
(C) Work hardening
(D) Tempering

Q6. Fatigue resistance of a material is measured by the
(A) Elastic limit
(B) Ultimate tensile strength
(C) Young’s modulus
(D) Endurance limit

Q7. In a neutral solution
(A) H+ ions are absent
(B) OHions are absent
(C) Both H+ and OHions are present in very small but equal concentration
(D) None of these

Q8. Ultimate strength in tension as compared to that in shear for steel is
(A) Half
(B) One third
(C) One and half times
(D) One fourth

Q9. At 100% relative humidity, the dew point temperature of moist air is
(A) Less than the wet bulb temperature
(B) More than the wet bulb temperature
(C) Equal to the wet bulb temperature
(D) Equal to the ambient temperature

Q10. Dry saturated steam can be converted into superheated steam by
(A) Increasing its cross-sectional area of flow
(B) Passing it through a pressure reducing valve
(C) Forcing it downwards through a vertical tube
(D) None of these

Updated: 8th September 2019 — 8:55 PM

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