Basic Calculations in Chemical Engineering pdf - Set 56 - ObjectiveBooks

Basic Calculations in Chemical Engineering pdf - Set 56

Practice Test: Question Set - 56

1. Specific __________ is a dimensionless quantity.
    (A) Heat
    (B) Humidity
    (C) Weight
    (D) None of these

2. Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?
    (A) Anodising
    (B) Tempering
    (C) Carburising
    (D) Annealing

3. In the acid Bessemer process, the hot metal should have the following composition.
    (A) S < 0.05% and P < 0.05%
    (B) S < 0.05% and P < 1.5%
    (C) S < 0.05% and P > 1.5%
    (D) S > 1.5% and P < 0.05%

4. Electrochemical corrosion can occur, only if __________ is present in contact with metal.
    (A) Air
    (B) Oxygen
    (C) Liquid medium
    (D) Gaseous medium

5. A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to
    (A) √(Particle diameter)
    (B) Particle diameter
    (C) (Particle diameter)2
    (D) (Particle diameter)3

6. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
    (A) Red
    (B) Extended
    (C) Super
    (D) Extreme

7. Work study deals with the __________ study.
    (A) Time
    (B) Motion
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

8. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by
    (A) T1/(T1-T2)
    (B) T2/(T1-T2)
    (C) T1/T2
    (D) T2/T1

9. Gross national product (GNP) means the total value of __________ in a country.
    (A) Goods produced
    (B) Gold reserve
    (C) Earning of the citizens
    (D) Taxes paid

10. Blow off cock is provided in steam boiler to
    (A) Guard the boiler in case of abnormal rise in steam pressure
    (B) Drain out water and sludge during its repair
    (C) Regulate the supply of water in boiler
    (D) Put out the fire in the furnace when the water level in the boiler falls to unsafe limit

11. Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
    (A) Horizontal
    (B) Vertical
    (C) Inclined
    (D) Any

12. The most prominent single cause of corrosion in boiler-tubes, drums, economizers and steam superheaters in a thermal power plant boiler is the
    (A) Water alkalinity & leakage
    (B) Hydrazine addition during feed water treatment
    (C) Release of non-condensable gas from water in the boiler
    (D) Scale formation

13. 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)

14. __________ pipe is the most suitable for carrying sanitary drainage.
    (A) Stainless steel
    (B) Reinforced cement concrete
    (C) Cast iron
    (D) Asbestos cement

15. Holes for riveting purposes should be preferably made by
    (A) Cutting torch
    (B) Drilling
    (C) Punching
    (D) None of these

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