Chemical Process in Waste Water Treatment Online Test - Set 38 - ObjectiveBooks

Chemical Process in Waste Water Treatment Online Test - Set 38

Practice Test: Question Set - 38

1. High acid value of an oil or fat is an indication of
    (A) Storage under improper conditions
    (B) Absence of unsaturation
    (C) Its smaller molecular weight
    (D) None of these

2. Trinitrotoluene (TNT), an explosive, is made by the nitration of
    (A) Nitrobenzene
    (B) Toluene
    (C) Nitrotoluene
    (D) Benzene

3. Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
    (A) Reverse osmosis
    (B) Sand filter
    (C) Lime soda
    (D) Permutit

4. __________ is used as a catalyst in fat splitting.
    (A) ZnO
    (B) Ni
    (C) V2O5
    (D) FeO

5. __________ is produced using molasses as the starting raw material.
    (A) Methyl alcohol
    (B) Ethyl alcohol
    (C) Benzol
    (D) Dimethyl ether

6. In the production of soda ash by Solvay process, the by-product is
    (A) CaCl2
    (B) NH4Cl
    (C) NH3
    (D) NaOH

7. How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
    (A) 500°C
    (B) 750°C
    (C) 1000°C
    (D) 1500°C

8. Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
    (A) Hard
    (B) Soft
    (C) Metallic
    (D) Lubricating

9. Vulcanization of rubber
    (A) Decreases its tensile strength
    (B) Increases its ozone & oxygen reactivity
    (C) Increases its oil & solvent resistance
    (D) Converts its plasticity into elasticity

10. Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?
    (A) Xanthates
    (B) Stearic acid
    (C) Calcium & aluminium stearate
    (D) Formic acid

11. Hydrazine is largely used
    (A) As a starting material for 'hypo'
    (B) In photographic industry
    (C) As rocket fuel
    (D) In printing industry

12. The product obtained on mixing calcium oxide with water is called
    (A) Quicklime
    (B) Slaked lime
    (C) Milk of lime
    (D) None of these

13. Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction
    (A) Decreases with decrease of thickness of the flakes
    (B) Increases with the increasing flake size keeping the flake thickness constant
    (C) Increases considerably with the rise of temperature
    (D) Decreases as the moisture content of flakes increases

14. Zeolite used in water softening process (cation exchange) is regenerated by washing with
    (A) Brine
    (B) Chloramines
    (C) Sodium bisulphite
    (D) Liquid chlorines

15. Bromine content in sea water may be around __________ ppm.
    (A) 70
    (B) 640
    (C) 1875
    (D) 2500

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