Question: Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
A.Neutralised by alkali treatment
B.Left as such without any treatment
C.Diluted with fresh water to reduce its acidity
D.None of these
Answer: Option A

Submit Answer & Explaination

Earn Reward Points by submitting Detailed Explaination for this Question

More Questions on This Topic :

Question 1. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
  1.    3
  2.    30
  3.    70
  4.    100
Answer: Option A
Question 2. Exposure to chemicals having carcinogenic properties cause
  1.    Dermatitis (skin disorder)
  2.    Cancer
  3.    Asphyxiation (suffocation)
  4.    Asthma
Answer: Option B
Question 3. Beyond what concentration of H₂S in air, acute danger to human life exists?
  1.    50 ppm
  2.    100 ppm
  3.    300 ppm
  4.    700 ppm
Answer: Option D
Question 4. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
  1.    Hydrogen
  2.    Carbon dioxide
  3.    Ozone
  4.    None of these
Answer: Option C
Question 5. Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)
  1.    Acts as a green house gas thereby raising earth's temperature
  2.    Causes asphyxia
  3.    Causes increase in sea level
  4.    Inhances the green house effect
Answer: Option B
Question 6. What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?
  1.    Radioactive substances
  2.    Natural organic products
  3.    Inorganic pollutants
  4.    None of these
Answer: Option B

Check all Questions in this Topic : Click HERE

Recent Questions

Q. The Mean Effective Pressure Of The Compressor Is The....Q. A Closely Coiled Helical Spring Is Acted Upon By An Axial Fo....Q. Assertion (A): Existence Of Human Life On Venus Is Highly Im....Q. The Relation Between Number Of Links (l) And Number Of Joint....Q. Silicone Is A Polymer Of....Q. With An RL Integrator, At The Instant Of The Rising Pulse Ed....Q. In An Exploded Assembly Drawing It Is Customary For The Draf....Q. It Is Advantage Of Giving Home Work That Students....Q.  the Circumference Of A Circle Exceeds The Diameter By 20 C....Q. A Flow In Which The Quantity Of Liquid Flowing Per Second Is....Q. If The Temperature Of A Crystal Diode Increases, Then Leakag....Q. Which Memory Stores The Values Of Variables.....Q. In The Emerson Efficiency Plan, A Worker Receives Only His D....Q. Find Out That Word, The Spelling Of Which Is Wrong.....Q. When Adding Dimensions To An Auxiliary View It Will Be Neces....Q. Under Which Concept, Recognition Of Expenses Must Be Made In....Q. An Inverted Siphon Is Designed Generally For....Q. A Person Who Is Always Dissatisfied....Q. The Unbalanced Force Due To Reciprocating Masses....Q. If √(1−x2n)+√(1−y2n)=a(xn−....Q. __________ Is Used For Determining The Tensile Strength Of S....Q. Pure Inductive Circuit....Q. Crop Variety Improvement Is Done To Achieve Which Of The Fol....Q. Land So Surrounded By Water As To Be Almost An Island....Q. P : With An Idea To Reach The Deprived Child Q : By The Unit....Q.  the Ratio Between The Length And The Breadth Of A Rectangu....Q.  Match The Following:    [5 MARKS] ....Q. The EXCLUSIVE - NOR Gate Is Equivalent To An _____ Gate Foll....Q. A Shaft Has An Attached Disc At The Centre Of Its Length. Th....Q. In Which Of The Vedas Have Magical Charm And Spells Been Des....Q. A New Presentation Can Be Created From....Q. What Is The Simple Annual Growth Rate Of Patients From 2007 ....Q. Not ……………….. Milk Is Required To Prepare This Di....Q. Three-tier Architecture Includes Which Of The Following?....Q. Which Of The Following Property Defines The Border-width, Bo....Q. Find Out That Word, The Spelling Of Which Is Wrong.....Q. Find The Next Two Figures In The Given Pattern: ....Q. One Of Your Student Is Too Poor To Buy A Book. How Will You ....Q. It Will Take Two Hours To Walk Across The Forest.....Q. MBE Is A Technique Of Management....Q. Reynolds Number Is The Ratio Of....Q. Which Of The Following Figures Satisfy The Following Proper....Q. Working Of Safety Fuses Depends Upon1. Magnetic Effect Of Th....Q. Two Alternatives Can Produce A Product. First Have A Fixed C....Q. An Npn Bjt Has Gm=38ma/v, Cµ =10¯14 F, Cπ =10¯13f And Dc....Q. Blading Efficiency Is Also Known As....Q. It Is The Prime Minister's Prerogative To Appoint Or Dismiss....Q. What Will Be The Output Of The Following PHP Code ?....Q. What Is The Maximum Period Upto Which A Proclamation Issued ....Q.  the Clock Rate Of A Processor Is Measured In....