Practice Test: Question Set - 01
1. What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillery, dairy and meat packing industries?
- (A) Radioactive
substances
- (B) Natural
organic products
- (C) Inorganic
pollutants
- (D) None of
these
2. 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) Neutralized
by alkali treatment
- (B) Left
as such without any treatment
- (C) Diluted
with fresh water to reduce its acidity
- (D) None
of these
3. If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
- (A) 50
- (B) 500
- (C) 1000
- (D) 3000 (i.e.
0.3%)
4. Ringelmann chart is used for the measurement of the
- (A) Combustibles
present in automobile exhaust
- (B) Smoke
density from a chimney
- (C) Exhaust
gas density
- (D) Flue
gas temperature
5. The permissible color for domestic water supply is __________ ppm.
- (A) 1
- (B) 20
- (C) 100
- (D) 1000
6. Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
- (A) Fire
hazards
- (B) Explosion
hazards
- (C) Persistent
foam
- (D) Depletion
of dissolved oxygen
7. Out of the following, TLV of __________ is the minimum (about 0.02 ppm).
- (A) Phosgene
- (B) Bromine
- (C) MIC (Methyl
isocyanate)
- (D) Ozone
8. Smog is not formed due to the presence of __________ in the atmosphere.
- (A) SO2
- (B) NOx
- (C) CO2
- (D) Any of these
9. Average human body contains about __________ percent water by weight.
- (A) 20
- (B) 40
- (C) 70
- (D) 85
10. There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
- (A) Mercury
- (B) Arsenic
- (C) Aluminium
- (D) Lead
11. Arsenic pollutant is not generated in __________industries.
- (A) Tanneries
- (B) Glass
& ceramic
- (C) Beverages
- (D) Any
of these
12. Pick out the wrong statement.
- (A) The
concentric layer in atmosphere which contains about 70% of the total mass of
atmosphere and characterized by a steady decrease in temperature is called
stratosphere
- (B) Stratosphere
is rich in ozone and is located just above the troposphere
- (C) Troposphere
is a turbulent dusty zone containing much of water vapor and clouds
- (D) The
earth's atmosphere is an envelope of gases extending upto a height of about 200
kms
13. The pH value of oxidized sewage is about
- (A) 1.8
- (B) 6.2
- (C) 7.3
- (D) 13.4
14. On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
- (A) Of
clotting of blood
- (B) Of
jamming of respiratory tract
- (C) It
forms carboxyhemoglobin
by combining with haemoglobin of blood, thereby making it incapable of
absorbing oxygen
- (D) It
forms CO2 by combining with oxygen present in the blood
15. Growth of __________ is promoted by the presence of manganese in water.
- (A) Files
- (B) Algae
- (C) Micro-organisms
- (D) Mosquitoes