Tag: evs

Questions Related to evs

Enzymatic filters are used for removing

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Nitrogen pollutants

  2. Chloride pollutants

  3. Hydrocarbons

  4. Lead

Show answer
Correct Option: C
Explanation:
Hydrocarbon Removal filters are designed to remove hydrocarbons and sediment contaminants from groundwater accumulation in bunded areas, outfalls or as part of any pollution preventative drainage solution on your site, where hydrocarbon risk entering the environment.
The contaminants are absorbed by the smart filtration technology which bond with the hydrocarbon molecules to efficiently encapsulate and solidify hydrocarbons internally in the cartridge.
This allows filtered groundwater to pass unimpeded through the filter.
So the correct answer is 'Hydrocarbons'.

Composting is carried out from

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Sewage sludge

  2. Rubbish

  3. Garbage and sewage sludge

  4. Industrial wastes

Show answer
Correct Option: C
Explanation:
Compost is the nutrient rich organic matter that is formed by the decomposition of plant and animal material. The process of making compost is called composting. The microbes break down the organic matter into humus that contains nutrients beneficial to plants. Compost is used to increase the fertility of the soil and aid the growth of plants. Compost can be made from various raw materials that are biodegradable. This include vegetable peels, kitchen waste, garbage and even sewage sludge too as it contains the bacteria that carry out the decomposition of organic matter.
So, the correct answer is 'Garbage and sewage sludge'.

Pyrolysis of wood yields

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Alcohol

  2. Charcoal

  3. Charcoal and wood gas

  4. Charcoal, wood gas, tar and oil

Show answer
Correct Option: D
Explanation:
Pyrolysis is the thermal composition of a material by heating it at a very high temperature. Pyrolysis of wood occurs at a temperature of  200–300 °C. Many products are formed from pyrolysis of wood like charcoal, tar, wood gas and wood oil. Charcoal is the residue left after burning of wood. It is rich in carbon. Wood gas and wood oil are used as fuels. Tar is a black liquid and used as filler in roads.
So, the correct answer is 'Charcoal, wood gas, tar and oil'.

Pyroligneous acid produced during pyrolysis of wood is

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Creosote

  2. Acetic acid

  3. Methyl alcohol

  4. Ammonia

Show answer
Correct Option: B

The buildings which do not have a sewage system can _____________.

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Construct drainage tanks

  2. Construct septic tanks

  3. Construct sewage water bodies

  4. Construct septic canals

Show answer
Correct Option: B
Explanation:

Septic tanks are underground tanks in which sewage is collected and allowed to decompose with the use of bacteria. Drainage tanks are used to remove water. Sewage pollutes the water bodies when directly discharged into water bodies like river. Septic canal is a tubular passageway for the disposal for sewage.

Thus, the correct answer is option B.

In compositing, volume of solid waste is

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Reduced

  2. Enhanced

  3. Burnt

  4. Removed

Show answer
Correct Option: A

Pollution due to sewage can be reduced by 

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. Creating separate chemical toilets.

  2. Constructing septic tanks.

  3. Letting off drainage in rivers.

  4. Both A and B.

Show answer
Correct Option: D
Explanation:
A very large fraction of our people defecates in the open, on dry riverbeds, on railway tracks, near fields and many a time directly in water. Untreated human excreta is a health hazard. It may cause water pollution and soil pollution. Both the surface water and groundwater get polluted.
  • A septic tank is an underground chamber made of concrete, fiberglass or plastic through which domestic wastewater flows for basic treatment. Settling and anaerobic processes reduce solids and organics, but the treatment efficiency is only moderate. Septic tank systems are a type of simple onsite sewage facility.
  • Chemical toilet is a toilet that is not connected to a sewage system but has a compartment in which waste is treated with chemicals for temporary storage.
  • Letting off drainage in rivers will cause water pollution.
So, the correct answer is 'Both A and B'

Which is correctly matched?
$1$. Arsenic poisoning- Black foot disease
$2$. Secondary Effluent treatment- Biological process
$3$. Pyrolysis- Solid soil waste disposal
$4$.

Tubifex- Water pollution indicator


$5$. Biomagnification - Degradable pollutants

evs garbage in, garbage out preparation of compost sewage disposal solid waste management

  1. $1, 2, 3, 5$

  2. $1, 3, 4, 5$

  3. $2, 3, 4, 5$

  4. $1, 2, 3, 4$

  5. $1, 2, 4, 5$

Show answer
Correct Option: D
Explanation:
  1. Arsenic poisoning causes black foot disease as arsenic is a carcinogen that results in darkening of the skin and abdominal issues.
    2. Secondary treatment to the effluents involves a biological process in which the organic matter in the effluent is decomposed by the bacteria and fungi.
    3. Pyrolysis is the process in which the solid soil is subjected to the high temperature to decompose it into ash.
    4. Tubifex is a roundworm that can sustain the polluted water that has low levels of dissolved oxygen and heavy metal deposition. So, its growth in any water body indicates water pollution.
    5. Biomagnification is the ability of the non-degradable pollutants to stay in the adipose tissues of the living organisms and persist in higher concentration.
    Hence, the correct answer is '1,2,3,4'.

Under whose leadership Hindustan Republican Association changed its title to Hindustan Socialist Republican Association?

evs nation's pride story of great people contribution of revolutionary organisation in freedom movement revolutionary movement and important revolutionaries

  1. Chandrasekhar Azad

  2. Aurobindo Ghosh

  3. Udham Singh

  4. Khudiram Bose

Show answer
Correct Option: A
Explanation:

Under Chandrasekhar Azad's leadership, Hindustan Republican Association changed its title to Hindustan Socialist Republican Association.

When did a 18ft tall bronze statue of Bhagat Singh installed in the parliament of India?

evs nation's pride story of great people contribution of revolutionary organisation in freedom movement revolutionary movement and important revolutionaries

  1. 23 January 2008

  2. 15 August 2008

  3. 27 September 2008

  4. 26 January 2009

Show answer
Correct Option: B
Explanation:

On 15 August 2008, an 18-foot tall bronze statue of Singh was installed in the Parliament of India, next to the statues of Indira Gandhi and Subhas Chandra Bose.  A portrait of Singh and Dutt also adorns the walls of the Parliament House.