Tag: evs

Questions Related to evs

What does a red traffic light signify?

evs life is precious road safety and pollution personal health care disaster

  1. Stop

  2. Move fast

  3. Slow down

  4. None of the above

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Correct Option: A
Explanation:

Traffic Signals. 

RED—A red signal light means STOP. 

Erythroblastosis foetalis is a disease in which

evs life is precious road safety and pollution personal health care disaster

  1. adult has severe anaemia and jaundice

  2. foetus do not survive due to erythrocyte blast

  3. foetus is suffering from blood cancer

  4. foetus has severe anaemia and jaundice

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Correct Option: D
Explanation:
Erythroblastosis fetalis is a condition which arises when a female is rhesus negative and the mail is Rh positive.
It causes the death of the foetus within the womb or just after birth.
The child from such a couple inherits the Rh positive trait from the father. 
The Rh-positive red blood corpuscles of a foetus in the womb enter the blood of the mother where the development of Rh antibodies takes place as the mother's blood is rhesus negative it causes more harm to her. 
These antibodies along with the mother's blood on reaching the fetal circulation cause the clamping of fetal RBC. The first child is born normal because by that time the number of antibodies in mothers that remain lesser but they increase with successive pregnancy
So, the correct option is 'foetus has severe anaemia and jaundice'

Which of the following groups contains only easily biodegradable items?

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

  1. Grass, flower and leather

  2. Grass, wood and plastic

  3. Fruits, peel cake and lime juice

  4. Cake, wood and grass

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Correct Option: A,C,D
Explanation:
Biodegradable items can be degraded into simpler molecules by the action of microbes. These include grass, flowers, leather, wood, fruit peels, cake, lime juice etc. All these items can be decomposed by microorganisms.
Plastic is non-biodegradable as it can't be decomposed by the action of microorganisms and thus, it remains in nature for a long period of time.
So, the correct answer is option A, C and D. 

Safai karamcharis collect the garbage in trucks and take it to a low lying open area. This area is called as

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

  1. Dust bin

  2. Garbage

  3. Landfill

  4. Waste

Show answer
Correct Option: C
Explanation:

Safai karamcharis collect the garbage in trucks and take it to a low lying open area, called a landfill.

So, the correct answer is 'landfill'

Which of the following action or activity may causes undesirable effect to our environment?
i)  Catching and keeping animals such as bird and cats at home.
ii) Feeding birds such as pigeon and crows in our neighbourhood.
iii) Burning unwanted plastic product in our neighbourhood o reduce non - biodegradable rubbish.
iv) Dumping biodegradable refuse such as fruit skins and bones in our sewage to make the water nutrients rich for healthy growth of flowering plants.

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

  1. iii and iv only

  2. ii and iv only

  3. ii, iii and daily

  4. i, ii, iii and D

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Correct Option: A
Explanation:
iii) Burning unwanted plastic product in our neighbourhood or reduce non-biodegradable rubbish.
  • Burning of plastic causes air pollution due to the release of nitrogen oxides, sulphur dioxides and other particulate matter into the atmosphere.
iv) Dumping biodegradable refuse such as fruit skins and bones in our sewage to make the water nutrients rich for healthy growth of flowering plants.
  • The above activity causes an undesirable effect on the environment.
  • So, the correct answer is 'iii and iv only'.

Which of the following is the method of controlled aerobic combustion of wastes inside chambers at temperatures as high as 900$^0$-1300$^0$C?

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

  1. Sludge burning

  2. Pyrolysis

  3. Incineration

  4. Source reduction

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Correct Option: C
Explanation:

Incineration is the process of oxidation of combustible substance present in the waste (which is heterogeneous material like minerals, metals etc.). The waste is treated to reduce its volume, convert that into useful form of energy. At a temperature of 900 to 1300$^0$ C, the organic substances in the waste will burn and release energy. So, the correct answer is 'Incineration'.

Combustible and non combustible solid waste, excluding food waste, known as

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

  1. Rubbish

  2. Garbage

  3. Solid material

  4. Animal Waste

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Correct Option: A

What is an approximate percentage of dissolved solid in seawater?

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

  1. 4.50%

  2. 3.50%

  3. 1.50%

  4. 2.50%

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Correct Option: B

Which solid waste disposal method is endothermal process?

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

  1. Compositing

  2. Pulverization

  3. Incineration

  4. Pyrolysis

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Correct Option: D

The combustion of waste in the absence of Oxygen is called

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

  1. Haemolysis

  2. Pyrolysis

  3. Hydrolysis

  4. None

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Correct Option: B