Environmental Engineering

311. Energy flow in ecosystem is

  1. Unidirectional
  2. Bidirectional
  3. Multidirectional
  4. None of the above

Correct answer: (A)
Unidirectional

312. Ex situ conservation includes

  1. Zoo
  2. Botanic garden
  3. Germplasm bank
  4. all of the above

Correct answer: (D)
all of the above

313. Example of primary pollutant

  1. SO2
  2. NO2
  3. CO
  4. hydrocarbons

Correct answer: (D)
hydrocarbons

314. Exponential growth occurs when there is

  1. a great environmental resistance
  2. no environmental resistance
  3. no biotic potential
  4. a fixed carrying capacity

Correct answer: (B)
no environmental resistance

315. Fine organic or inorganic particles suspended in air is called

  1. particulate pollutant
  2. gaseous pollutant
  3. aerosol
  4. none of these

Correct answer: (C)
aerosol

316. Growing agricultural crops between rows of planted trees is known as

  1. Social forestry
  2. Jhum
  3. Taungya system
  4. Agroforestry

Correct answer: (C)
Taungya system

317. Habitat loss and fragmentation, over exploitation, alien species invasion and co extinction are causes for

  1. Population exploitation
  2. Pollution
  3. Migration
  4. Ecological succession
  5. Biodiversity loss

Correct answer: (E)
Biodiversity loss

318. Harmful trace metals in fly ash:

  1. antimony
  2. cadmium
  3. arsenic
  4. all of the above

Correct answer: (D)
all of the above

319. Heavy dust can cause

  1. leaf blights
  2. opening of stomata
  3. closure of stomata
  4. browning of leaves

Correct answer: (C)
closure of stomata

320. High biological oxygen demand indicates:

  1. absence of microbial pollution
  2. moderate microbial pollution
  3. intense level of microbial pollution
  4. all of these

Correct answer: (C)
intense level of microbial pollution

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