Testwala logoTestwala
HomeMocksPracticePYQsDashboard
Testwala logoTestwala

Timing-accurate mock tests and PYQs for SSC, Banking and Railway exams — so the real paper feels like a revision.

Exams

  • SSC exams
  • Banking exams
  • Railway exams
  • All exams

Practice

  • Practice questions
  • Mock test series
  • Sectional tests
  • Year-wise PYQs
  • Performance analytics

Company

  • About us
  • Help Centre
  • Pricing
  • Sign in

Legal

  • Privacy Policy
  • Terms of Service

Contact

  • hello@testwala.co.in
  • Telegram
  • +91 62816 87760

Practice interface modeled on the official exam pattern — not the official examination. Testwala is not affiliated with the Staff Selection Commission, IBPS, SBI, RBI, NABARD, SEBI or Indian Railways.

© 2026 Testwala. All rights reserved.

Built for aspirants, by aspirants.

HomeMocksPracticeStats
  1. Home
  2. ›
  3. PYQs
  4. ›
  5. UPPSC PCS
  6. ›
  7. 2021
  8. ›
  9. Q143

UPPSC PCS 2021 · Question 143 of 150

Flyash pollution is caused by

Environment

  1. AOil refining
  2. BFertilizer industry
  3. CThermal power plantCorrect
  4. DMining

Answer: C. Thermal power plant

Explanation

Fly ash is emitted mainly by coal-based thermal power plants.

Source: https://www.drishtiias.com/images/pdf/UPPSC 2021 Prelims GS Paper -1.pdf

← Q142View full paper (150 questions)Q144 →

Practice the full UPPSC PCS 2021 paper

Timed test with all 150 questions, just like the real exam.

Start test