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  9. Q58

PPSC PCS 2020 · Question 58 of 95

A Three-way catalytic converter is used in vehicles to reduce 1. Unburnt Hydrocarbon 2. Carbon Monoxide 3. Nitric Oxide 4. Sulphur dioxide Select the correct answer using the code given below:

Science & Tech

  1. AOnly 1,2, and 3Correct
  2. BOnly 1,3 and 4
  3. COnly 2,3 and 4
  4. DOnly 3 and 4

Answer: A. Only 1,2, and 3

Explanation

A three-way catalytic converter cuts unburnt hydrocarbons, carbon monoxide and nitrogen oxides from vehicle exhaust.

Source: https://cdn.mindspritesolutions.com/examrace/SPSC/Punjab-PSC/Punjab-PSC-Past-Papers/Punjab-Civil-Service-2020-Official-Paper-1-Part-1.pdf

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