Driver's license written test question bank, effective 2026-03-09

43. Which of the following CANNOT be considered a fake petroleum product for use as vehicle fuel?

  1. ①Gasoline mixed with methanol
  2. ②A product that contains less than 5% high-grade gasoline mixed with normal gasoline
  3. ③Diesel oil mixed with kerosene
  4. ④A product with less than 5% water mixed with diesel
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Answer ④

The English PDF has no explanation for this question. The Korean page carries the official explanation. Korean version of this question

Source KoROAD Safe Driving Integrated Civil Service, Driver's License Written Test Question Bank [English] (effective 2026-03-09), post 1923, Download the source PDF source PDF page 12 (checked on 2026-09-04). The question and answer are the KoROAD text as published. The buttons and notes on this page were written by the developer and have not yet been checked by a native speaker. The questions and answers themselves are the official KoROAD text.