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

49. Which of the following is NOT correct regarding the characteristics of the fuel used in an LPG vehicle?

  1. ①It burns in a gaseous state, allowing the engine to operate smoothly.
  2. ②LPG for motor vehicles has a distinct odor.
  3. ③It is generally lighter than air and less explosive.
  4. ④It has a lower energy density compared to gasoline or diesel, resulting in lower output and lower fuel efficiency for vehicles equipped with an engine of the same capacity.
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Answer ③

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 14 (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.