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All ExamsCDL General KnowledgeSeeing, Communicating & Managing Space

Seeing, Communicating & Managing Space — CDL General Knowledge Practice Test

Seeing, Communicating & Managing SpaceQuestion 1 of 30

42 questions in this topic · 30 drawn at random this round

How do you find out how many seconds of following distance you have?

CDL Manual — General Knowledge

Questions are based on the official CDL manual (AAMVA model) used by state DMVs. The real CDL knowledge test is given in English — federal rules (FMCSA, 49 CFR 391.11) require English proficiency to drive commercially; our Chinese & Spanish are study aids. Some states also offer the written test in other languages (see the per-state table).

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This CDL General Knowledge Seeing, Communicating & Managing Space practice set has 42 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real CDL General Knowledge knowledge test to pass.

Sample questions

Three questions from the Seeing, Communicating & Managing Space bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.

  1. How many seconds ahead do most good drivers look?

    • 12 to 15 seconds — Correct answer
    • 2 to 3 seconds
    • 5 to 8 seconds
    • 20 to 25 seconds

    Explanation: Most good drivers look at least 12 to 15 seconds ahead — the distance you will travel in that time. Looking far enough ahead (looking ahead 看得足够远 / mirar lo suficientemente lejos) gives you room to stop or change lanes safely.

    Handbook: Seeing, Communicating & Space — Seeing Ahead

  2. At lower speeds, how far is 12 to 15 seconds of looking ahead?

    • About one block — Correct answer
    • About one mile
    • About 100 feet
    • About a quarter of a mile

    Explanation: At lower speeds, 12–15 seconds ahead is about one block. The time-based rule keeps your eyes the same number of seconds ahead whatever your speed (looking ahead 看得足够远 / mirar lo suficientemente lejos).

    Handbook: Seeing, Communicating & Space — Seeing Ahead

  3. At highway speeds, how far ahead is 12 to 15 seconds?

    • About a quarter of a mile — Correct answer
    • About one block
    • About two miles
    • About 50 feet

    Explanation: At highway speeds, 12–15 seconds ahead is about a quarter of a mile. If you are not looking that far ahead you may have to stop too quickly or make quick lane changes (looking ahead 看得足够远 / mirar lo suficientemente lejos).

    Handbook: Seeing, Communicating & Space — Seeing Ahead