Kelias 95LEARNING SPACE
FREIGHT TRANSPORT

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Professional qualificationLithuania / EU · C / CE
QUESTION 68 / 300
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How does caffeine affect alertness and fatigue?

General principlesCompared with sources

Answer

Caffeine can briefly increase alertness, but it does not replace sleep. Too much can cause insomnia, anxiety or palpitations; its effects depend on the individual and the dose.

A simple explanation

Caffeine can temporarily increase alertness, but it does not replace sleep or make up for sleep deprivation. Too much can cause palpitations, anxiety and sleep disturbances; its effects depend on the amount and individual sensitivity.

REMEMBER

Coffee can mask drowsiness, but it cannot replace sleep.

Sources and checks

Editorial review: 2026-09-28.

Learning objective: Recognise the limitations of caffeine and its possible unwanted effects. EU syllabus area: 3.4. FDA identifies individual sensitivity, insomnia, anxiety and palpitations; NHTSA explains the limitations of coffee when sleep-deprived.

Answer compared with sources: 2026-09-28.

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For an instructor and a small group: choose one C/CE freight transport topic in the Lithuania and EU context. Use your own devices, including a phone and a computer.

  1. 3 questions. In ‘Recall’ mode, first answer in your own words, then read the explanation and mark what needs more review.
  2. A lesson and a diagram. Discuss what they explain and which conditions matter.
  3. One scenario. Decide before revealing the solution. Explain the reasons for your chosen action.
  4. A few quiz questions. Read the explanation for each option. You can finish the quiz early; the remaining questions will be marked as unanswered.
  5. Discussion. Everyone names one useful point and one thing that needs correcting.

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ID 36 · How does caffeine affect alertness and fatigue?

Translated from the Lithuanian edition. The material concerns Lithuania and the EU; source-check dates refer to the Lithuanian answers.

Study materials for C/CE drivers: 300 questions with explanations, lessons, quizzes and practical scenarios. Based on Lithuania's and EU rules.

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