Noise & vibration: why it matters
Noise and vibration cause permanent, life-changing harm that builds up unnoticed. Once your hearing or the nerves and blood vessels in your hands are damaged, they do not recover.
Two sets of regulations apply: the Control of Noise at Work Regulations 2005 and the Control of Vibration at Work Regulations 2005. Both set action values at which the employer must act.
Noise & vibration revision notes
The points below are the core of what the CITB test wants you to know on this topic. Learn these and most questions answer themselves.
Noise action values
At the lower action value of 80 dB(A) the employer must provide hearing protection on request. At the upper action value of 85 dB(A) hearing protection becomes mandatory and zones must be marked.
Hearing damage is permanent
Noise-induced hearing loss and tinnitus cannot be cured. A rough rule: if you must shout to be heard about two metres away, the noise is likely a problem.
Control the noise first
Quieter methods and equipment, barriers and keeping people away from the source come before hearing protection. Protection is the last line, and only works if worn correctly all the time.
Hand-arm vibration (HAVS)
Vibrating tools cause hand-arm vibration syndrome: permanent damage to nerves and blood vessels, with numbness, tingling and vibration white finger.
Vibration exposure limits
The exposure action value is 2.5 m/s2 A(8) and the exposure limit value is 5 m/s2 A(8). Trigger time, the time a tool is actually vibrating, is what counts.
Reduce vibration exposure
Use low-vibration tools, keep them maintained and sharp, limit trigger time, rotate tasks between workers, and keep hands warm to maintain circulation.
Hear a question in Polish
The questions stay in English, exactly like the real CITB test, but you can listen to each one read aloud in native Polish. Press Play in Polish below to try it.
What noise level is generally considered the threshold for causing pain?
70 dB
85 dB
120 dB
140 dB
Every wrong answer can also come with an AI explanation that points to the specific rule behind the correct answer, so you learn from each mistake instead of just memorising. Native Polish audio and AI explanations are two things you will not find on other CSCS practice sites.
Noise & vibration practice questions
Five questions in the real CITB format: one stem, four lettered options, one correct answer. Select Reveal explanation to check your answer and read why it is right.
Q1. What is the main purpose of wearing ear defenders on a construction site?
- A.To enhance hearing in noisy environments.
- B.To block all incoming sound.
- C.To reduce exposure to harmful noise levels.
- D.To communicate better with coworkers.
Reveal explanation
Correct answer: C. To reduce exposure to harmful noise levels.
Ear defenders are used to reduce exposure to noise levels that can be damaging to hearing.
Q2. Which of the following tools is most likely to cause hand-arm vibration syndrome if used incorrectly?
- A.Hammer
- B.Screwdriver
- C.Power drill
- D.Paint brush
Reveal explanation
Correct answer: C. Power drill
Power tools such as drills can cause hand-arm vibration syndrome with prolonged use.
Q3. What is the maximum daily noise exposure limit for workers before hearing protection is mandatory?
- A.70 dB
- B.80 dB
- C.85 dB
- D.90 dB
Reveal explanation
Correct answer: C. 85 dB
The law requires employers to take action to reduce noise exposure when levels reach 85 dB.
Q4. How often should hand-arm vibration exposure be assessed for workers using vibrating tools?
- A.Annually
- B.Monthly
- C.Weekly
- D.Daily
Reveal explanation
Correct answer: D. Daily
Daily assessments ensure that exposure limits are not exceeded.
Q5. Which strategy is NOT effective for reducing noise exposure on a construction site?
- A.Using modern, quieter equipment.
- B.Increasing worker exposure time.
- C.Implementing barriers or screens to block noise.
- D.Providing personal hearing protection.
Reveal explanation
Correct answer: B. Increasing worker exposure time.
Increasing exposure time can increase risk, contrary to reducing it.
Common mistakes
These misconceptions catch people out in the test and on site. Unlearn them before you sit the real exam.
Mistake 1: “Hearing comes back after a noisy day.”
Correct: Temporary dullness can mask permanent damage. Noise-induced hearing loss and tinnitus are permanent and cumulative, so each unprotected exposure adds to the harm for life.
Mistake 2: “Only a sudden loud bang damages hearing.”
Correct: Sustained exposure to everyday site noise, day after day, causes most hearing loss. It is the dose over time, not just one bang, that does the damage.
Mistake 3: “HAVS is just cold hands that will pass.”
Correct: HAVS is permanent damage to nerves and blood vessels from vibrating tools. The early tingling and numbness are warnings, not a passing chill, and the condition does not reverse.
Related CSCS topics
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