Noise and Vibration Flashcards
6 cards from real CSCS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Noise and Vibration flashcards as text
What does the Control of Noise at Work Regulations 2005 require employers to carry out?
Answer: A noise risk assessment to identify workers at risk and determine what actions are needed
The Regulations require employers to carry out a noise risk assessment where workers are likely to be exposed to noise at or above the lower exposure action value. The assessment must identify who is at risk, the level of exposure, and what measures are needed to comply with the Regulations.
Which of the following construction activities is most likely to cause hand-arm vibration exposure?
Answer: Using a pneumatic breaker to demolish concrete
Pneumatic breakers (jackhammers) are among the highest vibration magnitude tools used in construction. Other high-risk tools include hammer drills, angle grinders, chainsaws, and needle guns. Employers must assess the vibration magnitude and limit exposure times accordingly.
What is the purpose of the SNR (Single Number Rating) on hearing protection?
Answer: To show the assumed level of noise reduction in decibels that the hearing protector provides
The SNR is a single figure in decibels that indicates the overall noise reduction provided by a hearing protector under laboratory conditions. In practice, real-world attenuation is typically lower than the SNR, so a real-world factor should be applied when selecting hearing protection.
Under the 2005 Noise Regulations, the exposure limit of 87 dB(A) takes into account what factor that the action values do not?
Answer: The attenuation provided by hearing protection
The exposure limit value of 87 dB(A) is unique among the three threshold values because it takes into account the noise reduction provided by hearing protection. The action values of 80 and 85 dB(A) are measured without considering any hearing protection worn.
What records must employers keep in relation to noise risk assessments?
Answer: A record of the significant findings of the assessment including the measures taken to comply with the Regulations
Employers must keep a record of the significant findings of the noise risk assessment, including the identified risks, the workers exposed, the noise levels, and the measures taken to reduce exposure and comply with the Regulations. These records should be reviewed if circumstances change.
What tool information should employers check before purchasing vibrating equipment for use on site?
Answer: The manufacturer's declared vibration emission value and the tool's suitability for the task
Before purchasing vibrating equipment, employers should check the manufacturer's declared vibration emission value (required under the Supply of Machinery (Safety) Regulations 2008), compare values between similar tools to select the lowest vibration option, and confirm the tool is suitable for the intended task.