CSCS Noise and Vibration 2

Question 1

What does WBV stand for in relation to vibration at work?

Accepted Answer

Whole Body Vibration

Answer

WBV stands for Whole Body Vibration, which is transmitted through the seat or feet of workers operating mobile plant and machinery such as dumpers, excavators, and forklift trucks. Prolonged WBV exposure can cause lower back pain and spinal disorders.

Question 2

What must an employer do when the lower exposure action value for noise (80 dB(A)) is reached or exceeded?

Accepted Answer

Make hearing protection available to workers and provide information and training on noise risks

Answer

At or above the lower exposure action value of 80 dB(A), employers must make hearing protection available to workers who request it, provide information and training about the risks, and carry out a noise risk assessment. Hearing protection is not yet mandatory at this level.

Question 3

What is a hearing protection zone on a construction site?

Accepted Answer

A designated area where noise levels reach or exceed the upper exposure action value of 85 dB(A) and hearing protection must be worn

Answer

Under the Control of Noise at Work Regulations 2005, hearing protection zones must be demarcated and signposted where noise levels reach or exceed the upper exposure action value of 85 dB(A). All persons entering these zones must wear suitable hearing protection.

Question 4

What is audiometry in the context of noise at work?

Accepted Answer

A hearing test to measure a worker's ability to detect sounds at different frequencies

Answer

Audiometry is a hearing test that measures a worker's ability to hear sounds at various frequencies and volumes. It is used as part of health surveillance to detect early signs of noise-induced hearing loss. Baseline audiometry should be conducted before a worker begins noise-exposed work.

Question 5

Which of the following is a practical way to reduce noise exposure on a construction site?

Accepted Answer

Select quieter plant and equipment, use silencers, and limit the duration of exposure through job rotation

Answer

Practical noise reduction measures include selecting quieter tools and equipment, fitting silencers or mufflers, using noise barriers or enclosures, maintaining equipment properly, limiting exposure time through job rotation, and segregating noisy work from other activities.

CSCS Green Card Practice Test

CSCS Green Card Practice Test

CSCS Noise and Vibration 2