3/12 If the noise level is 55 dbA, then this is acceptable for (3 correct answers): square Permanent jobs in the workshops square Hospital wards square Doctors' offices square Living rooms square Training classes 4/17 Choose an event that will give the greatest effect when exposed to inten vibration (1 correct answer): square Rational regime of work and rest square Isolation of harmful processes square Medical examinations square Therapeutic and preventive nutrition square Ventilation Sources of formation of aerogenic ultrasound include (2 c answers): square Sources of high -frequency noise square High Frequency Vibration Sources square Low frequency thermal generators square Special high frequency generators

3/12<br />Correct answers:<br />- Hospital wards<br />- Doctors' offices<br />- Living rooms<br /><br />Explanation:<br />A noise level of 55 dbA is generally considered acceptable for environments where quietness is important for comfort or health, such as hospital wards, doctors' offices, and living rooms. Workshops and training classes typically require higher noise tolerance.<br /><br />4/17<br />Correct answer:<br />- Isolation of harmful processes<br /><br />Explanation:<br />Isolating harmful processes is the most effective way to reduce the impact of intense vibrations on workers. Other options like rational regimes of work and rest, medical examinations, therapeutic and preventive nutrition, and ventilation do not directly address the issue of intense vibrations.<br /><br />Sources of formation of aerogenic ultrasound include:<br />- High Frequency Vibration Sources<br />- Special high frequency generators<br /><br />Explanation:<br />Aerogenic ultrasound is typically generated by high-frequency vibration sources and special high-frequency generators. Low-frequency thermal generators do not contribute to aerogenic ultrasound.