Daily Safety Technology Quiz (Single-choice Question) (2016.8.15)
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1. When controlling productive dust, for areas where wet methods cannot be used, ( ) should be adopted. A. Enclosure, ventilation, dust removal B. Dry processing methods C. Personal protective measures D. Reforming the manufacturing process 2. Determining the distance to a sound source relies mainly on sound pressure and subjective experience; in free space, for every doubling of distance, the corresponding sound pressure level decreases by ( ) dB. A.1 B.5 C.6 D.10 Answer: A C
1. When controlling productive dust, for areas where wet methods cannot be used, ( ) should be adopted. A. Sealing, ventilation, dust removal. 2. Determining the distance to a sound source relies mainly on sound pressure and subjective experience; in free space, for every doubling of the distance, the corresponding sound pressure level decreases by ( ) dB. C.6
A C~~~~~~~~
1. A. Sealing, ventilation, dust removal 2. C.6
1. When controlling productive dust, for areas where wet methods cannot be used, (A) should be adopted in Color. A. Enclosure, ventilation, dust removal B. Dry processing methods C. Personal protective measures D. Reforming the manufacturing process. 2. Determining the distance to a sound source relies mainly on sound pressure and subjective experience; in free space, for every doubling of distance, the corresponding sound pressure level decreases by (C) dB. A.1 B.5 C.6 D.10