Noise level in a quiet private business office is about _____________ decibels?
Noise level in a quiet private business office is about _____________ decibels?
		A. 25
B. 50
C. 70
D. 85
		A. 25
B. 50
C. 70
D. 85
		A. 10
B. 90
C. 800
D. 750
		A. Biological oxygen pond
B. Aerated lagoons
C. Trickling filters
D. Gravity separator having oil skimming devices
		A. Skin disorder
B. Bronchitis
C. Bone disease
D. Cancer
		A. Acts as a green house gas thereby raising earth’s temperature
B. Causes asphyxia
C. Causes increase in sea level
D. Enhances the green house effect
		A. Mercury
B. Lead
C. Fluoride
D. Arsenic
		A. Phosgene
B. Methyl isocyanate (MIC)
C. Carbon monoxide
D. Sulphur dioxide