A. Mufflers (silencers)
B. Acoustic absorbent
C. Lagging of noisy duct
D. None of these
A. 0.5
B. 1
C. 3.5
D. 9.05
Salt content in sea water is about ______________ percent? Read More »
Chemical Environmental Engineering A. Coagulation
B. Sterilisation
C. Disinfection
D. Sedimentation
______________ is the process of killing organism in water ? Read More »
Chemical Environmental Engineering A. Acidic
B. Neutral
C. Alkaline
D. Highly acidic
Fresh sewage is ______________ in nature? Read More »
Chemical Environmental Engineering A. 5
B. 50
C. 500
D. 5000
A. 22
B. 42
C. 332
D. 1050
A. Bag filter
B. Scrubber
C. Electrostatic precipitator
D. Cyclone separator
Which of the following fine dust removal equipments is the most efficient ? Read More »
Chemical Environmental Engineering A. 25
B. 50
C. 70
D. 85
Noise level in a quiet private business office is about _____________ decibels? Read More »
Chemical Environmental Engineering A. SPM
B. Thermal pollution
C. Radioactive rays
D. Noise pollution
Which of the following is not a weightless pollutant ? Read More »
Chemical Environmental Engineering A. Roentgen
B. Decibel
C. Hertz
D. None of these
Noise pollution level in a chemical plant is expressed in __________________? Read More »
Chemical Environmental Engineering