Environmental Engineering In Ce - Study Mode

[#186] Which of the following acts as a natural source of air pollution?
Correct Answer

(C) Volcanic eruption

[#187] Which of the following is not a natural source of air pollution?
Correct Answer

(D) None of these

[#188] Which of the following is the most detrimental for water used in high pressure boiler?
Correct Answer

(A) Silica

[#189] A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
Correct Answer

(D) 10000 to 100000

[#190] Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
Correct Answer

(C) Both A & B