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Waste Water Engineering
Waste Water Engineering Exam
Quiz 1
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Q.1
Which of these is used as the most common disinfectant?
a) Chlorine
b) Chlorine dioxide
c) Ozone
d) UV rays
Q.2
Which of these is the strongest disinfectant?
a) Ozone
b) Chlorine
c) Chlorine dioxide
d) UV rays
Q.3
Which of these methods do not form any byproduct?
a) UV
b) Ozone
c) Chlorine
d) Chlorine dioxide
Q.4
What is the most effective dosage of chlorine to be used as a disinfectant?
a) 1-6 mg/L
b) 6-8 mg/L
c) 8-10 mg/L
d) 10-12 mg/L
Q.5
What is the most effective dosage of ozone to be used as a disinfectant?
a) 1-5 mg/L
b) 5-10 mg/L
c) 10-12 mg/L
d) 12-14 mg/L
Q.6
What is the most effective dosage of UV to be used as a disinfectant?
a) 20-100 mJ/cm2
b) 10-20 mJ/cm2
c) 100-120 mJ/cm2
d) 130-150 mJ/cm2
Q.7
Which of these produce chlorite as the byproduct?
a) Free chlorine
b) Ozone
c) Chlorine dioxide
d) Combined chlorine
Q.8
Free chlorine is used to destroy bacteria. This reaction is classified as which order reaction?
a) First
b) Pseudo first
c) Second
d) Zero
Q.9
Which type does the following reaction belong to?
a) Accelerating rate reaction
b) Decelerating rate reaction
c) Pseudo first order
d) First order reaction
Q.10
Which type does the following reaction belong to?
a) Accelerating rate
b) Decelerating rate
c) Pseudo first order
d) First order reaction
Q.11
What is the EE/O for TCA in kWh/US gal/order?
a) 15
b) 20
c) 10
d) 30
Q.12
What is the process of removal of contaminating pathogenic micro-organisms from the articles called?
a) Decontamination
b) Sanitization
c) Disinfection
d) Sterilization
Q.13
What is the technique used to achieve microbe-free environment?
a) Bacteriostasis
b) Bactericidal
c) Sanitization
d) Asepsis
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