MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the technique used to achieve microbe-free environment? |
| A. | tBacteriostasis |
| B. | tBactericidal |
| C. | tSanitization |
| D. | tAsepsis |
| Answer» E. | |
| 2. |
What is the process of removal of contaminating pathogenic micro-organisms from the articles called? |
| A. | tDecontamination |
| B. | tSanitization |
| C. | tDisinfection |
| D. | tSterilization |
| Answer» B. tSanitization | |
| 3. |
Which type does the following reaction belong to?
|
| A. | tAccelerating rate reaction |
| B. | tDecelerating rate reaction |
| C. | tPseudo first order |
| D. | tFirst order reaction |
| Answer» B. tDecelerating rate reaction | |
| 4. |
Free chlorine is used to destroy bacteria. This reaction is classified as which order reaction? |
| A. | tFirst |
| B. | tPseudo first |
| C. | tSecond |
| D. | tZero |
| Answer» C. tSecond | |
| 5. |
Which of these produce chlorite as the byproduct? |
| A. | tFree chlorine |
| B. | tOzone |
| C. | tChlorine dioxide |
| D. | tCombined chlorine |
| Answer» D. tCombined chlorine | |
| 6. |
What is the most effective dosage of UV to be used as a disinfectant? |
| A. | t20-100 mJ/cm<sup>2</sup> |
| B. | t10-20 mJ/cm<sup>2</sup> |
| C. | t100-120 mJ/cm<sup>2</sup> |
| D. | t130-150 mJ/cm<sup>2</sup> |
| Answer» B. t10-20 mJ/cm<sup>2</sup> | |
| 7. |
What is the most effective dosage of ozone to be used as a disinfectant? |
| A. | t1-5 mg/L |
| B. | t5-10 mg/L |
| C. | t10-12 mg/L |
| D. | t12-14 mg/L |
| Answer» B. t5-10 mg/L | |
| 8. |
What is the most effective dosage of chlorine to be used as a disinfectant? |
| A. | t1-6 mg/L |
| B. | t6-8 mg/L |
| C. | t8-10 mg/L |
| D. | t10-12 mg/L |
| Answer» B. t6-8 mg/L | |
| 9. |
Which of these methods do not form any byproduct? |
| A. | tUV |
| B. | tOzone |
| C. | tChlorine |
| D. | tChlorine dioxide |
| Answer» B. tOzone | |
| 10. |
Which of these is the strongest disinfectant? |
| A. | tOzone |
| B. | tChlorine |
| C. | tChlorine dioxide |
| D. | tUV rays |
| Answer» B. tChlorine | |
| 11. |
Which of these is used as the most common disinfectant? |
| A. | tChlorine |
| B. | tChlorine dioxide |
| C. | tOzone |
| D. | tUV rays |
| Answer» B. tChlorine dioxide | |