MCQOPTIONS
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MCQOPTIONS
This section includes 112 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The shape factor for circular rods in finding the head loss through the screen is _____ |
| A. | 1.79 |
| B. | 2.42 |
| C. | 1.83 |
| D. | 1.45 |
| Answer» B. 2.42 | |
| 102. |
What is the detention time of a water softening accelerator? |
| A. | 1-6minutes |
| B. | 20minutes |
| C. | 30 minutes |
| D. | 1-2hours |
| Answer» E. | |
| 103. |
______ are used in fine screen so that they do not get clogged up. |
| A. | Automatic strainers |
| B. | Spray aerators |
| C. | Cascade aerators |
| D. | Gravel bed aerators |
| Answer» B. Spray aerators | |
| 104. |
Which of the following causes the temporary hardness? |
| A. | CaSO₄ |
| B. | MgSO₄ |
| C. | MgCl₂ |
| D. | Ca(HCO₃)₂ |
| Answer» E. | |
| 105. |
Which filter is normally used in the lime soda treatment plant? |
| A. | Slow sand filter |
| B. | Rapid sand filter |
| C. | Dual media filter |
| D. | Mixed media filter |
| Answer» C. Dual media filter | |
| 106. |
For removal of iron from water ________ mg of oxygen is required. |
| A. | 0.14 |
| B. | 0.50 |
| C. | 1 |
| D. | 1.5 |
| Answer» B. 0.50 | |
| 107. |
In which form of solute stabilization, hydrogen sulfide in water is oxidized into sulfate? |
| A. | Chlorination |
| B. | Liming |
| C. | Re-carbonation |
| D. | Super-chlorination |
| Answer» B. Liming | |
| 108. |
Flocculation of iron from water by the addition of lime is an example of which of the following process? |
| A. | Chemical precipitation |
| B. | Chemical coagulation |
| C. | Ion exchange |
| D. | Adsorption |
| Answer» B. Chemical coagulation | |
| 109. |
How many types of aerators are commonly used in the treatment of water? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 110. |
In which unit operation, gases are released or absorbed in the water? |
| A. | Gas transfer |
| B. | Ion transfer |
| C. | Solute stabilization |
| D. | Solids Transfer |
| Answer» B. Ion transfer | |
| 111. |
In which unit operation objectionable solutes are converted into unobjectionable forms without removal? |
| A. | Gas transfer |
| B. | Ion transfer |
| C. | Solute stabilization |
| D. | Solids Transfer |
| Answer» D. Solids Transfer | |
| 112. |
Which of the following process is used to remove the colloidal particles from water? |
| A. | Chemical precipitation |
| B. | Chemical coagulation |
| C. | Ion exchange |
| D. | Adsorption |
| Answer» C. Ion exchange | |