MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 71 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent. |
| A. | 84 |
| B. | 88 |
| C. | 80 |
| D. | 92 |
| Answer» B. 88 | |
| 2. |
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km. |
| A. | 0.05 |
| B. | 1 |
| C. | 6.5 |
| D. | 15 |
| Answer» D. 15 | |
| 3. |
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre. |
| A. | 2 |
| B. | 42 |
| C. | 332 |
| D. | 1050 |
| Answer» C. 332 | |
| 4. |
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called |
| A. | fumes |
| B. | mists |
| C. | smoke |
| D. | aerosols |
| Answer» E. | |
| 5. |
Failures within hydrosphere in oxygen cycle can result in the development of: |
| A. | Hyperoxic zones |
| B. | Hypoxic zones |
| C. | Hydrolic zones |
| D. | Hydroxic zones |
| Answer» C. Hydrolic zones | |
| 6. |
What are the main constituents of the environmental cycles? |
| A. | Water cycle and food cycle |
| B. | Water cycle and nutrient cycle |
| C. | Nutrient cycle |
| D. | Water cycle and air cycle |
| Answer» C. Nutrient cycle | |
| 7. |
_________ is a raw material sent to and processed in a waste recycling plant. |
| A. | Recyclant |
| B. | Nodules |
| C. | Particulars |
| D. | Recyclate |
| Answer» E. | |
| 8. |
Pollution cases can be classified into _________ types. |
| A. | 4 |
| B. | 2 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 9. |
_________ is the simplest equipment used for collection of solid particulates. |
| A. | Inertial separators |
| B. | Filters |
| C. | Settling chamber |
| D. | Cyclones |
| Answer» D. Cyclones | |
| 10. |
Which of the below leads to disturbance of nitrogen fixation in the soil? |
| A. | Urban waste |
| B. | Fertilizers |
| C. | Pesticides |
| D. | Industrial effluents |
| Answer» C. Pesticides | |
| 11. |
When some chemical is mixed with water, _________ is formed. |
| A. | Solution |
| B. | Floc |
| C. | Bubbles |
| D. | Foam |
| Answer» C. Bubbles | |
| 12. |
Hydrogen Peroxide is generated from: |
| A. | Photochemical smog products |
| B. | Explosive manufacturing industry |
| C. | Automobile exhausts |
| D. | Thermal power plants |
| Answer» B. Explosive manufacturing industry | |
| 13. |
In the method of trenching, the size of the trench may be: |
| A. | 12 x 5 x 2m |
| B. | 15 x 5 x 3m |
| C. | 12 x 3 x 2m |
| D. | 15 x 5 x 5m |
| Answer» D. 15 x 5 x 5m | |
| 14. |
Refuse may be of _________ types. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 15. |
To test turbidity of polluted water in the field, _________ is used. |
| A. | Baylis Turbidimeter |
| B. | Jackson Turbidimeter |
| C. | Turbidity tube |
| D. | Turbidity rod |
| Answer» E. | |
| 16. |
The presence of gas in water is indicated by: |
| A. | Fizzing sound |
| B. | Foam |
| C. | Bubbles |
| D. | Colour change |
| Answer» C. Bubbles | |
| 17. |
The living environment, the biosphere consists of __________ components. |
| A. | 2 |
| B. | 4 |
| C. | 1 |
| D. | 3 |
| Answer» E. | |
| 18. |
State whether the following statement is True or False. |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Solids are removed from the water by which of the following unit operation? |
| A. | Inter facial contact |
| B. | Solid stabilization |
| C. | Ion transfer |
| D. | Solids transfer |
| Answer» E. | |
| 20. |
By which process, odour producing substances is oxidized? |
| A. | Chlorination |
| B. | Liming |
| C. | Re-carbonation |
| D. | Super-chlorination |
| Answer» E. | |
| 21. |
In which process, excess lime is converted into bicarbonate? |
| A. | Chlorination |
| B. | Liming |
| C. | Re-carbonation |
| D. | Super-chlorination |
| Answer» D. Super-chlorination | |
| 22. |
Which form of solute stabilization occurs when water passes through limestone? |
| A. | Chlorination |
| B. | Liming |
| C. | Re-carbonation |
| D. | Super-chlorination |
| Answer» C. Re-carbonation | |
| 23. |
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 | |
| 24. |
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 | |
| 25. |
Flocculation of iron from water by addition of lime is an example of which of the following process? |
| A. | Flocculation of iron from water by addition of lime is an example of which of the following process? |
| B. | Chemical coagulation |
| C. | Ion exchange |
| D. | Adsorption |
| Answer» B. Chemical coagulation | |
| 26. |
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 | |
| 27. |
How many types of aerators are commonly used in the treatment of water? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 28. |
In which unit operation, gases are released or absorbed in water? |
| A. | Gas transfer |
| B. | Ion transfer |
| C. | Solute stabilization |
| D. | Solids Transfer |
| Answer» B. Ion transfer | |
| 29. |
State whether the following statement is True or False. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 30. |
Which bacteria results in the corrosion of iron and steel pipes embedded in soil? |
| A. | Escherichia coli bacteria |
| B. | Bacterium coli bacteria |
| C. | Iron bacteria |
| D. | Sulphur bacteria |
| Answer» E. | |
| 31. |
Which bacteria cause the reddish brown deposits in the tank? |
| A. | Escherichia coli bacteria |
| B. | Bacterium coli bacteria |
| C. | Iron bacteria |
| D. | Sulphur bacteria |
| Answer» D. Sulphur bacteria | |
| 32. |
If the acid and gas are formed in the multiple tube fermentation technique, the test is _____ |
| A. | Positive |
| B. | Continued |
| C. | Negative |
| D. | Discarded |
| Answer» B. Continued | |
| 33. |
The number of bacterial colonies by Agar plate count test should not exceed ____ per ml for potable water. |
| A. | 1 |
| B. | 10 |
| C. | 100 |
| D. | 1000 |
| Answer» D. 1000 | |
| 34. |
Which of the following is the disease caused by bacterial infections? |
| A. | Amoebic dysentery |
| B. | Infectious hepatitis |
| C. | Typhoid fever |
| D. | Poliomyelitis |
| Answer» D. Poliomyelitis | |
| 35. |
What is the temperature at which MPN test is performed? |
| A. | 35oC |
| B. | 37 oC |
| C. | 40oC |
| D. | 45 oC |
| Answer» C. 40oC | |
| 36. |
Which of the following is a better test to identify Coliforms? |
| A. | Coliform index |
| B. | Multiple tube fermentation |
| C. | MPN test |
| D. | Membrane filter technique |
| Answer» E. | |
| 37. |
_______ represents the bacterial density that is most likely to be present in water. |
| A. | BOD |
| B. | COD |
| C. | MPN |
| D. | Coliform index |
| Answer» D. Coliform index | |
| 38. |
Which type of bacteria has a rod shaped structure? |
| A. | Bacilli |
| B. | Cocci |
| C. | Spirilla |
| D. | Vibrio |
| Answer» B. Cocci | |
| 39. |
When depth of insertion of turbidity rod increases, the reading in the turbidity rod ___ |
| A. | Decreases |
| B. | Increases |
| C. | First decrease, then increase |
| D. | Remains constant |
| Answer» B. Increases | |
| 40. |
What is the full form of NTU in context with turbidity? |
| A. | Number of transfer unit |
| B. | Neurological turbidity unit |
| C. | Nephelometric turbidity unit |
| D. | Network terminal unit |
| Answer» D. Network terminal unit | |
| 41. |
The permissible limit of turbidity of domestic water is ____ ppm. |
| A. | 5-10 |
| B. | 1-5 |
| C. | 10-50 |
| D. | 10-30 |
| Answer» B. 1-5 | |
| 42. |
Which of the following statement is wrong regarding turbidity? |
| A. | It is an extent to which light is absorbed by particles in the water |
| B. | It is expressed in ppm |
| C. | It depends on the fineness of particle present in the water |
| D. | Turbidity rod is a laboratory method to measure turbidity |
| Answer» E. | |
| 43. |
If the PO value is 6, what does it imply? |
| A. | No perceptible odour |
| B. | Very faint odour |
| C. | Very distinct odour |
| D. | Extremely strong odour |
| Answer» E. | |
| 44. |
One JTU is equivalent to turbidity produced by |
| A. | 1mg of fine silica dissolved in 1L of distilled water |
| B. | 1g of fine silica dissolved in 1L of distilled water |
| C. | 1g of fine silica dissolved in 1ml of distilled water |
| D. | 1mg of fine silica dissolved in 1ml of distilled water |
| Answer» B. 1g of fine silica dissolved in 1L of distilled water | |
| 45. |
State whether the following statement is True or False. |
| A. | True |
| B. | False |
| Answer» C. | |
| 46. |
The range for threshold odour number is |
| A. | 0-3 |
| B. | 1-5 |
| C. | 1-3 |
| D. | 0-5 |
| Answer» D. 0-5 | |
| 47. |
Which method is used to measure the color of water? |
| A. | Gravimetric analysis |
| B. | Chromatography |
| C. | Tintometer method |
| D. | Hydrometer analysis |
| Answer» D. Hydrometer analysis | |
| 48. |
Identify the correct relation between the following? |
| A. | Dissolved solid = Total solid + Suspended solid |
| B. | Dissolved solid = Total solid – Suspended solid |
| C. | Total solid = Dissolved solid / Suspended solid |
| D. | Dissolved solid = Suspended solid – Total solid |
| Answer» C. Total solid = Dissolved solid / Suspended solid | |
| 49. |
The maximum permissible limit for suspended solids is ___ |
| A. | 10 mg/l |
| B. | 20 mg/l |
| C. | 30 mg/l |
| D. | 40 mg/l |
| Answer» D. 40 mg/l | |
| 50. |
Suspended solids are measured by which of the following? |
| A. | Turbidity rod |
| B. | Gravimetric test |
| C. | Chromatography |
| D. | Jackson’s turbidity meter |
| Answer» C. Chromatography | |