MCQOPTIONS
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MCQOPTIONS
This section includes 295 Mcqs, each offering curated multiple-choice questions to sharpen your Public Health Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
A separate system will be favourable when |
| A. | the sewers are to be laid in rocks |
| B. | the finances are limited |
| C. | the topography is flat necessitating deep excavation for combined sewers |
| D. | all of the above |
| Answer» E. | |
| 52. |
The equipment used for cleaning the sewers easily is called |
| A. | gouge |
| B. | scoop |
| C. | claw |
| D. | scraper |
| Answer» E. | |
| 53. |
Egg-shaped sewers are generally used for |
| A. | separate system |
| B. | combined system |
| C. | partially separate system |
| D. | all of these |
| Answer» E. | |
| 54. |
High turbidity of water can be determined by |
| A. | turbidity tube |
| B. | Jacksons turbidimeter |
| C. | Baylis turbidimeter |
| D. | Hellipe turbidimeter |
| Answer» C. Baylis turbidimeter | |
| 55. |
Rapid sand filter can remove turbidity from water upto an extent of |
| A. | 15 to 25 ppm |
| B. | 25 to 35 ppm |
| C. | 35 to 40 ppm |
| D. | 40 to 50 ppm |
| Answer» D. 40 to 50 ppm | |
| 56. |
The equipment used for removing paper and rags from sewers is called |
| A. | gouge |
| B. | scoop |
| C. | claw |
| D. | scraper |
| Answer» D. scraper | |
| 57. |
The water obtianed from |
| A. | infiltration galleries |
| B. | springs |
| C. | rivers |
| D. | wells |
| Answer» C. rivers | |
| 58. |
Flush type fire hydrants remain standing above the road. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 59. |
Grit chambers of a sewage plant are usually changed after |
| A. | 1 day |
| B. | 1 week |
| C. | 2 weeks |
| D. | 4 weeks |
| Answer» D. 4 weeks | |
| 60. |
According to Indian standards, the consumption of water per capita per day for nursing homes, boarding schools and hostels is |
| A. | 85 litres |
| B. | 100 litres |
| C. | 115 litres |
| D. | 135 litres |
| Answer» E. | |
| 61. |
The quantity of liquid waste which flows in sewers during rainy season is called |
| A. | storm sewage |
| B. | dry weather flow |
| C. | sanitary sewage |
| D. | industrial waste |
| Answer» B. dry weather flow | |
| 62. |
Sphere shaped bacterias are called |
| A. | spirilla |
| B. | bacilli |
| C. | cocci |
| D. | trichobacteria |
| Answer» D. trichobacteria | |
| 63. |
The water supplysystem should be designed for the present population only. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 64. |
The product of H+ ions and OH- ions in a water solution is equal to |
| A. | 0 |
| B. | 10?1 |
| C. | 10?7 |
| D. | 10?14 |
| Answer» E. | |
| 65. |
Which of the following formula is used for computing the quantity of water for fire demand? |
| A. | Freeman's formula |
| B. | Kuichling formula |
| C. | Buston's formula |
| D. | all of these |
| Answer» E. | |
| 66. |
Run-off is the water which flows |
| A. | in infiltration galleries |
| B. | in sewer pipes |
| C. | due to leakage of pipes |
| D. | in rivers |
| Answer» E. | |
| 67. |
The seqage is treated by aerobic bacteria action in |
| A. | settling tank |
| B. | crickling filter |
| C. | oxidation pond |
| D. | all of these |
| Answer» D. all of these | |
| 68. |
A sluice valve, in water distribution system, is used to |
| A. | protect the pipe against negative pressure |
| B. | regulate the flow of water through the pipe |
| C. | prevent water to flow back in the opposite direction |
| D. | all of tha above |
| Answer» C. prevent water to flow back in the opposite direction | |
| 69. |
The activated sludge |
| A. | contains fertilising constituents |
| B. | indicates the degree of aeration |
| C. | indicates high water content |
| D. | all of these |
| Answer» E. | |
| 70. |
By base exchange method, water of zero degree hardness can be obtained. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 71. |
The alkalinity in water is caused by |
| A. | sodium carbonate |
| B. | potassium carbonate |
| C. | calcium hydroxide |
| D. | all of these |
| Answer» E. | |
| 72. |
The human excreta is a |
| A. | dry |
| B. | semi-liquid |
| C. | liquid |
| Answer» C. liquid | |
| 73. |
The bacteria which require oxygen for their survival is known as |
| A. | anaerobic bacteria |
| B. | pathogenic bacteria |
| C. | aerobic bacteria |
| D. | non-pathogenic bacteria |
| Answer» D. non-pathogenic bacteria | |
| 74. |
Dissolved impurities consist of |
| A. | bacteria |
| B. | iron |
| C. | slit |
| D. | fungi |
| Answer» C. slit | |
| 75. |
The formula, F = R - K (1.8 T + 32), for obtaining the annual run-off is known as |
| A. | Justin's formula |
| B. | Vermule's formula |
| C. | Inglis formula |
| D. | Khosla's formula |
| Answer» E. | |
| 76. |
For a city or town with roads of rectangular pattern, the type of layout used for the distribution of pipes is |
| A. | dead end system |
| B. | ring system |
| C. | radial system |
| D. | grid iron system |
| Answer» E. | |
| 77. |
The type of joint to be used in pipes depends upon the |
| A. | material of pipe |
| B. | internal pressure |
| C. | conditions of support |
| D. | all of these |
| Answer» E. | |
| 78. |
Odours and tastes may result due to the prsence of |
| A. | micro-organisms either dead or alive |
| B. | dissolved gases such as oxygen, carbon dioxide, methane etc. |
| C. | mineral substances such as sodium chloride, iron compounds etc. |
| D. | all of the above |
| Answer» E. | |
| 79. |
When in the pervious strata, the surface of water surrounding the well is at atmospheric pressure, the well is known as |
| A. | gravity well |
| B. | artesian well |
| C. | open well |
| D. | deep well |
| Answer» B. artesian well | |
| 80. |
The turbidity in water is caused due to |
| A. | silt |
| B. | clay |
| C. | finely divided organic matter |
| D. | all of these |
| Answer» E. | |
| 81. |
The increase in population of a young and rapidly developing city is estimated by comparative method. |
| A. | True |
| B. | False |
| Answer» C. | |
| 82. |
Land disposal of sewage will be favourable where |
| A. | the rivers run dry or have a small flow during summer |
| B. | rainfall is very high |
| C. | climate is wet and rates of evaporation is low |
| D. | all of the above |
| Answer» B. rainfall is very high | |
| 83. |
The natural outflow of sub-surface water at the surface is termed as spring. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 84. |
Alkalinity is caused by positively charged hydrogen ions. |
| A. | Right |
| B. | Wrong |
| Answer» C. | |
| 85. |
When turbidity of water exceeds about 45 ppm, coagulation |
| A. | should be |
| B. | should not be |
| Answer» B. should not be | |
| 86. |
When lead is present in water, it |
| A. | changes its colour |
| B. | causes turbidity |
| C. | causes alkalinity |
| D. | none of these |
| Answer» E. | |
| 87. |
The lime soda process of water softening |
| A. | requires less quantity of coagulant |
| B. | helps in kolling pathogenic bacterias |
| C. | is suitable for turbid and acidic water |
| D. | all of these |
| Answer» E. | |
| 88. |
The yield of the well is measured in |
| A. | cum / h |
| B. | litres / h |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» D. none of these | |
| 89. |
Turbidity is the measure of resistance to the passage of |
| A. | light |
| B. | air |
| Answer» B. air | |
| 90. |
The odour of water does not change with the temperature. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 91. |
In the freshly produced sewage, aerobic activity is maximum. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 92. |
A reflux valve, in water distribution system, is used to |
| A. | protect the pipe against negative pressure |
| B. | regulate the flow of water through the pipe |
| C. | prevent water to flow back in the opposite direction |
| D. | all of the above |
| Answer» D. all of the above | |
| 93. |
Sodium carbonate causes |
| A. | hardness |
| B. | softness |
| Answer» C. | |
| 94. |
The layers such as lime stone and snd store which do not allow the water to pass through them are known as |
| A. | aquifers |
| B. | aquiclude |
| C. | aquifuge |
| D. | none of these |
| Answer» C. aquifuge | |
| 95. |
The yield of the well dpends upon the |
| A. | permeability of the soil |
| B. | position of water table |
| C. | depth of well in impervious layer |
| D. | all of these |
| Answer» E. | |
| 96. |
For an area developed in haphazard way, the type of layout used for the distribution of pipes is known as |
| A. | dead end system |
| B. | ring system |
| C. | radial system |
| D. | grid iron system |
| Answer» B. ring system | |
| 97. |
For the sewers of diameter less than 600 mm, the type of joint preferred is |
| A. | spigot and socket joint |
| B. | collar joint |
| C. | bandage joint |
| D. | mechanical joint |
| Answer» B. collar joint | |
| 98. |
The ground water is generally free from |
| A. | suspended |
| B. | dissolved |
| Answer» B. dissolved | |
| 99. |
In secondary treatment of sewage, the operation which takes place is |
| A. | removal of heavier suspended inorganic material |
| B. | removal of fine dissolved organic material |
| C. | removal of harmful bacterias |
| D. | all of the above |
| Answer» C. removal of harmful bacterias | |
| 100. |
For the sewers of diameter more than 600 mm, the type of joint preferred is |
| A. | spigot and socket joint |
| B. | collar joint |
| C. | bandage joint |
| D. | mechanical joint |
| Answer» C. bandage joint | |