MCQOPTIONS
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MCQOPTIONS
This section includes 183 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In which of the following, the self cleansing velocity is maximum? |
| A. | Angular stones |
| B. | Fine sand |
| C. | Fine clay |
| D. | Fine gravel |
| Answer» B. Fine sand | |
| 52. |
Which of the following is situated above the working chamber in a deep manhole? |
| A. | Main sewer |
| B. | Access shaft |
| C. | Branch sewer |
| D. | Channel |
| Answer» C. Branch sewer | |
| 53. |
The manhole in which inclined pipe for transfer of sewage from branch to main sewer is __________ |
| A. | Deep manhole |
| B. | Ramp |
| C. | Drop manhole |
| D. | Normal manhole |
| Answer» C. Drop manhole | |
| 54. |
_______ is the velocity at which the solid matter in sewage remained in suspended form. |
| A. | Settling velocity |
| B. | Self cleansing velocity |
| C. | Mean velocity |
| D. | Non Scouring velocity |
| Answer» C. Mean velocity | |
| 55. |
Which of the following pump is used for the removal of grit? |
| A. | Centrifugal pump |
| B. | Pneumatic ejector |
| C. | Rotary screw pump |
| D. | Air lift pump |
| Answer» D. Air lift pump | |
| 56. |
_________ flow persists for various time duration. |
| A. | Minimum sewage |
| B. | Maximum sewage |
| C. | Sustained |
| D. | Average sewage |
| Answer» D. Average sewage | |
| 57. |
The wet weather flow is also known by ______ |
| A. | Minimum sewage flow |
| B. | Maximum sewage flow |
| C. | Storm water flow |
| D. | Average rate of flow |
| Answer» D. Average rate of flow | |
| 58. |
The peaking factor is directly proportional to the population of the city. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 59. |
Which of the following is most effective in preventing the overloading of treatment plants? |
| A. | Street inlets |
| B. | Overflow weir |
| C. | Siphon valley |
| D. | Leap weir |
| Answer» C. Siphon valley | |
| 60. |
The ratio of cement mortar used in Bell and spigot joint is? |
| A. | 1:1 |
| B. | 1:6 |
| C. | 2:1 |
| D. | 1:3 |
| Answer» B. 1:6 | |
| 61. |
The radius of invert of the standard section of Egg shaped sewer is ____ of the new shaped section. |
| A. | Twice |
| B. | Thrice |
| C. | Half |
| D. | Equivalent |
| Answer» B. Thrice | |
| 62. |
The population of the city is 30,000. What is the peaking factor? |
| A. | 1 |
| B. | 2 |
| C. | 2.25 |
| D. | 2.5 |
| Answer» E. | |
| 63. |
Consider the following statement.The storm water flow depends oni. Catchment areaii. Ground slopeiii. Quality of watervi. Rainfall durationWhich of the following is correct? |
| A. | i, ii |
| B. | i, ii, iii |
| C. | i, ii, iv |
| D. | i, iv |
| Answer» D. i, iv | |
| 64. |
The crown corrosion takes place due to formation of __________ |
| A. | CO₂ |
| B. | H₂O |
| C. | H₂S |
| D. | HCl |
| Answer» D. HCl | |
| 65. |
The runoff in cumec by the Rational method is defined by ______________ |
| A. | Q = K*A*I*R |
| B. | Q = (K+A+I) *R |
| C. | Q = (K+A) *R |
| D. | Q = A*I*R |
| Answer» B. Q = (K+A+I) *R | |
| 66. |
The manhole in which vertical pipe is used for the transfer of sewage from branch to main sewer is __________ |
| A. | Deep manhole |
| B. | Ramp |
| C. | Drop manhole |
| D. | Normal manhole |
| Answer» D. Normal manhole | |
| 67. |
A circular sewer having 0.4m diameter is flowing with velocity 2m/Sec. If the gradient of sewer is 1 in 90. Find the value of Chezy’s coefficient? |
| A. | 10 |
| B. | 30 |
| C. | 60 |
| D. | 40 |
| Answer» E. | |
| 68. |
The expression of the Chezy’s formula is given by ____________ |
| A. | V = C/RS |
| B. | V = CRS² |
| C. | V = C (RS)½ |
| D. | V = C/ (RS)½ |
| Answer» D. V = C/ (RS)½ | |
| 69. |
Which sewer is also called as submain sewer? |
| A. | Branch sewer |
| B. | Separate sewer |
| C. | Main sewer |
| D. | Lateral sewer |
| Answer» B. Separate sewer | |
| 70. |
Which sewer collects sewage directly from the house? |
| A. | Main sewer |
| B. | Outfall sewer |
| C. | Lateral sewer |
| D. | Intercepting sewer |
| Answer» D. Intercepting sewer | |
| 71. |
The maximum runoff occurs when the duration of storm equals the time of concentration. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 72. |
The diameter of the sewer is _____ the diameter of ventilating column. |
| A. | Equal to |
| B. | 2 times |
| C. | 3 times |
| D. | 4 times |
| Answer» D. 4 times | |
| 73. |
A circular section of sewer gives _______ area for a given perimeter. |
| A. | Small |
| B. | Large |
| C. | Minimum |
| D. | Maximum |
| Answer» E. | |
| 74. |
The ratio of cement mortar used in the Collar joint is? |
| A. | 1:2 |
| B. | 1:6 |
| C. | 2:1 |
| D. | 1:1 |
| Answer» B. 1:6 | |
| 75. |
Which of the following ovoid cross section has the maximum nominal size range? |
| A. | Squashed |
| B. | Extended |
| C. | Normal |
| D. | Wide |
| Answer» B. Extended | |
| 76. |
Which device is used to measure the velocity of flow for high flows? |
| A. | Water meter |
| B. | Inferential meter |
| C. | Globe valve |
| D. | Gate valve |
| Answer» C. Globe valve | |
| 77. |
The quantity of waste water is assumed to be ___________ % of the quantity of water supply. |
| A. | 40 |
| B. | 50 |
| C. | 60 |
| D. | 80 |
| Answer» E. | |
| 78. |
The choice of combined water carriage system does not depend on ____________ |
| A. | Space consideration |
| B. | Even rainfall pattern |
| C. | Steep topography |
| D. | Pumping requirements |
| Answer» D. Pumping requirements | |
| 79. |
Which of the following is an advantage of the combined water carriage system? |
| A. | There is more air in large sewer |
| B. | There is the inclusion of storm water |
| C. | There is difficulties in ventilation of large sewer |
| D. | Overflowing of sewer |
| Answer» B. There is the inclusion of storm water | |
| 80. |
After how many years, night soil gives good quality manure? |
| A. | 1 |
| B. | 5 |
| C. | 10 |
| D. | 14 |
| Answer» B. 5 | |
| 81. |
Which of the following pipe material has a maximum modulus of elasticity? |
| A. | Concrete |
| B. | Mild steel |
| C. | Cast iron |
| D. | PVC |
| Answer» C. Cast iron | |
| 82. |
Which system of collection of sewage is a dry system? |
| A. | Conservancy system |
| B. | Biological digestion |
| C. | Incernation |
| D. | Water carriage system |
| Answer» B. Biological digestion | |
| 83. |
Which device is used to measure velocity for low flows? |
| A. | Water meter |
| B. | Inferential meter |
| C. | Globe valve |
| D. | Displacement meter |
| Answer» E. | |
| 84. |
Infiltration of water does not depend on ___________ |
| A. | Size of sewer |
| B. | Sewer material |
| C. | Quality of water |
| D. | Type of soil |
| Answer» D. Type of soil | |
| 85. |
Which of the following is not correct regarding conservancy system? |
| A. | High maintenance cost |
| B. | Highly unhygienic system |
| C. | Independent of labour |
| D. | Chances of epidemic |
| Answer» D. Chances of epidemic | |
| 86. |
________ is a method where water is used as a medium for the flow of sewage from its production of the treatment unit. |
| A. | Conservancy system |
| B. | Biological digestion |
| C. | Incernation |
| D. | Water carriage system |
| Answer» E. | |
| 87. |
Which of the following is correct regarding combined water carriage system? |
| A. | The sewers are of small size |
| B. | The strength of sewer is reduced by dilution |
| C. | Low cost of construction |
| D. | More chances of choking are there |
| Answer» C. Low cost of construction | |
| 88. |
Which of the following is a disadvantage of a separate water carriage system? |
| A. | Low installation charge |
| B. | No loads on treatment units |
| C. | Lesser air contact with small sized sewer |
| D. | Provision of the automatic flushing tank is not required |
| Answer» D. Provision of the automatic flushing tank is not required | |
| 89. |
_______ provides only one sewer to carry both foul sewage and rainwater. |
| A. | Separate water carriage system |
| B. | Combined water carriage system |
| C. | Partially combined water carriage system |
| D. | Conservancy system |
| Answer» C. Partially combined water carriage system | |
| 90. |
The number of separate systems in a sewer area are? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» B. 3 | |
| 91. |
The water carriage system is a hygienic system without any bad smell. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 92. |
Which of the following is an example of Inferential meter? |
| A. | Turbine meter |
| B. | Hydrometer |
| C. | Water meter |
| D. | Gate valve |
| Answer» B. Hydrometer | |
| 93. |
One side walkway is a type of __________ |
| A. | Circular cross section |
| B. | Channel cross section |
| C. | Ovoid cross section |
| D. | Arch cross section |
| Answer» C. Ovoid cross section | |
| 94. |
Which sewer appurtenance allows lamp in the sewer? |
| A. | Catch basin |
| B. | Drop manhole |
| C. | Lamp hole |
| D. | Storm regulators |
| Answer» D. Storm regulators | |
| 95. |
If the type of surface is of the most densely populated portion of the city, what is the value of Kuichling’s impermeability factor? |
| A. | 0.14 |
| B. | 0.30 |
| C. | 0.80 |
| D. | 0.45 |
| Answer» D. 0.45 | |
| 96. |
Which sewer appurtenance discharges the excess sewage flow to relief sewer? |
| A. | Flushing tank |
| B. | Drop manhole |
| C. | Lamp hole |
| D. | Storm regulators |
| Answer» E. | |
| 97. |
Identify the correct statement from the following regarding Cast iron sewer. |
| A. | They have low internal pressure |
| B. | They are not leakage proof |
| C. | They cannot withstand heavy external loads |
| D. | They are preferred in water supply lines |
| Answer» E. | |
| 98. |
The proportional depth of a circular sewer running partially half is __________ |
| A. | (1-cosK/2) |
| B. | (1/2) * (1-sinK/2) |
| C. | (1/2) * (1-cosK/2) |
| D. | (1-cosK/2)² |
| Answer» D. (1-cosK/2)² | |
| 99. |
Which of the following locality has a minimum Fruhlings factor? |
| A. | Business area |
| B. | An area closely built up |
| C. | Area with 50% attached and detached houses |
| D. | Extremely suburban area |
| Answer» E. | |
| 100. |
Into how many types manholes are classified on the basis of depth of manhole? |
| A. | 3 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» B. 5 | |