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.
| 101. |
The water carriage system is more suitable in rural conditions. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 102. |
Which flow is also called as sanitary sewage? |
| A. | Dry weather flow |
| B. | Storm weather flow |
| C. | Uniform flow |
| D. | Non uniform flow |
| Answer» B. Storm weather flow | |
| 103. |
_________ is the flow through sewers available during non-rainfall period. |
| A. | Gradually varied flow |
| B. | Rapidly varied flow |
| C. | Dry weather flow |
| D. | Storm water flow |
| Answer» D. Storm water flow | |
| 104. |
________ removes oil and grease from the sewage. |
| A. | Catch basin |
| B. | Gullies |
| C. | Grease and oil traps |
| D. | Storm regulators |
| Answer» D. Storm regulators | |
| 105. |
Into how many types, the water carriage system is divided? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 106. |
Which of the following is incorrect regarding partially combined water carriage system? |
| A. | The sewers are of reasonable size |
| B. | There is choking of sewer |
| C. | The storm water increases load on treatment units |
| D. | The storm water increases the cost of pumping |
| Answer» C. The storm water increases load on treatment units | |
| 107. |
The diameter of the circular sewer is 0.2m. The desired depth of flow is __________ |
| A. | 2/3 of the circular section of sewer |
| B. | 1/3 of the circular section of sewer |
| C. | 1/2 of the circular section of sewer |
| D. | 1/4 of the circular section of sewer |
| Answer» D. 1/4 of the circular section of sewer | |
| 108. |
What should be the diameter of the sewer when the self cleansing velocity is 60cm/Sec? |
| A. | 10cm |
| B. | 20cm |
| C. | >60cm |
| D. | 100cm |
| Answer» D. 100cm | |
| 109. |
The minimum diameter of an inverted siphon is __________ |
| A. | 5cm |
| B. | 10cm |
| C. | 15cm |
| D. | 25cm |
| Answer» D. 25cm | |
| 110. |
___________ is the process in which ground water unfiltrate into the sewers. |
| A. | Exfiltration |
| B. | Infiltration |
| C. | Filtration |
| D. | Osmosis |
| Answer» C. Filtration | |
| 111. |
The impermeability factor is also called as ____________ |
| A. | Coefficient of impermeability |
| B. | Runoff coefficient |
| C. | Coefficient of permeability |
| D. | Precipitation factor |
| Answer» C. Coefficient of permeability | |
| 112. |
Which of the following is an advantage of a separate water carriage system? |
| A. | Get choked easily |
| B. | Difficult to clean the sewer |
| C. | Two sets of sewer are used |
| D. | The more uniform character of sewage |
| Answer» E. | |
| 113. |
The sewer should be designed for a minimum of ______ litres of waste water per capita per day. |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 1000 |
| Answer» D. 1000 | |
| 114. |
_______ columns are used for the ventilation of sewer. |
| A. | Aeration columns |
| B. | Inclined columns |
| C. | Ventilating columns |
| D. | Vertical columns |
| Answer» D. Vertical columns | |
| 115. |
Which part of the pump chamber allows to easily disconnect from the pipeline? |
| A. | Gate valve |
| B. | Check valve |
| C. | Union |
| D. | Pump lift chain |
| Answer» D. Pump lift chain | |
| 116. |
The type of backfill is saturated clay. What is its unit weight? |
| A. | 1040kg/m³ |
| B. | 2080kg/m³ |
| C. | 2000kg/m³ |
| D. | 1500kg/m³ |
| Answer» C. 2000kg/m³ | |
| 117. |
Which of the following factor does not effect the dry weather flow? |
| A. | Rate of water supply |
| B. | Temperature conditions |
| C. | Population growth |
| D. | Infiltration of ground water |
| Answer» C. Population growth | |
| 118. |
Which of the following is incorrect regarding Stoneware sewer? |
| A. | They can withstand tensile stress |
| B. | They are highly resistant to sulfide corrosion |
| C. | They have smooth interior |
| D. | They are high compressive strength |
| Answer» B. They are highly resistant to sulfide corrosion | |
| 119. |
Asbestos cement sewer offers resistant to sulfide corrosion. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 120. |
Normally, the amount of water required for flushing operation is _____ litres. |
| A. | 10-20 |
| B. | 5-10 |
| C. | 15-20 |
| D. | 20-30 |
| Answer» C. 15-20 | |
| 121. |
How many types of joints are present in the sewer? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 122. |
Which gas among the following is not produced in the sewer? |
| A. | H₂S |
| B. | HCL |
| C. | CO₂ |
| D. | CH₄ |
| Answer» C. CO₂ | |
| 123. |
Ventilating columns are provided at intervals of ______ along the sewer lines. |
| A. | 30m |
| B. | 50m |
| C. | 100m |
| D. | 150m |
| Answer» E. | |
| 124. |
The value of Bazen’s constant for good earthen channels is ____________ |
| A. | 0.12 |
| B. | 1.54 |
| C. | 0.50 |
| D. | 3.17 |
| Answer» D. 3.17 | |
| 125. |
Which device is used to measure the quantity of water consumed by the consumer? |
| A. | Water meter |
| B. | Stopcock |
| C. | Tube settler |
| D. | Gooseneck |
| Answer» B. Stopcock | |
| 126. |
Asbestos cement sewers are made from __________ |
| A. | Cement, silica |
| B. | Asbestos fibre, copper |
| C. | Asbestos fibre, cement, silica |
| D. | Asbestos fibre, magnesium |
| Answer» D. Asbestos fibre, magnesium | |
| 127. |
The value of Fruhlings factor for suburban locality is ______ |
| A. | 0.10 |
| B. | 0.20 |
| C. | 0.50 |
| D. | 0.80 |
| Answer» D. 0.80 | |
| 128. |
Which of the following is not a component of domestic service connection? |
| A. | Water meter |
| B. | Stopcock |
| C. | Tube settler |
| D. | Gooseneck |
| Answer» D. Gooseneck | |
| 129. |
The length of Goose neck in a domestic service connection is ____________ |
| A. | 10cm |
| B. | 20cm |
| C. | 30cm |
| D. | 40cm |
| Answer» E. | |
| 130. |
The sewage in inverted siphon will flow under __________ |
| A. | Air |
| B. | Vacuum |
| C. | Pressure |
| D. | Gravity |
| Answer» D. Gravity | |
| 131. |
The type of joint used for metallic sewer is __________ |
| A. | Collar joint |
| B. | Flexible joint |
| C. | Mechanical joint |
| D. | Simplex joint |
| Answer» D. Simplex joint | |
| 132. |
The minimum thickness of the side wall of the manhole is __________ |
| A. | 50mm |
| B. | 100mm |
| C. | 225mm |
| D. | 300mm |
| Answer» D. 300mm | |
| 133. |
Which of the following is the expression of the Manning’s formula? |
| A. | V = R⅓ S½/ N |
| B. | V = R⅔ S²/ N |
| C. | V = R⅔ S½/ N |
| D. | V = R⅔ S½ |
| Answer» D. V = R⅔ S½ | |
| 134. |
The grade of concrete used in plain cement concrete sewer is __________ |
| A. | M5 |
| B. | M10 |
| C. | M15 |
| D. | M20 |
| Answer» E. | |
| 135. |
Which of the following order is correct regarding Hazen and William’s coefficient?i. Steel pipeii. Cement lined pipeiii. Wood stave pipeiv. Asbestos cement pipe |
| A. | i > ii > iii > iv |
| B. | i > iii > ii > iv |
| C. | iv > ii > iii > i |
| D. | iv > iii > ii > i |
| Answer» E. | |
| 136. |
The design period of main and branch sewer is ___________ |
| A. | 5years |
| B. | 10years |
| C. | 30years |
| D. | 40years |
| Answer» D. 40years | |
| 137. |
Which of the following is called as a ventilated discharge pipe? |
| A. | Branch sewer pipe |
| B. | Soil vent pipe |
| C. | Outfall sewer pipe |
| D. | Main sewer pipe |
| Answer» C. Outfall sewer pipe | |
| 138. |
Which of the following is called a sewage ejector pump? |
| A. | Solid handling pump |
| B. | Air lift pump |
| C. | Diaphragm pump |
| D. | Reciprocating pump |
| Answer» B. Air lift pump | |
| 139. |
The range of diameter of cast iron sewer is __________ |
| A. | 20-100mm |
| B. | 150-750mm |
| C. | 40-250mm |
| D. | 100-250mm |
| Answer» C. 40-250mm | |
| 140. |
Conservancy system is a highly unhygienic system, causing insanitary conditions. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 141. |
Which of the following surface has a maximum Kuichling’s impermeability factor? |
| A. | Gravel road |
| B. | Water tight roof surface |
| C. | Unpaved surface |
| D. | Macadamized road ways |
| Answer» C. Unpaved surface | |
| 142. |
The height of standard section of Egg shaped sewer is ______ the new shaped section. |
| A. | Equal to |
| B. | Twice of |
| C. | Less than |
| D. | Half of |
| Answer» B. Twice of | |
| 143. |
The Egg shaped sewer provides ____ velocity for low flows over the circular sewer of equal capacity. |
| A. | Lesser |
| B. | Higher |
| C. | Slightly higher |
| D. | Very high |
| Answer» D. Very high | |
| 144. |
________ is the time required by flood discharge to reach the maximum limit. |
| A. | Storm frequency |
| B. | Run-off time |
| C. | Detention period |
| D. | Time of concentration |
| Answer» E. | |
| 145. |
The hydraulic mean depth of a circular section running full is __________ |
| A. | D |
| B. | D/2 |
| C. | D² |
| D. | D/4 |
| Answer» E. | |
| 146. |
The value of the factor K in finding the storm water flow by Rational method is ____________ |
| A. | 100 |
| B. | 160 |
| C. | 1 |
| D. | 1/360 |
| Answer» E. | |
| 147. |
Which of the following is called as depressed sewer? |
| A. | Lateral sewer |
| B. | Outfall sewer |
| C. | Inverted siphon |
| D. | Main sewer |
| Answer» D. Main sewer | |
| 148. |
The non scouring velocity required for cast iron sewer pipes is __________ |
| A. | 50cm/Sec |
| B. | 350cm/Sec |
| C. | 160cm/Sec |
| D. | 220cm/Sec |
| Answer» C. 160cm/Sec | |
| 149. |
Shorter the duration of rainfall ____ will be the rainfall intensity. |
| A. | Lesser |
| B. | Constant |
| C. | Slightly lesser |
| D. | Greater |
| Answer» E. | |
| 150. |
The rate of infiltration lies in the range of ______ m³/hectare/day. |
| A. | 0.20-0.28 |
| B. | 0.42-0.63 |
| C. | 0.60-0.80 |
| D. | 0.70-0.90 |
| Answer» B. 0.42-0.63 | |