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.
| 201. |
The water supply system means |
| A. | the entire scheme of collection and disposal of liquid waste |
| B. | the complete layout from the source of supply to the distribution |
| C. | construction of reservoirs |
| D. | construction of canals |
| Answer» C. construction of reservoirs | |
| 202. |
The pipe through which liquid waste carrying human excreta flows, is called |
| A. | waste pipe |
| B. | soil pipe |
| C. | vent pipe |
| D. | all of these |
| Answer» C. vent pipe | |
| 203. |
In one pipe system of plumbing, waste water is carried away from |
| A. | bath rooms |
| B. | kitchens |
| C. | wash basins |
| D. | all of these |
| Answer» E. | |
| 204. |
The design period for a water supply project is taken as |
| A. | 5 to 10 years |
| B. | 10 to 15 years |
| C. | 15 to 20 years |
| D. | 20 to 30 years |
| Answer» E. | |
| 205. |
A pipe sunk into the ground to tap the underground water is called |
| A. | open well |
| B. | tube well |
| C. | artesian well |
| D. | infiltration well |
| Answer» C. artesian well | |
| 206. |
The pipe installed in the house or building drainage to preserve the water seal of a trap is called anti-siphonage pipe. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 207. |
The valve provided on the suction pipe in a tube well is |
| A. | sluice valve |
| B. | air relief valve |
| C. | pressure relief valve |
| D. | reflux valve |
| Answer» E. | |
| 208. |
A pipe conveying sewage from the plumbing system of a singe building to a common sewer or to the point of immediate disposal is called |
| A. | common sewer |
| B. | house sewer |
| C. | lateral sewer |
| D. | outfall sewer |
| Answer» C. lateral sewer | |
| 209. |
A sewer which receives storm water, surface run-off and sewage is called a |
| A. | common sewer |
| B. | combined sewer |
| C. | branch sewer |
| D. | outfall sewer |
| Answer» C. branch sewer | |
| 210. |
Ventilation of house drainage is required to |
| A. | relieve the pressure of foul gases |
| B. | dilute the fould air in the drain |
| C. | reduce the obnoxious effect of foul air |
| D. | all of these |
| Answer» E. | |
| 211. |
The effluents from the septic tank are discharged into |
| A. | soak pit |
| B. | drainage |
| C. | oxidation pond |
| D. | sewer |
| Answer» B. drainage | |
| 212. |
In primary settling tank, suspended solids are reduced from |
| A. | 10 to 20% |
| B. | 20 to 40% |
| C. | 40 to 70% |
| D. | 70 to 90% |
| Answer» D. 70 to 90% | |
| 213. |
The pipe joint commonly used in pumping stations is |
| A. | flexible joint |
| B. | flanged joint |
| C. | expansion joint |
| D. | spigot and socket joint |
| Answer» C. expansion joint | |
| 214. |
If the size of the sewer is small, then the velocity of flow will be high. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 215. |
The equipment used for checking the levels of the sewer inverts is |
| A. | dumpy level |
| B. | theodolite |
| C. | boning rod |
| D. | all of these |
| Answer» D. all of these | |
| 216. |
For large sewers, the maximum distance between manholes should be |
| A. | 75 m |
| B. | 150 m |
| C. | 200 m |
| D. | 300 m |
| Answer» E. | |
| 217. |
The self cleaning velocity, recommended for Indian conditions, in order to prevent settling down of seqage at the bottom or on the sides of a large sewer is |
| A. | 0.25 m/s |
| B. | 0.50 m/s |
| C. | 0.75 m/s |
| D. | 1.5 m/s |
| Answer» D. 1.5 m/s | |
| 218. |
Manholes are, generally, located |
| A. | at all changes of direction |
| B. | at all changes of gradient |
| C. | at all junctions of main and branch sewers |
| D. | all of these |
| Answer» E. | |
| 219. |
An egg-shaped cross-section of a sewer |
| A. | is economical than circular cross-section |
| B. | is more stable than circular cross-section |
| C. | provides self cleaning velocity in dry weather |
| D. | none of the above |
| Answer» D. none of the above | |
| 220. |
The percentage of chlorine in fresh bleaching powder is |
| A. | 20 to 25% |
| B. | 25 to 30% |
| C. | 30 to 35% |
| D. | 35 to 40% |
| Answer» D. 35 to 40% | |
| 221. |
The maximum permissible hardness in water for drinking purposes should not exceed 100 ppm. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 222. |
The time of contact for chlorination should be at least |
| A. | 5 minutes |
| B. | 20 minutes |
| C. | 1 hour |
| D. | 2 hours |
| Answer» C. 1 hour | |
| 223. |
The maximum permissible chloride content in water for domestic supplies should not exceed |
| A. | 250 ppm |
| B. | 350 ppm |
| C. | 450 ppm |
| D. | 550 ppm |
| Answer» B. 350 ppm | |
| 224. |
The minimum diameter of a manhole cover should be |
| A. | 25 m |
| B. | 50 cm |
| C. | 75 cm |
| D. | 100 cm |
| Answer» C. 75 cm | |
| 225. |
A sewer which gets discharge from two or more main sewers is called |
| A. | main sewer |
| B. | trunk sewer |
| C. | combined sewer |
| D. | intercepting sewer |
| Answer» C. combined sewer | |
| 226. |
A pipe used to carry discharge from sanitary fittings like bathrooms, kitchens etc, is called |
| A. | waste pipe |
| B. | soil pipe |
| C. | vent pipe |
| D. | anti-siphonage pipe |
| Answer» B. soil pipe | |
| 227. |
The horizontal tunnels constructed at shallow depths along the banks of a river to intercept the ground water table are called |
| A. | canals |
| B. | infiltration galleries |
| C. | springs |
| D. | lakes |
| Answer» C. springs | |
| 228. |
A sewer which receives discharge of a number of house sewers is called a |
| A. | common sewer |
| B. | trunk sewer |
| C. | lateral sewer |
| D. | branch sewer |
| Answer» D. branch sewer | |
| 229. |
An arrangement for back washing is provided in |
| A. | slow sand filter |
| B. | sedimentation tank |
| C. | rapid sand filter |
| D. | all of these |
| Answer» D. all of these | |
| 230. |
The process of removing excess chlorine from water is called |
| A. | plain chlorination |
| B. | post-chlorination |
| C. | dechlorination |
| D. | super-chlorination |
| Answer» D. super-chlorination | |
| 231. |
The apparatus used for feeding chlorine into water is called |
| A. | chlorine tank |
| B. | aeration fountain |
| C. | chlorinator |
| D. | none of these |
| Answer» D. none of these | |
| 232. |
When the chlorine is added beyond the break point, the process of treating the water is known as |
| A. | plain chlorination |
| B. | post-chlorination |
| C. | dechlorination |
| D. | super-chlorination |
| Answer» E. | |
| 233. |
Plain chlorination is adopted for treating the water having turbidities less than 20 to 30 ppm. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 234. |
The amount of chlorine used for plain chlorination of water is about |
| A. | 0.2 ppm |
| B. | 0.3 ppm |
| C. | 0.4 ppm |
| D. | 0.5 ppm |
| Answer» E. | |
| 235. |
In pre-chlorination, the raw water is treated with chlorine only. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 236. |
The amount of residual chlorine in treated water is determined by the |
| A. | Orthotolodine test |
| B. | Iodemetric test |
| C. | Amperometric test |
| D. | all of these |
| Answer» E. | |
| 237. |
The underground structure in the form of a circular or rectangular tank for the purposes of admitting sewage into it from the intercepting chamber is called a |
| A. | septic tank |
| B. | cess pool |
| C. | privy pit |
| D. | soak pit |
| Answer» C. privy pit | |
| 238. |
The process of adding certain chemicals to water in order to form flocculent precipitate for absorbing and entraining colloidal mater is called sedimentation with coagulation. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 239. |
In a plain sedimentation tank, under normal conditions, impurities are removed upto |
| A. | 50% |
| B. | 60% |
| C. | 70% |
| D. | 80% |
| Answer» D. 80% | |
| 240. |
Lead should be present in large quantity in water. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 241. |
In the design of a sedimentation tank, the essential factor to be considered is |
| A. | period of detention |
| B. | sludge capacity |
| C. | velocity of flow |
| D. | all of these |
| Answer» E. | |
| 242. |
The treatment of water with only chlorine is known as |
| A. | plain chlorination |
| B. | post cholorination |
| C. | pre-chlorination |
| D. | de-chlorination |
| Answer» B. post cholorination | |
| 243. |
The quantity of arsenic in water for domestic purposes should not be more than 0.05 ppm. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 244. |
The finely divided dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as |
| A. | suspended impurities |
| B. | dissolved impurities |
| C. | colloidal impurities |
| D. | none of these |
| Answer» D. none of these | |
| 245. |
The velocity of flow in any sedimentation tank should not exceed |
| A. | 0.05 mm/s |
| B. | 0.5 mm/s |
| C. | 5 mm/s |
| D. | 50 mm/s |
| Answer» D. 50 mm/s | |
| 246. |
The detention time for an ordinary plain sedimentation tank is |
| A. | 1 to 2 hours |
| B. | 2 to 4 hours |
| C. | 6 to 8 hours |
| D. | 20 to 24 hours |
| Answer» D. 20 to 24 hours | |
| 247. |
Plain sedimentation is a process of retaining water in a basin so that the suspended particles settles down as a result of the |
| A. | action of sun-rays |
| B. | action of gravity and forces |
| C. | action of velocity of the particles |
| D. | none of these |
| Answer» C. action of velocity of the particles | |
| 248. |
The area of the openings in screens should be such that the velocity of flow through them does not exceed |
| A. | 0.75 to 1 m/s |
| B. | 1.5 to 3 m/s |
| C. | 3 to 5 m/s |
| D. | 5 to 6 m/s |
| Answer» B. 1.5 to 3 m/s | |
| 249. |
The rate of filteration |
| A. | increases |
| B. | decreases |
| Answer» C. | |
| 250. |
The water obtained from a lake is known as surface water. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |