MCQOPTIONS
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MCQOPTIONS
This section includes 344 Mcqs, each offering curated multiple-choice questions to sharpen your Surveying knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
The settlement of a particle in sedimentation tank, is affected by |
| A. | Velocity of flow |
| B. | Viscosity of water |
| C. | Size and shape of solid |
| D. | All the above |
| Answer» E. | |
| 202. |
A well oxidized sewage contains nitrogen mainly as |
| A. | Nitrates |
| B. | Nitrites |
| C. | Free ammonia |
| D. | None of these |
| Answer» B. Nitrites | |
| 203. |
Disposal to sewage in large cities, is done in |
| A. | Irrigation |
| B. | Dilution |
| C. | Oxidation |
| D. | Purification |
| Answer» C. Oxidation | |
| 204. |
In SI units the power of sound is represented in |
| A. | Kgs |
| B. | Joules |
| C. | Newtons |
| D. | Watts |
| Answer» E. | |
| 205. |
The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is |
| A. | 1.095 |
| B. | 1.085 |
| C. | 1.075 |
| D. | 1.065 |
| Answer» B. 1.085 | |
| 206. |
The gas evolved in sewers is |
| A. | Carbondioxide |
| B. | Hydrogen sulphide |
| C. | Methane |
| D. | All of these |
| Answer» E. | |
| 207. |
Which one of the following resists hydrogen sulphide corrosion? |
| A. | R.C.C. |
| B. | Glazed stone wares |
| C. | Asbestos cement |
| D. | Glazed ware |
| Answer» E. | |
| 208. |
The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by |
| A. | Bazin |
| B. | Crimp and Bruges |
| C. | William-Hazen |
| D. | Kutter |
| Answer» C. William-Hazen | |
| 209. |
The underground sewers are more subjected to |
| A. | Tensile force |
| B. | Compressive force |
| C. | Bending force |
| D. | Shearing force |
| Answer» C. Bending force | |
| 210. |
The digested sludge from septic tanks, is removed after a maximum period of |
| A. | 3 years |
| B. | 3.5 years |
| C. | 4 years |
| D. | 5 years |
| Answer» B. 3.5 years | |
| 211. |
The sewerage system originates from |
| A. | House sewers |
| B. | Lateral sewers |
| C. | Branch sewers |
| D. | Main sewers |
| Answer» B. Lateral sewers | |
| 212. |
For sewers, inverted siphon is provided for |
| A. | One pipe |
| B. | Two pipes |
| C. | Three pipes |
| D. | Four pipes |
| Answer» D. Four pipes | |
| 213. |
The intensity of rain is expressed in |
| A. | cm/minute |
| B. | cm/hour |
| C. | cm/day |
| D. | None of these |
| Answer» C. cm/day | |
| 214. |
Kjeldahl nitrogen is a mixture of |
| A. | Ammonia and nitrogen |
| B. | Nitrogen and organic nitrogen |
| C. | Organic nitrogen and ammonia |
| D. | All the above |
| Answer» E. | |
| 215. |
In detritus tanks, |
| A. | Flow velocity is kept 0.09 m/sec |
| B. | Detention period is kept 3 to 4 minutes |
| C. | Organic and inorganic materials are separated |
| D. | All the above |
| Answer» E. | |
| 216. |
¾th or ¼th extra space is left in sewer pipes at maximum discharge for |
| A. | Low estimates of the average and maximum flows |
| B. | Large scale infiltration of storm water |
| C. | Unexpected increase in population |
| D. | All the above |
| Answer» E. | |
| 217. |
Pathogens (or pathogenic bacterias) in water may cause |
| A. | Typhoid |
| B. | Cholera |
| C. | Dysentery |
| D. | All the above |
| Answer» E. | |
| 218. |
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of |
| A. | Hydrochloric acid |
| B. | Sulphuric acid |
| C. | Nitric acid |
| D. | Citric acid |
| Answer» C. Nitric acid | |
| 219. |
For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of |
| A. | H₂SO₄ |
| B. | HNO₃ |
| C. | HCl |
| D. | None of these |
| Answer» B. HNO₃ | |
| 220. |
In sewage, the solids in mg per litre is |
| A. | 100 to 500 |
| B. | 500 to 1000 |
| C. | 1000 to 1500 |
| D. | 1500 to 2000 |
| Answer» C. 1000 to 1500 | |
| 221. |
For large sewers, maximum distance between manholes may be |
| A. | 50 m |
| B. | 100 m |
| C. | 200 m |
| D. | 300 m |
| Answer» E. | |
| 222. |
For house drainage minimum gradient is |
| A. | 1 in 60 |
| B. | 1 in 80 |
| C. | 1 in 10 |
| D. | 1 in 400 |
| Answer» B. 1 in 80 | |
| 223. |
The coagulant which is generally not used for treating the sewage, is |
| A. | Alum |
| B. | Ferric chloride |
| C. | Ferric sulphate |
| D. | Chlorinated coppers |
| Answer» B. Ferric chloride | |
| 224. |
Sewer ventilating columns are generally placed at |
| A. | Distances 150 m to 300 m |
| B. | Upper ends of branch sewers |
| C. | Every change in the size of sewers |
| D. | All the above |
| Answer» E. | |
| 225. |
In sewers the gas generally found, is |
| A. | Hydrogen sulphide (H2S) |
| B. | Carbon dioxide (CO2) |
| C. | Methane (CH4) |
| D. | All the above |
| Answer» E. | |
| 226. |
An inverted siphon is designed generally for |
| A. | One pipe |
| B. | Two pipes |
| C. | Three pipes |
| D. | Four pipes |
| Answer» D. Four pipes | |
| 227. |
Stone ware pipes are |
| A. | Highly resistant to sulphide corrosion |
| B. | Highly impervious |
| C. | Hydraulically efficient because of their smooth interior surface |
| D. | Especially suited to pressure pipes |
| Answer» E. | |
| 228. |
Flocculated particles do not change their |
| A. | Size |
| B. | Shape |
| C. | Weight |
| D. | None of these |
| Answer» E. | |
| 229. |
The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called |
| A. | A heap |
| B. | Plateau |
| C. | Windrow |
| D. | None of these |
| Answer» E. | |
| 230. |
In very first stage of decomposition of the organic matter in sewage |
| A. | Nitrites are formed |
| B. | Nitrates are formed |
| C. | Carbondioxide is formed |
| D. | Ammonia is formed |
| Answer» E. | |
| 231. |
Clogging of sewers, is caused due to |
| A. | Silting |
| B. | Low discharge |
| C. | Greasy and oily matters |
| D. | All the above |
| Answer» E. | |
| 232. |
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» E. | |
| 233. |
Self-cleansing velocity is |
| A. | Velocity at dry weather flow |
| B. | Velocity of water at flushing |
| C. | Velocity at which no accumulation remains in the drains |
| D. | Velocity of water in a pressure filter |
| Answer» D. Velocity of water in a pressure filter | |
| 234. |
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is |
| A. | 1 in 60 |
| B. | 1 in 100 |
| C. | 1 in 120 |
| D. | None of these |
| Answer» B. 1 in 100 | |
| 235. |
The liquid wastes from kitchens, bath rooms and wash basins, is not called |
| A. | Liquid waste |
| B. | Sullage |
| C. | Sewage |
| D. | None of these |
| Answer» D. None of these | |
| 236. |
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient, |
| A. | Is only provided |
| B. | Is doubled |
| C. | Is trebled |
| D. | Is not enough |
| Answer» C. Is trebled | |
| 237. |
In 1000 kg of sewage, the total solids approximate |
| A. | 0.5 to 1.0 kg |
| B. | 1 kg to 2.0 kg |
| C. | 5 kg to 7.5 kg |
| D. | 7.5 kg to 10 kg |
| Answer» B. 1 kg to 2.0 kg | |
| 238. |
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is |
| A. | 100 cm |
| B. | 90 cm |
| C. | 80 cm |
| D. | 50 cm |
| Answer» B. 90 cm | |
| 239. |
For design purposes, the normal rate of infiltration of ground water into the sewer, is |
| A. | 500 litres/km/cm |
| B. | 1000 litres/km/cm |
| C. | 1500 litres/km/cm |
| D. | 2000 litres/km/cm |
| Answer» E. | |
| 240. |
Chlorination of water is done for the removal of |
| A. | Bacterias |
| B. | Suspended solids |
| C. | Sediments |
| D. | Hardness |
| Answer» B. Suspended solids | |
| 241. |
The maximum depth of sedimentation tanks, is kept |
| A. | 3 m |
| B. | 3.5 m |
| C. | 4 m |
| D. | 4.5 m |
| Answer» B. 3.5 m | |
| 242. |
The ratio of design discharge to the surface area of a sedimentation tank is called |
| A. | Surface loading |
| B. | Overflow rate |
| C. | Overflow velocity |
| D. | All of these |
| Answer» E. | |
| 243. |
A sewer running partially full and hurried with back filled, fails in compression due to |
| A. | Weight of the pipe |
| B. | Weight of the back fill |
| C. | Superimposed traffic loads |
| D. | All the above |
| Answer» E. | |
| 244. |
Dry water flow in a combined sewer, is |
| A. | Industrial sewage |
| B. | Domestic sewage |
| C. | Storm water |
| D. | Inclusive of domestic and industrial sewage but excludes storm water |
| Answer» E. | |
| 245. |
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is |
| A. | 0.05552 cumec |
| B. | 0.05554 cumec |
| C. | 0.05556 cumec |
| D. | 0.0556 cumec |
| Answer» D. 0.0556 cumec | |
| 246. |
For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by |
| A. | Kinchling |
| B. | Lloyd Davis |
| C. | Frubling |
| D. | All the above |
| Answer» E. | |
| 247. |
In sewers the effect of scouring is more on |
| A. | Top side |
| B. | Bottom side |
| C. | Horizontal side |
| D. | All sides |
| Answer» C. Horizontal side | |
| 248. |
Depletion of ozone layer in the outer atmosphere may cause |
| A. | Lung cancer |
| B. | Skin cancer |
| C. | Bronchitis |
| D. | Heart disorder |
| Answer» C. Bronchitis | |
| 249. |
The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock’s law, is |
| A. | Vs = 418 (Gs – Gw) d [(3T + 70)/100] |
| B. | Vs = 418 (Gs – Gw)d² [(3T + 70)/100] |
| C. | Vs = 218 (Gs – Gw)d² [(3T + 70)/100] |
| D. | Vs = 218 (Gs – Gw)d [(3T + 70)/100] |
| Answer» C. Vs = 218 (Gs – Gw)d² [(3T + 70)/100] | |
| 250. |
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at |
| A. | Full depth |
| B. | Half full |
| C. | Two third full |
| D. | Three fourth full |
| Answer» C. Two third full | |