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.
| 301. |
The design period in years for pumping plants, is |
| A. | 1 |
| B. | 2 to 3 |
| C. | 3 to 5 |
| D. | 5 to 10 |
| Answer» E. | |
| 302. |
The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is |
| A. | 25 % |
| B. | 50 % |
| C. | 10 % |
| D. | 5 % |
| Answer» C. 10 % | |
| 303. |
The most dangerous pollutant in vehicular emissions is |
| A. | CO₂ |
| B. | SO₂ |
| C. | CO₂ |
| D. | O₂ |
| Answer» B. SO₂ | |
| 304. |
If the pH value of sewage is 7 |
| A. | It is acidic |
| B. | It is alkaline |
| C. | It is neutral |
| D. | None of these |
| Answer» D. None of these | |
| 305. |
In sewers the highest non-scouring velocity is achieved in |
| A. | Glazed bricks sewers |
| B. | Cast iron sewers |
| C. | Cement concrete sewers |
| D. | Stone ware sewers |
| Answer» B. Cast iron sewers | |
| 306. |
In sewage having fully oxidised organic matter, the nitrogen exists in the form of |
| A. | Nitrites |
| B. | Nitrates |
| C. | Free ammonia |
| D. | Aluminoid nitrogen |
| Answer» C. Free ammonia | |
| 307. |
Traps |
| A. | Are water seals which prevent the entry of foul gases |
| B. | Are used to trap the rats entering sewers |
| C. | Dissolve the foul gases |
| D. | Create symphonic action to increase the quick disposal of sewerage |
| Answer» B. Are used to trap the rats entering sewers | |
| 308. |
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is |
| A. | pt = 3H3p/2 Z5 |
| B. | pt = 2H3p/3 Z5 |
| C. | pt = 3H3p/2 Z5 |
| D. | pt = 2H3p/3 Z5 |
| Answer» B. pt = 2H3p/3 Z5 | |
| 309. |
The average temperature of sewage in India, is |
| A. | 10°C |
| B. | 15°C |
| C. | 20°C |
| D. | 25°C |
| Answer» D. 25°C | |
| 310. |
For detecting the nitrites in the sewage, the matching colour may be developed by adding |
| A. | Potassium permanganate |
| B. | Sulphuric acid and napthamine |
| C. | Phenol-di -sulphuric acid potassium hydroxide |
| D. | None of these |
| Answer» C. Phenol-di -sulphuric acid potassium hydroxide | |
| 311. |
For detecting the nitrates in sewage, the colour may be developed by adding |
| A. | Potassium permanganate |
| B. | Sulphuric acid and napthamine |
| C. | Phenol-di -sulphuric acid and potassium hydroxide |
| D. | None of these |
| Answer» D. None of these | |
| 312. |
The algae dies out in the zone of |
| A. | Degradation |
| B. | Active decomposition |
| C. | Recovery |
| D. | Cleaner water |
| Answer» B. Active decomposition | |
| 313. |
Imhoff cone is used to determine |
| A. | Settleable solids |
| B. | Suspended solids |
| C. | Dissolved solids |
| D. | None of these |
| Answer» B. Suspended solids | |
| 314. |
Ventilating shafts are provided to a sewer line at every |
| A. | 100 m |
| B. | 150 m |
| C. | 200 m |
| D. | 300 m |
| Answer» E. | |
| 315. |
Bottom openings 15 cm × 15 cm in the standing baffle wall are provided |
| A. | 15 cm c/c |
| B. | 22.5 cm c/c |
| C. | 30 cm c/c |
| D. | 50 cm c/c |
| Answer» C. 30 cm c/c | |
| 316. |
The sewage is pumped up |
| A. | From low lying areas |
| B. | From flat areas |
| C. | From basements |
| D. | All the above |
| Answer» E. | |
| 317. |
Fresh sewage is generally |
| A. | Alkaline |
| B. | Acidic |
| C. | Highly decomposed |
| D. | A source of objectionable odour |
| Answer» B. Acidic | |
| 318. |
A manhole is generally provided at each |
| A. | Bend |
| B. | Junction |
| C. | Change of gradient |
| D. | All the above |
| Answer» E. | |
| 319. |
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of |
| A. | 15 days |
| B. | 30 days |
| C. | 60 days |
| D. | 90 days |
| Answer» E. | |
| 320. |
If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is |
| A. | 1.39 m |
| B. | 1.49 m |
| C. | 1.59 m |
| D. | 1.69 m |
| Answer» E. | |
| 321. |
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is |
| A. | 50 ppm |
| B. | 100 ppm |
| C. | 150 ppm |
| D. | 200 ppm |
| Answer» E. | |
| 322. |
The sewer which received discharge from two or more main sewers, is known as |
| A. | A trunk sewer |
| B. | An outfall sewer |
| C. | A main sewer |
| D. | An intercepting sewer |
| Answer» B. An outfall sewer | |
| 323. |
The laying of sewers is done with |
| A. | Magnetic compass |
| B. | Theodolite |
| C. | Level |
| D. | Clinometer |
| Answer» D. Clinometer | |
| 324. |
The gradient of sewers depends upon |
| A. | Velocity of flow |
| B. | Diameter of the sewer |
| C. | Discharge |
| D. | All the above |
| Answer» E. | |
| 325. |
The sewerage system consists of |
| A. | House sewer |
| B. | Lateral sewer |
| C. | Branch sewer |
| D. | All of these |
| Answer» E. | |
| 326. |
The grit and silt of the grit chambers, may not be used for |
| A. | Raising low lying areas by dumping |
| B. | Concreting |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» C. Both A and B | |
| 327. |
Fresh sewage may become stale in |
| A. | One hour |
| B. | Two to three hours |
| C. | Three to four hours |
| D. | Six hours |
| Answer» D. Six hours | |
| 328. |
If q is the average sewage flow from a city of population P, the maximum sewage flow |
| A. | Q = [(4 + )/(18 + )] q |
| B. | Q = [(18 + P)/(4 + )] q |
| C. | Q = [(18 + )/(4 + )] q |
| D. | Q = [(5 + )/((15 + )] q |
| Answer» D. Q = [(5 + )/((15 + )] q | |
| 329. |
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be |
| A. | 0.9 cm |
| B. | 1.2 m |
| C. | 1.5 m |
| D. | > 1.5 m |
| Answer» E. | |
| 330. |
Oxidation process results in the formation of |
| A. | Carbon dioxide |
| B. | Nitrates |
| C. | Sulphates |
| D. | All the above |
| Answer» E. | |
| 331. |
Are available in size Stoneware sewers |
| A. | 10 cm |
| B. | 15 cm |
| C. | 20 cm |
| D. | All the above |
| Answer» E. | |
| 332. |
Removal of oil and grease from sewage, is known |
| A. | Screening |
| B. | Skimming |
| C. | Filtration |
| D. | None of these |
| Answer» C. Filtration | |
| 333. |
The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known |
| A. | Bio-Chemical Oxygen Demand (B.O.D.) |
| B. | Dissolved Oxygen (D.O.) |
| C. | Chemical Oxygen Demand (C.O.D.) |
| D. | None of these |
| Answer» C. Chemical Oxygen Demand (C.O.D.) | |
| 334. |
In a trickling filter |
| A. | Filtration process is used |
| B. | Biological action is used |
| C. | Neither A nor B |
| D. | Both A and B |
| Answer» C. Neither A nor B | |
| 335. |
In a grit chamber of a sewage treatment plant, |
| A. | Flow velocity 0.15 m to 0.3 m/sec is kept |
| B. | Depth of 0.9 m to 1.20 m is kept |
| C. | One minute of detention period is kept |
| D. | All the above |
| Answer» E. | |
| 336. |
The minimum diameter of sewer to be adopted is |
| A. | 10 cm |
| B. | 12.5 cm |
| C. | 15 cm |
| D. | 25 cm |
| Answer» D. 25 cm | |
| 337. |
In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is |
| A. | [(100 + P1)/(100 – P2)] V1 |
| B. | [(100 – P1)/(100 + P2)] V1 |
| C. | [(100 – P1)/(100 – P2)] V1 |
| D. | [(100 + P2)/(100 – P1)] V1 |
| Answer» D. [(100 + P2)/(100 – P1)] V1 | |
| 338. |
The pH value of sewage is determined with the help of |
| A. | Imhoff Cone |
| B. | Turbid meter |
| C. | Potentiometer |
| D. | None of these |
| Answer» D. None of these | |
| 339. |
Dry weather flow is: |
| A. | Average daily rate of flow |
| B. | Average monthly rate of flow |
| C. | Average annual rate of flow |
| D. | Water supply allowance per capita |
| Answer» E. | |
| 340. |
The sludge does not contain waste water from |
| A. | Bath rooms |
| B. | Wash basins |
| C. | Kitchen sinks |
| D. | Toilets |
| Answer» E. | |
| 341. |
The porosity of sediments in sewer pipes, is usually taken as |
| A. | 0.010 |
| B. | 0.011 |
| C. | 0.012 |
| D. | 0.013 |
| Answer» E. | |
| 342. |
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called |
| A. | Imhoff tanks |
| B. | Trickling filters |
| C. | Sludge sedimentation tanks |
| D. | None of these |
| Answer» C. Sludge sedimentation tanks | |
| 343. |
For the COD test of sewage, organic matter is oxidised by K 2 Cr 2 0 7 in the presence of |
| A. | H 2 SO 4 |
| B. | HNO 3 |
| C. | HCl |
| D. | none of these. |
| Answer» B. HNO 3 | |
| 344. |
If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is |
| A. | 200 ppm |
| B. | 225 ppm |
| C. | 250 ppm |
| D. | None of these. |
| Answer» D. None of these. | |