MCQOPTIONS
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MCQOPTIONS
This section includes 412 Mcqs, each offering curated multiple-choice questions to sharpen your Surveying knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
If intensity of rainfall in cm per hour is I, percentage coefficient of run-off is P, area of catchment in square kilometres is A, the total run-off Q, is given by |
| A. | Q = 1.758 x 10² x API |
| B. | Q = 2.758 x 10² x API |
| C. | Q = 2.758 x 10³ x API |
| D. | None of these |
| Answer» D. None of these | |
| 252. |
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be |
| A. | nil |
| B. | 5 |
| C. | 10 |
| D. | 15 |
| Answer» B. 5 | |
| 253. |
The permissible amount of nitrites present in potable water, is |
| A. | 10 ppm |
| B. | 15 ppm |
| C. | 20 ppm |
| D. | Nil. |
| Answer» E. | |
| 254. |
Standard process of chlorination of water, is done by |
| A. | plain chlorination |
| B. | pre-chlorination |
| C. | post-chlorination |
| D. | double chlorination. |
| Answer» D. double chlorination. | |
| 255. |
For maximum alkalinity of water, pH value should be |
| A. | zero |
| B. | less than 7 |
| C. | more than 7 |
| D. | 14 |
| Answer» E. | |
| 256. |
Hardness of water is caused due to |
| A. | calcium sulphate |
| B. | magnesium sulphate |
| C. | calcium nitrates |
| D. | all the above. |
| Answer» E. | |
| 257. |
For a city developed haphazardly, the layout of distribution pipes preferred to, is |
| A. | ring system |
| B. | radial system |
| C. | grid iron system |
| D. | dead end system. |
| Answer» E. | |
| 258. |
The type of joint generally used in cast iron pipes, is |
| A. | socket and spigot joint |
| B. | flanged joint |
| C. | dresser coupling joint |
| D. | all the above. |
| Answer» E. | |
| 259. |
The chlorine supply cylinders are generally kept at 38°C to 40°C to prevent |
| A. | conversion into crystals |
| B. | it from burning |
| C. | it from explosion |
| D. | none of these. |
| Answer» B. it from burning | |
| 260. |
The lowest outlet sluice in a dam is provided |
| A. | below the dead storage |
| B. | on the top level of dead storage |
| C. | on the top level of useful storage |
| D. | at the centre of the dam. |
| Answer» C. on the top level of useful storage | |
| 261. |
The rate of silting in a reservoir |
| A. | is less in the beginning |
| B. | remains constant throughout |
| C. | is more in the beginning |
| D. | is more in the beginning and reduces in the end |
| Answer» E. | |
| 262. |
For calculation of economical diameter D of a pipe in metres for a discharge Q to be pumped in cumecs, Lea suggested the empirical formula |
| A. | D = 0.22 √Q |
| B. | D = 1.22 √Q |
| C. | D = 2.22 √Q |
| D. | D = 3.22 √Q |
| Answer» C. D = 2.22 √Q | |
| 263. |
The type of pipe commonly used in water supply distribution schemes, is |
| A. | R.C.C. pipes |
| B. | Hume pipes |
| C. | Cast iron pipes |
| D. | G.I. pipes. |
| Answer» D. G.I. pipes. | |
| 264. |
The population growth curve is |
| A. | S-shaped curve |
| B. | parabolic curve |
| C. | circular curve |
| D. | straight line |
| Answer» B. parabolic curve | |
| 265. |
Quality of water is said to be good if it is |
| A. | free from suspended matter |
| B. | colourless |
| C. | free from pathogenic organism |
| D. | all the above. |
| Answer» E. | |
| 266. |
Demand for public uses in a city, does not include water required for |
| A. | watering of public parks |
| B. | watering of public gardens |
| C. | sprickling on roads |
| D. | drinking purposes. |
| Answer» E. | |
| 267. |
Dead storage of a reservoir of Q capacity generally provided for silt deposition during its life time, is generally kept |
| A. | 1/8th Q |
| B. | 1/6th Q |
| C. | 1/5th Q |
| D. | 1/4th Q |
| Answer» E. | |
| 268. |
Gravity conduits |
| A. | carry water under gravity |
| B. | follow the hydraulic gradient line |
| C. | are carried on trestles in valleys and depressions |
| D. | All the above. |
| Answer» E. | |
| 269. |
If the specific capacity of a well is 0.3183 x 10^-3 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is |
| A. | 8 litres/sec |
| B. | 10 litres/sec |
| C. | 12 litres/sec |
| D. | 16 litres/sec. |
| Answer» E. | |
| 270. |
Critical time for developing a water hammer, is the time required for |
| A. | closing the valve |
| B. | the wave to travel from valve to the reservoir |
| C. | the wave to travel from the valve to the reservoir and back |
| D. | none of these. |
| Answer» D. none of these. | |
| 271. |
Most commonly used section in grade aqueducts, is |
| A. | circular |
| B. | rectangular |
| C. | parabolic |
| D. | horse shoe section. |
| Answer» C. parabolic | |
| 272. |
A high velocity of wash water is required for |
| A. | rapid gravity filter with strainers |
| B. | rapid gravity filter without strainers |
| C. | slow sand filter with strainers |
| D. | slow sand filter without strainers |
| Answer» C. slow sand filter with strainers | |
| 273. |
The ratio of total capacity and dead storage is kept |
| A. | 8 |
| B. | 6 |
| C. | 4 |
| D. | 3 |
| Answer» D. 3 | |
| 274. |
Reciprocating pumps |
| A. | are not suitable for variable heads |
| B. | are four times costlier than centrifugal pumps |
| C. | are not suitable for pumping water containing sediments |
| D. | single stroke produce pulsating flow |
| Answer» B. are four times costlier than centrifugal pumps | |
| 275. |
Steel pipe are |
| A. | suitable for withstanding high internal pressure |
| B. | connected by riveted or welded joints |
| C. | generally laid under ground and no expansion joint is required |
| D. | likely to last 100 years under ordinary conditions |
| Answer» E. | |
| 276. |
The intake opening is generally covered by a screen to prevent entry of debris etc. and its level is kept |
| A. | at the level of water of the source |
| B. | at the bottom of water of the source |
| C. | at about 2.5 m above the bottom |
| D. | none of these. |
| Answer» D. none of these. | |
| 277. |
The external load per unit length of |
| A. | a pipe laid on, or projecting above the undisturbed ground and covered with fills, is proportional to the square of the external diameter of the pipe |
| B. | a flexible pipe burried in narrow trenches and thoroughly compacted side fills, is proportional to the product of the width of the trench and diameter of the pipe |
| C. | a rigid pipe burried in a narrow trenches and thoroughly compacted side fills, is proportional to the square of the width of the trench |
| D. | all the above. |
| Answer» E. | |
| 278. |
In rapid sand filters the ratio of length and diameter of the lateral, should not be greater than |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| Answer» D. 25 | |
| 279. |
Raw water treated with only chlorine, is known as |
| A. | plain chlorination |
| B. | pre-chlorination |
| C. | first-chlorination |
| D. | de-chlorination |
| Answer» B. pre-chlorination | |
| 280. |
Most commonly used pump for lifting water in water supply mains, is |
| A. | axialflow pump |
| B. | reciprocating pump |
| C. | rotary type pump |
| D. | centrifugal pumps |
| Answer» B. reciprocating pump | |
| 281. |
If pH value of water is |
| A. | 7 water it is said to be neutral |
| B. | less than 7 it is said to be acidic |
| C. | more than 7 it is said to be alkaline |
| D. | all the above. |
| Answer» E. | |
| 282. |
Distribution mains of any water supply, is normally designed for its average daily requirement |
| A. | 100% |
| B. | 150% |
| C. | 200% |
| D. | 225%. |
| Answer» E. | |
| 283. |
In pressure supply mains, water hammer pressure is reduced by providing |
| A. | sluice valves |
| B. | air valves |
| C. | pressure relief valves |
| D. | none of the these. |
| Answer» D. none of the these. | |
| 284. |
If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 285. |
The equation given by following equation, in which Q is yearly run off in cm, P is yearly total rainfall in cm, H is difference of R.L.s. of lowest and highest points and A is area of catchment in square metres, is known as |
| A. | English formula |
| B. | Khosla's formula |
| C. | Justin's formula |
| D. | Vermule's formula |
| Answer» D. Vermule's formula | |
| 286. |
The joint used for joining the plain ends of cast iron pipes, is |
| A. | flanged joint |
| B. | socket and spigot joint . |
| C. | dresser coupling joint |
| D. | flexible joint |
| Answer» D. flexible joint | |
| 287. |
The cast iron pipes for water supply system are used for |
| A. | durability |
| B. | strength |
| C. | easy connection |
| D. | all the above. |
| Answer» E. | |
| 288. |
The standard B.O.D. at 20°C, is taken for the consumption in |
| A. | one day |
| B. | 2 days |
| C. | 3 days |
| D. | 5 days. |
| Answer» E. | |
| 289. |
Pick up the correct statement from the following regarding the pressure conduits : |
| A. | Pressure conduits are permitted to run 3/4th full |
| B. | Pressure conduits are always laid along down grades |
| C. | The hydraulic gradient line always coincides the invert of the conduit |
| D. | None of these. |
| Answer» E. | |
| 290. |
According to Buston's formula, fire demand in litres per minute for a population of P thousands, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 291. |
Pressure exerted at 90° bend in a pipe of cross-sectional area A and carrying water with a velocity V under a pressure p, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 292. |
The most commonly used chemical for dechlorination of water, is |
| A. | sodium thiosulphate |
| B. | sodium bisulphate |
| C. | sodium sulphite |
| D. | sulphur-dioxide |
| Answer» D. sulphur-dioxide | |
| 293. |
For estimating the run off of catchments, the mean value of the constant 'K' in the Khosla's formula Qy = Py - K (1.8 Ty + 32) is |
| A. | 1.21 |
| B. | 1.23 |
| C. | 1.25 |
| D. | 1.27 |
| Answer» E. | |
| 294. |
Cast iron pipes are generally preferred to, because |
| A. | of moderate cost |
| B. | of ease to join |
| C. | of durability |
| D. | all the above. |
| Answer» E. | |
| 295. |
Property of earth to allow water to pass through it, is known as |
| A. | perviousness |
| B. | porosity |
| C. | permeability |
| D. | transmissibility. |
| Answer» B. porosity | |
| 296. |
The yield of a rapid gravity filter as compared to that of slow sand filter, is |
| A. | 10 times |
| B. | 15 times |
| C. | 20 times |
| D. | 30 times |
| Answer» E. | |
| 297. |
Water supply system includes |
| A. | digging a well for water |
| B. | construction of dams |
| C. | construction of canals |
| D. | entire arrangement from source to distribution. |
| Answer» E. | |
| 298. |
Corrosion of a pipe |
| A. | reduces its life span |
| B. | reduces its carrying capacity |
| C. | adds colour to water |
| D. | all the above. |
| Answer» E. | |
| 299. |
The level of underground water is called |
| A. | water level |
| B. | water table |
| C. | negative level |
| D. | invert level. |
| Answer» C. negative level | |
| 300. |
An aquiclude is |
| A. | a non artesian aquifer |
| B. | an artesian acquifer |
| C. | a confined bed of impervious material between acquifers |
| D. | a large water body under ground. |
| Answer» D. a large water body under ground. | |