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.
| 301. |
At the socket and spigot joint, |
| A. | enlarged end of the pipe is called socket |
| B. | normal end of the pipe is called spigot |
| C. | spigot is fitted into the socket |
| D. | all the above. |
| Answer» E. | |
| 302. |
Increase in population of a rapidly growing city, may be estimated by |
| A. | arithmetical mean method |
| B. | geometrical method |
| C. | incremental increase method |
| D. | graphical comparison method. |
| Answer» C. incremental increase method | |
| 303. |
Detention period of a settling tank is |
| A. | average theoretical time required for water to flow through the tank |
| B. | time required for flow of water to fill the tank fully |
| C. | average time for which water is retained in tank |
| D. | all the above. |
| Answer» E. | |
| 304. |
An ideal sand for filters should be |
| A. | free from dirt and other impurities |
| B. | uniform in nature and size |
| C. | hard and resistant |
| D. | all the above. |
| Answer» E. | |
| 305. |
Open channels supported over tres-les, are generally known as |
| A. | raised canals |
| B. | acqueducts |
| C. | syphons |
| D. | flumes. |
| Answer» E. | |
| 306. |
Slow sand filter is used if maximum turbidity of raw water is less than |
| A. | 10 gm/litre |
| B. | 20 gm/litre |
| C. | 30 gm/litre |
| D. | 50 gm/litre. |
| Answer» E. | |
| 307. |
Economic height of a dam is the height corresponding to which |
| A. | cost of the dam per unit of storage is minimum |
| B. | amount of silting is less |
| C. | cost of dam per unit storage is maximum |
| D. | free board provided is least |
| Answer» B. amount of silting is less | |
| 308. |
The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form |
| A. | Mono-chloramine (NHCl) |
| B. | Di-chloramine (NH₂Cl) |
| C. | Nitrogen trichloramine (NCl₃) |
| D. | All the above. |
| Answer» E. | |
| 309. |
From the surface of reservoir, evaporation may be minimised by sprinkling |
| A. | Spirit |
| B. | Hydrochloric acid |
| C. | Cetyl alcohol |
| D. | Methane |
| Answer» D. Methane | |
| 310. |
High pH value of water does not produce |
| A. | incrustation |
| B. | sediment deposits |
| C. | turberculation |
| D. | both (c) and (d). |
| Answer» E. | |
| 311. |
At break point of chlorination, |
| A. | chlorine is used to oxidise |
| B. | residual chloride is zero |
| C. | residual chloride is maximum |
| D. | residual chlorine reappears. |
| Answer» E. | |
| 312. |
m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in cm, runoff can be calculated by |
| A. | velocity area method |
| B. | weir or spillway method |
| C. | use of venturi-meter |
| D. | using power plant consumption |
| Answer» B. weir or spillway method | |
| 313. |
The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3 hours and 50 minutes. The yield of the well per minute is |
| A. | 0.0033 |
| B. | 0.0044 |
| C. | 0.0055 |
| D. | 0.0066 |
| Answer» D. 0.0066 | |
| 314. |
The difference in the reservoir level and the lowest point of the water mains is 180 m. The expected pressure due to water hammer is 7.5 kg/cm² in a pressure conduit of diameter 1 m. Assuming the efficiency of the riveted joints of the pipe as 0.6 and minimum cover 3 mm for corrosion, the thickness of the pipe materials, is |
| A. | 10 mm |
| B. | 15 mm |
| C. | 20 mm |
| D. | 25 mm |
| Answer» D. 25 mm | |
| 315. |
To detect the turbidity of the order of 0 to 1000 P.P.M. the instrument used is |
| A. | turbidimeter |
| B. | Jackson turbidimeter |
| C. | Baylis turbidimeter |
| D. | Hallige turbidimeter. |
| Answer» D. Hallige turbidimeter. | |
| 316. |
Perched acquifers are generally found |
| A. | on the surface of the ground |
| B. | below the surface of the ground but above water table |
| C. | below the water table |
| D. | all the above. |
| Answer» C. below the water table | |
| 317. |
If P is population of a city in thousands and Q is fire demand in litres per minute, for proper estimate of water, the Empirical formula Q = 1135(P/5 + 10) is suggested by |
| A. | National Board of fire under-writers |
| B. | Freeman |
| C. | Kuichling |
| D. | None of these. |
| Answer» C. Kuichling | |
| 318. |
A pressure conduit laid under ground, may not be subjected to |
| A. | internal pressure of water |
| B. | pressure due to external load |
| C. | longitudinal temperature stress |
| D. | longitudinal stresses due to unbalanced pressure to bends |
| Answer» D. longitudinal stresses due to unbalanced pressure to bends | |
| 319. |
The depth of the water table at a place is 45 m below the general ground level. To lift water from a deep tube well in such a locality, the type of pump to be installed is |
| A. | Centrifugal pump |
| B. | Reciprocating pump |
| C. | Deep well turbine pump |
| D. | None of these. |
| Answer» D. None of these. | |
| 320. |
Service connections to consumers houses, are generally provided with |
| A. | copper pipes |
| B. | hume pipes |
| C. | galvanised iron pipes |
| D. | P.V.C. pipes |
| Answer» D. P.V.C. pipes | |
| 321. |
Capacity of soil to absorb moisture, is generally known as |
| A. | permeability |
| B. | porosity |
| C. | infiltration capacity |
| D. | perviousness. |
| Answer» D. perviousness. | |
| 322. |
Mostly used coagulant, is |
| A. | chlorine |
| B. | alum |
| C. | lime |
| D. | bleaching powder. |
| Answer» C. lime | |
| 323. |
The maximum pressure to which cast iron pipes may be subjected to, is |
| A. | 3 kg/cm² |
| B. | 5 kg/cm² |
| C. | 7 kg/cm² |
| D. | 10 kg/cm². |
| Answer» D. 10 kg/cm². | |
| 324. |
Hard water for public water supply is discarded because |
| A. | it consumes more soap |
| B. | it contains lot of turbidity |
| C. | it contains pathogenic bacterias |
| D. | it possesses bad taste and odour |
| Answer» B. it contains lot of turbidity | |
| 325. |
Non-pathogenic bacterias cause the following water borne disease, |
| A. | cholera |
| B. | typhoid |
| C. | infections hepatitis |
| D. | none of these. |
| Answer» E. | |
| 326. |
While designing a water supply of an industrial township, industrial and commercial water demand of total supply, is assumed |
| A. | 10% |
| B. | 10 to 15% |
| C. | 15 to 20% |
| D. | 20 to 25%. |
| Answer» E. | |
| 327. |
Carbonates in water produce |
| A. | temporary hardness |
| B. | permanent hardness |
| C. | acidity |
| D. | alkanity. |
| Answer» B. permanent hardness | |
| 328. |
Water is distributed to consumers by gravitational system, in |
| A. | Dehradun |
| B. | Bombay |
| C. | Delhi |
| D. | Both (a) and (b). |
| Answer» E. | |
| 329. |
By boiling water, hardness can be removed if it is due to |
| A. | calcium sulphate |
| B. | magnesium sulphate |
| C. | calcium nitrate |
| D. | calcium bicarbonate |
| Answer» E. | |
| 330. |
For determining the velocity of flow of underground water, the most commonly used non-empirical formula is |
| A. | Darcy's formula |
| B. | Slichter's formula |
| C. | Hazen's formula |
| D. | Lacy's formula. |
| Answer» B. Slichter's formula | |
| 331. |
If L, B and D length, breadth and depth of water in a rectangular sedimentation tank of total discharge Q, the settling velocity, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 332. |
The least thickness of class B cast iron (spun) pipe, is |
| A. | 7.2 mm |
| B. | 7.9 mm |
| C. | 8.6 mm |
| D. | 10 mm. |
| Answer» D. 10 mm. | |
| 333. |
Q is the discharge from an unconfined tube well with depression head S through a pipe of radius rw. If the radius of influence is R, the minimum required length of the strainer, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 334. |
The following formula for the head loss in conduits is generally known as |
| A. | Hazen-William's formula |
| B. | Manning's formula |
| C. | Darcy-Weisbach formula |
| D. | Nikuradse formula |
| Answer» C. Darcy-Weisbach formula | |
| 335. |
If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is |
| A. | 1880 kilo litres |
| B. | 2880 kilo litres |
| C. | 3880 kilo litres |
| D. | 4880 kilo litres. |
| Answer» C. 3880 kilo litres | |
| 336. |
Water to the consumers may be supplied from |
| A. | infiltration galleries connected to sump well |
| B. | infiltration well dug out on the banks of rivers |
| C. | ranney wells sunk to the water level |
| D. | all the above. |
| Answer» E. | |
| 337. |
Efficiency of removing bacterias from raw water by a slow sand filter, is |
| A. | 80% to 81% |
| B. | 85% to 86% |
| C. | 90% to 97% |
| D. | 98% to 99%. |
| Answer» E. | |
| 338. |
The chloride content of treated water for public supplies should not exceed |
| A. | 100 ppm |
| B. | 150 ppm |
| C. | 200 ppm |
| D. | 250 ppm |
| Answer» E. | |
| 339. |
Derivation of Thiem's formula given by following equation, is based on the assumption |
| A. | the aquifer is homogeneous, isotropic and of infinite depth and area |
| B. | the well is sunk through the full depth of the aquifer |
| C. | the flow lines are radial and horizontal, and the flow is laminar |
| D. | all the above |
| Answer» E. | |
| 340. |
The head against which the motor works for lifting water, is |
| A. | maximum depth of water table below ground level |
| B. | maximum depression head |
| C. | velocity head |
| D. | all the above. |
| Answer» E. | |
| 341. |
The fire demand for a city of 50, 000 population, according to Godrich formula, is |
| A. | 40 mld |
| B. | 42 mld |
| C. | 44 mld |
| D. | 48 mld. |
| Answer» D. 48 mld. | |
| 342. |
A centrifugal pump is required to be primed before starting if it is located |
| A. | at higher level than water level of reservoir |
| B. | at lower level than water level of reservoir |
| C. | both (a) and (b) |
| D. | neither (a) nor (b). |
| Answer» B. at lower level than water level of reservoir | |
| 343. |
If d is the diameter of the pipe, p is the total internal pressure, f is the permissible tensile stress and n is the effective of the joint, the thickness t of metal pipe, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 344. |
The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called |
| A. | Working pressure |
| B. | Design pressure |
| C. | Test pressure |
| D. | Hydrostatic pressure. |
| Answer» D. Hydrostatic pressure. | |
| 345. |
If p is total internal pressure, d is diameter of pressure conduit and t is thickness of conduit, the Hoop's stress is |
| A. | πdp/t |
| B. | πdp/2t |
| C. | dp/2t |
| D. | dt/2p |
| Answer» D. dt/2p | |
| 346. |
The maximum permissible nitrites in public water supplies, is |
| A. | Nil |
| B. | 0.5 P.P.M. |
| C. | 1.0. P.P.M. |
| D. | 1.5 P.P.M. |
| Answer» B. 0.5 P.P.M. | |
| 347. |
For a network of distribution pipes of a proposed township shown in the below figure, the layout of distribution system, is |
| A. | dead end system |
| B. | grid-iron system |
| C. | ring system |
| D. | radial system |
| Answer» E. | |
| 348. |
The nitrate concentration in domestic water supplies, is generally limited to |
| A. | 10 ppm |
| B. | 15 ppm |
| C. | 25 ppm |
| D. | 45 ppm. |
| Answer» E. | |
| 349. |
45 litres of water per person per day, is provided in |
| A. | office buildings |
| B. | hotels |
| C. | hostels |
| D. | nurse's homes. |
| Answer» B. hotels | |
| 350. |
Estimates of a water supply project depends upon the rate of water supply per capita consumption and probable population estimated at the end of the design period of |
| A. | 5 to 10 years |
| B. | 10 to 15 years |
| C. | 15 to 20 years |
| D. | 20 to 30 years |
| Answer» E. | |