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MCQOPTIONS
This section includes 5814 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 4551. |
Aqueducts are generally designed |
| A. | circular |
| B. | rectangular |
| C. | horse shoe section |
| D. | all the above. |
| Answer» E. | |
| 4552. |
A well is considered to be good if it is sunk into |
| A. | Clay |
| B. | Sand |
| C. | Coarse gravel |
| D. | Silt. |
| Answer» D. Silt. | |
| 4553. |
Turbidity of water is expressed |
| A. | in ppm |
| B. | in numbers in an arbitrary scale |
| C. | by pH value |
| D. | by colour code. |
| Answer» B. in numbers in an arbitrary scale | |
| 4554. |
The nitrate concentration in domestic water supplies, is generally limited to |
| A. | 10 ppm |
| B. | 15 ppm |
| C. | 25 ppm |
| D. | 30 ppm |
| E. | 45 ppm. |
| Answer» F. | |
| 4555. |
Sluice valves in main water supplies |
| A. | are used to regulate the flow of water in pipes |
| B. | are spaced about 5 km apart |
| C. | are usually placed at the summits |
| D. | all the above. |
| Answer» E. | |
| 4556. |
The maximum pressure to which a pipe is subjected to during its operation, is known |
| A. | working pressure |
| B. | design pressure |
| C. | test pressure |
| D. | pipe pressure |
| E. | all the above. |
| Answer» B. design pressure | |
| 4557. |
If w is the weight of water per cubic metre, Q is the discharge in cubic metres per sec and H is the total head, the required water horse power of the pump, is |
| A. | <img src="/_files/images/civil-engineering/water-supply-engineering/222-10.263-1.png"> |
| B. | <img src="/_files/images/civil-engineering/water-supply-engineering/222-10.263-2.png"> |
| C. | <img src="/_files/images/civil-engineering/water-supply-engineering/222-10.263-3.png"> |
| D. | <img src="/_files/images/civil-engineering/water-supply-engineering/222-10.263-4.png"> |
| E. | none of these. |
| Answer» B. <img src="/_files/images/civil-engineering/water-supply-engineering/222-10.263-2.png"> | |
| 4558. |
To control the growth of algae in reservoirs, the compound which is used, is |
| A. | bleaching powder |
| B. | copper sulphate |
| C. | lime solution |
| D. | alum solution |
| E. | all the above. |
| Answer» C. lime solution | |
| 4559. |
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 | |
| 4560. |
Hardness of water is caused by |
| A. | presence of soap lather |
| B. | presence of chlorides and sulphates of sodium and potassium |
| C. | presence of bicarbonates, sulphates or chlorides of calcium and magnesium |
| D. | turbidity. |
| Answer» D. turbidity. | |
| 4561. |
A slow sand filter is cleaned if its filter head is higher than |
| A. | 10 cm to 20 cm |
| B. | 20 cm to 40 cm |
| C. | 40 cm to 70 cm |
| D. | 70 cm to 120 cm |
| E. | 120 cm to 150 cm. |
| Answer» E. 120 cm to 150 cm. | |
| 4562. |
A strainer type well sunk through three pervious layers intervened by three impervious aquicludes, draws water from |
| A. | top most pervious layer |
| B. | central pervious layer |
| C. | lowest pervious layer |
| D. | all the pervious layers. |
| Answer» E. | |
| 4563. |
The permissible amount of nitrites present in potable water, is |
| A. | 10 ppm |
| B. | 15 ppm |
| C. | 20 ppm |
| D. | 45 ppm |
| E. | Nil. |
| Answer» F. | |
| 4564. |
Gravity conduits |
| A. | carry water under gravity |
| B. | follow the hydraulic gradient line |
| C. | are carried on trestles in valleys and depressions |
| D. | are carried through tunnels in deep cuttings |
| E. | All the above. |
| Answer» F. | |
| 4565. |
The total domestic consumption in a city water supply, is assumed |
| A. | 20% |
| B. | 30% |
| C. | 40% |
| D. | 60%. |
| Answer» E. | |
| 4566. |
Carbonates in water produce |
| A. | temporary hardness |
| B. | permanent hardness |
| C. | acidity |
| D. | alkanity. |
| Answer» B. permanent hardness | |
| 4567. |
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. | |
| 4568. |
The requirement of water per capita per day, is |
| A. | 90 litres |
| B. | 150 litres |
| C. | 250 litres |
| D. | 400 litres. |
| Answer» B. 150 litres | |
| 4569. |
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. | |
| 4570. |
Permanent hardness of water can be removed by |
| A. | adding alum |
| B. | adding lime |
| C. | adding chlorine |
| D. | boiling |
| E. | zeolite process. |
| Answer» F. | |
| 4571. |
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. | |
| 4572. |
The chloride content of treated water for public supplies should not exceed |
| A. | 100 ppm |
| B. | 150 ppm |
| C. | 200 ppm |
| D. | 250 ppm |
| E. | 300 ppm. |
| Answer» E. 300 ppm. | |
| 4573. |
The maximum permitted loss of head in a rapid sand filter, is |
| A. | 1 m |
| B. | 2 m |
| C. | 3 m |
| D. | 4 m |
| E. | 5 m. |
| Answer» D. 4 m | |
| 4574. |
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. | |
| 4575. |
The efficiency of sedimentation tank does not depend upon |
| A. | depth of tank |
| B. | length of tank |
| C. | detention period |
| D. | velocity of water. |
| Answer» B. length of tank | |
| 4576. |
When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied |
| A. | by pumping system |
| B. | by gravitational system |
| C. | both (a) and (b) |
| D. | all the above. |
| Answer» C. both (a) and (b) | |
| 4577. |
Most important source of water for public water supply, is from |
| A. | lakes |
| B. | ponds |
| C. | streams |
| D. | rivers |
| E. | sea. |
| Answer» E. sea. | |
| 4578. |
Mud balls may be removed by |
| A. | breaking and washing |
| B. | washing the filter with a solution of caustic soda |
| C. | removing, cleaning and replacing the damaged sand |
| D. | all the above. |
| Answer» E. | |
| 4579. |
For maximum alkalinity of water, pH value should be |
| A. | zero |
| B. | less than 7 |
| C. | more than 7 |
| D. | 14 |
| E. | 21 |
| Answer» E. 21 | |
| 4580. |
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 | |
| 4581. |
The four major water supply distribution systems, are |
| A. | dead end, tree, grid iron and reticulation |
| B. | dead end, tree, grid iron and circular |
| C. | tree, grid iron, ring and radial |
| D. | tree, reticulation, circular and ring. |
| Answer» D. tree, reticulation, circular and ring. | |
| 4582. |
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 | |
| 4583. |
Turbidity of water may be caused due to |
| A. | Suspended clay |
| B. | Suspended silt |
| C. | finely divided organic material |
| D. | all the above. |
| Answer» E. | |
| 4584. |
The valve shown in the below figure, is generally known as |
| A. | air valve |
| B. | pressure relief valve |
| C. | sluice valve |
| D. | none of these. |
| Answer» C. sluice valve | |
| 4585. |
The population of a city in 2000 is 50, 000. The average per decade of the previous records of population is 5000 and average percentage per decade is 20%. The population of the city based on geometrical increase method, in the year 2020 will be |
| A. | 56, 000 |
| B. | 60, 000 |
| C. | 64, 000 |
| D. | 70, 000 |
| E. | 72, 000 |
| Answer» F. | |
| 4586. |
The bacterias which require free oxygen for their survival, are called |
| A. | Aerobic bacterias |
| B. | Anaerobic bacterias |
| C. | Faculative bacteria |
| D. | None of these. |
| Answer» B. Anaerobic bacterias | |
| 4587. |
Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of |
| A. | increasing |
| B. | decreasing |
| C. | constant |
| D. | all the above. |
| Answer» B. decreasing | |
| 4588. |
For centrifugal pumps |
| A. | initial cost is low |
| B. | limited space is required |
| C. | the discharge obtained is steady and non-pulsating |
| D. | all the above. |
| Answer» E. | |
| 4589. |
The prescribed hardness limit of potable water ranges between |
| A. | 50 to 75 P.P.M. |
| B. | 75 to 115 P.P.M. |
| C. | 100 to 150 P.P.M. |
| D. | 150 to 200 P.P.M. |
| E. | none of these. |
| Answer» C. 100 to 150 P.P.M. | |
| 4590. |
For plain chlorination of water, the quantity of chlorine used, is |
| A. | 0.1 mg/litre |
| B. | 0.2 mg/litre |
| C. | 0.3 mg/litre |
| D. | 0.4 mg/litre |
| E. | 0.5 mg/litre. |
| Answer» F. | |
| 4591. |
To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is |
| A. | 0.50 m/sec |
| B. | 0.60 m/sec |
| C. | 0.70 m/sec |
| D. | 0.75 m/sec |
| E. | 1.0 m/sec. |
| Answer» E. 1.0 m/sec. | |
| 4592. |
The small sewers are cleaned by |
| A. | flushing |
| B. | cane rodding |
| C. | wooden pills |
| D. | none of these. |
| Answer» B. cane rodding | |
| 4593. |
Fresh sewage may become stale in |
| A. | one hour |
| B. | two to three hours |
| C. | three to four hours |
| D. | six hours. |
| E. | ten hours. |
| Answer» D. six hours. | |
| 4594. |
Nitrogen cycle of sewage, is |
| A. | Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen |
| B. | Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates |
| C. | Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia |
| D. | Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates |
| E. | None of these. |
| Answer» B. Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates | |
| 4595. |
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 | |
| 4596. |
In sewage having fully oxidised organic matter, the nitrogen exists in the form of |
| A. | nitrites |
| B. | nitrates |
| C. | free ammonia |
| D. | aluminoid nitrogen |
| E. | none of these. |
| Answer» C. free ammonia | |
| 4597. |
It is customary to design a sewer for D.W.F. on the basis of |
| A. | average demand |
| B. | twice the average demand |
| C. | thrice the average demand |
| D. | four times the average demand. |
| Answer» D. four times the average demand. | |
| 4598. |
During preliminary treatment of a sewage |
| A. | Oil and grease are removed from skimming tanks |
| B. | Floating materials are removed by screening |
| C. | Girt and sand are removed by girt chambers |
| D. | All the above. |
| Answer» E. | |
| 4599. |
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 |
| E. | 2500 litres/km/cm. |
| Answer» E. 2500 litres/km/cm. | |
| 4600. |
For a circular sewer of diameter D running partially full with central angle , |
| A. | <img src="/_files/images/civil-engineering/waste-water-engineering/182-9.52-1.png"> |
| B. | <img src="/_files/images/civil-engineering/waste-water-engineering/182-9.52-2.png"> |
| C. | <img src="/_files/images/civil-engineering/waste-water-engineering/182-9.52-3.png"> |
| D. | <img src="/_files/images/civil-engineering/waste-water-engineering/182-9.52-4.png"> |
| E. | all the above. |
| Answer» F. | |