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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.
| 4501. |
The temporary hardness of water can be removed by |
| A. | boiling |
| B. | adding lime |
| C. | adding alum |
| D. | filtration |
| E. | sedimentation. |
| Answer» B. adding lime | |
| 4502. |
Service connections to consumers houses, are generally provided with |
| A. | copper pipes |
| B. | hume pipes |
| C. | galvanised iron pipes |
| D. | P.V.C. pipes |
| E. | none of these. |
| Answer» D. P.V.C. pipes | |
| 4503. |
Sluice valves are fitted in a distribution system |
| A. | along straight length of pipes at suitable intervals |
| B. | at the junctions of the pipes |
| C. | at the branching off points of sub-mains |
| D. | all the above. |
| Answer» E. | |
| 4504. |
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 |
| E. | none of these. |
| Answer» B. are four times costlier than centrifugal pumps | |
| 4505. |
Pick up the incorrect statement from the following. In take of water supply should |
| A. | be nearer to the treatment plant |
| B. | receive water from purer zone of the source |
| C. | be located downstream of waste water disposal point |
| D. | remain easily accessible during floods. |
| Answer» D. remain easily accessible during floods. | |
| 4506. |
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 |
| E. | 1.31 |
| Answer» E. 1.31 | |
| 4507. |
Normal values of overflow rate for plain sedimentation tanks in litres/hr/m2, generally range between |
| A. | 100 to 250 |
| B. | 250 to 500 |
| C. | 500 to 750 |
| D. | 750 to 1000 |
| Answer» D. 750 to 1000 | |
| 4508. |
The 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 | |
| 4509. |
The ratio of total capacity and dead storage is kept |
| A. | 8 |
| B. | 6 |
| C. | 4 |
| D. | 3 |
| E. | 2 |
| Answer» D. 3 | |
| 4510. |
Rapid gravity filters |
| A. | were developed by G.W. Fullar |
| B. | make use of coarser sand with effective size as 0.5 mm |
| C. | yield as high as 30 times the yield of slow sand filters |
| D. | are fed with coagulation treated water |
| E. | all the above. |
| Answer» F. | |
| 4511. |
In an artesian acquifer, the draw downs in two observation wells at distances 100 m, and 200 m were found same after one hour and x hours respectively. The value of x, is |
| A. | 2 hours |
| B. | 4 hours |
| C. | 9 hours |
| D. | 16 hours. |
| Answer» C. 9 hours | |
| 4512. |
Total flow in stream is known |
| A. | run off |
| B. | stream flow |
| C. | discharge |
| D. | all the above. |
| Answer» E. | |
| 4513. |
Disinfection of drinking water is done to remove |
| A. | turbidity |
| B. | odour |
| C. | colour |
| D. | bacterias |
| E. | all the above. |
| Answer» E. all the above. | |
| 4514. |
Alum is a |
| A. | coagulant |
| B. | flocculant |
| C. | catalyst |
| D. | disinfectant. |
| Answer» B. flocculant | |
| 4515. |
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. | <img src="/_files/images/civil-engineering/water-supply-engineering/223-10.289-1.png"> |
| B. | <img src="/_files/images/civil-engineering/water-supply-engineering/223-10.289-2.png"> |
| C. | <img src="/_files/images/civil-engineering/water-supply-engineering/223-10.289-3.png"> |
| D. | <img src="/_files/images/civil-engineering/water-supply-engineering/223-10.289-4.png"> |
| E. | <img src="/_files/images/civil-engineering/water-supply-engineering/223-10.289-5.png"> |
| Answer» E. <img src="/_files/images/civil-engineering/water-supply-engineering/223-10.289-5.png"> | |
| 4516. |
In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively, |
| A. | the reservoir will theoretically be silted in 240 years |
| B. | the reservoir will start reducing after 60 years |
| C. | both (a) and (b) |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 4517. |
Water losses in water supply, is assumed as |
| A. | 5% |
| B. | 7.5% |
| C. | 10% |
| D. | 22.5% |
| E. | 15%. |
| Answer» F. | |
| 4518. |
Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m2 , generally range between |
| A. | 250 to 500 |
| B. | 500 to 750 |
| C. | 750 to 1000 |
| D. | 1000 to 1250 |
| Answer» E. | |
| 4519. |
In a rapid sand filter, air binding is caused due to excessive |
| A. | negative pressure |
| B. | pressure |
| C. | turbidity |
| D. | water pressure |
| E. | all the above. |
| Answer» B. pressure | |
| 4520. |
Ground water from artesian wells |
| A. | contains no suspended materials |
| B. | contains dissolved salts |
| C. | may be saltish and hard |
| D. | generally require lesser treatment |
| E. | all the above. |
| Answer» F. | |
| 4521. |
Property of earth to allow water to pass through it, is known as |
| A. | perviousness |
| B. | porosity |
| C. | permeability |
| D. | transmissibility. |
| Answer» B. porosity | |
| 4522. |
Derivation of Thiem's formula 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. | for hydraulic gradient in Darcy's equation, tangent value is used for sine value |
| E. | all the above. |
| Answer» F. | |
| 4523. |
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 | |
| 4524. |
The capability of a soil mass of full width and depth to transmit water, is known |
| A. | porosity |
| B. | permeability |
| C. | transmissibility |
| D. | none of these. |
| Answer» C. transmissibility | |
| 4525. |
Well treated water is generally supplied for |
| A. | domestic use |
| B. | commercial use |
| C. | public use |
| D. | waste water |
| E. | all the above. |
| Answer» F. | |
| 4526. |
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. | 40 gm/litre |
| E. | 50 gm/litre. |
| Answer» F. | |
| 4527. |
The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is |
| A. | 1 mg/litre |
| B. | 2 mg/litre |
| C. | 3 mg/litre |
| D. | 4 mg/litre |
| E. | 5 mg/litre. |
| Answer» B. 2 mg/litre | |
| 4528. |
If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacity 10 million cubic metres, the dead storage will be filled up, in |
| A. | 10 years |
| B. | 15 years |
| C. | 20 years |
| D. | 25 years |
| E. | 50 years. |
| Answer» E. 50 years. | |
| 4529. |
A circular gravity aqueduct is not generally preferred to because of |
| A. | its maximum hydraulic mean depth |
| B. | maximum area per unit of wetted perimeter |
| C. | minimum cost of construction |
| D. | its proper support on the ground. |
| Answer» E. | |
| 4530. |
Standard unit of turbidity of water is in one litre of distilled water, one milligram of finely divided |
| A. | silica |
| B. | mud |
| C. | clay |
| D. | organic matter. |
| Answer» B. mud | |
| 4531. |
Water is supplied from the source to the treatment plant under gravity in |
| A. | Calcutta |
| B. | Delhi |
| C. | Madras |
| D. | Bombay. |
| Answer» E. | |
| 4532. |
Non-pathogenic bacterias cause the following water borne disease, |
| A. | cholera |
| B. | typhoid |
| C. | infections hepatitis |
| D. | none of these. |
| Answer» E. | |
| 4533. |
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 |
| E. | None of these. |
| Answer» E. None of these. | |
| 4534. |
Pickup the incorrect statement from the following : |
| A. | The invert of pressure conduit is independent of the grade of the hydraulic gradient line |
| B. | The pressure conduits may be taken uphill upto a maximum height of 8.3 m |
| C. | Aqueducts and tunnels sections are generally kept circular |
| D. | None of these. |
| Answer» E. | |
| 4535. |
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. | ratio of volume of basin of a sedimentation tank to the rate of flow |
| E. | all the above. |
| Answer» F. | |
| 4536. |
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. | 14 litres/sec |
| E. | 16 litres/sec. |
| Answer» F. | |
| 4537. |
The order of existence of three portions of water in a reservoir from the bottom to top is |
| A. | useful storage + surcharge storage + dead storage |
| B. | useful storage + dead storage + surcharge storage |
| C. | dead storage + useful storage + surcharge storage |
| D. | surcharge storage + useful storage + dead storage |
| E. | none of these. |
| Answer» D. surcharge storage + useful storage + dead storage | |
| 4538. |
The factor to be considered for the source of city water supply, is |
| A. | quantity and quality of the available water |
| B. | elevation of the source of water |
| C. | general terrain intervening the area |
| D. | all the above. |
| Answer» E. | |
| 4539. |
Pick up the wrong nominal internal diameter of cast iron (spun) pipes in mm from the following : |
| A. | 300 |
| B. | 400 |
| C. | 500 |
| D. | 550 |
| E. | 600 |
| Answer» E. 600 | |
| 4540. |
Hardness of water can be removed by boiling if it is due to |
| A. | calcium bicarbonates |
| B. | calcium sulphates |
| C. | calcium chloride |
| D. | calcium nitrates. |
| Answer» B. calcium sulphates | |
| 4541. |
The ratio of the maximum daily consumption to the average daily demand, is |
| A. | 1.0 |
| B. | 1.2 |
| C. | 1.4 |
| D. | 1.6 |
| E. | 1.8 |
| Answer» F. | |
| 4542. |
The ratio of discharge and plan area of a continuous flow type settling tank, is known |
| A. | surface loading |
| B. | overflow |
| C. | overflow rate |
| D. | all the above. |
| Answer» E. | |
| 4543. |
If the average daily demand of a city of 50, 000 population, is 20 m.l.d., the maximum daily demand is |
| A. | 24 mld |
| B. | 30 mld |
| C. | 36 mld |
| D. | 54 mld. |
| Answer» D. 54 mld. | |
| 4544. |
Recuperation test is carried out to determine |
| A. | turbidity of water |
| B. | pH value of water |
| C. | yield of well |
| D. | discharge from a well. |
| Answer» D. discharge from a well. | |
| 4545. |
Water having pH value as 6, is |
| A. | alkaline |
| B. | acidic |
| C. | neutral |
| D. | none of these. |
| Answer» C. neutral | |
| 4546. |
The discharge for the confined tube well is obtained from |
| A. | Thiem's formula |
| B. | Darcy's formula |
| C. | Tolman's formula |
| D. | Dupuits formula. |
| Answer» E. | |
| 4547. |
Alum is chemically |
| A. | Copper sulphate |
| B. | Aluminium sulphate |
| C. | Ferrous sulphate |
| D. | Ferric sulphate. |
| Answer» C. Ferrous sulphate | |
| 4548. |
The formula Q = P - K[1.8T + 32] in which Q is runoff, P is annual rain fall in cm, T is mean annual temperature in centigrades and K is a constant, is known |
| A. | Justin's formula |
| B. | Khosla's formula |
| C. | English formula |
| D. | Vermule's formula. |
| Answer» C. English formula | |
| 4549. |
While selecting the location of an intake for collecting surface water, the factor considered, is |
| A. | The intake point should be near as far as possible to the treatment plant |
| B. | The intake point should be in purer zone of the water source |
| C. | The intake point should be upstream of the point of disposal of waste water |
| D. | The intake point in meandering rivers should be on concave banks |
| E. | All the above; |
| Answer» F. | |
| 4550. |
Yield of a drainage basin is : |
| A. | run off of the area expressed as instantaneous rate |
| B. | average run off over a short period |
| C. | total volume of water flowing annually |
| D. | all the above. |
| Answer» D. all the above. | |