MCQOPTIONS
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MCQOPTIONS
This section includes 260 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
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. | |
| 252. |
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 | |
| 253. |
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 | |
| 254. |
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 | |
| 255. |
Acidity in water is caused due to |
| A. | Mineral acids |
| B. | Free CO2 |
| C. | Iron sulphate |
| D. | Aluminium sulphate |
| Answer» E. | |
| 256. |
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be |
| A. | nil |
| B. | 5 |
| C. | 10 |
| D. | 15 |
| Answer» B. 5 | |
| 257. |
While determining the yield of open wells by the pumping test |
| A. | velocity of recharging water, increases with depression head |
| B. | depression head resulting at critical velocity, is called critical depression head |
| C. | working head is generally limited to rd of the critical depression head |
| D. | maximum safe yield of an open well, is expected at critical depression head. |
| Answer» E. | |
| 258. |
Asbestos pipes are |
| A. | light in weight and easy to transport |
| B. | highly resistant to corrosion |
| C. | high flexible to accommodate deflection upto 12° |
| D. | very much smooth and hydraulically efficient |
| Answer» E. | |
| 259. |
In slow sland filters, the turbidity of raw water can be removed only up to |
| A. | 60 mg/litre |
| B. | 75 mg/litre |
| C. | 100 gm/litre |
| D. | 150 mg/litre. |
| Answer» B. 75 mg/litre | |
| 260. |
Surge tanks are used |
| A. | for storage water |
| B. | to increase the velocity in a pipeline |
| C. | as overflow valves |
| D. | to guard against water hammer. |
| Answer» E. | |