MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Irrigation Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The waterway for a bridge on the river in alluvial plain having a dominant discharge of 3600 cumecs should be ________ m. |
| A. | 250 m |
| B. | 285 m |
| C. | 300 m |
| D. | 225 m |
| Answer» C. 300 m | |
| 2. |
The average grain size of the bed material is 0.16 mm for medium silt, Lacey s silt factor is likely to be _______ |
| A. | 0.30 |
| B. | 0.45 |
| C. | 0.70 |
| D. | 1.32 |
| Answer» D. 1.32 | |
| 3. |
Calculate the value of maximum scour depth for a single span structure having normal scour depth 5m. |
| A. | 5 m |
| B. | 7.5 m |
| C. | 2.5 m |
| D. | 10 m |
| Answer» C. 2.5 m | |
| 4. |
A road bridge is proposed to be constructed across an alluvial stream with the estimated design discharge as 2500 m3/s. It is decided to adopt a total effective waterway equal to 300 m for this bridge as against the regime width of 237.5 m due to afflux considerations. If the HFL at the site is at RL 214 m, then the RL of the open foundation can be suggested as _______ |
| A. | 206.6 m |
| B. | 208.5 m |
| C. | 207.2 m |
| D. | 210.2 m |
| Answer» B. 208.5 m | |
| 5. |
Culverts are all those road bridges whose spans are up to ________ |
| A. | 6 m |
| B. | 8 m |
| C. | 10 m |
| D. | 12 m |
| Answer» C. 10 m | |
| 6. |
The Lacey s scour depth R given by equation R = 0.473 (Q/f)1/3 is applicable when the river width is equal to ___________ |
| A. | actual river width |
| B. | regime width |
| C. | any contracted width |
| D. | span length |
| Answer» C. any contracted width | |
| 7. |
The relation between the scour depth (R) and Regime scour depth (Re) for an alluvial river having regime width (W) and contracted width (B) is given by ______ |
| A. | R = R<sub>e</sub> (W/B)<sup>0.61</sup> |
| B. | R = R<sub>e</sub> (B/W)<sup>0.61</sup> |
| C. | R = R<sub>e</sub> (W/B)<sup>0.33</sup> |
| D. | R = R<sub>e</sub> (W/B)<sup>0.33</sup> |
| Answer» B. R = R<sub>e</sub> (B/W)<sup>0.61</sup> | |
| 8. |
For purely rigid streams, the foundation of the bridge substructure is taken above the bed. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
The existing width of the stream is contracted at the bridge site by _________ |
| A. | U/s wing walls |
| B. | D/s wing walls |
| C. | Canal wings |
| D. | Drain wings |
| Answer» B. D/s wing walls | |
| 10. |
What is the design frequency discharge for road bridges and culverts? |
| A. | 1 in 100 years |
| B. | 1 in 50 years |
| C. | 1 in 75 years |
| D. | 1 in 25 years |
| Answer» C. 1 in 75 years | |