MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. | 0.3 |
| 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 = Re (W/B)0.61 |
| B. | R = Re (B/W)0.61 |
| C. | R = Re (W/B)0.33 |
| D. | R = Re (W/B)0.33 |
| E. | for an alluvial river having regime width (W) and contracted width (B) is given by ______a) R = Re (W/B)0.61b) R = Re (B/W)0.61c) R = Re (W/B)0.33d) R = Re (W/B)0.33 |
| Answer» B. R = Re (B/W)0.61 | |
| 8. |
Consider the following statements for quasi-alluvial streams.i. The bed is not pitched and sides are banked with stable soils or pitchingii. The bridge span length is equal to the length of water line between banks measured along HFLiii. The stream is not contractedWhich of the following statements are correct? |
| A. | i and ii |
| B. | ii and iii |
| C. | i and iii |
| D. | i,ii and iii |
| Answer» B. ii and iii | |
| 9. |
For purely rigid streams, the foundation of the bridge substructure is taken above the bed. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
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 | |
| 11. |
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 | |