Q. For purely rigid streams, the foundation of the bridge substructure is taken above the bed.

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Q. Consider the following statements for quasi-alluvial streams.

i. The bed is not pitched and sides are banked with stable soils or pitching
ii. The bridge span length is equal to the length of water line between banks measured along HFL
iii. The stream is not contracted

Which of the following statements are correct?

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Q. 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 ______

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Q. 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 ___________

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Q. Culverts are all those road bridges whose spans are up to ________

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Q. 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 _______

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Q. Calculate the value of maximum scour depth for a single span structure having normal scour depth 5m.

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Q. The average grain size of the bed material is 0.16 mm for medium silt, Lacey’s silt factor is likely to be _______

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Q. The waterway for a bridge on the river in alluvial plain having a dominant discharge of 3600 cumecs should be ________ m.

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Q. Greater is the afflux, lesser will be the available clearance for the same deck level.

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Q. Greater is the reduction in the linear waterway, the lesser is the afflux.

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Q. The proposed masonry arch bridge having the total height of its abutments or piers from top to bottom as H can be proposed to have economical spans each equal to ______

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Q. A bridge culvert is to be constructed across a proposed lined canal. The afflux at this site for a contracted canal width can be computed by __________

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Q. While going to the Tirupati Tirumala Devasthanam from Madras, highway road is found to be lowered at several places over which natural drainage flow during the rainy season. Such dips in the roads are called ___________________

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Q. Which of the following formula is valid when the downstream depth is more than 80% of the upstream depth?

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Q. What is the value of the coefficient of discharge for the wide bridge opening with floors?

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Q. Calculate the economic length of one span for RCC Slab Bridge if the total height of abutment or pier from the bottom of its foundation to its top is 6m.

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Q. In Broad Crested Weir formula, the discharge is dependent on ________________

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Q. Calculate the longitudinal braking force (P) for four-lane bridges designed for class 70R loading.

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Q. The greater is the heading up of water at the inlet end, the greater will be the flow velocity in case of culvert across some flat terrain.

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