Important questions about Dam Design and Construction. Dam Design and Construction MCQ questions with answers. Dam Design and Construction exam questions and answers for students and interviews.

What is the formula for limiting height of a gravity dam?

Options

A : a. a

B : b. b

C : c. c

D : d. d

What is the design frequency discharge for road bridges and culverts?

Options

A : a. 1 in 100 years

B : b. 1 in 50 years

C : c. 1 in 75 years

D : d. 1 in 25 years

The existing width of the stream is contracted at the bridge site by _________

Options

A : a. U/s wing walls

B : b. D/s wing walls

C : c. Canal wings

D : d. Drain wings

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

Options

A : a. True

B : b. False

C : c. May be True or False

D : d. Can't say

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?

Options

A : a. i and ii

B : b. ii and iii

C : c. i and iii

D : d. i,ii and iii

The relation between the scour depth (R) and Regime scour depth (R?) for an alluvial river having regime width (W) and contracted width (B) is given by ______

Options

A : a. R = R? (W/B)^0.61

B : b. R = R? (B/W)^0.61

C : c. R = R? (W/B)^0.33

D : d. R = R? (W/B)^0.33

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 ___________

Options

A : a. actual river width

B : b. regime width

C : c. any contracted width

D : d. span length

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

Options

A : a. 6 m

B : b. 8 m

C : c. 10 m

D : d. 12 m

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 _______

Options

A : a. 206.6 m

B : b. 208.5 m

C : c. 207.2 m

D : d. 210.2 m

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

Options

A : a. 5 m

B : b. 7.5 m

C : c. 2.5 m

D : d. 10 m

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

Options

A : a. 0.30

B : b. 0.45

C : c. 0.70

D : d. 1.32

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

Options

A : a. 250 m

B : b. 285 m

C : c. 300 m

D : d. 225 m

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

Options

A : a. True

B : b. False

C : c. May be True or False

D : d. Can't say

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

Options

A : a. True

B : b. False

C : c. May be True or False

D : d. Can't say

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 ______

Options

A : a. 2/3 H

B : b. 2H

C : c. 1.2 H

D : d. 1.5 H

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 __________

Options

A : a. Unwin’s formula

B : b. Broad-crested weir formula

C : c. Orifice formula

D : d. Molesworth formula

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 ___________________

Options

A : a. freeways

B : b. road dips

C : c. causeways

D : d. broadways

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

Options

A : a. Unwin’s formula

B : b. Broad-crested weir formula

C : c. Orifice formula

D : d. Molesworth formula

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

Options

A : a. 0.90

B : b. 0.94

C : c. 0.96

D : d. 0.98

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.