Bridge Engineering
According to IRC:78-1983, for well foundations the minimum dimension of dredge should be not less than ________________
- 2 m
- 5 m
- 7 m
- 9 m
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 ________________
- 1.2H
- 2/3H
- 2H
- 1.5H
In the design of piers, the water pressure is considered
(i) as Static pressure
(ii) as Dynamic pressure
(iii) due to Impact of cross current
- Only (i)
- (i) and (ii)
- (ii) and (iii)
- (i), (ii) and (iii)
The first loading standard in India was published by the IRC in the year ________________
- 1947
- 1950
- 1958
- 1972
In a bridge, Inverted Arch footing is constructed on ________________ to reduce the depth of foundation
- soft soils
- granular soils
- expansive soils
- coarser soils
Bridge Engineering
The minimum clear width of carriageway to be adopted for vehicular traffic of single lane bridge is
- 3.75m
- 4.25m
- 4.75m
- 5.25m
Slab bridges are used for maximum span of
- 6 m
- 9 m
- 12 m
- 15 m
The selection of site for road bridges depends on :
- Nature of river banks and appropriate arches
- Width and depth of river at site to be bridged
- Availability of good and safe foundation for bridge
- All of the above
Which of the following mix is considered to be most suitable for asphalting over the bridge deck?
- Mastic asphalt
- Semi-dense bituminous mix
- Dense bituminous mix
- Bituminous concrete
As per IRC, the class of loading considered the bridges of National Highways
1. Class A loading
2. Class AA loading
3. Class 70R loading
4. Class B loading
Which of the following is true?
- 1 & 2
- 1 & 3
- 1, 2 & 3
- 1, 2, 3 & 4
Bridge Engineering
A bridge is treated as a ‘long-span bridge’ if its span is more than
- 90 m
- 120 m
- 150 m
- 240 m
Which of the following are the examples of Abutments without wind walls?
i. Buried abutment
ii. Tee abutment
iii. Arch abutment
- Only (i)
- (i) and (ii)
- (ii) and (iii)
- (i), (ii) and (iii)
The selection of site for road bridges depends on:
- Nature of river bank and embankments
- Width and depth of river at site to be bridged
- Availability of good and safe foundation for bridge
- All of the above
In erection of bridges the Incremental launching method is used when the bridge decks are greater than
- 250 m in length
- 100 m in length
- 50 m in length
- 300 m in length
For bridge span less than 9m, IRC Class AA and 70R loading of wheeled vehicle, the provision for Impact or Dynamic action (in percentage) is
- 25
- 20
- 12
- 10
Bridge Engineering
The advantages of providing bearings in a bridge is/are
(i) To absorb movement of girder
(ii) To spread the load from the superstructure in such a manner that the bearing stress induced on the material is within the permissible limits.
(iii) To take up vertical movement due to sinking of supports
- Only (ii)
- (i) and (ii)
- (i) and (iii)
- (i), (ii) and (iii)
The most common countermeasure used to prevent scour at bridge abutments is
- Sand bags
- Cut water
- Rip rap
- Turf
Rocker bearing are suitable for spans _________________
- Upto 10 m
- 15 to 20 m
- More than 20 m
- Not suitable for any span
Cables supporting roadway of a suspension bridge is designed to carry ________________
- Point load
- Trapezoidal load
- Uniformly distributed load
- Load as per cable profile
Depending on the transmission of loads to joints, bridges are classified as
- Deck type
- Pratt type
- Warren type
- Howe type
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