Prestressed Concrete Structures Mcqs

Q:

The investigations revealed that the bearings were not at ____________

A) 60 degrees B) 30 degrees
C) 90 degrees D) 20 degrees
 
Answer & Explanation Answer: A) 60 degrees

Explanation: The investigations revealed that the bearings were not at right angles to the axis of the bridge and the level of downstream side bearing was lower by 35mm as compared to the elevation of upstream bearing and hence due to transfer inclination of the bearings towards downstream, the span had a tendency to move in the transverse direction.

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26
Q:

The suspended span comprises of how many prestressed concrete girders?

A) 4 B) 2
C) 6 D) 1
 
Answer & Explanation Answer: B) 2

Explanation: The suspended span comprises of two prestressed concrete girders with reinforced concrete deck slab of span 40.6m and cast steel rocker and roller bearings have been provided at articulations for supporting the suspended span and soon after the bridge was constructed and opened to traffic in1975, it developed distress due to improper placing of roller bearings.

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17
Q:

The Chambal bridge is on a state highway connecting which states?

A) Karnataka and Kerala B) Delhi and Hyderabad
C) Uttar Pradesh and Madhya Pradesh D) West Bengal and Assam
 
Answer & Explanation Answer: C) Uttar Pradesh and Madhya Pradesh

Explanation: The Chambal bridge is on a state highway connecting Uttarpradesh and Madhya Pradesh, built across river Chambal near etawah in Uttarpradesh and the bridge is 592m long with a bridge deck comprising of single cell reinforced concrete box girders of 11.1m length projecting on either side of the pier and the suspended span comprises of two prestressed concrete girders with reinforced concrete deck slab of span 40.6m.

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18
Q:

The restoration of the end block of the girder can be done completely dismantling the ____________

A) Concrete B) Cement
C) Water D) Aggregates
 
Answer & Explanation Answer: A) Concrete

Explanation: The restoration of the end block of the girder was done by completely dismantling the concrete in the end block after distressing of the cables and new reinforcement was welded with the existing reinforcement of the girder and new concrete with vertical joint was provided with extra care.

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13
Q:

The super structure of Katepura bridge in Maharashtra state comprises of ____________

A) Cantilever beam B) SSB
C) Point D) Simple beam
 
Answer & Explanation Answer: B) SSB

Explanation: The super structure of Katepura bridge in Maharashtra state comprises of simply supported concrete girders with reinforced concrete structures deck slab and the bridge has 4 spans of 37.8m and the girders were cast in place over temporary staging and side shifted to position after necessary post tensioning of the girders.

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42
Q:

The deck in Quinton bridge in U.K is made of ____________

A) Voided slabs B) Concrete slabs
C) Prestressed slabs D) Elongated slabs
 
Answer & Explanation Answer: A) Voided slabs

Explanation: The deck is made up of voided slabs 90-105cm thick and routine inspection indicated cracks in the soffit of end and central sections and review of design calculations indicated deficient tensile reinforcements at certain locations of the deck slabs, the following two rehabilitation methods were examined: installation of prestressing elements and external reinforcement with bonded on steel plates.

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37
Q:

The super structure of Obra singrauli bridge, located on eastern railway in Indian is of span ____________

A) 14.3 B) 18.3m
C) 16.3m D) 12.3m
 
Answer & Explanation Answer: B) 18.3m

Explanation: The super structure of Obra singrauli bridge located on eastern railway in India comprises of 4 numbers of 18.3m spans and one number of 24.4m span and decking is made up of two prestressed concrete girders stressed with Freyssinet system of post tensioning and after 15 years of service the prestressed girders developed large number of cracks at the junction of girder and deck slab on both internal and external faces.

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27
Q:

The concrete deck slab and girders of Gizener bridge, Switzerland was built in the year?

A) 1911 B) 1920
C) 1915 D) 1900
 
Answer & Explanation Answer: A) 1911

Explanation: The concrete deck slab and girders of this bridge built in the year 1911 and located in Switzerland has to be strengthened to withstand planned future loading and the damaged parts of the bridge deck slab was repaired using epoxy resin mortar.

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