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Building Maintenance MCQ Questions & Answers | Civil Engineering

Learn Building Maintenance MCQ questions & answers are available for a Civil Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Building MaintenanceMCQ question is the important chapter for a Civil Engineering and GATE students. Page-7 section-1

61
The repair and rehabilitation of damaged or spalled concrete is done by removing the ____________
Discuss
Answer & Solution
Answer: Option A
Solution:
By removing the loose concrete, the repair and rehabilitation of damaged or spalled concrete is done. Temporary support is provided to the girder to relieve dead load stresses and the case of pretressed concrete bridge decks, special stress check up is essential before starting the repair works.
62
In many cases of heavily loaded girders, shear distress is observed near the ____________
Discuss
Answer & Solution
Answer: Option B
Solution:
In the form of diagonal tension cracks and shear cracks, shear distress is observed near the supports in many cases of heavily loaded girders. Tension cracks and shear cracks may arise due to improper detailing or compaction of concrete near the support zone in such cases holes are drilled diagonally and rebars are placed and grouted to arrest the shear cracks.
63
Bridge girders located in zones of very severe exposure conditions suffer ____________
Discuss
Answer & Solution
Answer: Option A
Solution:
Bridge girders located in zones of very severe exposure conditions suffer spalling. extensive spalling of concrete exposing the reinforcements and in such cases the unsound or loose concrete around the girders is removed and repairing against the loss of concrete section is done by jacketing the girders using a steel form.
64
The crack propagation in the concrete girders can be arrested by using the principles of ____________
Discuss
Answer & Solution
Answer: Option B
Solution:
Crack propagation in the concrete girders can be arrested by the principles of post tensioning and tensile cracking in the girder are arrested by including compression using tension ties forced to the sides of the girder at locations of tensile cracks.
65
In some cases of repairs of girders damaged by collision, the damage is severe what is used?
Discuss
Answer & Solution
Answer: Option C
Solution:
Links and dowels are used in some cases of repairs of girders damaged by collision when the damage is severe. Links and dowels are used along with wire mesh tied to the reinforcements and the entire damaged part is repaired using mortar or non shrink grout.
66
The corrosion of reinforcement due to extreme exposure is common for structure located in ____________
Discuss
Answer & Solution
Answer: Option B
Solution:
The corrosion of reinforcement due to extreme exposure is common for structure located in costal zones. The high tensile strands may get damaged resulting in loss of prestresss in the girder.
67
In case of damaged prestressed concrete I girders which are used for restoring strength?
Discuss
Answer & Solution
Answer: Option B
Solution:
Post tensioning rods in conjugation with jacking can be used for restoring strength in case of damaged prestressed concrete I girders.
68
In restoration of strength by adding external reinforced concrete the damages concrete is first repaired by applying ____________
Discuss
Answer & Solution
Answer: Option A
Solution:
In restoration of strength by adding external reinforced concrete the damages concrete is first repaired by applying preload and the concrete a corbels are constructed with the required conventional steel reinforcement and it shows adding external reinforcement concrete to restore the strength of the damaged girder.
69
In method 3 the restoration is done by addition of ____________
Discuss
Answer & Solution
Answer: Option A
Solution:
Metal sleeve jacket is added in method 3 to do the restoration. In this method preload is applied before the repair of the damaged concrete and removed after the completion of repairs and a metal sleeve jacket is installed around and beyond the damaged area and the gap between the metal sleeve girders is filles with epoxy grout by pressure injection.