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Civil Engineering
1000 Prestressed Concrete Structures
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Q.1
What is prestress concrete?
a) Strengthening a material by the application of stress during packaging
b) Strengthening a material by the application of stress during manufacture
c) Smoothening a material by the application of stress during manufacture
d) None of the above
Q.2
Why a concrete is prestressed?
a) To reduce the amount of concrete used in construction
b) To reduce the amount of materials used and transported
c) To improve durability and service life
d) All of the above
Q.3
What is loss of stress in prestress?
a) Slow lowering of the induced compressive stress in a prestressed part
b) Slow lowering of the induced compressive strain in a prestressed part
c) Slow lowering of the induced compressive tension in a prestressed part
d) Slow lowering of the friction in a prestressed part
Q.4
Which of the following basic concept is involved in the analysis of prestressed concrete members?
a) Principle stresses
b) Combined and bending stresses
c) Overhead stresses
d) Shear stresses
Q.5
Which of the following concrete offers pleasant appearance and durability?
a) Shrinkage concrete
b) Reinforced concrete
c) Hardened concrete
d) Prestressed concrete
Q.6
Prestressed concrete is widely used in construction by ___________
a) Bore wells
b) Houses
c) Nuclear pressure vessels
d) Roofs
Q.7
The concept is used in many branches of civil engineering and building construction?
a) Lump sum concrete
b) Reinforced concrete
c) Prestressed concrete
d) Steel concrete
Q.8
The necessity of high strength concrete in prestressed concrete is due to ___________
a) Loading and Unloading
b) Cracking
c) Bending
d) Shear and Bonding
Q.9
In case of continuous prestressed concrete members to gain continuity, splicing is done by ___________
a) Tendons
b) Concrete
c) Steel
d) Reinforcement
Q.10
The classification of prestressed concrete is based on the method of ___________
a) Bending moments
b) Stresses acting
c) Designing
d) Loading
Q.11
Prevention of bond between the steel and concrete is known as ___________
a) De bonding
b) Proof stress
c) Bond prestressed concrete
d) Axial prestressing
Q.12
Prestressed concrete tanks have been widely used for the storage of __________
a) Fluids
b) Gas
c) Water
d) Air
Q.13
The overall economy in using prestressed concrete reduces?
a) Bars
b) Anchorages
c) Tendons
d) Design loads and costs
Q.14
The resultant stresses in concrete at any section are obtained by the effect of ___________
a) Prestress and torsion stresses
b) Prestress and shear stresses
c) Prestress and flexural stresses
d) Prestress and bending stresses
Q.15
The failure due to fracture of steel in tension in the beam is because of __________
a) Least amount of prestressed concrete
b) Least amount of reinforcement
c) Excess amount of steel reinforcement
d) Excess amount of prestressed concrete
Q.16
The concept of pressure line is very useful in understanding the concept of ___________
a) Bending mechanism
b) Shear mechanism
c) Torsion mechanism
d) Load carrying mechanism
Q.17
The soffit of the beam after the transfer of prestress to concrete will be under ____________
a) Bondage
b) Breakage
c) Compression
d) Tension
Q.18
The concrete members which are prestressed by providing the tensioned tendons are termed as ____________
a) Linear prestressed members
b) Circular prestressed members
c) Pre tensioning members
d) Internally prestressed members
Q.19
Which of the following influence the deflections of prestressed concrete members?
a) Wall profile
b) Type of aggregates
c) Type of cement
d) Cable profile
Q.20
The prestressed concrete member develops deformation under the influence of __________
a) Self weight
b) Stress strain diagram
c) Flexural moments
d) Prestress and transverse loads
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