Prestressed Concrete Structures MCQ (Multiple Choice Questions)

Here are 1000 Prestressed Concrete Structures MCQ (Chapterwise).

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
View Answer

Answer: b
Explanation: Prestressed concrete is a structural material that allows engineers to place predefined engineering stresses in parts to offset the stresses that arise when they are loaded.

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
View Answer

Answer: d
Explanation: Prestressing can reduce the amount of concrete used in construction, as well as the amount of materials used and transported, while also improving durability and service life. Concrete has a high resistance to compressive loads, but it has a significantly lesser resistance to tension.

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
View Answer

Answer: a
Explanation: Prestressing is the practise of applying compressive stress to concrete in order to mitigate tensile strains caused by a load. Losses of prestress are the slow lowering of the induced compressive stress in a prestressed part due to a variety of factors.

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
View Answer

Answer: b
Explanation: The basic concept involved in the analysis of prestressed concrete members is concept of combined direct and bending stresses used for columns whereas principle and shear stresses are formed in case of tensioning the prestressed and reinforced structures, overhead stresses are formed while the stresses in structures goes beyond safe limit provided by different codes.

5. Which of the following concrete offers pleasant appearance and durability?
a) Shrinkage concrete
b) Reinforced concrete
c) Hardened concrete
d) Prestressed concrete
View Answer

Answer: d
Explanation: Prestressed concrete offers pleasant appearance and durability when compared to reinforced concrete and the two structural features of prestressed concrete, namely high strength concrete and freedom from cracks, contributes to the improved durability of structure under aggressive environmental conditions.
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6. Prestressed concrete is widely used in construction by ___________
a) Bore wells
b) Houses
c) Nuclear pressure vessels
d) Roofs
View Answer

Answer: c
Explanation: Prestressed concrete is used in construction of long span bridges, industrial roofs, marine structures, nuclear pressure vessels, water retaining structures, railway sleepers etc and it also has a higher modulus of elasticity and small creep strain, resulting in smaller loss of prestressing in the steel while prestressed concrete is one of the construction material in building and bridge products around the world.

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
View Answer

Answer: c
Explanation: Prestressed concrete is widely used in many branches of civil engineering and building construction and in recent days it is experiencing greatest growth in the field of commercial building because of its acoustic properties and its ability to provide long open space.

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
View Answer

Answer: d
Explanation: High strength concrete is necessary in prestressed concrete, as the material offers high resistance in tension, shear, bond and bearing while loading and unloading, cracking, bending actions are actions occurring at the time of transfer of concrete.

9. In case of continuous prestressed concrete members to gain continuity, splicing is done by ___________
a) Tendons
b) Concrete
c) Steel
d) Reinforcement
View Answer

Answer: a
Explanation: A stretched element used in a prestressed concrete member which serves the purpose of transmitting the prestress to concrete and it may be in the form of high tensile steel wires, cables or strands.

10. The classification of prestressed concrete is based on the method of ___________
a) Bending moments
b) Stresses acting
c) Designing
d) Loading
View Answer

Answer: c
Explanation: Classification of prestressed concrete is based on the method of design like externally, internally, partial, moderate, axial, eccentric, concordant, uni-axial, biaxial, tri-axial, non distortional, linear, circular, post and pre tensioning, prestressed concrete has considerable increase resilience due to its capacity for completely recovering from substantial effects of overloading without undergoing any serious damage.

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
View Answer

Answer: a
Explanation: Prevention of bond between the steel wire and the surrounding concrete is known as de bonding, the concrete in which prestress is imparted to concrete through bond between tendons and surrounding concrete, members in which the entire cross section of concrete has a uniform compressive prestressing is termed as axial prestressing, the tensile stress in steel which produces a strain of 0.2 percent of the original gauge length on unloading is proof stress.

12. Prestressed concrete tanks have been widely used for the storage of __________
a) Fluids
b) Gas
c) Water
d) Air
View Answer

Answer: a
Explanation: Prestressed concrete tanks have been widely used for storage of fluids, such as water, oil, gas, sewage, granular materials like cement, process liquids and chemicals, slurries and more recently cryogens water storage tanks of large capacity are invariably made of prestressed concrete recent applications include special forms of prestressed concrete tanks, which are triaxially prestressed and serve as containment vessels and biological shields for nuclear reactors.

13. The overall economy in using prestressed concrete reduces?
a) Bars
b) Anchorages
c) Tendons
d) Design loads and costs
View Answer

Answer: d
Explanation: An overall economy in using prestressed concrete decreases the dead weight due to which the design loads and cost of foundation reduces although there is considerable saving on the quantity of materials used in prestressed concrete members in compression with reinforced concrete members, it is not much significant due to additional costs incurred for high strength concrete, tensile steel, anchorages and other hard wires required for the production of prestressed member.

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
View Answer

Answer: c
Explanation: Resultant stresses in concrete at any section are obtained by superimposing the effect of prestress and flexural stresses developed due to the loads, other common types of corrosion frequently encountered in prestressed concrete construction are pitting corrosion and chloride corrosion, a critical review of the different types of corrosion of high tensile steel in structural concrete is reported.
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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
View Answer

Answer: b
Explanation: The percentage of steel provided, both tensioned and un tensioned taken together should be sufficient so that when the concrete in the pre compressed tensile zone cracks, the steel is in a position to bear the additional tensile stresses transferred to it by the cracking of the adjacent fibers of the concrete, thereby preventing a sudden failure of the beam due to fracture of steel in tension.

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
View Answer

Answer: d
Explanation: The concept of pressure line is very useful in understanding the load carrying mechanism of a prestressed concrete section, if a prestressed concrete member is cracked, it behaves similar to that of a reinforced concrete section, in contrast to the direct method of analysis of resultant stresses at a section of a prestressed concrete beam outlined the pressure or thrust line concept can also be used to evaluate stresses.

17. The soffit of the beam after the transfer of prestress to concrete will be under ____________
a) Bondage
b) Breakage
c) Compression
d) Tension
View Answer

Answer: c
Explanation: The bending moment at which visible cracks developed in prestressed concrete members is generally referred to as the cracking moment after the transfer of prestress to concrete, the soffit of the beam will be under compression.

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
View Answer

Answer: d
Explanation: The concrete members which are prestressed by providing the tensioned tendons are termed as internally prestressed members due to bending moment in the beam is developed and the bending in the beam results in change of unit stresses, unit strains in the tendons.

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
View Answer

Answer: d
Explanation: The deflections of prestressed concrete members are influenced by the following salient features: imposed load and self weight, magnitude of the prestressing force, cable profile, and second moment of area of cross section, modulus of elasticity of concrete, shrinkage, creep, relaxation, span, and fixity conditions.
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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
View Answer

Answer: d
Explanation: The prestressed concrete members develop deformation under the influence of two usually opposing effects, which are the prestress effects and transverse loads and the deflections caused are to be changed first because the loss incurred due to prestress which in turn decreases the deflection and effects of creep which increases the deflection are suggested in the method for long term deflections.

21. If the direct stresses are compressive, then the magnitude of principal stresses in prestressed concrete member gets __________
a) Zero
b) Increased
c) Decreased
d) Constant
View Answer

Answer: b
Explanation: If the direct stresses are compressive, then the magnitude of principal stresses in prestressed concrete member acts reduced considerably and therefore under working loads, these principal stresses have to be compressive in nature in order to eliminate diagonal cracks in concrete.

22. The ultimate shear resistance of prestressed concrete with web shear cracking but without flexural crakes & mainly governed by __________
a) Zero
b) Limiting value
c) Infinity
d) Constant value
View Answer

Answer: b
Explanation: The ultimate shear resistance of prestressed concrete sections with web shear cracking but without flexural cracks, is mainly governed by the limiting value of the principal tensile stress developed in concrete, the failure is assumed to take place when the principal tension exceeds the tensile strength of concrete.

23. The failure of prestressed concrete member without additional un tensioned reinforcement, to that of plain concrete is?
a) 1
b) Zero
c) 4
d) Less
View Answer

Answer: d
Explanation: The failure of a prestressed concrete member without additional un tensioned reinforcement, under pure torsion, is more or less similar to that of plain concrete where sudden failure is imminent almost simultaneously with the formation of first crack.

24. In the anchorage zone or the end block of a post tensioned prestressed concrete element, the state of stress distribution is considered as ____________
a) Unity
b) Zero
c) Complex
d) Easy
View Answer

Answer: c
Explanation: In the anchorage zone or the end block of a post tensioned prestressed concrete element, the state of stress distribution is complex and three dimensional in nature, in most post tensioned members the prestressing wires are introduced in cable holes or ducts, preformed in the members, and then stressed and anchored at the end faces.

25. The short term deflections of prestressed members of class-1 and class-2 types under service loads are influenced by?
a) Depth of prestressing force
b) Magnitude of prestressing force
c) Eccentricity of prestressing force
d) Length of prestressing force
View Answer

Answer: b
Explanation: Short term deflections of prestressed members of class-1 and class-2 types under service loads are influenced by: magnitude of the prestressing force and its profile, applied load and self weight of the member and flexural rigidity of the Un cracked concrete sections.

26. Due to presence of precompression, prestressed concrete is ideally suited for the design of members subjected to ____________
a) Prestressed tension
b) Principle stress
c) Bonded stress
d) Axial tension
View Answer

Answer: d
Explanation: Due to presence of precompression, prestressed concrete is ideally suited for the design of members subjected to axial tension and the axial tension in a member depends upon the direction of tension acting on a member and its reaction.

27. Due to the effect of composite action sizes of precast prestressed units can be ______________
a) Serviced
b) Increased
c) Deducted
d) Reduced
View Answer

Answer: d
Explanation: The sizes of precast prestressed units can be reduced due to the effect of composite action and low ratio of size of the precast unit to that of the whole component member and appreciable saving in the cost of steel in a composite member compared with a reinforced or prestressed concrete member.

28. The maximum permissible stresses are mainly governed by ___________
a) Principle stresses
b) Ultimate stress
c) Compressive stresses
d) Tensile stresses
View Answer

Answer: c
Explanation: The maximum permissible stresses in the precast prestressed concrete and the insitu cast concrete are mainly governed by the compressive strength of concrete in the respective elements and in general the permissible stresses in a precast prestressed concrete are governed by the normal rules for prestressed concrete.

29. Long span continuous prestressed concrete bridges are built of which type of box girders?
a) 4 celled
b) Multi celled
c) 3 celled
d) Single celled
View Answer

Answer: b
Explanation: Long span continuous prestressed concrete bridges are built of which type of box girders multi celled box girders segments of variable depth using the post tensioning system, and typical cross sections of post tensioned prestressed concrete bridge decks and salient features of the cantilever construction method using cast insitu segments and precast concrete elements.

30. Another example of application of prestressed concrete in buildings can be seen in construction of __________
a) 11 – storied structure
b) 12 – storied structure
c) 10 – storied structure
d) 14 – storied structure
View Answer

Answer: a
Explanation: 11 storied cast in situ reinforced concrete structure which has the upper 8 stores resting on reinforced concrete arched girders with prestressed concrete ties spanning nearly 18m this is suited for large columns free space for conference halls, auditoriums, sports stadiums, industrial structures and in such cases prestressed concrete is invariably selected due to its inherent high strength durability and economy.

31. The grade of concrete used for construction of prestressed concrete structures is?
a) Design mix concrete
b) Fully mix concrete
c) Partially mix concrete
d) Heavy mix concrete
View Answer

Answer: a
Explanation: The most important consideration in the construction of prestressed concrete structures is the design, production and control of high strength concrete with desirable properties the minimum grade specified in the Indian standard code IS: 1343: 2005 for post tensioned concrete is M30 and for prestressed concrete work it is M40, the code also specifies the only Design mix concrete should be used to ensure the desired strength and durability.

32. Prestressed concrete has more or less replaced ____________
a) Prestressed concrete
b) Aluminium concrete
c) Voids concrete
d) Reinforced concrete
View Answer

Answer: d
Explanation: Prestressed concrete has more or less replaced reinforced concrete as the most suitable material for bridge construction due to its inherent advantages of high strength coupled with durability, energy absorption under dynamic loads, ability to resist repetitive loads, freedom from cracks, easy mould ability to desired shape, economy and ease of maintenance.

33. An example to plan aircraft hanger using prestressed concrete which is ideally suitable for large spans?
a) Spain airlines airbus hanger
b) American airlines airbus hanger
c) Africa airlines airbus hanger
d) Indian airlines airbus hanger
View Answer

Answer: d
Explanation: The present method is to plan aircraft hangers using prestressed concrete which is ideally suitable for large spans with reduced maintenance costs due to superior durability characteristics of prestressed concrete and an excellent example of this type is the roof of the Indian airlines hanger in Bombay.

34. An example of the application of prestressed concrete in aqueducts in India is?
a) Penna
b) Krishna
c) Yamuna
d) Gomati
View Answer

Answer: d
Explanation: An example of the application of prestressed concrete in aqueducts in India is Gomati aqueduct having 12 equal spans of 31.8m and the structure is designed as a box section of 12.8m by 6.7m and carries a discharge of 357 cumecs and the depth of the two main prestressed concrete girders is 9.9m and weights as much as 550 tones per girder per span.


Chapterwise Multiple Choice Questions on Prestressed Concrete Structures

Prestressed Concrete Structures MCQ - Multiple Choice Questions and Answers

Our 1000+ MCQs focus on all topics of the Prestressed Concrete Structures subject, covering 100+ topics. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice.
  1. Introduction of Prestressing
  2. Materials for Prestressed Concrete
  3. Prestressing Systems
  4. Analysis of Prestress and Bending Stress
  5. Losses of Prestress
  6. Deflections of Prestressed Members
  7. Flexural Strength of Prestressed Sections
  8. Shear Strength of Prestressed Sections
  9. Transfer of Prestress
  10. Anchorage Zone Stresses in Post Tensioned Members
  11. Limit State Design Criteria
  12. Design of Prestressed Concrete Sections
  13. Design of Pretensioned and Post-Tensioned Members
  14. Composite Beams and Deflections
  15. Statically Indeterminate Structures
  16. Prestressed Concrete Pipes, Slabs, Grid Floors, Tanks, Shell, Folded Structures, Poles and Sleepers
  17. Optimum Design of Prestressed Structures
  18. Prestressed Concrete Bridges & Trusses
  19. Planning and Economical Aspects of Prestressing
  20. Construction, Maintenance and Rehabilitation of Prestressed Structures

1. MCQ on Introduction of Prestressing

The section contains Prestressed Concrete Structures multiple choice questions and answers on basic concepts, historic development, needs, terminology, advantages, limitations, principles and classifications of prestressing.

  • Basic Concepts
  • Historic Development
  • Need and Terminology
  • Advantages and Limitations
  • Principles and Classifications of Prestressing
  • 2. Multiple Choice Questions on Materials for Prestressed Concrete

    The section contains Prestressed Concrete Structures questions and answers on high strength concrete and high tensile steel.

  • High Strength Concrete
  • High Tensile Steel
  • 3. MCQ on Prestressing Systems

    The section contains Prestressed Concrete Structures MCQs on pre and post tensioning systems, tensioning devices, thermo electric prestressing and chemical prestressing.

  • Pretensioning Systems
  • Post Tensioning Systems
  • Tensioning Devices
  • Thermo Electric Prestressing
  • Chemical Prestressing
  • 4. Multiple Choice Questions on Analysis of Prestress and Bending Stress

    The section contains Prestressed Concrete Structures multiple choice questions and answers on basic assumptions, resultant stresses, load balancing, tendons stresses, cracking moments.

  • Basic Assumptions
  • Resultant Stresses
  • Concept of Load Balancing
  • Stresses in Tendons
  • Cracking Moments
  • 5. MCQ on Losses of Prestress

    The section contains Prestressed Concrete Structures questions and answers on losses nature, losses due to elastic deformation, shrinkage, concrete, friction and anchorage slip.

  • Nature of Losses
  • Loss Due to Elastic Deformation
  • Loss Due to Shrinkage
  • Loss Due to Creep of Concrete
  • Loss Due to Relaxation of Stress in Steel
  • Loss Due to Friction
  • Loss Due to Anchorage Slip
  • 6. Multiple Choice Questions on Deflections of Prestressed Members

    The section contains Prestressed Concrete Structures MCQs on deflections factors, short and long term deflections, code practice and cracked members deflections.

  • Importance and Factors Influencing Deflections
  • Short Term Deflections
  • Long Term Deflections
  • Deflections of Cracked Members
  • Codes of Practice
  • 7. MCQ on Flexural Strength of Prestressed Sections

    The section contains Prestressed Concrete Structures multiple choice questions and answers on flexural failure types, strain compatibility method, sections elastic design, cable profile and layout.

  • Types of Flexural Failure
  • Strain Compatibility Method
  • Elastic Design of Sections
  • Cable Profile and Cable Layout
  • 8. Multiple Choice Questions on Shear Strength of Prestressed Sections

    The section contains Prestressed Concrete Structures questions and answers on shear and principal stresses, ultimate shear resistance, shear reinforcement design and torison members.

  • Shear and Principal Stresses
  • Ultimate Shear Resistance
  • Design of Shear Reinforcement
  • Torsion Members
  • 9. MCQ on Transfer of Prestress

    The section contains Prestressed Concrete Structures MCQs on bond transmission, transmission length, bond stresses, transverse tensile stresses and end zone reinforcement.

  • Transmission by Bond
  • Transmission Length
  • Bond Stresses
  • Transverse Tensile Stresses
  • End Zone Reinforcement
  • 10. Prestressed Concrete Structures Multiple Choice Questions on Anchorage Zone Stresses in Post Tensioned Members

    The section contains Prestressed Concrete Structures multiple choice questions and answers on investigations, end block stress distribution, analysis by guyon, magnel, zielinski and rowe.

  • Investigations
  • Stress Distribution in End Block
  • Analysis by Guyon and Magnel
  • Analysis by Zielinski and Rowe
  • 11. Prestressed Concrete Structures MCQ on Limit State Design Criteria

    The section contains Prestressed Concrete Structures questions and answers on limit state design philosophy and criteria, design loads and strengths, members crack widths, serviceability limit states and dimensioning principles.

  • Philosophy of Limit State Design
  • Criteria for Limit States
  • Design Loads and Strengths
  • Serviceability Limit States
  • Crack Widths in Members
  • Principles of Dimensioning
  • 12. Multiple Choice Questions on Design of Prestressed Concrete Sections

    The section contains Prestressed Concrete Structures MCQs on flexure and axial tension design, compression, bending, shear and torsion designs.

  • Design for Flexure and Axial Tension
  • Design for Compression and Bending
  • Design for Shear and Torsion
  • 13. Prestressed Concrete Structures MCQ on Design of Pretensioned and Post-Tensioned Members

    The section contains Prestressed Concrete Structures multiple choice questions and answers on beams self weight estimation, partially prestressed members design, pretensioned and post tensioned beams design.

  • Estimation of Self Weight of Beams
  • Design of Pretensioned Beams
  • Design of Post Tensioned Beams
  • Design of Partially Prestressed Members
  • 14. Prestressed Concrete Structures Multiple Choice Questions on Composite Beams and Deflections

    The section contains Prestressed Concrete Structures questions and answers on composite structural members, composite members types and deflections, stresses analysis, serviceability limit, composite sections analysis, flexural and shear strength.

  • Composite Structural Members
  • Types of Composite Members
  • Analysis of Stresses
  • Deflections of Composite Members
  • Stresses at Serviceability Limit
  • Flexural and Shear Strength
  • Analysis of Composite Sections
  • 15. Prestressed Concrete Structures MCQ on Statically Indeterminate Structures

    The section contains Prestressed Concrete Structures MCQs on indeterminate structures effects and, achieving continuity and ultimate load analysis.

  • Effects of Indeterminate Structures
  • Analysis of Achieving Continuity
  • Ultimate Load Analysis
  • 16. Multiple Choice Questions on Prestressed Concrete Pipes, Slabs, Grid Floors, Tanks, Shell, Folded Structures, Poles and Sleepers

    The section contains Prestressed Concrete Structures multiple choice questions and answers on circular prestressing, prestressing of tanks, slabs, shell, folder structures, poles and sleepers.

  • Circular Prestressing
  • Prestressing of Tanks
  • Prestressing of Slabs and Floors
  • Prestressing of Shell and Folded Structures
  • Prestressing of Poles and Sleepers
  • 17. MCQ on Optimum Design of Prestressed Structures

    The section contains Prestressed Concrete Structures questions and answers on prestressed structures applications, optimisation principles, methods and techniques.

  • Principles of Optimisation
  • Methods of Optimisation
  • Optimisation Techniques
  • Application to Prestressed Structures
  • 18. Multiple Choice Questions on Prestressed Concrete Bridges & Trusses

    The section contains Prestressed Concrete Structures MCQs on prestressed concrete bridge decks, general features, stresses dimensions, material requirement, construction features and truss analysis.

  • Prestressed Concrete Bridge Decks
  • General Features
  • Dimension of Stresses
  • Material Requirement
  • Construction Features
  • Analysis of Truss
  • 19. MCQ on Planning and Economical Aspects of Prestressing

    The section contains Prestressed Concrete Structures multiple choice questions and answers on general aspects, structural forms for bridges, aircraft hangars, irrigation and energy structures.

  • Introduction and General Aspects
  • Structural Forms and High Rise Structures
  • Structural Form Bridges
  • Structural Forms for Aircraft Hangars
  • Structural Forms for Irrigation
  • Structural Forms for Energy Structures
  • 20. Multiple Choice Questions on Construction, Maintenance and Rehabilitation of Prestressed Structures

    The section contains Prestressed Concrete Structures questions and answers on construction techniques, structures maintenance and restoration, strengthening structures, case study on repairs and rehabilitation of structures.

  • Construction Techniques
  • Maintenance of Structures
  • Restoration of Strength of Structures
  • Strengthening Structures of Externally Bonded Plates
  • Case Study on Repairs and Rehabilitation of Structures
  • If you would like to learn "Prestressed Concrete Structures" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

    Wish you the best in your endeavor to learn and master Prestressed Concrete Structures!

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