Exam Details
| Subject | Prestressed Concrete | |
| Paper | ||
| Exam / Course | Diploma in Civil Engineering (DCLE - G) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
1. Choose the most appropriate answer from the given options.
Which of the following is appropriate for the manufacture of railway sleepers?
Pretensioning
Post tensioning
Either of or above
None or above
What is the type of strain in tendons in prestressed members
Tensile
Compressive
Shear
Bending
Loss of prestress may take place due to
Elastic shortening
Creep
Relaxation
All of the above
For characteristic load, the percentage probability of not being exceeded is
50%
75%
90%
95%
The concept of transmission length is applicable to
Pretensioned concrete
Post tensioned concrete
Both the above
None of the above
Due to the use of high-strength concrete in prestressed concrete members, cross-sectional dimensions of members
reduce
increase
are not subject to any change
may reduce or increase
The minimum grade of concrete, to be used in post tensioned concrete, is
M 30
M 40
M 50
M 60
Write a brief note on the various applications of prestressed concrete.
Explain why high-strength steel is needed in prestressed concrete components.
Enlist the names of any two types of devices used for stretching of tendons. Explain any one type briefly.
What is Hoyer's long line system of pretensioning? Explain briefly.
Discuss how conical wedges of Gifford-Udall system work.
Compare pre and post-tensioning in brief.
Draw a neat sketch of anyone type of tendon splice.
Write a short note on Thermo-electric prestressing.
What do you understand by 'stress corrosion' Explain briefly.
Explain 'hydrogen embrittlement' of tendons briefly.
A simply supported beam of span 6 m is subjected to a UDL whose total value is 256 kN. The UDL is applied on full span of the beam. It is subjected to a prestressing force of 1920 kN with the tendon eccentrically located at 200 mm above the bottom fibre. Sketch the distribution of stresses at the mid-span of the beam.
Discuss the concept of 'pressure line' briefly.
Which of the following is appropriate for the manufacture of railway sleepers?
Pretensioning
Post tensioning
Either of or above
None or above
What is the type of strain in tendons in prestressed members
Tensile
Compressive
Shear
Bending
Loss of prestress may take place due to
Elastic shortening
Creep
Relaxation
All of the above
For characteristic load, the percentage probability of not being exceeded is
50%
75%
90%
95%
The concept of transmission length is applicable to
Pretensioned concrete
Post tensioned concrete
Both the above
None of the above
Due to the use of high-strength concrete in prestressed concrete members, cross-sectional dimensions of members
reduce
increase
are not subject to any change
may reduce or increase
The minimum grade of concrete, to be used in post tensioned concrete, is
M 30
M 40
M 50
M 60
Write a brief note on the various applications of prestressed concrete.
Explain why high-strength steel is needed in prestressed concrete components.
Enlist the names of any two types of devices used for stretching of tendons. Explain any one type briefly.
What is Hoyer's long line system of pretensioning? Explain briefly.
Discuss how conical wedges of Gifford-Udall system work.
Compare pre and post-tensioning in brief.
Draw a neat sketch of anyone type of tendon splice.
Write a short note on Thermo-electric prestressing.
What do you understand by 'stress corrosion' Explain briefly.
Explain 'hydrogen embrittlement' of tendons briefly.
A simply supported beam of span 6 m is subjected to a UDL whose total value is 256 kN. The UDL is applied on full span of the beam. It is subjected to a prestressing force of 1920 kN with the tendon eccentrically located at 200 mm above the bottom fibre. Sketch the distribution of stresses at the mid-span of the beam.
Discuss the concept of 'pressure line' briefly.
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
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- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
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Subjects
- Construction Equipment
- Construction Management
- Construction Supervision and Building Maintenance
- Irrigation Engineering
- Prestressed Concrete
- Soil Mechanics and Foundation Engineering
- Technical Documentation
- Transportation Engineering