WorksheetsPSC U1
Total questions: 10
Worksheet time: 10mins
As per India standard code of practice for prestressed concrete (IS:1343-2012) the minimum grades of concrete to be used for post-tensioned and pre-tensioned structural elements are respectively
M20 for both
M40 and M30
M15 and M30
M30 and M40
The grade of concrete used for prestressed member lies in the range of
M20 to M30
M30 to M60
M70 to M100
M100 to M150
In prestressed concrete members, steel is under
Tension
Compression
Torsion
Bending
The purpose of reinforcement in prestressed concrete is
To provide adequate bond stress
To resist tensile stress
To impart initial compressive stress in concrete
All of these
The earliest examples of wooden barrel construction by force-fitting of metal bands and shrink-fitting of metal tires of wooden wheels indicate the art of
Pre tensioning
Post tensioning
Pre stressing
Jacking
The importance of using high strength concrete and high strength steel was introduced by
Euguen Freyssinet
Jackson
Dohring
Koenon
The structures of prestressed concrete are less liable to
Bending
Loading
Placing
Cracks
The chemical prestressing is also called as
Self stressing
Whole stressing
Half stressing
Model stressing
In pre-tensioning system
The member is cast first allowed by tensioning of high tensile wires
The member is prestressed by external anchors
The high-tensile wires are tensioned before placing concrete in forms
None of the above
In post-tensioning system
Wires are first tensioned followed by concreting
Tensioning of wires and concreting is simultaneously done
The wires are tensioned against hardened concrete
None of the above
