A post tensioned cable of beam 10m long is initially tensioned to a stress of 1000n/mm2 at one end, slope is 1 in 24 tendons curved at each end , area is 600mm2, Es is 210kn/mm2, coefficient of friction between duct and cable is 0.55, friction coefficient for wave effect is 0.0015perm. During anchorage, if there is a slip 3mm at the jacking end, calculate final force?

A post tensioned cable of beam 10m long is initially tensioned to a stress of 1000n/mm2 at one end, slope is 1 in 24 tendons curved at each end , area is 600mm2, Es is 210kn/mm2, coefficient of friction between duct and cable is 0.55, friction coefficient for wave effect is 0.0015perm. During anchorage, if there is a slip 3mm at the jacking end, calculate final force? Correct Answer 37.8kn

Total change of slope from end to end α = (2×1/24) = (1/12), μα = (0.55×1/12) = 0.046, kx = (0.0015×10) = 0.015, P˳(μα+kx) = 1000(0.046+0.015) = 61n/mm2, Slip at the jacking end = 3 = (PL/AE) P = (3×210×103×600/10×1000) = 37800kn = 37.8kn.
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Directions : Following question consists of a statement followed by three arguments I, II and III . You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument.

Statement : Should all the students graduating in any discipline desirous of pursuing post-graduation of the subjects of their choice be allowed to enrol in the post-graduate courses?

Arguments :
I. Yes. The students are the best judge of their capabilities and there should not be restrictions for joining post-graduate courses.
II. No. The students need to study relevant subjects in graduate courses to enrol in post-graduate courses and the students must fulfil such conditions.
III. No. There are not enough institutes offering post-graduate courses which can accommodate all the graduates desirous of seeking post-graduate education of their own choice.
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S. The true stress-true strain curve in tension and compression are identical.