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G-19 RCC & Prestress Revision Quiz 2 (App update required to attempt this test)

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Question 1

Let the characteristic strength be defined as that value, below which not more than 50% of the results are expected to fall. Assuming a standard deviation of 4 MPa, the target mean strength (in MPa) to be considered in the mix design of a M25 concrete would be

Question 2

A cantilever beam of width 450 mm and effective depth 600 mm is laterally restrained at a distance L from the free end. The maximum value of 'L' to ensure proper lateral stability is ________m.

Question 3

A singly reinforced rectangular beam has a width of 160 mm and an effective depth of 320 mm. The characteristic compressive strength of concrete is 20 MPa and the tensile strength of steel is 250 MPa. The area of steel (in mm²) in tension is [Balanced section]

Question 4

A concrete beam is post-tensioned by a cable carrying an initial stress of 1000 N/mm². The slip at the jacking end was observed to be 6 mm. The modulus of elasticity of steel is 210 kN/mm². The percentage loss of stress due to anchorage slip, if the length of beam is 30 m, is ______%.

Question 5

What is the net downward load to be considered for analysis of the prestressed concrete beam provided with a linear cable is shown in fig. bellow

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ESE & GATE CE Design of Concrete Structures

Oct 13ESE & GATE CE