Prestressed Concrete (IS 1343) MCQ for GATE Civil Engineering

In an R.C.C. beam that lacks shear reinforcement, inclined cracks, roughly to the horizontal, tend to form in the bottom portion at an angle of approximately:

What is the approximate magnitude of the strain developed in concrete due to shrinkage in structural applications?

For stairs designed to span horizontally, the minimum thickness of the inclined slab (waist slab) is generally taken as:

A concrete mix with approximately 1% voids is estimated to experience a reduction in strength by what percentage?

Bending stresses in a wall or column subjected to effective vertical loads do not require explicit consideration if the eccentricity ratio is:

When a prestressed rectangular concrete beam is subjected to a uniformly distributed load, the optimal profile for the prestressing tendon is:

Which of the following conditions provide full structural restraint to a wall?

An R.C.C. column is classified as a short column if its slenderness ratio is below which threshold?

What is the minimum compressive resistance (in N/mm²) for H1 grade mortar used in masonry?

Given two mutually perpendicular principal stresses, p1 and p2, acting on a soil mass, the normal stress on a plane inclined at an angle θ to the plane of p1 is expressed by which formula?

For concrete intended for pre-tensioned and post-tensioned applications, respectively, what is the minimum specified cube strength?

To counteract a concentrated load 'W' at the midpoint of a span 'L' using a bent tendon with tension 'P', what is the minimum permissible central sag 'h' for the tendon?

A beam 230 x 500 mm (d = 450 mm) with 3 nos 16 mm Fe500 bars in M25 concrete has Vu = 80 kN at d from support face. Determine the required stirrup spacing using 2-legged 8 mm Fe500 stirrups.

The distribution pattern of shear stress intensity across the cross-section of a rectangular beam is characterized by:

For a reinforced concrete structural element subjected to axial compression, what is the approximate allowable compressive stress?

A beam-column joint in Zone IV has beams framing into only 3 faces. The column is 300 x 450 mm. As per IS 13920:2016, what is the maximum hoop spacing in the joint region, and what is the required Ash for the confining reinforcement using 8 mm hoops at the governing spacing?

A seismic beam (300 x 600 mm, d = 560 mm) in Zone IV has top steel = 4-20 mm and bottom steel = 3-20 mm at the face of a column. Check if IS 13920 Clause 6.2 requirements for positive-to-negative steel ratio are satisfied.

Design a complete beam section: A simply supported beam 300 x 700 mm (d = 650 mm, d' = 50 mm) spans 7 m in a Zone IV building. M25, Fe500. Factored loads: Mu = 380 kN-m, Vu = 180 kN at d from support. Determine: (i) whether singly/doubly reinforced, (ii) Ast required, (iii) stirrup spacing in the plastic hinge zone per IS 13920, and (iv) check shear adequacy.

A beam section 300 x 650 mm (d = 600 mm, d' = 50 mm) with M25 and Fe500 is subjected to Mu = 400 kN-m. Calculate: (i) Mu,lim, (ii) whether doubly reinforced is needed, and (iii) if yes, the compression steel Asc required.