Prestressed Concrete (IS 1343) MCQ for GATE Civil Engineering

Regarding pile foundations, what is the minimum recommended drop height for the hammer?

When the height of an RCC wall matches its length, how much is its resistance enhanced?

An RCC roof slab is classified as a two-way slab when the ratio of its side lengths in the two perpendicular directions is:

The enlarged head of a column that supports a flat slab is technically known by what term in structural engineering?

Why are multiple reinforcing bars typically placed near the support of a simply supported beam?

According to structural analysis principles, what is the smallest acceptable diameter for longitudinal reinforcing bars in a column?

The bending moment capacity of an under-reinforced concrete section is calculated based on:

The thickness of the finishing layer (topping) in a ribbed slab typically ranges from:

A 3.6 m long RCC cantilever beam, 25 cm wide, with a lever arm of 40 cm, carries a 1200 kg load at its free end. Vertical stirrups can resist 1800 kg. Assuming concrete bears one-third of the diagonal tension and neglecting the beam's self-weight, calculate the required number of shear stirrups.

Considering creep coefficient (C), initial pre-stress (f), modular ratio (m), Young's modulus of steel (E), and shrinkage strain (e), what is the combined impact of creep and shrinkage on pre-stressed concrete?

The minimum required length for lap splices in tension reinforcement is mandated to be no less than the product of the bar diameter and (actual tension / four times the permissible average bond stress), provided this length exceeds:

While larger aggregate sizes generally enhance strength, their maximum permissible dimension should not exceed:

As per IS : 456-1978, what value should be adopted for the modulus of elasticity of steel?

For a simply supported slab with Fe500 steel and pt = 0.4%, check deflection adequacy for a 4 m span with 150 mm overall depth (d = 125 mm). Given: kt = 1.35 for this condition.

A column 300 x 450 mm has an unsupported length of 3.6 m. Both ends are fixed in a braced frame (k = 0.65). Check if the column is short or slender.

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.

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.

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.