Polytechnic College Interview Questions and Answers

RCC beam sections can be rectangular, T-shaped, L-shaped, inverted L-shaped, and circular.

• Rectangular section is the most commonly used.

• T-shaped section is used for longer spans and heavy loads.

• L-shaped and inverted L-shaped sections are used for shorter spans and lighter loads.

• Circular section is used for aesthetic purposes.

Under reinforced, over reinforced and balance section are terms used in reinforced concrete design.

• Under reinforced section: Tension failure occurs before compression failure.

• Over reinforced section: Compression failure occurs before tension failure.

• Balance section: Tension and compression failures occur simultaneously.

• Under reinforced sections are ductile and preferred for earthquake-resistant structures.

• Over reinforc...read more

The standard size of a door and window varies depending on the country and building codes.

• In the US, the standard door size is 80 inches by 36 inches.

• In Europe, the standard door size is 2040mm by 826mm.

• The standard window size also varies, but a common size in the US is 24 inches by 36 inches.

• Window sizes can also be customized based on the needs of the building and the preferences of the owner.

Stress-strain curve for mild steel shows the relationship between stress and strain during deformation.

• The curve has three distinct regions: elastic, plastic, and necking.

• In the elastic region, the material deforms elastically and returns to its original shape when the stress is removed.

• In the plastic region, the material deforms plastically and does not return to its original shape when the stress is removed.

• The necki...read more