D69 MASTER THE DAY

What is the main function of a retaining wall?

• To hold back soil or fill material at different levels
• To provide ventilation
• To support roof structures
• To resist dynamic loads

Answer explanation

Retaining walls are designed to hold back soil or other materials at different levels, maintaining a difference in ground elevation.

Which IS code provides guidelines for retaining wall-specific design?

• IS 456
• IS 14458
• IS 1893
• IS 3370

Answer explanation

IS 14458 covers retaining wall-specific design and construction.

In a cantilever retaining wall, which part supports the earth?

• Toe
• Heel
• Stem
• Weep hole

Answer explanation

The stem is the upright part of the cantilever retaining wall that supports the earth.

What is the typical economical height range for cantilever retaining walls?

• 1 m to 3 m
• 3 m to 8 m
• 8 m to 15 m
• Above 15 m

Answer explanation

Cantilever retaining walls are economical for medium heights, typically 3 m to 8 m.

Counterfort retaining walls are most economical for which height range?

• Up to 3 m
• 3 m to 8 m
• 8 m to 15+ m
• Above 20 m

Answer explanation

Counterfort retaining walls are economical for taller walls, generally 8 m to 15+ m.

What is the function of a shear key in retaining walls?

• Increase passive resistance against sliding
• Reduce bending moment
• Increase wall height
• Provide ventilation

Answer explanation

Shear keys are provided to increase passive resistance significantly, helping resist sliding.

Which load is created by traffic, including braking and accelerating?

• Dead load
• Live load
• Dynamic load
• Wind load

Answer explanation

Dynamic loads occur in bridges and similar infrastructure, caused by traffic movements.

What is the primary load-carrying element in an RCC framed structure?

• Slab
• Column
• Beam
• Wall

Answer explanation

Columns are the primary load-carrying element in RCC framed structures.

What is a portal frame?

• A structure with beams, columns, and footings monolithic in design
• A wall made of RCC
• A beam supported by walls
• A type of cantilever wall

Answer explanation

A portal frame is a structure in which beam, column, and footing are monolithic in design and construction.

Which connection type has zero bending moment at the support?

• Fixed connection
• Hinged connection
• Rigid connection
• Moment connection

Answer explanation

In a hinged connection, bending moment at the support is zero as per theory of structures.