Rustomjee Group Civil Site Supervisor Interview Questions and Answers

Reinforcement and rebar are steel bars used to reinforce concrete structures. They are commonly used in block work.

• Reinforcement and rebar are used to provide tensile strength to concrete structures.

• They are commonly used in block work to reinforce the walls and provide stability.

• Rebar is typically made of carbon steel and is available in various sizes and shapes.

• The size and spacing of the rebar depend on the design a...read more

The development length for M25 concrete and Fe 500 steel is determined based on various factors.

• Development length is the length of reinforcement required to transfer the stress between the concrete and steel.

• It depends on the bond strength between concrete and steel, concrete cover, and the diameter of the steel bar.

• For M25 concrete and Fe 500 steel, the development length can be calculated using empirical formulas or...read more

The minimum thickness of slab depends on various factors such as load, span, and type of slab.

• The minimum thickness of slab is generally 4 inches for residential buildings.

• For commercial buildings, the minimum thickness of slab is 6 inches.

• The thickness of slab also depends on the type of slab such as one-way or two-way slab.

• The thickness of slab also depends on the span of the slab and the load it will bear.

• The minimu...read more

The slab shuttering removal time depends on various factors such as concrete strength, weather conditions, and type of formwork used.

• The removal time can range from 3 days to 21 days depending on the above factors.

• For normal concrete with temperature above 20°C, the removal time is usually 7 days.

• For concrete with high early strength, the removal time can be reduced to 3 days.

• In cold weather conditions, the removal tim...read more

Mortars used for tiles bed are cement-based and are used to fix tiles to the substrate.

• Cement-based mortars are commonly used for tiles bed

• They are used to fix tiles to the substrate

• The mortar should be mixed with water to form a paste

• The paste is then applied to the substrate using a notched trowel

• Tiles are then placed onto the mortar and pressed firmly into place

• The mortar should be allowed to dry and set before grou