NCCCL Interview Questions, Process, and Tips

M20 grade is a mix of concrete that has a compressive strength of 20 megapascals (MPa).

• M20 grade is commonly used in construction for foundations, columns, and beams.

• It is made by mixing cement, sand, and coarse aggregates in a specific ratio.

• The ratio for M20 grade is 1:1.5:3, which means one part cement, 1.5 parts sand, and three parts coarse aggregates.

• The water-cement ratio for M20 grade should be around 0.5 to 0.6...read more

There are several types of testing for concrete, including compressive strength, slump, and air content.

• Compressive strength testing measures the ability of concrete to withstand pressure

• Slump testing measures the consistency and workability of concrete

• Air content testing measures the amount of air trapped in the concrete

• Other types of testing include water permeability, chloride permeability, and shrinkage testing

Site engineer is responsible for overseeing construction projects and ensuring they are completed safely, on time, and within budget.

• Supervising construction activities

• Ensuring compliance with safety regulations

• Managing project timelines and budgets

• Collaborating with architects and contractors

• Maintaining project documentation

• Resolving any issues that arise during construction

Soil testing on field involves various tests to determine soil properties and suitability for construction.

• Soil samples are collected from different depths and locations on the site

• Tests include moisture content, density, shear strength, and permeability

• Results are compared to industry standards and project requirements

• Testing helps determine foundation design and construction methods

• Field testing is important for ensu