Larsen & Toubro Limited Diploma Civil Engineer Interview Questions and Answers for Experienced

Grades of concrete are classifications based on the strength of the concrete mix.

• Concrete grades are denoted by M followed by a number, such as M20, M30, etc.

• The number after M represents the compressive strength of concrete in N/mm^2 after 28 days of curing.

• Higher grade concrete mixes have higher compressive strength.

• Common grades include M20, M25, M30, M35, M40, M45, M50, etc.

There are various types of permits in civil engineering work, including building permits, environmental permits, and excavation permits.

• Building permits are required for construction projects to ensure compliance with building codes and regulations.

• Environmental permits are needed for projects that may impact the environment, such as wetland construction or pollution control.

• Excavation permits are necessary for digging...read more