Rapid Metro Rail Gurgaon B Tech Civil Engineer Interview Questions and Answers

Concrete is checked at site through various methods to ensure its quality and strength.

• Visual inspection of concrete surface

• Slump test to check consistency

• Compression test to check strength

• Ultrasonic testing to detect defects

• Core testing to check strength and uniformity

• Rebound hammer test to check surface hardness

• Temperature monitoring during curing process

• Checking for proper mix proportions and curing conditions

• Verifi...read more

Free fall in concrete refers to the process of pouring concrete without any external force to assist in its placement.

• Free fall is a method of placing concrete where it is allowed to fall from the mixer truck or pump without any external force.

• This method is used for small jobs or in areas where access is limited.

• It can result in segregation and air pockets in the concrete if not properly managed.

• Free fall height shoul...read more

Grade of concrete refers to the strength of the concrete mix.

• Grade of concrete is denoted by the ratio of cement, sand, and aggregate used in the mix.

• The strength of concrete increases with the increase in the grade of concrete.

• For example, M20 grade of concrete means the mix contains 1 part cement, 1.5 parts sand, and 3 parts aggregate.

• Higher grade of concrete is used for structures that require higher strength, such

Select fill material is a type of soil used to fill in areas where the ground needs to be raised or leveled.

• Select fill material is typically composed of clay, sand, and gravel.

• It is used in construction projects to create a stable base for buildings, roads, and other structures.

• The material is carefully selected and tested to ensure it meets specific engineering requirements.

• Examples of select fill material include cr...read more

Embedded length is the length of a reinforcing bar that is embedded in concrete.

• It is the length of a reinforcing bar that is embedded in concrete

• It is used to provide anchorage to the reinforcement in the concrete

• The length is determined by the diameter of the bar and the strength of the concrete

• It is important to ensure that the embedded length is sufficient to prevent failure of the structure