DAR Engineering Interview Questions, Process, and Tips

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

Safety in design refers to the process of incorporating safety measures and considerations into the design of a structure or system.

• Safety in design involves identifying potential hazards and risks and implementing measures to mitigate them.

• It includes considering factors such as fire safety, structural integrity, accessibility, and emergency evacuation.

• Designing with safety in mind can prevent accidents, injuries, and...read more

Power factor is the ratio of real power to apparent power in an AC circuit.

• Power factor is a measure of how efficiently electrical power is being used.

• It is expressed as a decimal or a percentage.

• A power factor of 1 means all the power is being used efficiently.

• A power factor less than 1 means some power is being wasted.

• Inductive loads like motors have a lagging power factor while capacitive loads like transformers hav

Types of motors: AC motors, DC motors, stepper motors. Types of switchgear protection: fuses, circuit breakers, relays.

• AC motors: used in high power applications, such as industrial machinery and air conditioning systems

• DC motors: used in low power applications, such as toys and small appliances

• Stepper motors: used in precision applications, such as robotics and 3D printers

• Fuses: protect electrical circuits from overlo...read more

I have handled testing of various electrical equipment including transformers, switchgears, motors, generators, and control panels.

• Testing of transformers for insulation resistance, winding resistance, turns ratio, and polarity

• Testing of switchgears for insulation resistance, contact resistance, and operation

• Testing of motors for insulation resistance, winding resistance, and no-load and load testing

• Testing of generato...read more