NPCC Engineering Structural Engineer Interview Questions and Answers

Conveyors are used in materials handling to efficiently transport goods or materials from one place to another.

• Conveyors help in automating the transportation process, increasing efficiency and reducing manual labor.

• They can handle a wide range of materials, from small parts to heavy items.

• Conveyors can be customized to fit specific needs, such as incline or decline conveyors for elevation changes.

• Examples of conveyors...read more

Preventive maintenance is the practice of regularly inspecting, servicing, and replacing parts to prevent equipment failure.

• Regularly scheduled inspections and maintenance tasks are performed to prevent breakdowns

• Replacement of worn out parts before they fail to avoid costly repairs

• Helps in increasing the lifespan of equipment and reducing downtime

• Examples include changing oil in a car engine, cleaning air filters in H

Belt length can be calculated using the formula: L = 2C + (πD)

• Measure the distance around the pulleys (C)

• Measure the diameter of the larger pulley (D)

• Use the formula L = 2C + (πD) to calculate the belt length

• For example, if C = 30 inches and D = 10 inches, then L = 2(30) + (3.14)(10) = 60 + 31.4 = 91.4 inches

Types of pulleys commonly used in conveyors include drive pulleys, idler pulleys, and snub pulleys.

• Drive pulleys are used to transmit power from the motor to the conveyor belt.

• Idler pulleys are used to support and guide the conveyor belt.

• Snub pulleys are used to increase the angle of wrap around the drive pulley to improve traction.

• Other types of pulleys may include bend pulleys, take-up pulleys, and wing pulleys.

• Diffe...read more

Various types of joints used in engineering include welded joints, bolted joints, riveted joints, and adhesive joints.

• Welded joints involve fusing two materials together using heat or pressure.

• Bolted joints use bolts and nuts to secure two materials together.

• Riveted joints involve using rivets to connect two materials.

• Adhesive joints use adhesives to bond materials together.

PSL 2 has stricter requirements than PSL 1. Gas pipelines use PSL 2 pipes.

• PSL 2 has higher minimum yield strength and stricter chemical composition requirements than PSL 1

• PSL 2 also has non-destructive inspection requirements

• Gas pipelines use PSL 2 pipes due to their higher strength and durability

• PSL 1 pipes are typically used for low-pressure applications