DOOSAN Interview Questions and Answers

Explaining safety zone, multi-stage centrifugal pump parts, and the use of wear ring in pump.

• Safety zone is the area around a machine where it is unsafe for personnel to be present during operation.

• Multi-stage centrifugal pump parts include impellers, diffusers, and wear rings.

• Wear rings are used to reduce the clearance between the impeller and the pump casing, which improves efficiency and reduces vibration.

• Wear rings...read more

Motors and transformers are protected by various methods such as fuses, circuit breakers, overload relays, and thermal protectors.

• Fuses are used to protect against short circuits and overloads.

• Circuit breakers are used to protect against overloads and faults.

• Overload relays are used to protect against overloads.

• Thermal protectors are used to protect against overheating.

• Transformers are also protected by surge arresters...read more

PM activities on motors and transformers involve regular inspection, testing, and maintenance to ensure optimal performance and prevent breakdowns.

• Inspect motor and transformer components for signs of wear and tear

• Test insulation resistance and perform oil analysis on transformers

• Clean and lubricate moving parts

• Tighten loose connections and replace faulty components

• Schedule regular maintenance based on manufacturer rec...read more

Name plate details of motors and transformers include information such as voltage, current, power rating, frequency, and efficiency.

• Name plate details are important for proper maintenance and troubleshooting of electrical equipment.

• Motor name plates typically include information such as horsepower, voltage, current, speed, and efficiency.

• Transformer name plates typically include information such as kVA rating, primary ...read more