Sigma Freudenberg NOK Utility Maintenance Technician Interview Questions and Answers

The mechanism in a hydraulic press is the system of components that allows for the transmission of force through a fluid to generate a large amount of pressure.

• Hydraulic press uses a hydraulic cylinder to generate force.

• The force is transmitted through a fluid, typically oil or water.

• The mechanism includes valves, pumps, and pistons to control the flow of the fluid and generate pressure.

• The pressure created by the mech...read more

Forging is a manufacturing process involving the shaping of metal using localized compressive forces.

• Heating the metal to a high temperature to make it more malleable

• Applying compressive forces to shape the metal into the desired form

• Cooling the forged metal to strengthen it

• Types of forging include open-die forging, closed-die forging, and seamless rolled ring forging

PM stands for Preventive Maintenance, Breakdown Maintenance is fixing equipment after it fails, Productive Maintenance is improving equipment to increase productivity.

• Preventive Maintenance (PM) involves regularly scheduled maintenance to prevent equipment failure.

• Breakdown Maintenance involves fixing equipment after it has failed.

• Productive Maintenance involves improving equipment to increase productivity and reduce d...read more

MTTR stands for Mean Time To Repair and MTBF stands for Mean Time Between Failures.

• MTTR is the average time taken to repair a failed equipment or system.

• MTBF is the average time between two consecutive failures of a system or equipment.

• MTTR and MTBF are important metrics used in maintenance engineering to measure the reliability and maintainability of equipment.

• MTTR and MTBF can be used to identify areas for improvemen...read more

Friction is the resistance encountered when two surfaces slide against each other, affecting motion and energy efficiency.

• Friction can be static (preventing motion) or kinetic (resisting motion).

• Static friction is what keeps an object at rest until a certain force is applied.

• Kinetic friction occurs when two surfaces are sliding against each other, like a sled on snow.

• Friction is influenced by the materials in contact; ...read more

Diagnosing and resolving machine breakdowns involves systematic troubleshooting and effective communication.

• Identify the symptoms: Check for unusual noises, vibrations, or error codes.

• Gather information: Consult machine logs and maintenance records for previous issues.

• Isolate the problem: Use diagnostic tools to pinpoint the faulty component, such as a multimeter for electrical issues.

• Implement a solution: Replace or r...read more

Pneumatic circuits use compressed air for power, while hydraulic circuits use pressurized liquids for force transmission.

• Pneumatic circuits are commonly used in automation systems, like conveyor belts.

• Hydraulic circuits are often found in heavy machinery, such as excavators.

• Pneumatics are generally faster and cleaner, while hydraulics provide more force.

• Examples of pneumatic tools include air drills and impact wrenches...read more