Vahanwire Interview Questions and Answers

The number of points in a PM checklist varies depending on the equipment being checked.

• PM checklists are specific to each piece of equipment.

• The number of points in a PM checklist can range from a few to hundreds.

• Points in a PM checklist can include tasks such as inspecting, cleaning, and lubricating equipment.

• The purpose of a PM checklist is to ensure that equipment is properly maintained and to prevent breakdowns.

• The number of points in a PM checklist can be adjusted based ...read more

A CNC machine can have 3, 4, or 5 axes depending on its configuration.

• The X, Y, and Z axes are common in 3-axis machines.

• 4-axis machines add a rotary axis, usually the A-axis.

• 5-axis machines add a second rotary axis, usually the B-axis.

• Some machines may have additional axes for specialized operations, such as milling machines with a tilting spindle head.

• The number of axes determines the machine's capabilities and the complexity of its programming.

Maintenance procedure involves regular inspection, cleaning, repair and replacement of equipment to ensure optimal performance and prevent breakdowns.

• Create a maintenance schedule based on manufacturer recommendations and equipment usage

• Perform regular inspections to identify potential issues before they become major problems

• Clean and lubricate equipment as needed to prevent wear and tear

• Repair or replace damaged or worn parts promptly to prevent further damage

• Document all ma...read more

Breakdown is an unexpected failure of equipment or machinery. KPI stands for Key Performance Indicator, a measurable value that indicates how well a company is achieving its goals.

• Breakdown can cause production delays and loss of revenue

• KPIs can be used to track maintenance performance and identify areas for improvement

• Examples of KPIs for maintenance include equipment uptime, mean time between failures, and maintenance cost per unit produced

Types of maintenance include corrective, preventive, predictive, and proactive maintenance.

• Corrective maintenance involves fixing a problem after it has occurred.

• Preventive maintenance involves regularly scheduled maintenance to prevent problems from occurring.

• Predictive maintenance involves using data and analytics to predict when maintenance is needed.

• Proactive maintenance involves identifying and addressing potential issues before they become problems.

• Examples include repl...read more

Machines need regular preventive maintenance (PM) to ensure optimal performance and longevity.

• Regular cleaning and lubrication

• Inspection and replacement of worn parts

• Calibration and adjustment of sensors and controls

• Testing and monitoring of performance

• Documentation of maintenance activities

• Training of operators and maintenance staff

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 system or equipment.

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

• MTTR is used to measure the efficiency of maintenance and repair processes.

• MTBF is used to measure the reliability of a system or equipment.

• MTBF = (total operating time - total downtime) / number of failures

• MTTR = total downtime / number of fai...read more

MTTR is the average time to repair a failed system while MTBF is the average time between failures.

• MTTR measures the maintainability of a system while MTBF measures its reliability.

• MTTR is calculated by dividing the total downtime by the number of failures while MTBF is calculated by dividing the total uptime by the number of failures.

• MTTR is usually shorter than MTBF as it only measures the time to repair a failed system while MTBF measures the time between failures.

• MTTR is ...read more