SKH Group Senior Engineer- Maintenance Interview Questions, Process, and Tips

PLCs have various types of inputs and outputs for communication and control.

• PLCs have digital inputs and outputs for binary signals.

• Analog inputs and outputs are used for continuous signals.

• Specialized inputs and outputs include high-speed counters, pulse outputs, and communication modules.

• Examples of PLC input devices are push buttons, limit switches, and sensors.

• Examples of PLC output devices are motors, solenoids, a

SAP T-codes are transaction codes used in SAP systems to execute specific functions.

• T-code SM01 is used to lock/unlock transactions

• T-code SE11 is used to create or modify database tables

• T-code MM01 is used to create a material master record

• T-code VA01 is used to create a sales order

• T-code FBL3N is used to display GL account line items

Why analysis of problems is important in maintenance engineering?

• Identifies root cause of problems

• Helps in developing effective solutions

• Reduces downtime and maintenance costs

• Improves equipment reliability and performance

• Enables proactive maintenance approach

• Examples: Failure mode and effects analysis (FMEA), Root cause analysis (RCA), Fishbone diagram

A power pack is a device that converts mechanical energy into electrical energy. Its main components include an engine, generator, and control system.

• Power pack converts mechanical energy into electrical energy

• Main components include engine, generator, and control system

• Engine provides mechanical energy to generator

• Generator converts mechanical energy into electrical energy

• Control system regulates the power output

Valves are devices used to control the flow of fluids or gases. There are several types of valves used in various industries.

• Gate valve

• Ball valve

• Butterfly valve

• Globe valve

• Check valve

• Diaphragm valve

• Needle valve

• Pressure relief valve

Parallelism and perpendicularity are crucial in press machines for accurate and consistent production.

• Parallelism ensures that the ram and bed of the press machine move in a straight line, preventing any deviation in the production process.

• Perpendicularity ensures that the ram and bed of the press machine move at a right angle to each other, preventing any twisting or bending of the material being pressed.

• Any deviation...read more

Press machines use hydraulic or mechanical force to shape or cut materials.

• Press machines use a ram or piston to apply force to a material.

• Hydraulic press machines use fluid pressure to generate force.

• Mechanical press machines use a flywheel or motor to generate force.

• Press machines can be used for stamping, forging, punching, and more.

• Safety precautions must be taken when operating press machines to prevent accidents.

5S is a methodology for workplace organization and efficiency. There are 5 types of S's that are used in this methodology.

• Sort - removing unnecessary items from the workplace

• Set in order - organizing the remaining items in a logical manner

• Shine - cleaning and maintaining the workplace

• Standardize - creating standard procedures for maintaining the workplace

• Sustain - ensuring that the 5S methodology is continuously implem

PLC program for automatic water tank fill up with indicators

• Define input sensors for water level and output actuators for water fill valve

• Create ladder logic to control the fill valve based on water level sensors

• Add indicators to display water level and fill status

• Test and debug the program to ensure proper functionality

Sensors are devices that detect and respond to physical stimuli.

• There are various types of sensors such as temperature sensors, pressure sensors, proximity sensors, motion sensors, etc.

• Some examples of sensors commonly used in maintenance include vibration sensors, acoustic sensors, and thermal imaging sensors.

• Sensors can be used to monitor equipment performance, detect faults, and predict maintenance needs.

• Advancement...read more

MTBF and MTTR are two important metrics used in maintenance engineering.

• MTBF stands for Mean Time Between Failures and is a measure of reliability.

• MTTR stands for Mean Time To Repair and is a measure of maintainability.

• MTBF = Total uptime / Number of failures

• MTTR = Total downtime / Number of repairs

• MTBF and MTTR are used to evaluate and improve maintenance processes.