J S Enterprises Interview Questions and Answers

Preventive maintenance involves regular inspections, cleaning, lubrication, and replacement of parts to ensure equipment reliability.

• Create a maintenance schedule based on manufacturer recommendations

• Perform regular inspections to identify any signs of wear or damage

• Clean equipment regularly to remove dirt, dust, and debris

• Lubricate moving parts to reduce friction and prevent excessive wear

• Replace worn or damaged parts before they cause equipment failure

• Keep records of mainte...read more

Mechanical seals are used to prevent leakage of fluids in rotating equipment such as pumps and compressors.

• Mechanical seals are used to prevent leakage of fluids in rotating equipment

• They consist of two main components - a stationary part and a rotating part

• The stationary part is fixed to the pump or compressor housing, while the rotating part is attached to the shaft

• The two parts are held together by a spring and a set of secondary seals

• The primary seal is made of a hard mat...read more

Lubrication is essential for equipment and instrument maintenance. The type of lubricant used depends on the equipment and its operating conditions.

• Lubrication reduces friction and wear on moving parts

• Different types of lubricants include oil, grease, and dry lubricants

• The type of lubricant used depends on the equipment's operating conditions, such as temperature and pressure

• Over-lubrication can be just as harmful as under-lubrication

• Regular lubrication maintenance is necessa...read more

Alignment of rotator equipment and pump, motor is crucial for efficient operation and preventing damage.

• Use precision measuring tools like dial indicators and laser alignment systems

• Ensure proper baseplate installation and leveling

• Check for soft foot and correct it if present

• Follow manufacturer's specifications and tolerances

• Perform alignment checks regularly to prevent wear and tear

• Examples: aligning a centrifugal pump with a motor, aligning a gearbox with a compressor

Bearings are used to reduce friction between two moving parts. There are different types of bearings for different applications.

• Bearings reduce friction and wear between two moving parts

• They support radial and axial loads

• Types of bearings include ball bearings, roller bearings, and plain bearings

• Ball bearings are used in high-speed applications

• Roller bearings are used in heavy-duty applications

• Plain bearings are used in low-speed and high-load applications

Measuring systems in mechanical engineering are used to accurately measure physical quantities such as length, force, pressure, and temperature.

• Measuring systems can be analog or digital.

• Analog measuring systems use a scale and pointer to indicate the measured value.

• Digital measuring systems use electronic sensors to convert physical quantities into digital signals.

• Common types of measuring systems include micrometers, calipers, pressure gauges, and thermometers.

• Measuring sys...read more