Oil India Mechanical Maintenance Technician Interview Questions and Answers for Freshers

Mechanical seal assembly is a device used to seal the gap between two mechanical parts to prevent leakage.

• It is used to prevent leakage between two mechanical parts

• It consists of two main parts: stationary and rotating

• The stationary part is fixed to the housing while the rotating part is attached to the shaft

• The two parts are held together by springs or other means

• Common applications include pumps, compressors, and mix

Part off seal is a process of removing a part from a larger component without damaging it.

• Part off seal is commonly used in mechanical maintenance to replace worn out parts.

• It involves cutting or breaking the part off from the larger component using specialized tools.

• The process requires precision and care to avoid damaging the surrounding components.

• Examples of parts that may be removed using part off seal include bea

RS 485 is a multi-point communication standard while RS 232 is a point-to-point communication standard.

• RS 485 supports up to 32 devices on a single bus while RS 232 only supports two devices.

• RS 485 uses differential signaling for noise immunity while RS 232 uses single-ended signaling.

• RS 485 can transmit data over longer distances than RS 232.

• RS 485 is commonly used in industrial automation and control systems while RS

Protocol is a set of rules and guidelines that govern the communication between devices or systems.

• Protocols ensure that devices or systems can communicate with each other effectively and efficiently.

• They define the format, timing, sequencing, and error checking of messages exchanged between devices or systems.

• Examples of protocols include TCP/IP, HTTP, FTP, and SMTP.

• Protocols can be implemented in hardware, software, ...read more

PLC stands for Programmable Logic Controller. It is a digital computer used for automation of electromechanical processes.

• PLC is used in industrial automation to control machinery and processes.

• It is programmed using ladder logic or other programming languages.

• PLC can be used in various applications such as manufacturing, transportation, and energy.

• Examples of PLC brands include Siemens, Allen-Bradley, and Mitsubishi.

• P...read more

There are several types of PLCs, including modular, compact, rack-mounted, and software-based PLCs.

• Modular PLCs are designed to be expandable and customizable.

• Compact PLCs are smaller and more cost-effective than modular PLCs.

• Rack-mounted PLCs are designed to be mounted in a standard equipment rack.

• Software-based PLCs run on a computer and use specialized software to emulate a physical PLC.

• Other types of PLCs include s...read more

There are two types of maintenance for induction motors: preventive and corrective.

• Preventive maintenance involves regular inspections, cleaning, lubrication, and replacement of worn parts to prevent breakdowns.

• Corrective maintenance involves repairing or replacing parts after a breakdown has occurred.

• Preventive maintenance is more cost-effective in the long run and helps to extend the life of the motor.

• Examples of pre...read more