APL Apollo Tubes Senior Engineer Interview Questions and Answers

The door of a cokr oven is typically made from heat-resistant materials such as refractory bricks or ceramic fiber.

• Refractory bricks

• Ceramic fiber

The mechanism for quenching car cage tilting is typically achieved through the use of hydraulic systems.

• Hydraulic systems are commonly used in industrial applications to control the movement of heavy machinery.

• The hydraulic system applies pressure to a piston, which in turn controls the tilting of the car cage.

• The quenching process involves rapidly cooling a material to achieve specific properties, often used in heat t...read more

Pressure relief valve releases excess pressure to prevent damage, while pressure reducing valve reduces pressure to a desired level.

• Pressure relief valve is used to protect equipment from overpressure by releasing excess pressure to the atmosphere.

• Pressure reducing valve is used to reduce the pressure of a fluid to a desired level in a system.

• Pressure relief valves are typically found in systems where pressure buildup ...read more

Hydraulic piston pumps offer higher efficiency, variable flow rates, and better control compared to fixed displacement vane pumps.

• Hydraulic piston pumps have higher efficiency due to their ability to vary flow rates based on demand, reducing energy consumption.

• Piston pumps provide better control over fluid flow and pressure, making them suitable for applications requiring precise operation.

• Piston pumps are more durable...read more

Preventive maintenance is scheduled maintenance to prevent breakdowns while predictive maintenance uses data to predict failures.

• Preventive maintenance involves regularly scheduled maintenance to prevent equipment breakdowns and prolong the lifespan of equipment.

• Predictive maintenance uses data analysis to predict when equipment failure is likely to occur, allowing for maintenance to be scheduled before a breakdown occ...read more

PLC stands for Programmable Logic Controller and HMI stands for Human Machine Interface.

• PLC is a digital computer used for automation of electromechanical processes.

• It is used to control machinery on factory assembly lines, amusement rides, or light fixtures.

• HMI is a graphical interface that allows humans to interact with machines.

• It provides a visual representation of the process being controlled by the PLC.

• Examples o...read more

Power factor can be managed by using capacitors, improving equipment efficiency, and reducing reactive power.

• Install capacitors to offset reactive power and improve power factor

• Upgrade equipment to more efficient models

• Reduce the amount of reactive power by optimizing operations

• Implement power factor correction techniques

• Regularly monitor and maintain power factor levels

Proxy is an intermediary server that acts as a gateway between clients and servers. SMPS is a power supply unit that converts AC to DC. Encoder is a device that converts motion into digital signals. Star delta is a method of starting three-phase motors.

• Proxy helps in hiding the identity of clients and servers.

• SMPS is commonly used in computers and other electronic devices.

• Encoders are used in robotics, automation, and ...read more