Mechanical Maintenance Officer Interview Questions and Answers

Various equipments handled, permissible leakage, oil used for vacuum pumps and reactor gear box, cooling tower water temperature, brine temperature

• Equipments handled include reactors, vacuum pumps, gear boxes

• Permissible leakage for reactor is typically around 1-2 liters for 15 minutes

• Toshniwal vacuum pumps use oil such as mineral oil or synthetic oil

• Reactor gear box may use gear oil or lubricating oil

• Cooling tower water temperature is usually maintained around 25-30 degrees C...read more

Alignment of pump coupling is done by using alignment tools and techniques to ensure proper alignment of the pump shaft and motor shaft.

• Use alignment tools such as dial indicators, laser alignment tools, or straight edges.

• Check and adjust the parallel and angular alignment between the pump shaft and motor shaft.

• Ensure that the coupling hubs are properly aligned and tightened to the shafts.

• Perform alignment checks after installation and periodically during maintenance.

• Proper a...read more

Boiler is used to generate steam while thermopack uses thermal energy to heat a fluid.

• Boiler produces high-pressure steam while thermopack heats a fluid at low pressure.

• Boiler is used in power plants and industrial processes while thermopack is used in small-scale industries.

• Boiler requires more maintenance and has a higher risk of explosion compared to thermopack.

• Boiler uses water as a working fluid while thermopack uses oil or other fluids.

• Boiler has a higher efficiency in ...read more

The maximum possible vacuum is determined by the pressure limit of the vacuum pump and the vapor pressure of the fluid being evacuated.

• The maximum vacuum achievable is limited by the pressure limit of the vacuum pump.

• The vapor pressure of the fluid being evacuated also limits the maximum vacuum.

• Vacuum levels are typically measured in torr or millibar units.

• The highest vacuum ever achieved in a laboratory is around 10^-13 torr.

• Vacuum technology is used in a variety of industri...read more