PI Industries Assistant Manager Maintenance Interview Questions and Answers

I have handled a wide range of equipment in my role as a Mechanical Maintenance Engineer.

• Pumps and compressors

• Conveyors and material handling equipment

• Boilers and heat exchangers

• HVAC systems

• Generators and power distribution systems

• Machine tools and production equipment

• Hydraulic and pneumatic systems

• Crane and lifting equipment

• Instrumentation and control systems

When opening a centrifugal pump, it is important to follow proper procedures to ensure safety and prevent damage.

• Before opening the pump, ensure that it is isolated from the power source and all pressure has been relieved.

• Inspect the pump for any signs of damage or wear, such as leaks, cracks, or excessive vibration.

• Check the pump's impeller and casing for any debris or blockages that may affect its performance.

• If nece...read more

Vacuum is created in a steam ejector through the principle of jet propulsion.

• Steam ejectors use high-pressure steam to create a low-pressure environment.

• The steam enters the nozzle of the ejector and expands, creating a high-velocity jet.

• This high-velocity jet entrains and compresses the surrounding gas or vapor, reducing its pressure.

• The entrained gas or vapor is then discharged through the diffuser, creating a vacuum...read more

1 torr is equal to 0.03937 mm of Hg.

• 1 torr is a unit of pressure equal to 1/760th of standard atmospheric pressure.

• mm of Hg is a unit of pressure commonly used in vacuum systems.

• To convert torr to mm of Hg, multiply by 0.03937.

• Example: 1 torr = 1 * 0.03937 mm of Hg = 0.03937 mm of Hg.

759 mm of hg is a unit of pressure measurement.

• mm of hg is a common unit used to measure pressure.

• 759 mm of hg is equivalent to 1012.8 millibars or 14.1 pounds per square inch (psi).

• It is often used in meteorology to measure atmospheric pressure.

• In mechanical maintenance, it can be used to monitor pressure in systems or equipment.

• For example, if a pressure gauge reads 759 mm of hg, it indicates the pressure exerted by

In a clean room area, parameters observed include air quality, temperature, humidity, particle count, and pressure differentials.

• Air quality is monitored to ensure low levels of contaminants.

• Temperature is controlled to maintain a stable environment for sensitive equipment.

• Humidity levels are regulated to prevent moisture-related issues.

• Particle count is measured to ensure cleanliness and prevent contamination.

• Pressure...read more

Mechanical seal types include cartridge seals, component seals, and bellows seals.

• Cartridge seals are pre-assembled units that are easy to install and replace.

• Component seals are made up of separate rotating and stationary parts.

• Bellows seals use a flexible metal bellows to provide a dynamic seal.