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Mechanical Maintenance Engineer
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Aarti Industries Mechanical Maintenance Engineer Interview Questions and Answers

Updated 5 Feb 2024

Q1. Tell me about parameters you observed in clean room area.

Ans.

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 differentials are maintained to prevent the entry of outs...read more

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Q2. If i opened centrifugal pump tell?

Ans.

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 necessary, remove the pump's cover or casing using appropriate...read more

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Q3. How the vacuum created in steam ejector?

Ans.

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.

  • The vacuum created by the steam ejector is used for vario...read more

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Q4. What equipments are you handled?

Ans.

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

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Q5. Tell me mechanical seal types.

Ans.

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.

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Q6. 1 torr=? Mmof hg

Ans.

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.

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Ans.

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 a fluid in a system.

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