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Gkb Hi-tech Lenses Interview Questions and Answers

Updated 20 Apr 2024

Q1. How to calculate blowdown of cooling tower? What are the maintenance practice followed in maintenance efficiency of cooling tower? How to calculate capacity of cooling tower?

Ans.

Blowdown of cooling tower can be calculated using cycles of concentration. Maintenance practices include regular cleaning, inspection, and water treatment. Cooling tower capacity can be calculated based on heat load and design parameters.

  • Calculate blowdown using cycles of concentration formula: Blowdown = Evaporation Loss / (Cycles of Concentration - 1)

  • Maintenance practices include regular cleaning of cooling tower fill, drift eliminators, and basin, inspection of mechanical ...read more

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Q2. Explain completed details of Errection & Comissining of Pneumatic Compressor?

Ans.

Erection and commissioning of a pneumatic compressor involves assembling the components, connecting the necessary piping, testing for functionality, and fine-tuning for optimal performance.

  • Assemble the components of the pneumatic compressor according to the manufacturer's instructions.

  • Connect the necessary piping for air intake, compression, and output.

  • Test the compressor for functionality by running it empty and checking for any leaks or abnormal noises.

  • Fine-tune the compres...read more

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Q3. Explain the working principle of Air compressor ?

Ans.

Air compressor works by compressing air to increase its pressure and decrease its volume.

  • Air is drawn into the compressor through an intake valve.

  • The air is then compressed using a piston or rotating impeller.

  • Compressed air is stored in a tank or released directly for use.

  • Examples of air compressors include reciprocating, rotary screw, and centrifugal compressors.

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Q4. Safety during confined space?

Ans.

Safety during confined space is crucial to prevent accidents and ensure the well-being of workers.

  • Proper training and education on confined space hazards

  • Use of personal protective equipment (PPE) such as respirators, harnesses, and gas detectors

  • Implementing a permit system to control access and monitor activities

  • Continuous monitoring of atmospheric conditions

  • Establishing emergency procedures and rescue plans

  • Regular equipment inspection and maintenance

  • Effective communication a...read more

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Q5. Classify pumps on the basis of casings ?

Ans.

Pumps can be classified based on their casings as follows: volute casing, axial split casing, and radial split casing.

  • Volute casing pumps have a spiral-shaped casing that gradually expands to the discharge outlet.

  • Axial split casing pumps have a casing split along the horizontal centerline of the pump.

  • Radial split casing pumps have a casing split along the vertical centerline of the pump.

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Q6. Explain RCM in detail ?

Ans.

RCM stands for Reliability Centered Maintenance, a proactive maintenance strategy focused on identifying and preventing equipment failures.

  • RCM is a systematic approach to maintenance planning that aims to optimize maintenance tasks to ensure equipment reliability.

  • It involves analyzing the functions and potential failure modes of equipment to determine the most effective maintenance strategies.

  • RCM prioritizes maintenance tasks based on risk and criticality, focusing resources ...read more

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