Alstrong Enterprises Site Supervisor Interview Questions and Answers

Q1. Pipline, laying and jointing, trench excavation and restoration and testing, different type of pipes and class, specification of trench and bach filling
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Q2. Different types of pipes
Ans. 
There are various types of pipes used in construction such as PVC, HDPE, GI, CPVC, PEX, etc.
• PVC pipes are commonly used for water supply and drainage systems

• HDPE pipes are used for gas and water supply systems

• GI pipes are used for water supply and irrigation systems

• CPVC pipes are used for hot and cold water supply systems

• PEX pipes are used for radiant heating and cooling systems
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Q3. Specification of trench
Ans. 
Trench specification includes depth, width, slope, and backfill material.
• Depth of trench should be as per design and should not exceed the specified limit.

• Width of trench should be sufficient for workers to move and work comfortably.

• Slope of trench should be maintained to prevent collapse and ensure worker safety.

• Backfill material should be of appropriate quality and compacted properly.

• Trench should be properly marked
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Q4. Hydrotesting of pipeline
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Hydrotesting is a process of testing pipelines for leaks and strength by filling them with water or other fluids.
• The pipeline is filled with water or other fluids under pressure to check for leaks.

• The pressure is maintained for a specified duration to check the strength of the pipeline.

• The test is conducted before the pipeline is put into service to ensure its integrity.

• Hydrotesting is also done periodically to check f...read more
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Hydrtesting of pipeline, construction of Ground level reservior and installation of specialis