Damati Plastics Plastic Engineer Interview Questions and Answers

Engineering reasoning

Q1. Types of chiller, compressor & plastic,
Ans. 
There are different types of chillers, compressors, and plastics used in engineering.
• Types of chillers include absorption, centrifugal, and screw chillers.

• Compressors can be classified as reciprocating, rotary, and centrifugal compressors.

• Plastics used in engineering include polyethylene, polypropylene, and polystyrene.

• Each type of chiller, compressor, and plastic has its own unique properties and applications.
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Q2. Pneumatic & hydraulic, valves & actuators
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Q3. Cooling tower, range, approach
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Q4. Gear box & its types
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Gear box is a mechanical device that transmits power from an engine to the wheels. There are various types of gearboxes.
• Gearboxes are used in automobiles, industrial machinery, and other applications.

• The most common types of gearboxes are manual, automatic, and continuously variable transmissions (CVT).

• Manual gearboxes require the driver to manually shift gears using a clutch and gear stick.

• Automatic gearboxes shift ge...read more
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Q1. Types of chiller, refrigerant
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There are two types of chillers: air-cooled and water-cooled. Common refrigerants include R-22, R-134a, and R-410A.
• Air-cooled chillers use air to remove heat from the refrigerant, while water-cooled chillers use water.

• R-22 is a commonly used refrigerant, but it is being phased out due to its harmful effects on the environment.

• R-134a is a more environmentally friendly refrigerant, but it is less efficient than R-22.

• R-41...read more
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Q1. Tell mi about yourself
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Q1. Type of moulding?
Ans. 
Various types of moulding processes used in manufacturing.
• Injection moulding - most common method for producing plastic parts

• Blow moulding - used for hollow objects like bottles

• Compression moulding - used for thermosetting plastics

• Extrusion moulding - used for creating long shapes like pipes

• Rotational moulding - used for large, hollow products like tanks
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Q2. Different type of water filter?
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Different types of water filters include reverse osmosis, activated carbon, UV filters, and ceramic filters.
• Reverse osmosis filters use a semipermeable membrane to remove contaminants.

• Activated carbon filters absorb impurities and improve taste.

• UV filters use ultraviolet light to kill bacteria and viruses.

• Ceramic filters physically block contaminants from passing through.
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Q3. What is uv in filter?
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UV in filter refers to ultraviolet light used to kill bacteria and other microorganisms in water filtration systems.
• UV light is used in water filters to disinfect water by killing bacteria, viruses, and other microorganisms.

• UV filters are commonly used in water treatment plants, aquariums, and residential water filtration systems.

• UV filters are effective at destroying harmful pathogens without the use of chemicals.

• UV f...read more
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Q4. What is TDS in water?
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TDS stands for Total Dissolved Solids in water, which includes minerals, salts, metals, and other substances.
• TDS is a measure of the combined content of all inorganic and organic substances contained in a liquid in molecular, ionized, or micro-granular suspended form.

• It is commonly measured in parts per million (ppm) or milligrams per liter (mg/L).

• High TDS levels can affect the taste of water and indicate potential con...read more
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Q1. Personal information
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Q1. Technical Information
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Q1. Responsibilities details
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Q1. Why want to switch, salary expecting
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Q1. In depth of process handling and troubleshooting relating with material and machine behaviour
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Q1. Tell me about your self
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Q1. Why are you leaving previous job?
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Q2. What was your last drawn salary?
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Q1. Production targets
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Production targets are set goals for the quantity and quality of products to be produced within a specific timeframe.
• Production targets are typically set based on market demand, available resources, and production capacity.

• Targets should be realistic, achievable, and aligned with overall business objectives.

• Regular monitoring and adjustment of targets may be necessary to ensure optimal production efficiency.

• Examples: S...read more
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Q2. Quality products
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Q3. Empty tube making
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