Willowood Chemicals Interview Questions and Answers for Experienced

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Q1. Why should we hire you?
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Q2. Tell me about yourself.
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Q3. Where do you see yourself in 5 years?
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3 question in 1.5 hours hard questions

Q1. Implement priority queue
Ans. 
Priority queue is a data structure that stores elements based on their priority.
• Use a binary heap to implement a priority queue.

• Elements are inserted based on priority and removed in order of priority.

• Example: Inserting elements with priority values and removing them in sorted order.
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Q2. Implement stack and queue
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Implement stack and queue using arrays
• For stack, use array and implement push and pop operations

• For queue, use array and implement enqueue and dequeue operations

• Example: Stack - push(1), push(2), pop() -> returns 2

• Example: Queue - enqueue(1), enqueue(2), dequeue() -> returns 1
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Q1. What is bumping clearance in Reciprocating compressor
Ans. 
Bumping clearance in a reciprocating compressor is the minimum distance between the piston and the cylinder head at the top dead center.
• Bumping clearance is crucial to prevent contact between the piston and the cylinder head during operation.

• It is necessary to allow for thermal expansion of the components and to avoid damage.

• Proper bumping clearance ensures efficient operation and prolongs the lifespan of the compresso...read more
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Q2. What is mechanical seal
Ans. 
A mechanical seal is a device that helps prevent leakage between two moving or stationary parts in a machine.
• Used in pumps, compressors, and other rotating equipment

• Consists of two main parts: stationary seal face and rotating seal face

• Common types include cartridge seals, component seals, and split seals
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Q3. Why pressure vessels made in cylindrical shape or spherical shape
Ans. 
Pressure vessels are made in cylindrical or spherical shapes for structural integrity, ease of fabrication, and efficient use of material.
• Cylindrical shape provides uniform stress distribution and is easier to fabricate compared to other shapes.

• Spherical shape can withstand higher internal pressure due to uniform stress distribution in all directions.

• Cylindrical shape is commonly used for horizontal pressure vessels li...read more
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Q4. What is basic difference between ASME codes and API codes
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ASME codes are primarily used for pressure vessels and piping systems, while API codes are focused on the oil and gas industry.
• ASME codes are more general and cover a wide range of industries, while API codes are specific to the oil and gas industry.

• ASME codes are developed by the American Society of Mechanical Engineers, while API codes are developed by the American Petroleum Institute.

• ASME codes focus on design, cons...read more
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Q5. What are the micro alloys elements added to alloy steel
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Micro alloy elements added to alloy steel improve strength, toughness, and hardenability.
• Common micro alloy elements include vanadium, niobium, titanium, and boron.

• These elements help refine the grain structure of the steel, resulting in improved mechanical properties.

• Micro alloying also allows for the use of lower carbon content, reducing the risk of cracking during heat treatment.
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