Khaitan Chemicals & Fertilizers QC Lab Chemist Interview Questions and Answers

Q1. What is dol starter
Ans. 
A DOL starter is a Direct-On-Line starter used to start induction motors by directly connecting them to the power supply.
• DOL starters provide full voltage to the motor during starting.

• They are simple in design and cost-effective.

• Commonly used in applications where the motor load is constant and does not require speed control.

• Example: Starting a water pump motor in a residential building.
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Q2. Type of moter
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There are various types of motors including DC motors, AC motors, stepper motors, and servo motors.
• DC motors operate on direct current and are commonly used in household appliances and electric vehicles.

• AC motors operate on alternating current and are used in industrial applications.

• Stepper motors move in precise increments and are commonly used in 3D printers and CNC machines.

• Servo motors are controlled by a feedback ...read more
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Q1. Type of starter
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There are various types of starters used in electrical engineering, such as DOL starter, star-delta starter, and soft starter.
• Direct On-Line (DOL) starter is the simplest type, providing full voltage to the motor at start.

• Star-delta starter reduces the starting current by initially connecting the motor in star configuration and then switching to delta.

• Soft starter gradually increases the voltage to the motor, reducing ...read more
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Q1. Introduction and previous Job
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Q1. About Index in Sql and java script related question
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Q1. What are your strengths and weaknesses?
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Q2. What are your salary expectations?
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Q3. What is your family background?
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Q4. Share details of your previous job.
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Q5. Why should we hire you?
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Q6. Why are you looking for a change?
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Q7. Where do you see yourself in 5 years?
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Q8. Tell me about yourself.
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Q9. Who is your HR in IFFCO KISHAN CATTELFEAd, do you like him, why
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Q10. What kind of work he did
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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
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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
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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
Ans. 
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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Q1. Brief self Introduction
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Q2. Work experience and job role in different company
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Q3. Best achievement in career.
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Q4. Fundamental and project chemistry
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Q1. Job summary and expected CTC
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Q2. Notice period information
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Q1. Brief discussion with head
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Resoning grammar math

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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Q1. Tell me about yourself
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Q2. What is an invoice?
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An invoice is a document issued by a seller to a buyer, detailing the products or services provided and the amount due.
• An invoice typically includes information such as the seller's contact information, the buyer's contact information, a description of the products or services provided, the quantity, the price, and the total amount due.

• Invoices are used in business transactions to request payment from the buyer for the...read more
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