J. Kumar Infraprojects QC Engineer Interview Questions and Answers for Experienced

Q1. Brief in QMS why it is adopted
Ans. 
QMS is adopted to ensure consistent quality, meet customer requirements, and improve processes.
• Ensures consistent quality of products or services

• Helps meet customer requirements and expectations

• Improves processes and efficiency

• Reduces risks and errors

• Enhances customer satisfaction

• Provides a framework for continuous improvement
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Q2. Design mix procedure
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Design mix procedure involves determining the proportions of materials to create a concrete mix with desired properties.
• Identify the required strength and durability of the concrete

• Select suitable materials such as cement, aggregates, and water

• Calculate the proportions of each material based on mix design methods

• Test the mix to ensure it meets specifications

• Adjust the mix if necessary to achieve desired properties
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Q1. What is standard deviation how to apply for different grades
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Standard deviation is a measure of the amount of variation or dispersion of a set of values.
• Standard deviation is calculated by taking the square root of the variance.

• It is used to quantify the amount of variation or dispersion of a set of values.

• Higher standard deviation indicates more spread out data points, while lower standard deviation indicates data points are closer to the mean.

• It is commonly used in quality con...read more
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Q2. What is passing criteria and What is MDD and OMC
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Q3. How to clear NCR and what is specific procedure
Ans. 
To clear NCR, identify root cause, implement corrective actions, verify effectiveness, and close out the NCR.
• Identify the root cause of the non-conformance.

• Implement corrective actions to address the root cause.

• Verify the effectiveness of the corrective actions through testing or inspection.

• Close out the NCR once the corrective actions have been successful.

• Document all steps taken in the NCR clearance process.
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Q4. Testing procedure for coarse aggregate
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Testing procedure for coarse aggregate involves determining its physical properties and quality through various tests.
• Conduct sieve analysis to determine particle size distribution

• Perform specific gravity and absorption test to assess porosity

• Check for shape, surface texture, and angularity through visual inspection

• Test for resistance to abrasion and impact to evaluate durability
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Q5. Silt content limit as per is code
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Silt content limit as per IS code is 3% for fine aggregate.
• Silt content limit for fine aggregate as per IS code is 3%.

• Excessive silt content can affect the quality of concrete.

• Silt content can be determined by conducting a sieve analysis test.
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Q1. Mechanical engineering production
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Q2. Oil and gas fertilizer devision
Ans. 
Oil and gas fertilizer division involves the production and distribution of fertilizers derived from oil and gas byproducts.
• Fertilizers are produced using byproducts from the oil and gas industry, such as natural gas liquids or sulfur.

• The fertilizers produced can include nitrogen-based fertilizers like ammonia or urea, as well as sulfur-based fertilizers like ammonium sulfate.

• The division may involve processes such as ...read more
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Q3. Respected sir/ma'am, I Suresh attaching my brief resume for your kind consideration in your organisation. Pls take a look and let me know if any opportunity is there with you. ...read more
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Q4. Respected sir/ma'am, I Suresh attaching my brief resume for your kind consideration in your organisation. Pls take a look and let me know if any opportunity is there with you. ...read more
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Previous experience and job profile and working

Q1. Sap , paint shop production
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Q1. Why do you want to do job?
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Q2. Why have you joined Electronics?
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Q3. What is Ohm's law?
Ans. 
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
• Ohm's law is represented by the equation I = V/R, where I is the current, V is the voltage, and R is the resistance.

• It is named after Georg Simon Ohm, a German physicist who first formulated this law.

• This law is applicable to all types of circuits, including DC and AC circuits.

• It is use...read more
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Q1. What is Full form DOL starter
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DOL starter stands for Direct-On-Line starter, used to start motors by directly connecting them to the power supply.
• DOL starter is the simplest and most common type of motor starter.

• It directly connects the motor to the power supply without any intermediate starting method.

• It provides full voltage to the motor during starting, which can cause high inrush current.

• DOL starters are suitable for small to medium-sized motor...read more
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Q2. What is APFC PANEL
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APFC PANEL stands for Automatic Power Factor Correction Panel, used to maintain power factor in electrical systems.
• APFC PANEL automatically monitors and corrects the power factor of electrical systems.

• It helps in reducing electricity bills by maintaining a high power factor.

• APFC PANELs are commonly used in industries and commercial buildings.

• They consist of capacitors that are switched on and off based on the load requ...read more
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Q3. Star dalta conection
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Q1. Please provide all the required sizes of sieves needed to establish a fine aggregate sieve analysis.
Ans. 
The required sizes of sieves for fine aggregate sieve analysis are typically 3/8", #4, #8, #16, #30, #50, #100, and pan.
• 3/8" sieve

• #4 sieve

• #8 sieve

• #16 sieve

• #30 sieve

• #50 sieve

• #100 sieve

• Pan
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Q2. What is characteristic strength and terget mean strength ? Relation between both ?
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Characteristic strength is the strength of a material below which not more than a specified proportion of test results are expected to fall. Target mean strength is the strength that a structure is designed to achieve.
• Characteristic strength is a statistical value representing the lower tail of the strength distribution of a material.

• Target mean strength is the strength that a structure is designed to achieve based on ...read more
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Q3. Explain M25 and what should be the value of cube of M25 grade concrete ?
Ans. 
M25 is a mix of concrete with a compressive strength of 25 MPa. The cube strength of M25 grade concrete should be 25 MPa.
• M25 is a mix of concrete with a compressive strength of 25 MPa.

• The cube strength of M25 grade concrete should be 25 MPa.

• The mix proportion for M25 grade concrete is usually 1:1:2 (cement:sand:aggregate).
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Q4. Difference between OPC and PPC cement ?
Ans. 
OPC cement is Ordinary Portland Cement, while PPC cement is Portland Pozzolana Cement.
• OPC is made by grinding clinker with gypsum, while PPC is made by intergrinding clinker with fly ash and gypsum.

• PPC has higher long-term strength and durability compared to OPC.

• PPC is more environmentally friendly due to the use of fly ash as a partial replacement for clinker.

• OPC is commonly used for general construction purposes, whi...read more
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Q1. Salary expectation and place of posting
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Q2. Discussion about adjust notice period
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Q3. Family background and future planning
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