Upload Button Icon Add office photos

National Fertilizers

Compare button icon Compare button icon Compare

Filter interviews by

National Fertilizers Instrument Engineer Interview Questions, Process, and Tips

Updated 18 Mar 2025

Top National Fertilizers Instrument Engineer Interview Questions and Answers

National Fertilizers Instrument Engineer Interview Experiences

3 interviews found

Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
More than 8 weeks
Result
Selected Selected

I appeared for an interview before Mar 2024, where I was asked the following questions.

  • Q1. What methods can be employed to enhance the efficiency of a plant?
  • Ans. 

    Enhancing plant efficiency involves optimizing processes, reducing waste, and implementing advanced technologies.

    • Implement process automation to reduce manual intervention and increase precision.

    • Utilize predictive maintenance to minimize downtime and extend equipment life.

    • Adopt energy-efficient technologies, such as variable frequency drives (VFDs) for motors.

    • Optimize process control systems to improve product quality ...

  • Answered by AI
  • Q2. How can the plant be optimized for efficiency?
  • Ans. 

    Optimizing plant efficiency involves enhancing processes, reducing waste, and leveraging technology for better performance.

    • Implement advanced process control systems to maintain optimal operating conditions.

    • Conduct regular maintenance and calibration of instruments to ensure accuracy and reliability.

    • Utilize data analytics to identify inefficiencies and areas for improvement.

    • Train staff on best practices and new technol...

  • Answered by AI
  • Q3. How do you plan to guide your junior staff members?
  • Ans. 

    I plan to guide junior staff through mentorship, structured training, and fostering a collaborative environment for growth.

    • Establish a mentorship program where I pair junior engineers with experienced staff for hands-on learning.

    • Conduct regular training sessions on industry standards and best practices, such as safety protocols in instrumentation.

    • Encourage open communication by creating a safe space for juniors to ask ...

  • Answered by AI
  • Q4. Loading and unloading system of Compressor
  • Ans. 

    Loading and unloading systems in compressors manage pressure and flow for efficient operation and safety.

    • Loading refers to the process of bringing the compressor up to its operational capacity.

    • Unloading is the process of reducing the compressor's load to prevent overpressure.

    • Common methods include variable speed drives and unloaders that adjust the intake valves.

    • For example, in a reciprocating compressor, unloading can...

  • Answered by AI
  • Q5. Steps for water Treatment Plant
  • Ans. 

    Water treatment plants purify water through various processes to ensure safe drinking water.

    • 1. Screening: Removes large debris like leaves and plastic.

    • 2. Coagulation: Chemicals like alum are added to clump particles together.

    • 3. Sedimentation: Heavy particles settle at the bottom of the tank.

    • 4. Filtration: Water passes through sand and gravel to remove smaller particles.

    • 5. Disinfection: Chlorine or UV light is used to k...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep your knowledge current in preparation for the upcoming interview.

Interview Questionnaire 

5 Questions

  • Q1. Thermocouple
  • Q2. RTD
  • Q3. Control valve
  • Q4. Pressure switch
  • Q5. Transmitter

Instrument Engineer Interview Questions Asked at Other Companies

Q1. 1.General current and voltage working ranges of instruments. 2. T ... read more
Q2. What is meant by transmitters and it's difference of 3wire and 4 ... read more
Q3. Whate is digital input and digital output & analoge input and ... read more
Q4. Which fire and gas protection system is familiar for you
Q5. How you trouble shoot s7 PLC, Do you have designing knowledge
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Zero supression
  • Q2. Zero elevation

Interview questions from similar companies

I applied via Company Website and was interviewed in Jun 2021. There were 4 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Difference between Star/Delta starter for motor?
  • Ans. 

    Star/Delta starter is used to reduce the starting current of a motor.

    • Star connection provides high starting torque but high starting current

    • Delta connection provides low starting torque but low starting current

    • Star/Delta starter uses both connections to reduce starting current and provide sufficient starting torque

    • Used for large motors to prevent damage to motor and electrical system

  • Answered by AI
  • Q2. CV calculation of control Valve?
  • Ans. 

    CV calculation of control valve involves determining the valve's flow coefficient.

    • CV is calculated using the formula: CV = Q / (SG * sqrt(dP))

    • Q is the flow rate, SG is the specific gravity of the fluid, and dP is the pressure drop across the valve.

    • CV is used to select the appropriate valve size for a given application.

    • Factors such as valve type, trim size, and pressure drop affect the CV value.

    • CV calculation is importa...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Clear your basic fundamentals and show your confidence.
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed before Feb 2022. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Technical standards, hazards zone, field Instrumentation, DCS.
Round 3 - Case Study 

Challanges in job, safety , risk and hazards

Round 4 - HR 

(1 Question)

  • Q1. Introduction, communication skills, presentation, salary discussion.

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare all I mentioned above, if you want to join aarti.
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Fundamentals of instrumentation with practical knowledge
  • Q2. All flow meter accuracy
  • Ans. 

    Flow meter accuracy depends on various factors such as type of flow meter, fluid properties, and installation conditions.

    • The type of flow meter used affects its accuracy. For example, a differential pressure flow meter may have an accuracy of +/- 0.5% of the flow rate, while a magnetic flow meter may have an accuracy of +/- 0.25%.

    • Fluid properties such as viscosity, density, and conductivity can also affect flow meter a...

  • Answered by AI
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. DCS, Plc, Transmitter, Related
Round 3 - HR 

(1 Question)

  • Q1. Experience, Expected salary

Interview Preparation Tips

Interview preparation tips for other job seekers - Good for starting candidate, Good for learning, supportive team

I applied via Walk-in and was interviewed before Mar 2019. There were 3 interview rounds.

Interview Questionnaire 

6 Questions

  • Q1. Laws of thermodynamics.
  • Ans. 

    Laws governing energy and its transformations in physical systems.

    • First law: Energy cannot be created or destroyed, only transferred or converted.

    • Second law: Entropy of a closed system always increases over time.

    • Third law: Absolute zero cannot be reached.

    • Applications in engineering, physics, and chemistry.

    • Examples: heat engines, refrigeration, combustion, chemical reactions.

  • Answered by AI
  • Q2. Principle of steam ejectors.
  • Ans. 

    Steam ejectors are devices that use steam to create a vacuum by entraining and compressing gases or vapors.

    • Steam ejectors work by using a high-pressure steam jet to create a low-pressure zone, which draws in gases or vapors from the surrounding area.

    • The entrained gases or vapors are then compressed and discharged through a diffuser, which increases their velocity and reduces their pressure.

    • Steam ejectors are commonly u...

  • Answered by AI
  • Q3. Working of heat pump.
  • Ans. 

    Heat pump is a device that transfers heat from a lower temperature to a higher temperature.

    • Heat pump works on the principle of refrigeration cycle.

    • It consists of four main components: evaporator, compressor, condenser, and expansion valve.

    • The refrigerant absorbs heat from the low-temperature source (air, water, or ground) in the evaporator and gets converted into a gas.

    • The compressor then compresses the gas, which incr...

  • Answered by AI
  • Q4. What is grinding ?
  • Ans. 

    Grinding is a process of removing material from a workpiece using an abrasive wheel or belt.

    • Grinding is used to achieve high dimensional accuracy and surface finish.

    • It is commonly used in manufacturing industries for finishing operations.

    • Different types of grinding machines are used for different applications such as cylindrical, surface, and centerless grinding.

    • Grinding can be done manually or with the help of compute...

  • Answered by AI
  • Q5. Describe your final year project.
  • Q6. Proficiency about Auto cad.

Interview Preparation Tips

Interview preparation tips for other job seekers - Require engineering basic knowledge in your field.

I applied via Referral and was interviewed before Jan 2021. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. About the process used in industries.

Interview Preparation Tips

Interview preparation tips for other job seekers - The interview was good .

I applied via Referral and was interviewed before Apr 2021. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - HR 

(3 Questions)

  • Q1. What is your family background?
  • Q2. Tell me about yourself.
  • Q3. Why are you looking for a change?

Interview Preparation Tips

Topics to prepare for Aarti Industries Graduate Apprentice Trainee interview:
  • Valves
  • Centrifugal Pumps
  • Vacuum Pumps
  • gaskets
Interview preparation tips for other job seekers - Do not take GAT job in aarti.
Its terrible to work because they do not provide any good culture to learn something.

National Fertilizers Interview FAQs

How many rounds are there in National Fertilizers Instrument Engineer interview?
National Fertilizers interview process usually has 1 rounds. The most common rounds in the National Fertilizers interview process are Technical.
What are the top questions asked in National Fertilizers Instrument Engineer interview?

Some of the top questions asked at the National Fertilizers Instrument Engineer interview -

  1. What methods can be employed to enhance the efficiency of a pla...read more
  2. How can the plant be optimized for efficien...read more
  3. Loading and unloading system of Compress...read more

Tell us how to improve this page.

National Fertilizers Instrument Engineer Interview Process

based on 2 interviews

Interview experience

5
  
Excellent
View more

Interview Questions from Similar Companies

Aarti Industries Interview Questions
4.1
 • 286 Interviews
UPL Interview Questions
4.1
 • 179 Interviews
PI Industries Interview Questions
4.0
 • 108 Interviews
Rallis India Interview Questions
4.2
 • 39 Interviews
IFFCO Interview Questions
4.1
 • 38 Interviews
FMC Corporation Interview Questions
3.9
 • 34 Interviews
View all
National Fertilizers Instrument Engineer Salary
based on 5 salaries
₹11 L/yr - ₹15.5 L/yr
117% more than the average Instrument Engineer Salary in India
View more details

National Fertilizers Instrument Engineer Reviews and Ratings

based on 1 review

1.0/5

Rating in categories

1.0

Skill development

1.0

Work-life balance

1.0

Salary

1.0

Job security

1.0

Company culture

1.0

Promotions

1.0

Work satisfaction

Explore 1 Review and Rating
Assistant Manager
82 salaries
unlock blur

₹11 L/yr - ₹19.5 L/yr

Engineer
26 salaries
unlock blur

₹9.3 L/yr - ₹13 L/yr

Graduate Apprentice Trainee
23 salaries
unlock blur

₹0.6 L/yr - ₹3 L/yr

Apprentice
19 salaries
unlock blur

₹0.9 L/yr - ₹3 L/yr

Mechanical Engineer
18 salaries
unlock blur

₹9 L/yr - ₹18 L/yr

Explore more salaries
Compare National Fertilizers with

Aarti Industries

4.1
Compare

UPL

4.1
Compare

Coromandel International

4.1
Compare

PI Industries

4.0
Compare
Did you find this page helpful?
Yes No
write
Share an Interview