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Lohum Cleantech Interview Questions and Answers

Updated 27 Jan 2025
Popular Designations

13 Interview questions

An Operator was asked 8mo ago
Q. What is the difference between vaporization and evaporation?
Ans. 

Vaporization is the process of turning a liquid into a gas through heat, while evaporation is the process of a liquid turning into a gas at a temperature below its boiling point.

  • Vaporization requires heat to change a liquid into a gas, while evaporation can occur at room temperature.

  • Vaporization is a rapid process, such as boiling water to create steam, while evaporation is a slower process, like a puddle drying u...

View all Operator interview questions
An Operator was asked 8mo ago
Q. What are the differences between solvent extraction and distillation?
Ans. 

Solvent extraction involves using a solvent to separate compounds, while distillation involves separating compounds based on their boiling points.

  • Solvent extraction uses a solvent to dissolve the desired compound, which is then separated from the solvent. Distillation involves heating a mixture to separate compounds based on their boiling points.

  • Solvent extraction is often used in the extraction of essential oils ...

View all Operator interview questions
An Operator was asked 8mo ago
Q. What is distillation?
Ans. 

Distillation is a process of separating components of a liquid mixture based on differences in boiling points.

  • Distillation involves heating the liquid mixture to create vapor, then cooling the vapor to condense it back into liquid form.

  • The components with lower boiling points will vaporize first and be collected, while the components with higher boiling points will remain in the liquid phase.

  • Common examples of dis...

View all Operator interview questions
An Operator was asked 8mo ago
Q. What is evaporation?
Ans. 

Evaporation is the process by which a liquid turns into a gas due to heat energy.

  • Evaporation occurs when molecules at the surface of a liquid gain enough energy to escape into the air.

  • It is a cooling process as it removes heat from the liquid.

  • Examples include water evaporating from a puddle on a hot day or sweat evaporating from our skin.

  • Evaporation is an important part of the water cycle.

View all Operator interview questions
A Senior Product Executive was asked 8mo ago
Q. How many mainten nickel %
Ans. 

The question is unclear and seems to be asking for a percentage of maintenance nickel.

  • Ask for clarification on what 'mainten nickel %' refers to

  • Provide examples of different interpretations of the question

  • Offer to discuss the topic further to gain a better understanding

View all Senior Product Executive interview questions
A Quality Engineer was asked
Q. How do you read drawings and create reports?
Ans. 

Reading drawings involves understanding symbols, dimensions, and tolerances to create accurate reports.

  • Study the title block for important information like part number, revision, and scale

  • Identify different views (top, front, side) and understand how they relate to the actual part

  • Interpret symbols for features like holes, threads, and surface finishes

  • Measure dimensions accurately using a ruler or calipers

  • Note tole...

View all Quality Engineer interview questions
A Shift Incharge was asked 4mo ago
Q. Centrifugal pump working
Ans. 

A centrifugal pump works by converting mechanical energy from a motor into kinetic energy in a fluid through the rotation of an impeller.

  • Centrifugal pump uses an impeller to rotate and create a centrifugal force to move fluid.

  • The rotation of the impeller creates a low-pressure area at the center of the pump, drawing fluid in.

  • The fluid is then pushed outward by the centrifugal force, increasing its velocity and pre...

View all Shift Incharge interview questions
Are these interview questions helpful?
An Operator was asked 8mo ago
Q. What is heat transfer
Ans. 

Heat transfer is the process of energy moving from a warmer object to a cooler object.

  • Heat transfer can occur through conduction, convection, or radiation.

  • Conduction is the transfer of heat through direct contact between objects, like a metal spoon heating up in a hot drink.

  • Convection is the transfer of heat through the movement of fluids, like boiling water in a pot.

  • Radiation is the transfer of heat through elect...

View all Operator interview questions
An Operator was asked 8mo ago
Q. What is Solvent extraction
Ans. 

Solvent extraction is a method used to separate compounds based on their solubility in different solvents.

  • Solvent extraction involves mixing a sample with a solvent that can selectively dissolve the desired compound.

  • The mixture is then separated into layers, with the compound of interest being extracted into the solvent layer.

  • Common examples include extracting caffeine from coffee beans using water or extracting e...

View all Operator interview questions
A Quality Engineer was asked
Q. Least count of the instrument
Ans. 

Least count of an instrument refers to the smallest change in the measured quantity that can be detected by the instrument.

  • Least count is determined by the smallest division on the scale of the instrument.

  • It is important to consider the least count when taking measurements to ensure accuracy.

  • For example, a ruler with millimeter divisions has a least count of 1 mm.

  • Another example is a digital caliper with a least c...

View all Quality Engineer interview questions

Lohum Cleantech Interview Experiences

16 interviews found

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Sep 2024. There was 1 interview round.

Round 1 - Technical 

(5 Questions)

  • Q1. How many ph mainten nickel crystal
  • Ans. 

    The question is unclear and seems to be asking about the number of pH maintenance nickel crystals.

    • It is unclear what 'ph mainten nickel crystal' refers to

    • It is possible the interviewer made a mistake in phrasing the question

    • Ask for clarification or provide an educated guess based on context

  • Answered by AI
  • Q2. How many ph mainten raw material dissolve in water and leaching time
  • Ans. 

    pH maintenance raw materials dissolve in water and leaching time depend on the specific material and conditions.

    • The number of pH maintenance raw materials that dissolve in water varies depending on the specific materials being used.

    • Leaching time can also vary based on factors such as temperature, pH level, and agitation.

    • Examples of pH maintenance raw materials include limestone, dolomite, and hydrated lime.

  • Answered by AI
  • Q3. How many mainten nickel gpl
  • Ans. 

    The question is unclear and seems to be asking for the number of maintenance nickel GPL, which is not a standard term.

    • It is unclear what 'mainten nickel GPL' refers to

    • Ask for clarification or more context from the interviewer

    • Provide examples of similar terms or concepts you are familiar with

  • Answered by AI
  • Q4. How many mainten nickel %
  • Ans. 

    The question is unclear and seems to be asking for a percentage of maintenance nickel.

    • Ask for clarification on what 'mainten nickel %' refers to

    • Provide examples of different interpretations of the question

    • Offer to discuss the topic further to gain a better understanding

  • Answered by AI
  • Q5. How many mainten solid % nickel
  • Ans. 

    The question is unclear and lacks context. It seems to be asking about the percentage of nickel in a maintenance solid, but more information is needed for a precise answer.

    • Request clarification on the type of maintenance solid being referred to (e.g. metal alloy, coating, etc.)

    • Ask for the specific context in which the nickel percentage is relevant (e.g. for corrosion resistance, strength, etc.)

    • Provide examples of diffe...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Knowledge leaching raw material and crystal production
Interview experience
2
Poor
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company

Round 1 - HR 

(2 Questions)

  • Q1. How many years of experience
  • Q2. In which department you doing work
Round 2 - Technical 

(2 Questions)

  • Q1. Question about technical knowledge
  • Q2. Question about your work experience
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed in Aug 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Pump & batch processing
  • Q2. Mass balance and conversion
Round 2 - Aptitude Test 

Very different types question in paper

Interview Preparation Tips

Interview preparation tips for other job seekers - marketing company question in paper

Operator Interview Questions & Answers

user image Salim Khan

posted on 19 Oct 2024

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Walk-in and was interviewed in Apr 2024. There were 3 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. What is Solvent extraction
  • Ans. 

    Solvent extraction is a method used to separate compounds based on their solubility in different solvents.

    • Solvent extraction involves mixing a sample with a solvent that can selectively dissolve the desired compound.

    • The mixture is then separated into layers, with the compound of interest being extracted into the solvent layer.

    • Common examples include extracting caffeine from coffee beans using water or extracting essent...

  • Answered by AI
  • Q2. What is distillation
  • Ans. 

    Distillation is a process of separating components of a liquid mixture based on differences in boiling points.

    • Distillation involves heating the liquid mixture to create vapor, then cooling the vapor to condense it back into liquid form.

    • The components with lower boiling points will vaporize first and be collected, while the components with higher boiling points will remain in the liquid phase.

    • Common examples of distilla...

  • Answered by AI
Round 2 - Technical 

(2 Questions)

  • Q1. What is evaporation
  • Ans. 

    Evaporation is the process by which a liquid turns into a gas due to heat energy.

    • Evaporation occurs when molecules at the surface of a liquid gain enough energy to escape into the air.

    • It is a cooling process as it removes heat from the liquid.

    • Examples include water evaporating from a puddle on a hot day or sweat evaporating from our skin.

    • Evaporation is an important part of the water cycle.

  • Answered by AI
  • Q2. What is heat transfer
  • Ans. 

    Heat transfer is the process of energy moving from a warmer object to a cooler object.

    • Heat transfer can occur through conduction, convection, or radiation.

    • Conduction is the transfer of heat through direct contact between objects, like a metal spoon heating up in a hot drink.

    • Convection is the transfer of heat through the movement of fluids, like boiling water in a pot.

    • Radiation is the transfer of heat through electromag...

  • Answered by AI
Round 3 - Technical 

(2 Questions)

  • Q1. Different between solvent extraction and distillation
  • Ans. 

    Solvent extraction involves using a solvent to separate compounds, while distillation involves separating compounds based on their boiling points.

    • Solvent extraction uses a solvent to dissolve the desired compound, which is then separated from the solvent. Distillation involves heating a mixture to separate compounds based on their boiling points.

    • Solvent extraction is often used in the extraction of essential oils from ...

  • Answered by AI
  • Q2. Different between Vaporization and evaporation
  • Ans. 

    Vaporization is the process of turning a liquid into a gas through heat, while evaporation is the process of a liquid turning into a gas at a temperature below its boiling point.

    • Vaporization requires heat to change a liquid into a gas, while evaporation can occur at room temperature.

    • Vaporization is a rapid process, such as boiling water to create steam, while evaporation is a slower process, like a puddle drying up.

    • Vap...

  • Answered by AI
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Group Discussion 

Chemical engineer company

Round 2 - Technical 

(2 Questions)

  • Q1. Centrifugal pump working
  • Ans. 

    A centrifugal pump works by converting mechanical energy from a motor into kinetic energy in a fluid through the rotation of an impeller.

    • Centrifugal pump uses an impeller to rotate and create a centrifugal force to move fluid.

    • The rotation of the impeller creates a low-pressure area at the center of the pump, drawing fluid in.

    • The fluid is then pushed outward by the centrifugal force, increasing its velocity and pressure...

  • Answered by AI
  • Q2. Boiler working
Round 3 - Case Study 

Technical questions and answers
Chemical industries

Operator Interview Questions & Answers

user image Anonymous

posted on 26 Jun 2024

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
6-8 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - One-on-one 

(2 Questions)

  • Q1. Interview related questions
  • Q2. One by one interview
Round 2 - HR 

(2 Questions)

  • Q1. Mass transfer related Questions
  • Q2. Heat transfer related Questions
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(3 Questions)

  • Q1. Why are you making this switch?
  • Q2. Working culture
  • Q3. Top line & bottom line
Round 2 - HR 

(1 Question)

  • Q1. Salary in hand, expectations.

Sales Interview Questions & Answers

user image Anonymous

posted on 1 Apr 2024

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement

Round 1 - Group Discussion 

Topic- Which of the three R's in Reduce Reuse and Recycle is the best

Round 2 - Technical 

(1 Question)

  • Q1. Asked me to sell them a toffee
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Assignment 

1 quality production

Round 2 - Technical 

(1 Question)

  • Q1. Machine mentioned

QC Executive Interview Questions & Answers

user image Anonymous

posted on 23 Jul 2023

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via LinkedIn and was interviewed in Jun 2023. There were 3 interview rounds.

Round 1 - One-on-one 

(2 Questions)

  • Q1. Self introduction, normality, molarity, PH meter, acid and base, titration & etc.
  • Q2. Molecular weight of chemical compounds
  • Ans. 

    Molecular weight is the sum of the atomic weights of all atoms in a molecule.

    • Molecular weight is calculated by adding up the atomic weights of all the atoms in a molecule.

    • It is expressed in atomic mass units (amu) or grams per mole (g/mol).

    • For example, the molecular weight of water (H2O) is 18.015 g/mol (2*1.008 + 15.999).

  • Answered by AI
Round 2 - Aptitude Test 

How to make solutions for H2SO4, HCL, NaOH & etc

Round 3 - HR 

(1 Question)

  • Q1. Salary discussion and family background

Top trending discussions

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Interview Tips & Stories
2w
toobluntforu
·
works at
Cvent
Can speak English, can’t deliver in interviews
I feel like I can't speak fluently during interviews. I do know english well and use it daily to communicate, but the moment I'm in an interview, I just get stuck. since it's not my first language, I struggle to express what I actually feel. I know the answer in my head, but I just can’t deliver it properly at that moment. Please guide me
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Lohum Cleantech Interview FAQs

How many rounds are there in Lohum Cleantech interview?
Lohum Cleantech interview process usually has 2-3 rounds. The most common rounds in the Lohum Cleantech interview process are Technical, HR and Resume Shortlist.
How to prepare for Lohum Cleantech interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Lohum Cleantech. The most common topics and skills that interviewers at Lohum Cleantech expect are Business Administration, Cloud, Commerce, Communication Skills and Compliance.
What are the top questions asked in Lohum Cleantech interview?

Some of the top questions asked at the Lohum Cleantech interview -

  1. How many ph mainten raw material dissolve in water and leaching t...read more
  2. Different between solvent extraction and distillat...read more
  3. How many mainten solid % nic...read more
How long is the Lohum Cleantech interview process?

The duration of Lohum Cleantech interview process can vary, but typically it takes about less than 2 weeks to complete.

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Overall Interview Experience Rating

3.5/5

based on 18 interview experiences

Difficulty level

Moderate 78%
Hard 22%

Duration

Less than 2 weeks 82%
2-4 weeks 9%
6-8 weeks 9%
View more

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Lohum Cleantech Reviews and Ratings

based on 101 reviews

3.1/5

Rating in categories

3.2

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2.8

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