Ecolab Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 21 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Ecolab.
Ecolab
Technical Engineer
Mid Average Negative experience Accept offer 2 rounds
Interview process
Technical screen Recruiter call
Interview formats
Technical Behavioral
It was a moderate level interview, mostly focused on cooling towers, corrosion, scaling, and fouling. The interview was online and lasted about 30 minutes. There were two rounds in total: first, a technical interview, and second, an HR interview. If you passed the first level, you were selected.
Confirmed questions3 questions
- Can you explain corrosion?
- Can you explain scaling?
- Can you explain fouling?
Ecolab
Lead Engineer
Lead Average Neutral experience No offer 4 rounds
Interview process
Recruiter call Phone screen Onsite Offer
Interview formats
Behavioral Technical
It starts with a phone call with a recruiter, then interview with the hiring Manager, then a meeting with the VP, then they invited for an On-site interview, and finally they send an offer
Confirmed questions1 question
- Can you tell me about the projects you have been working on?
Ecolab
Trainee Engineer
Entry Average Positive experience Accept offer 4 rounds
Interview process
Take home Technical screen Onsite Background check Offer
Interview formats
Technical Coding Behavioral
So first there was an OA test with aptitude questions, and if you scored over 50%, you got to take a technical test. The technical test had 3 DSA problems, 2 easy and 1 medium string question. If you passed that, you had an interview the next day. It was about 30 minutes. I had to introduce myself, answer some DSA questions on strings and arrays (easy/medium), and some situational questions. After that, I qualified for the HR round, which was 15 minutes. They asked about my college, CGPA, extracurriculars, and what I'm seeking in a company, plus other basic HR stuff. Then, background check and offer.
Confirmed questions2 questions
- What is it that you are seeking in this company, job safety or financial gain?
- What is it that you are seeking in this company, job safety or financial gain?
Ecolab Engineer Interview Questions
Quoted word for word from Ecolab interview reports.
“Can you explain how to reverse the direction of a three phase motor?”
Read reports →“Can you explain corrosion?”
Read reports →“Can you explain fouling?”
Read reports →“Explain concepts from Strength of Materials (SOM).”
Read reports →“Can you explain how condensers work?”
Read report →“Could you explain Heat & Mass Transfer?”
Read report →“What do you know about boilers?”
Read report →“What are the concepts of OOPS?”
Read report →“Tell me about the advantages and disadvantages of Artificial intelligence.”
Read report →Formats, difficulty and experience
Across all 21 Ecolab interview reports.