Cotmac Electronics System Engineer Interview Questions and Answers

Aptitude questions aswell as core subjects

Q1. Based on core subjects and projects
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Q1. Regarding location
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Q1. What are the types of AHU modes
Ans. 
The types of AHU modes include cooling mode, heating mode, and ventilation mode.
• Cooling mode: AHU cools the air before circulating it throughout the building.

• Heating mode: AHU heats the air before circulating it throughout the building.

• Ventilation mode: AHU circulates fresh air throughout the building without heating or cooling.
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Q2. Difference between Heatwheel and Energy wheel
Ans. 
Heatwheel and Energy wheel are both types of energy recovery ventilation systems used in HVAC systems, but they differ in their specific mechanisms and applications.
• Heatwheel uses a rotating wheel with a desiccant coating to transfer heat and moisture between incoming and outgoing air streams, while Energy wheel uses a rotating wheel with a matrix of heat-absorbing material to transfer heat only.

• Heatwheel is more effec...read more
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Q3. What to we use in primary pump systems if we don't have bypass valve
Ans. 
In primary pump systems without a bypass valve, we can use a variable frequency drive (VFD) to control the pump speed.
• Use a variable frequency drive (VFD) to adjust the speed of the pump based on system demand

• VFDs can help maintain system pressure and flow without the need for a bypass valve

• VFDs can also improve energy efficiency by matching pump speed to actual system requirements
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Q4. Types of chiller operating mode
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Types of chiller operating modes include constant speed, variable speed, and hybrid mode.
• Constant speed mode: Chiller operates at a fixed speed regardless of load.

• Variable speed mode: Chiller adjusts speed based on load requirements for energy efficiency.

• Hybrid mode: Combines constant and variable speed modes for optimal performance.

• Examples: Centrifugal chillers often operate in variable speed mode for energy savings.
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It was based on core knowledge

Q1. What is you name
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Q1. What is safety system Architecture
Ans. 
Safety system architecture refers to the design and structure of systems that ensure the safety of operations and prevent accidents.
• Safety system architecture involves the arrangement of components, functions, and interfaces to achieve safety goals.

• It includes redundancy, fault tolerance, and fail-safe mechanisms to minimize the risk of failures.

• Examples include safety-critical systems in industries such as aerospace,
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Q2. Communication protocol
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Q1. Ask questions on what is written in CV
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Q2. About the Degree final year project
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Q1. Why are u looking for new opportunity
Ans. 
Seeking new challenges and growth opportunities in a dynamic environment.
• Looking to expand my skill set and knowledge in a different industry

• Seeking a more collaborative team environment

• Interested in working on cutting-edge technologies

• Want to take on more responsibilities and leadership roles
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Q2. What is salary expectation
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I am looking for a competitive salary based on my experience and skills.
• Research the average salary range for System Engineers in your area

• Consider your level of experience and any specialized skills you bring to the role

• Be prepared to negotiate based on the company's budget and benefits package
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Q1. Introduction of the candidate
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Q2. Previous work experience
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Q1. Thorough questioning on experience
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Q2. Experience of different building automation systems
Ans. 
I have experience working with various building automation systems, including but not limited to Siemens, Honeywell, and Johnson Controls.
• Experience with Siemens building automation systems

• Experience with Honeywell building automation systems

• Experience with Johnson Controls building automation systems
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