Cotmac Electronics System Engineer Interview Questions and Answers

Q1. Do you have scripting knowledge
Ans. 
Yes, I have scripting knowledge in languages like Bash, PowerShell, and Python.
• Proficient in Bash scripting for automation tasks

• Experience with PowerShell scripting for Windows administration

• Familiarity with Python scripting for system monitoring and management
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Q2. Can you tell how lvm works
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LVM (Logical Volume Manager) is a tool used in Linux to manage storage by creating logical volumes from physical volumes.
• LVM allows for dynamic resizing of logical volumes without needing to unmount the filesystem.

• It consists of physical volumes (PVs), volume groups (VGs), and logical volumes (LVs).

• PVs are physical storage devices like hard drives or partitions, VGs are a collection of PVs, and LVs are the virtual part...read more
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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
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Q2. What is salary expectation
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Profit loss percentage 50 mins

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
Ans. 
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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Aptitude questions aswell as core subjects

Q1. Based on core subjects and projects
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Q1. Regarding location
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It was based on core knowledge

Q1. What is you name
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Q1. Basic engineering, HW And SW
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Q1. PLC, DCS, Communication protocols
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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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