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Johnson Controls
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The P-H chart is a graphical representation of the properties of refrigerants used in air conditioning systems.
The chart shows the relationship between pressure, enthalpy, and temperature of the refrigerant.
It helps in selecting the right refrigerant for a particular application.
It also helps in troubleshooting air conditioning systems.
The chart is used to determine the state of the refrigerant (saturated liquid, satur...
Subcool and superheat are terms used in refrigeration and air conditioning to describe the state of refrigerant in a system.
Subcool refers to the temperature of a liquid refrigerant that is below its boiling point.
Superheat refers to the temperature of a vapor refrigerant that is above its boiling point.
Subcooling and superheating are important for ensuring the proper functioning of a refrigeration or air conditioning ...
Scroll compressor uses two interleaved spiral scrolls to compress air or refrigerant.
Scroll compressor has fewer moving parts and is more efficient than traditional compressors.
The scrolls are made of a durable material like aluminum or steel.
The scrolls rotate in opposite directions, creating pockets of air or refrigerant that are compressed as they move towards the center.
Scroll compressors are commonly used in air c...
REF protection is a type of protection used in electrical systems to detect faults and prevent damage.
REF protection stands for Restricted Earth Fault protection.
It is used to detect earth faults in electrical systems by comparing the currents flowing in the phase and neutral conductors.
If a fault is detected, the protection system will trip the circuit to prevent damage to equipment and ensure safety.
REF protection is...
To test a breaker, you can perform a visual inspection, check for continuity, test the voltage, and simulate overload conditions.
Perform a visual inspection to check for any physical damage or signs of wear
Check for continuity by using a multimeter to ensure the breaker is functioning properly
Test the voltage by applying the rated voltage to the breaker and verifying it trips at the correct threshold
Simulate overload c...
I would like to join Siemens because of its reputation for innovation, global presence, and opportunities for professional growth.
Siemens is known for its cutting-edge technology and innovation in various industries.
I am impressed by Siemens' global presence and the opportunity to work on projects around the world.
I believe Siemens offers great opportunities for professional growth and development.
I am excited about th...
posted on 14 Jan 2024
I applied via campus placement at GH Raisoni College of Engineering, Nagpur
It was MCQ + coding round
posted on 4 Mar 2024
I was interviewed in Feb 2024.
It is a best experience
Control systems are used to manage, regulate, and control the behavior of other devices or systems.
Control systems use feedback loops to monitor and adjust the output of a system to meet desired goals.
Examples of control systems include thermostats in HVAC systems, cruise control in cars, and autopilot in aircraft.
There are two main types of control systems: open-loop and closed-loop (feedback) systems.
Control systems ...
Tough but pretty conceptual questions
posted on 14 Oct 2022
I applied via Referral and was interviewed in Sep 2022. There were 4 interview rounds.
I applied via Recruitment Consulltant and was interviewed before Oct 2022. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Aug 2022. There was 1 interview round.
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