Johnson Controls Senior Technician Interview Questions and Answers

40 min

Q1. Why you want to join Rockwell
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Q1. What is the VFD
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Q2. What is the role of an Online Learning Resource (OLR)?
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Q1. What is the rccb
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Q2. Which place use star delta connection
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Q1. What is current
Ans. 
Current is the flow of electric charge in a circuit.
• Current is measured in Amperes (A)

• It is the rate of flow of electric charge through a conductor

• Current can be either direct current (DC) or alternating current (AC)

• In a series circuit, the current remains the same throughout

• Ohm's Law relates current, voltage, and resistance: I = V/R
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Q2. What is voltage
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Voltage is the difference in electric potential between two points in a circuit, measured in volts.
• Voltage is the force that pushes electric current through a circuit

• It is measured in volts (V)

• Voltage is the potential difference between two points in a circuit

• Higher voltage means more potential energy available to move electrons

• Voltage can be DC (direct current) or AC (alternating current)
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Q3. What is vcb full form
Ans. 
VCB full form is Vacuum Circuit Breaker.
• VCB stands for Vacuum Circuit Breaker.

• It is a type of circuit breaker that uses a vacuum to extinguish the arc when the contacts open.

• VCBs are commonly used in medium voltage applications.

• They are more reliable and require less maintenance compared to other types of circuit breakers.
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Q4. What is mcb full form
Ans. 
MCB full form is Miniature Circuit Breaker.
• MCB stands for Miniature Circuit Breaker.

• It is an electromechanical device that protects an electrical circuit from overcurrent.

• MCBs automatically switch off electrical circuits during abnormal conditions.

• They are commonly used in residential and commercial buildings for electrical safety.

• Examples of MCB brands include Schneider Electric, Siemens, and Legrand.
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Q5. What is transform
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, allowing for the transfer of electrical energy.

• Tra...read more
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Q1. Everything Question I'm comfortable
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40 min

Q1. Why you want to join Rockwell
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Q1. To find hardness materials in UTMBy applying loads
Ans. 
Hardness of materials can be found in UTM by applying loads.
• Universal Testing Machine (UTM) is used to measure the hardness of materials.

• The load is applied to the material and the depth of the indentation is measured.

• The hardness value is calculated using the load and the area of the indentation.

• Different types of tests can be performed to measure hardness, such as Brinell, Vickers, and Rockwell tests.
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