Pactron /HJPC PCB Designer Interview Questions and Answers

Q1. What is Circuit breaker and give real life example
Ans. 
A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by excess current.
• Circuit breakers automatically interrupt the flow of electricity when a fault is detected.

• They are commonly used in homes to protect electrical circuits from overloads or short circuits.

• A real life example of a circuit breaker is the one found in a circuit panel in a house, which trips when too much
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Q2. What is ohm's law
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, given a constant resistance.
• Ohm's law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.

• It is named after German physicist Georg Simon Ohm.

• It is commonly used in electrical engineering to calculate current, voltage, or resistance in a circuit.

• For example, if a circui...read more
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Normal genral aptitude questions are there
1.speed and time
2.permutation combination
3.percentage
4.profit loss
etc

Q1. Design a Xor gate using 4:1 mux?
Ans. 
Xor gate can be designed using 4:1 mux by selecting inputs based on control signals.
• Use 4:1 mux with two inputs as A and B, one input as A' and one input as B'.

• Connect A and B to select lines of mux.

• Connect A' and B' to the data inputs of mux.

• Set control signals such that when A=0, B=1 or A=1, B=0, the output is 1.

• When A=B=0 or A=B=1, the output should be 0.
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Q2. How to design full adder using half adder?
Ans. 
A full adder can be designed using two half adders and an OR gate.
• Use one half adder to add two of the three inputs (A and B)

• Use the second half adder to add the output of the first half adder with the third input (Cin)

• Use an OR gate to combine the carry outputs of both half adders to get the final carry out

• The sum output is the XOR of the outputs of both half adders
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Q1. Tell me about yourself?
Ans. 
I am a passionate and experienced Design Engineer with a strong background in mechanical engineering and a proven track record of delivering innovative solutions.
• I have a Bachelor's degree in Mechanical Engineering from XYZ University.

• I have worked for XYZ Company for 5 years, where I led a team in designing a new product that increased efficiency by 20%.

• I am proficient in CAD software such as SolidWorks and AutoCAD.

• I ...read more
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Q2. What are your hobbies?
Ans. 
My hobbies include woodworking, hiking, and playing the guitar.
• Woodworking: I enjoy creating furniture and small projects in my spare time.

• Hiking: I love exploring nature trails and challenging myself with new hikes.

• Playing the guitar: I find relaxation and creativity in playing music on my guitar.
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Q1. Only drawings Structural
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Q1. Architectural drawings test
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Q1. Basic electrical questions
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Q2. Explain Ohms law, basic current voltage
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it, with resistance as a constant factor.
• Ohm's law is expressed as V = IR, where V is voltage, I is current, and R is resistance.

• It can also be written as I = V/R or R = V/I.

• For example, if a circuit has a voltage of 12V and a resistance of 4 ohms, the current flowing through it would be 3A (12V/4ohms =
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Q1. Questions from CV
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Q2. They give some riddles to solve
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Q1. Scenario based act
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Q1. Basic communication check
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Q1. Basic HR questions such as tell me about yourself
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Q1. Basics electrical think
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Q1. Elevator releated questions if you are experienced.
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