Staff Selection Commission (Southern Region) Junior Mining Engineer Interview Questions and Answers

Q1. What do you know about PCB ?
Ans. 
PCB stands for Printed Circuit Board, a board made of non-conductive material with conductive tracks for electronic components.
• PCB is used to mechanically support and electrically connect electronic components using conductive pathways.

• It is made of non-conductive material like fiberglass, with copper tracks to connect components.

• PCBs can be single-sided, double-sided, or multi-layered depending on the complexity of th...read more
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Q2. What is the active and passive components?
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Active components require a power source to operate, while passive components do not.
• Active components require an external power source to function, such as transistors and integrated circuits.

• Passive components do not require an external power source, such as resistors and capacitors.

• Active components can control the flow of electricity, while passive components simply store or dissipate energy.

• Examples of active comp...read more
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Q3. What is the difference between resistance and capacitor?
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Resistance is the opposition to the flow of current in a circuit, while a capacitor stores and releases electrical energy.
• Resistance limits the flow of current, while a capacitor stores and releases charge.

• Resistance is measured in ohms, while capacitance is measured in farads.

• Examples of resistors include carbon film resistors, while examples of capacitors include ceramic capacitors.

• Resistance dissipates energy in the...read more
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Q4. What do you know about SMT ?
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SMT stands for Surface Mount Technology, a method of electronic component assembly where components are mounted directly onto the surface of a printed circuit board (PCB).
• SMT components are smaller and lighter than through-hole components, allowing for higher component density on PCBs.

• SMT components are typically mounted using solder paste and reflow soldering techniques.

• SMT technology allows for automated assembly pro...read more
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Q1. What is the teransform
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are commonly used to step up or step down voltage levels in electrical systems.

• They consist of two coils of wire, known as the primary and secondary coils, wrapped around a core.

• The primary coil is connected to the input voltage source, while the secondary coil is connected to the outpu...read more
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Q2. What is the current
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Q3. What is the voltage
Ans. 
Voltage is the difference in electric potential between two points.
• Voltage is measured in volts (V).

• It represents the potential energy per unit charge.

• Voltage is the driving force that pushes electric current through a circuit.
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Q4. What is the ohm's low
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Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.
• Ohm's Law is represented by the formula V = IR, where V is the voltage, I is the current, and R is the resistance.

• It helps in calculating the current flowing through a circuit when the voltage and resistance are known, or determining the r...read more
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Q1. About previous company
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Q2. Experience discussion
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Q1. Electrical engineering related questions
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Q1. Tell me about yourself.
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Q1. What is the synchronisation process of plant ?
Ans. 
Synchronisation process of a plant involves matching the frequency, voltage, and phase angle of the incoming generator with the grid.
• Ensure the generator frequency matches the grid frequency (50Hz or 60Hz).

• Match the voltage levels of the generator with the grid.

• Adjust the phase angle of the generator to synchronize with the grid.

• Use synchronizing equipment like synchroscope or synchronizing lamps to ensure proper synch...read more
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Q2. Brief discussion about alternator and transformer protection system ?
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Alternator and transformer protection systems are essential for preventing damage and ensuring safe operation.
• Alternator protection systems typically include overcurrent, overvoltage, and reverse power protection to safeguard the alternator from damage.

• Transformer protection systems often involve differential protection, overcurrent protection, and temperature monitoring to prevent overheating and insulation breakdown.

• ...read more
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Q1. Positive things
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Q1. Still working here
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Q2. I still working here
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Q3. Yes thise want to question
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Q4. Yes this want Question
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Q1. What is the transformer
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Q2. What is ac supply and dc supply and what the difference
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Q3. What is the ac and dc motor
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Q4. What do you min by induction motor and asynchronous motor
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Q1. Where are you from
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Q2. How many member in your family
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Q1. Technical transform and circuit
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Q2. Current, voltage, resistant
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Q1. Electrical safety precautions
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