Sandvik Asia Junior Service Engineer Interview Questions and Answers

Q1. Plant Maintenance
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Q2. Plant inspection
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Q1. Technical questions related to your stream
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It is along with technical written

A topic they will given to us and we should talk it about 1 min

Q1. There two students sit each other back to back. One diagram will given one have to describe and another one have to draw hearing the describe & vice versa
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Q1. What id diode ?
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A diode is an electronic component that allows current to flow in one direction and blocks it in the opposite direction.
• Diodes are made of semiconductor materials, such as silicon or germanium.

• They have two terminals: an anode (positive terminal) and a cathode (negative terminal).

• When a diode is forward-biased, it allows current to flow through it.

• When a diode is reverse-biased, it blocks the current.

• Diodes are commonl...read more
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Q2. Draw the diagram of diode
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A diode is a two-terminal electronic component that allows current to flow in one direction and blocks it in the opposite direction.
• A diode has an anode and a cathode terminal.

• It is represented by a triangle with a line at the base.

• The arrowhead of the triangle points towards the cathode terminal.

• The line at the base represents the anode terminal.

• The symbol of a diode is often accompanied by its part number or label.
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Q3. Compare conductor insulator semiconductor
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Conductor, insulator, and semiconductor are materials with different electrical conductivity properties.
• Conductor: Materials that allow the flow of electric current easily. Examples: copper, aluminum.

• Insulator: Materials that do not allow the flow of electric current. Examples: rubber, glass.

• Semiconductor: Materials with intermediate conductivity. Examples: silicon, germanium.
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Q1. What is igbt and working
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IGBT stands for Insulated Gate Bipolar Transistor, a semiconductor device used for switching applications in power electronics.
• IGBT is a type of transistor that combines the high efficiency of a bipolar junction transistor (BJT) with the high input impedance of a MOSFET.

• It is commonly used in applications such as motor drives, inverters, and power supplies.

• IGBTs are used for high power applications due to their ability...read more
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Q2. What is ups and working
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Q1. Elevator related
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Q2. Regarding servicing of VFDs
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Q1. Identification of error
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By conducting thorough system analysis, testing, and utilizing diagnostic tools.
• Conduct thorough system analysis to understand the system's functionality and potential issues.

• Perform testing to identify any abnormalities or malfunctions in the system or equipment.

• Utilize diagnostic tools such as multimeters, oscilloscopes, and software programs to pinpoint errors.

• Review error logs and system documentation for clues on ...read more
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Q2. Repairing
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Q1. Which direction motor run
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The direction a motor runs depends on the type of motor and the wiring configuration.
• The direction of rotation can be determined by the motor's design and the direction of the current flow.

• Some motors can run in both clockwise and counterclockwise directions depending on the wiring.

• Reversing the polarity of the power supply can change the direction of rotation in some motors.
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Q2. How made delta connection in motor terminal box
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Delta connection in motor terminal box is made by connecting the three motor terminals in a triangular configuration.
• Connect the three motor terminals labeled U, V, and W in a triangular configuration.

• Ensure proper insulation and secure connections to prevent short circuits.

• Use appropriate tools and follow manufacturer's guidelines for wiring.

• Double check the connections before powering up the motor to avoid damage.

• Con...read more
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