Toyota Tsusho Senior Electrical Technician Interview Questions and Answers

Q1. Electrical
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Q2. Electrical components
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Q1. Dual Stater and single line diagram starter and all electrical maintenance expirance 4 years experience
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Q2. Robot expert and press shoop expart and spm expart
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Q1. Write the starter control circuit with explain?
Ans. 
A starter control circuit is used to control the starting and stopping of an electric motor.
• The starter control circuit typically includes a start button, stop button, overload relay, and contactor.

• When the start button is pressed, it energizes the contactor which allows power to flow to the motor.

• The overload relay protects the motor from overheating by sensing the current drawn by the motor.

• The stop button breaks the...read more
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Q2. How to do id run test on vfd?
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To perform an id run test on a VFD, you need to follow specific steps to ensure the variable frequency drive is functioning correctly.
• Connect the VFD to a motor and power supply

• Set the VFD parameters according to the motor specifications

• Run the motor at different speeds to test the VFD's ability to control the motor

• Monitor the motor's performance and check for any abnormalities

• Record the test results for analysis and t
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Q1. Dol and star delta wiring scheme
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DOL (Direct-On-Line) and star delta are two different wiring schemes used in electrical engineering for starting induction motors.
• DOL wiring directly connects the motor to the power supply for starting, while star delta wiring initially starts the motor in star configuration and then switches to delta configuration for running.

• DOL wiring is simpler and cheaper but causes high starting current, while star delta wiring r...read more
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Q1. Explain about safety of conveyor bets and protection devices involved
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Conveyor belts require proper safety measures and protection devices to prevent accidents.
• Safety measures include emergency stop buttons, guards, and warning signs.

• Protection devices include sensors to detect jams or blockages, and automatic shut-off systems.

• Regular maintenance and inspections are necessary to ensure safety and prevent malfunctions.

• Training for employees on proper use and safety procedures is also impo...read more
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Q2. Explain about maintenance of the motor, transformers, VSD and panels
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Regular maintenance of motors, transformers, VSDs, and panels is crucial for their optimal performance and longevity.
• Inspect and clean motors and transformers regularly to prevent dust buildup and overheating

• Check VSDs for any signs of wear and tear, and replace faulty components as needed

• Perform routine inspections of panels to ensure proper wiring and connections

• Keep a record of maintenance activities and schedule re...read more
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Q1. How much salary is expected
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The expected salary for a Senior Electrical Technician depends on factors such as experience, location, and industry.
• The salary range for Senior Electrical Technicians can vary widely depending on the company and location.

• Experience plays a significant role in determining the expected salary. More experienced technicians can command higher salaries.

• The industry in which the technician works can also impact the salary. ...read more
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Q1. How many parts of sfc panels
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The number of parts in sfc panels varies depending on the specific panel and its design.
• The number of parts can range from a few to several hundred.

• Some common parts include solar cells, wiring, and protective coatings.

• The number of parts can also depend on the size and power output of the panel.

• Manufacturers may use different materials and designs, affecting the number of parts.

• It is important to consider the number a...read more
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Q2. How to slip-ring motor speed control
Ans. 
Slip-ring motor speed can be controlled by varying the resistance in the rotor circuit.
• Slip-ring motors have a wound rotor with external resistors.

• By changing the resistance in the rotor circuit, the speed can be controlled.

• This is done by adding or removing resistors from the rotor circuit.

• The speed can also be controlled by changing the voltage applied to the stator.

• This method is commonly used in industries where va...read more
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Q3. Add to external resistance
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Adding external resistance increases the total resistance in a circuit.
• External resistance can be added in series or parallel to the existing circuit.

• This can be useful in controlling the current flow and voltage drop in the circuit.

• For example, adding a resistor in series with an LED can limit the current flowing through it and prevent it from burning out.

• Similarly, adding a resistor in parallel with a component can r...read more
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Q4. Main parts of eot cranes
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Main parts of eot cranes include bridge, trolley, hoist, end trucks, runway beams, and electrical components.
• Bridge: main structure that spans the width of the bay

• Trolley: carries the hoist and moves horizontally along the bridge

• Hoist: lifts and lowers the load

• End trucks: located on either side of the bridge and house the wheels for movement

• Runway beams: support the crane and provide a path for the crane to travel alon...read more
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Q5. Why used slip-ring motor in eot cranes
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Slip-ring motors are used in EOT cranes for their ability to provide high starting torque and smooth acceleration.
• Slip-ring motors offer high starting torque, making them suitable for heavy loads in EOT cranes.

• They provide smooth acceleration, reducing wear and tear on the crane components.

• Slip-ring motors allow for speed control and reversing capabilities, important in crane operations.

• These motors are also able to ha...read more
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Math, reasoning, English and domain

Q1. What is transformer and working principles of transformer
Ans. 
A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.
• Transformers work on the principle of electromagnetic induction

• They have two coils, primary and secondary, wound around a common magnetic core

• When an alternating current flows through the primary coil, it creates a magnetic field which induces a voltage in the secondary coil

• The voltage in...read more
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Q2. What is motor working principles and testing of motor etc
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Motor working principles involve the interaction between magnetic fields and electric currents to produce rotational motion.
• Electric current is passed through a coil of wire, creating a magnetic field that interacts with the magnetic field of a permanent magnet to produce rotational force.

• The direction of the current determines the direction of the rotation.

• Motor testing involves measuring the motor's performance chara...read more
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