Mahindra & Mahindra Senior Electrical Engineer Interview Questions and Answers for Experienced

Q1. Transformers all parts
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Q2. Ht line lt and
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Q1. Electrical all equipment
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Q2. Stepup setpdown
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Q1. What is function of boost pressure sensor
Ans. 
The boost pressure sensor measures the pressure of the air entering the engine to ensure optimal performance.
• Measures pressure of air entering engine

• Helps ensure optimal engine performance

• Sends data to engine control unit for adjustments

• Commonly found in turbocharged engines
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Q2. What is function of crankshaft sensor
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The crankshaft sensor detects the position and speed of the crankshaft in an engine.
• Provides information to the engine control module to determine ignition timing and fuel injection timing

• Helps diagnose engine problems by detecting misfires and other issues

• Used in conjunction with the camshaft sensor to synchronize engine operation

• Examples of engines that use crankshaft sensors include gasoline and diesel engines
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Q3. Crankshaft sensor function is sensing the fly wheel rotation value rpm
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Q1. What is the can resistance of an electric bus 🚍 .
Ans. 
The can resistance of an electric bus varies depending on the specific model and components used.
• The can resistance of an electric bus can range from 0.1 ohms to 1 ohm.

• Factors such as the size of the bus, the type of batteries used, and the efficiency of the electric motors can all affect the can resistance.

• For example, a smaller electric bus with high-performance batteries and motors may have a lower can resistance co
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Q2. What is the full form BMS
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Building Management System
• BMS stands for Building Management System

• It is a computer-based control system installed in buildings to monitor and manage equipment such as HVAC, lighting, security, and more

• BMS helps in optimizing energy usage, improving comfort levels, and enhancing overall building efficiency
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Q3. How to connect HV battery to electric bus
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To connect HV battery to electric bus, follow safety protocols, identify positive and negative terminals, use appropriate cables and connectors, and ensure proper insulation.
• Ensure safety protocols are followed to prevent electric shock or short circuits

• Identify positive and negative terminals on both the HV battery and electric bus

• Use appropriate cables and connectors rated for high voltage

• Ensure proper insulation to ...read more
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Aptitude related questions

Q1. Wiring related
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Q2. Electrical maintenance type
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Electrical maintenance involves the regular inspection, testing, and repair of electrical systems to ensure they are functioning properly.
• Regularly inspecting electrical systems for signs of wear or damage

• Testing electrical equipment to ensure it is functioning correctly

• Repairing or replacing faulty components to prevent electrical failures

• Following safety protocols and regulations to prevent accidents

• Keeping detailed ...read more
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Q1. About your self
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Q2. Why are you hiring
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Q1. Define capacitor, how to work capacitor, define transistor and working principle, veriable frequency drive working principle
Ans. 
A capacitor is an electronic component that stores and releases electrical energy. A transistor is a semiconductor device that amplifies or switches electronic signals. A variable frequency drive is an electronic device that controls the speed of an electric motor.
• A capacitor is used to store and release electrical energy.

• It consists of two conductive plates separated by an insulating material called a dielectric.

• When ...read more
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Q1. How to change ac to dc current in dc motor,and how to work commutator,how many types dc machine and some explained in detail
Ans. 
To change AC to DC current in a DC motor, a rectifier is used. The commutator in a DC motor helps in converting the current direction.
• AC to DC conversion in a DC motor is achieved using a rectifier.

• The rectifier converts the alternating current (AC) into direct current (DC) by using diodes.

• The commutator in a DC motor is a rotary electrical switch that helps in reversing the direction of current flow in the armature wi...read more
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Q1. Basic knowledge of 3 phase induction motor
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Q2. Basic knowledge of electronic equipment
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Q1. Motor kitne prakar ke hote Hain
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Q2. 2 prakar ke 1 AC motor 2 DC motor
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