Cummins
Reliance Infrastructure Interview Questions and Answers
Q1. What is the working of generator?
A generator is a device that converts mechanical energy into electrical energy through electromagnetic induction.
Generators work on the principle of electromagnetic induction.
They consist of a coil of wire rotating in a magnetic field.
The rotation of the coil induces a current in the wire, producing electricity.
Generators are commonly used in power plants, wind turbines, and portable generators.
Different types of generators include AC generators and DC generators.
Q2. Differentiate b/w Diesel engine and petrol engine.
Diesel engines use compression ignition while petrol engines use spark ignition.
Diesel engines use compression ignition, while petrol engines use spark ignition.
Diesel engines are more fuel efficient than petrol engines.
Petrol engines are generally quieter than diesel engines.
Diesel engines produce more torque at lower RPMs compared to petrol engines.
Examples: Diesel engine - Cummins ISX, Petrol engine - Ford EcoBoost.
Q3. 2. State the 2nd law of thermodynamics
The 2nd law of thermodynamics states that the total entropy of an isolated system can never decrease over time.
Entropy in a closed system tends to increase over time
Heat will naturally flow from hot to cold objects
Efficiency of energy conversion processes is limited by the 2nd law
Q4. Reverse a string without using function
Reverse a string without using function
Iterate through the string from end to start and append each character to a new string
Use a temporary variable to swap characters at different positions in the string
Q5. Components of generator
Components of a generator include engine, alternator, fuel system, voltage regulator, cooling and exhaust system, and control panel.
Engine: provides power to the generator
Alternator: converts mechanical energy into electrical energy
Fuel system: supplies fuel to the engine
Voltage regulator: maintains a constant voltage output
Cooling and exhaust system: keeps the generator running at optimal temperature
Control panel: allows for monitoring and controlling the generator
Q6. Load path of power cylinder
The load path of a power cylinder refers to the route through which the force is transmitted from the power source to the load being moved.
The load path typically starts at the power source, such as a hydraulic pump or electric motor.
The force is then transmitted through the power cylinder, which converts the fluid or electrical energy into mechanical force.
Finally, the force is applied to the load being moved, such as a heavy object or machinery.
Examples of power cylinders i...read more
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