Defence Research & Development Organisation Student Intern Interview Questions and Answers

The automobile body is the outer shell of a vehicle that encloses the mechanical components and provides protection to passengers.

• The automobile body is typically made of metal, plastic, or composite materials.

• It includes components such as doors, windows, roof, hood, and trunk.

• The body design can vary based on the type of vehicle, such as sedan, SUV, truck, or sports car.

• The body plays a crucial role in providing stru...read more

Machine elements are components or parts of a machine that perform specific functions.

• Fasteners (bolts, screws, nuts)

• Bearings (ball bearings, roller bearings)

• Gears (spur gears, helical gears)

• Shafts (drive shafts, crankshafts)

• Springs (compression springs, tension springs)

• Couplings (flexible couplings, rigid couplings)

Different types of engines include internal combustion engines, steam engines, and electric motors.

• Internal combustion engines: Powered by the combustion of fuel inside the engine, such as gasoline or diesel engines.

• Steam engines: Operate by using steam to produce mechanical work, commonly found in old locomotives and industrial settings.

• Electric motors: Convert electrical energy into mechanical energy, commonly used i

A jet engine is a type of propulsion system that generates thrust by expelling hot gases at high speeds.

• Uses the principle of Newton's third law of motion

• Consists of components like compressor, combustion chamber, turbine, and nozzle

• Examples include turbojet, turbofan, and turboprop engines

Different types of cycles include Carnot cycle, Rankine cycle, Otto cycle, and Brayton cycle.

• Carnot cycle: theoretical thermodynamic cycle involving reversible processes

• Rankine cycle: used in steam power plants to generate electricity

• Otto cycle: used in spark-ignition engines like gasoline engines

• Brayton cycle: used in gas turbine engines for power generation or propulsion