10+ BONGCHIE INDIA Interview Questions and Answers

There are numerous materials used in engineering, each with unique properties and applications.

• Metals: strong and durable, used in construction and machinery

• Polymers: lightweight and flexible, used in packaging and consumer goods

• Ceramics: heat-resistant and hard, used in electronics and construction

• Composites: combination of materials, used in aerospace and sports equipment

• Why we use them in specific: based on their properties and intended application

• For example, metals are u...read more

Welding joins two metal pieces by melting them together, brazing joins them with a filler metal at lower temperatures, and soldering joins them with an even lower melting point filler metal.

• Welding involves melting the base metals and adding a filler material to create a strong joint, typically at high temperatures.

• Brazing uses a filler metal with a melting point above 450°C but below the melting point of the base metals being joined.

• Soldering joins metals with a filler mater...read more

To draw 3rd angle & 1st angle view, first understand the projection theory and then follow the conventions of each angle view.

• Understand the projection theory and conventions of each angle view

• Use proper scale and dimensions

• Label all the important features

• Show hidden lines and surfaces

• Use appropriate line types and thickness

• Check for accuracy and completeness

• Revise and refine the drawing as needed

RPM can be changed by adjusting the speed of the motor or by using a gearbox.

• Adjust the voltage or frequency of the power supply to the motor

• Use a variable frequency drive to control the motor speed

• Use a gearbox to change the speed of the output shaft

• Change the size of the pulleys or gears in the system

• Use a different motor with a different speed rating

First angle and third angle symbols are used in engineering drawings to indicate the orientation of the views.

• First angle projection is commonly used in Europe and Asia, where the top view is placed below the front view.

• Third angle projection is commonly used in North America, where the top view is placed above the front view.

• The symbol for first angle projection is a triangle with the number 1 inside, while the symbol for third angle projection is a triangle with the number ...read more

Gears can be made of various materials depending on the application and requirements.

• Common materials include steel, cast iron, bronze, and plastic.

• Steel gears are strong and durable, but can be noisy.

• Cast iron gears are also strong and durable, but are quieter than steel.

• Bronze gears are used in applications where low noise and high strength are required.

• Plastic gears are lightweight and can be used in applications where low noise and low cost are important.

• The choice of mat...read more

Four common heat treatment processes are annealing, quenching, tempering, and normalizing.

• Annealing involves heating the material to a specific temperature and then slowly cooling it to relieve internal stresses and increase ductility.

• Quenching is a rapid cooling process used to harden materials by forming a martensitic structure.

• Tempering is a heat treatment process that involves reheating the quenched material to a specific temperature to reduce brittleness and increase tou...read more

Types of gears include spur, helical, bevel, worm, rack and pinion. Types of bearings include ball, roller, plain, and fluid bearings.

• Types of gears: spur, helical, bevel, worm, rack and pinion

• Types of bearings: ball, roller, plain, fluid

ID refers to internal diameter, while OD refers to outer diameter in cylindrical objects.

• ID (Internal Diameter): The measurement of the inner space of a hollow cylinder.

• OD (Outer Diameter): The measurement of the outer edge of a cylinder.

• Example: A pipe with an ID of 2 inches and an OD of 3 inches.

• ID is crucial for determining flow rates in piping systems.

• OD is important for fitting and compatibility with other components.