What is the primary purpose of machining in manufacturing?
A Cutting
B Shaping
C Casting
D Joining
Machining is used primarily to shape a material into a desired form by removing material. This can include processes like turning, milling, and drilling, which help to create precise dimensions and surface finishes.
Which of the following processes involves the melting of metal to form a desired shape?
A Welding
B Turning
C Casting
D Forging
Casting is a manufacturing process where a metal is melted and poured into a mold to create a desired shape. It is commonly used for producing complex shapes and large-scale components.
What does the term “milling” refer to in machining?
A Drilling
B Grinding
C Shaping
D Cutting
Milling is a machining process where a rotating cutting tool removes material from a workpiece. It is used to create flat surfaces, grooves, and intricate shapes.
Which manufacturing process is used to create parts by heating and shaping materials without removing material?
A Forging
B Casting
C Grinding
D Welding
Forging is a process where metal is heated and shaped by compressive forces, typically using hammers or presses. It improves the material’s strength by aligning its grain structure.
What is the primary goal of surface finishing in manufacturing?
A Joining
B Cooling
C Improving appearance
D Strengthening
Surface finishing refers to processes like polishing, grinding, or coating to improve the surface quality of a part. This enhances both its appearance and its resistance to wear and corrosion.
What is CNC machining used for?
A Welding
B Automation
C Grinding
D Cutting
CNC (Computer Numerical Control) machining is used for automated cutting and shaping of materials, providing high precision and repeatability. It controls tools like lathes, mills, and routers using computer programs.
Which manufacturing process is specifically designed for producing parts with high strength by compressing metal?
A Welding
B Casting
C Forging
D Milling
Forging involves applying pressure to shape metal, enhancing its strength through grain flow. It is particularly effective for parts that need to withstand heavy loads and stress.
What does additive manufacturing involve?
A Layering
B Welding
C Casting
D Cutting
Additive manufacturing, or 3D printing, builds objects by adding material layer by layer. It is used for creating complex shapes and prototypes directly from digital models without traditional molds or tools.
What is the main purpose of heat treatment in manufacturing?
A Joining
B Cooling
C Strengthening
D Shaping
Heat treatment involves heating and cooling materials (usually metals) to alter their properties, such as hardness, toughness, and ductility, without changing the material’s shape.
Which of these processes involves the removal of material through mechanical force?
A Welding
B Turning
C Casting
D Molding
Turning is a machining process where a rotating workpiece is shaped by a stationary cutting tool. This process removes material to create cylindrical parts or round profiles.
What is the role of jigs and fixtures in manufacturing?
A Cooling
B Cutting
C Joining
D Positioning
Jigs and fixtures are tools used to hold and position a workpiece during machining processes. They ensure accuracy and repeatability by fixing the workpiece in a precise location.
What type of process is used to form shapes by applying pressure to a material, typically metal?
A Forging
B Casting
C Molding
D Grinding
Forging uses compressive forces to shape metal into a desired form. The process increases the strength of the material by aligning its grains and making it more resilient to stress.
In which manufacturing process are materials melted and injected into a mold to create parts?
A Forging
B Extrusion
C Casting
D Molding
In casting, materials (usually metals) are heated until they melt, then poured into molds to form specific shapes. It is widely used for producing complex components.
Which of the following is the main benefit of lean manufacturing?
A Reducing costs
B Increasing output
C Adding complexity
D Improving material properties
Lean manufacturing focuses on minimizing waste, improving efficiency, and reducing production costs by streamlining processes and using resources more effectively.
What is the function of drilling in machining?
A Forming
B Cutting
C Boring
D Shaping
Drilling is a machining process that uses a rotating drill bit to create round holes in a workpiece. It is widely used in various industries for producing holes of different sizes and depths.