What is the primary function of milling in manufacturing?
A Drilling
B Shaping
C Grinding
D Cutting
Milling is a machining process that uses a rotating cutting tool to remove material from a workpiece. It is primarily used to shape flat surfaces, grooves, or intricate contours and can handle a variety of materials.
What does welding primarily involve?
A Forging and cooling
B Molding and pressing
C Cutting and shaping
D Heating and joining
Welding involves the application of heat to melt parts of a material, usually metal, to join them together. A filler material may also be used to enhance the strength of the joint, creating a permanent bond.
Which process is used for casting molten metal into molds?
A Turning
B Milling
C Casting
D Forging
Casting involves pouring molten metal into a mold to create a part. It is used for producing complex shapes that are difficult to achieve with machining and is commonly employed for producing large metal components.
What is the main purpose of turning in machining?
A Shaping cylindrical parts
B Drilling holes
C Grinding surfaces
D Cutting
Turning is a machining process where the workpiece is rotated while a stationary cutting tool removes material. It is ideal for shaping cylindrical or conical parts like shafts, rings, and pins with high precision.
Which process is primarily used to smooth or finish surfaces?
A Drilling
B Cutting
C Milling
D Grinding
Grinding is a finishing process that uses an abrasive wheel to remove material from the surface of a workpiece. It is used to achieve high surface quality, tight tolerances, and precise dimensions on parts.
What is the main advantage of CNC machining over manual machining?
A Lower cost
B Greater flexibility
C High precision
D Faster production
CNC machining offers high precision and repeatability. It is controlled by computer programs, which ensures that each part is made exactly to the specified dimensions, reducing human error and increasing productivity.
Which of the following is a primary use of die casting?
A Shaping metals
B Forging materials
C Drilling holes
D Cutting plastics
Die casting is a process where molten metal is injected into a mold under high pressure. It is commonly used to create detailed, high-precision parts in materials like aluminum, zinc, and magnesium.
What does powder metallurgy involve?
A Drilling and shaping
B Shaping with heat and pressure
C Shaping with molds
D Melting metals
Powder metallurgy involves compacting metal powders into a desired shape and then heating them to create solid parts. It is used to produce parts that are difficult to make through traditional machining, such as complex shapes with minimal material waste.
What is the key characteristic of sheet metal forming?
A Turning and shaping
B Cutting and shaping
C Pressing and bending
D Heating and melting
Sheet metal forming involves processes like bending, punching, and stamping, where thin metal sheets are shaped by applying pressure. It is used to create parts like automotive panels and structural components.
Which manufacturing process is typically used to create continuous shapes?
A Extrusion
B Drilling
C Milling
D Turning
Extrusion involves forcing material through a die to create continuous shapes with consistent cross sections. This process is commonly used for creating items like pipes, rods, and profiles from materials like metal, plastic, and rubber.
What is the main purpose of drilling in manufacturing?
A Forming complex shapes
B Shaping material
C Creating round holes
D Removing large amounts of material
Drilling is a machining process that uses a rotating drill bit to create round holes in a workpiece. It is widely used to create holes of varying diameters and depths in materials like metal, plastic, and wood.
What is the primary benefit of using jigs and fixtures?
A Increasing labor input
B Shaping materials
C Holding parts securely
D Reducing waste
Jigs and fixtures are tools used to hold workpieces in place during machining. They ensure accuracy and repeatability by precisely positioning parts for operations like drilling, milling, and turning, improving consistency and reducing errors.
What does the casting process primarily rely on?
A Cutting tools
B Molds and heat
C Abrasive material
D Pressure and force
Casting relies on melting material, typically metal, and pouring it into a mold. The material solidifies in the mold, taking its shape. This process is ideal for creating complex shapes and large components with fine details.
What is the main role of a CNC machine?
A Performing automated cutting
B Grinding material
C Mixing materials
D Shaping parts by hand
CNC machines automate the process of cutting and shaping materials. They are controlled by pre programmed computer software, allowing for high precision and repeatability in producing parts, which is crucial for mass production and complex designs.
What is the primary function of forging in manufacturing?
A Cutting and trimming
B Drilling holes
C Molding shapes
D Shaping by compressive force
Forging uses compressive forces, often with heat, to shape metal into desired forms. This process enhances the material’s strength and is commonly used for making durable parts, such as gears, crankshafts, and connecting rods.
