What is the primary function of turning in workshop practice?
A Drilling holes
B Cutting material
C Shaping cylindrical parts
D Polishing surfaces
Turning is the process of rotating a workpiece on a lathe while a cutting tool is applied to shape it. This operation is used to create cylindrical and symmetrical parts, making it a key operation in machining.
Which tool is primarily used for accurate internal measurements?
A Inside gauge
B Caliper
C Micrometer
D Vernier
An inside gauge is designed specifically for measuring internal dimensions, such as the internal diameter of a hole. It provides highly accurate measurements, unlike other tools that measure external dimensions, such as micrometers or calipers.
What does a lathe machine primarily do?
A Cut threads
B Weld parts
C Shape flat surfaces
D Turn workpieces
A lathe machine is primarily used for turning operations, where a workpiece is rotated while a cutting tool shapes it. This is ideal for creating cylindrical parts, such as shafts and pipes, which is different from cutting or welding processes.
What is the main purpose of a cutting tool in machining?
A Measure dimensions
B Cool the tool
C Remove material
D Support the workpiece
Cutting tools are designed to remove material from a workpiece to shape or finish it. They work by scraping, shearing, or slicing off material to achieve the desired dimensions and surface finish. They are essential in processes like turning, milling, and drilling.
What is the primary use of a fitting operation in workshop practice?
A Drilling holes
B Assembling parts
C Shaping metal
D Cutting metal
Fitting is the process of assembling parts in mechanical engineering. It involves adjusting the dimensions of components to ensure they fit together properly. Unlike cutting or shaping, fitting focuses on the accurate assembly of parts for further processes.
What is a common method of sharpening cutting tools?
A Grinding
B Drilling
C Polishing
D Welding
Grinding is commonly used to sharpen cutting tools. The abrasive wheel removes material from the tool to restore its cutting edge. This process is essential to maintaining the tool’s effectiveness, especially after it becomes dull from use.
Which machine tool is used to remove material from a workpiece using a rotating cutter?
A Surface grinder
B Lathe
C Milling machine
D Drill press
A milling machine uses a rotating cutter to remove material from a workpiece. It is used for creating flat surfaces, slots, or complex shapes. Unlike the lathe, which rotates the workpiece, milling machines rotate the tool to perform material removal.
What does the term “facing” refer to in turning operations?
A Cutting grooves
B Shaping external surfaces
C Smoothing internal surfaces
D Cutting threads
Facing is a turning operation used to shape the external surface of a workpiece by cutting off excess material to create a flat, smooth surface. This is a common operation to prepare the workpiece for further processes.
What is the purpose of a chuck in lathe operations?
A To cool the tool
B To hold the cutting tool
C To measure dimensions
D To hold the workpiece
A chuck is a clamping device used on a lathe to securely hold the workpiece during turning operations. It ensures the workpiece is rotated accurately, allowing for precise cutting and shaping. The cutting tool is held separately.
Which cutting tool is used for creating threads on a lathe machine?
A Taper tool
B Drill bit
C Threading tool
D End mill
A threading tool is specifically designed to cut threads on a lathe machine. It uses a helical motion to create threads, which are essential for screw and bolt production. Other tools, like drills and end mills, are used for different operations.
What does a CNC lathe machine use to control operations?
A Computer programming
B Mechanical gears
C Hand tools
D Manual input
CNC (Computer Numerical Control) lathe machines use computer programming to control the machining operations. This allows for higher precision, repeatability, and efficiency in producing parts. It replaces manual control methods, improving productivity and accuracy.
Which process is used to produce cylindrical shapes from metal?
A Milling
B Casting
C Turning
D Drilling
Turning is the process used to produce cylindrical shapes by rotating a workpiece while a cutting tool removes material. This operation is typically performed on a lathe machine, which is ideal for producing symmetrical and precise cylindrical parts.
What is the function of a tool post in a lathe machine?
A To cool the tool
B To hold the cutting tool
C To measure workpiece dimensions
D To rotate the workpiece
A tool post is used to hold the cutting tool in place during lathe operations. It is mounted on the carriage and provides the necessary stability for precise material removal. The workpiece is held separately in a chuck.
What is the primary function of a lathe carriage?
A To move the tool
B To measure dimensions
C To rotate the workpiece
D To hold the cutting tool
The carriage on a lathe machine is used to move the cutting tool along the workpiece. This movement is crucial for shaping and cutting the material. The chuck holds the workpiece while the carriage moves the tool to the desired position.
What is the typical use of a file in workshop practice?
A Cutting material
B Sharpening tools
C Drilling holes
D Finishing surfaces
A file is used to finish and smooth surfaces in workshop practice. It removes small amounts of material to improve the texture and shape of a workpiece. Files are commonly used after machining to refine edges and surfaces.