What is the main purpose of machining in workshop practice?
A Drilling
B Cutting
C Shaping
D Cleaning
Machining is primarily used for shaping or finishing a material to desired dimensions. It involves processes like turning, milling, and grinding to refine surfaces and achieve precise measurements. It differs from cutting, which is just one aspect of machining.
Which tool is commonly used for welding?
A Welder
B Lathe
C Hammer
D Grinder
A welder is the primary tool used for welding, which involves joining materials, typically metals, by melting them at high temperatures and fusing them together. A hammer, grinder, or lathe have different roles in the workshop and are not suitable for welding.
What is the purpose of casting in manufacturing?
A Shaping metal
B Cutting material
C Joining materials
D Molding material
Casting is a process where liquid material, usually metal, is poured into a mold to create a specific shape. It allows for the mass production of complex shapes that would be difficult or expensive to create using other methods, such as machining or forging.
In forging, what is the material typically subjected to?
A Pressure
B Heat
C Water
D Cold
Forging involves applying heat and pressure to a material to deform it into a specific shape. The heat makes the material more malleable, allowing it to be shaped under pressure. Cold forging is possible but less common in basic workshop practice.
What tool is used for drilling holes in materials?
A Welder
B Lathe
C Drill press
D Milling machine
A drill press is a specialized machine used to drill precise holes in materials. It is more accurate and efficient compared to handheld drills, especially for repetitive tasks in workshops. Milling machines and lathes are used for different machining processes.
Which machine is typically used for grinding?
A Grinder
B Milling machine
C Welder
D Lathe
A grinder is a machine used to smooth or finish a workpiece by abrasion. It uses abrasive wheels or belts to remove material and improve surface finish. Unlike lathes and milling machines, which are used for shaping, grinding focuses on surface quality.
Which of the following is a common hand tool used in workshop fitting?
A Hammer
B Screwdriver
C Wrench
D All of the above
All these tools (hammer, screwdriver, and wrench) are essential hand tools used in workshop fitting. A hammer is used for driving objects, screwdrivers for turning screws, and wrenches for tightening or loosening fasteners.
What does CNC stand for in machining?
A Controlled Numerical Calibration
B Centralized Numerical Control
C Computer Numerical Control
D Complete Numerical Control
CNC stands for Computer Numerical Control, which refers to automated machine tools that are controlled by computers. It enhances precision and repeatability in machining processes such as milling, turning, and drilling, making it a significant advancement in workshop practice.
Which measurement tool is used for precise internal measurements?
A Caliper
B Depth gauge
C Micrometer
D Vernier scale
A caliper, specifically an internal caliper, is used for measuring the internal dimensions of objects with high precision. A micrometer measures outer dimensions, while depth gauges and Vernier scales are for different types of measurements.
What is the main use of lathe machines?
A Drilling
B Turning
C Cutting
D Shaping
Lathe machines are mainly used for turning operations, where a workpiece is rotated while a cutting tool is applied to it, creating cylindrical shapes. This process is essential in shaping and sizing materials to create symmetrical objects.
Which of the following is used for threading operations?
A Hammer
B Drill
C Tap
D Grinder
Tapping is the process used for creating internal threads in a hole. A tap is the tool used for this purpose. Other tools like drills are for creating holes, grinders for surface finishing, and hammers for driving or shaping materials.
Which process is involved in heat treatment?
A Casting
B Forging
C Grinding
D Quenching
Quenching is a type of heat treatment process where a hot metal is rapidly cooled, usually in water or oil, to harden it. Heat treatment, in general, involves heating and cooling metals to alter their physical properties, improving strength and toughness.
What is the main advantage of surface finishing?
A Aesthetic
B Strength
C Smoothness
D Durability
Surface finishing refers to processes like polishing, grinding, and buffing that improve the smoothness and appearance of a workpiece. While it can also affect durability and aesthetic appeal, the primary purpose is to enhance the smoothness of the surface.
In welding, what material is typically used as filler?
A Plastic
B Electrode
C Copper
D Steel
In welding, the filler material is often provided by the electrode, which is used to join two pieces of metal together. The electrode melts and fills the gap between the metals being welded. Steel and copper can be involved, but electrodes are more common as filler materials.
What is the role of jigs and fixtures in machining?
A Support workpiece
B Shape material
C Cut material
D Heat material
Jigs and fixtures are used to support and hold the workpiece in place during machining processes, ensuring accuracy and repeatability. Jigs guide the tool, while fixtures securely hold the workpiece in the desired position, crucial for mass production or precise machining.