Machine Drawing

What is orthographic projection and why is it used in machine drawing?

• Orthographic projection is used to add color and texture to the drawing

• Orthographic projection is used to show the object in motion

• Orthographic projection is used to accurately depict the size and shape of the object from different views.

• Orthographic projection is used to create 3D models of the object

Explain the difference between first angle projection and third angle projection.

• First angle projection is a 2D drawing method, while third angle projection is a 3D drawing method.

• First angle projection is used for small objects, while third angle projection is used for large objects.

• First angle projection is commonly used in Europe and Asia, while third angle projection is commonly used in North America.

• First angle projection is commonly used in North America, while third angle projection is commonly used in Europe and Asia.

What is a sectional view and when is it used in machine drawing?

• A sectional view is a view that shows an object as it would appear if cut by a parallel plane

• A sectional view is a view that shows an object as it would appear if cut by an intersecting plane. It is used in machine drawing to show the internal details of the object.

• A sectional view is used in machine drawing to show the external details of the object

• A sectional view is a view that shows an object from a distance

Describe the purpose of geometric dimensioning and tolerancing (GD&T) in machine drawing.

• To add decorative elements to the drawing

• To make the drawing more colorful and visually appealing

• To confuse the machinist and make the drawing difficult to interpret

• To define the nominal geometry of parts and ensure proper fit and function of mechanical components.

What are the different types of tolerances used in GD&T?

• Bilateral, unilateral, and limit tolerances

• Internal, external, and nominal tolerances

• Standard, premium, and custom tolerances

• Absolute, relative, and positional tolerances

Explain the importance of assembly drawings in the manufacturing process.

• Assembly drawings are important as they provide detailed information about how different parts fit together to form a complete product, ensuring accurate and efficient manufacturing process.

• Assembly drawings are not important in the manufacturing process

• Manufacturing can be done without assembly drawings

• Assembly drawings only add complexity to the manufacturing process

What information is typically included in an assembly drawing?

• Assembly technician's name, favorite food, shoe size

• Part numbers, dimensions, materials, and assembly instructions

• Color of the parts, manufacturer's address, weight

• Date of production, serial numbers, customer's contact information

When are detail drawings used in machine drawing?

• To show the machine in operation

• To provide information about the manufacturing process

• To create a rough sketch of the entire machine

• To provide specific information about individual parts or components

What are the key components of a detail drawing?

• Title block, revision block, notes, bill of materials, and views of the part from different angles

• Serial number, manufacturing date, expiration date

• Ingredients, cooking instructions, serving suggestions

• Color palette, font style, paper size

How are auxiliary views helpful in machine drawing?

• They are only used for decorative purposes

• They provide additional information about the object

• They make the drawing more confusing

• They are not useful in machine drawing