Wipeout for masking in AutoCAD - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the Wipeout command in AutoCAD?

The Wipeout command creates a polygonal area that masks underlying objects, making them invisible without deleting them. It helps to clean up drawings by hiding parts that are not needed visually.

beginner

How does a Wipeout differ from simply erasing objects in AutoCAD?

A Wipeout hides objects beneath it without deleting them, so the original objects remain in the drawing and can be revealed later. Erasing removes objects permanently.

intermediate

Which AutoCAD feature allows you to create a Wipeout that follows the shape of an existing object?

You can create a Wipeout by selecting the 'Polyline' option and then picking an existing closed polyline or object to trace its shape for masking.

intermediate

Can Wipeouts be edited after creation? If yes, how?

Yes, Wipeouts can be edited by selecting their boundary grips to reshape or move them. You can also use commands like 'PEDIT' if the boundary is a polyline.

beginner

What is a common use case for Wipeout in technical drawings?

Wipeouts are often used to mask overlapping lines or text to improve clarity, such as hiding parts of complex linework behind labels or symbols.

What does the Wipeout command do in AutoCAD?

A Deletes objects permanently

B Masks parts of the drawing without deleting them

C Changes object colors

D Creates 3D models

Wipeout masks parts of the drawing by creating a polygonal area that hides objects beneath it without deleting them.

How can you create a Wipeout that matches an existing shape?

A By tracing a polyline or closed object

B By using the Erase command

C By changing layer properties

D By using the Hatch command

You can create a Wipeout by selecting the polyline option and picking an existing closed shape to mask.

Which of these is NOT true about Wipeouts?

A They improve drawing clarity

B They hide objects visually

C They can be edited after creation

D They permanently delete objects

Wipeouts do not delete objects; they only hide them visually.

What is a typical use of Wipeout in a technical drawing?

A Creating dimension lines

B Adding color fills

C Masking overlapping lines or text

D Generating 3D views

Wipeouts are commonly used to mask overlapping lines or text to keep drawings clear.

Can you move or reshape a Wipeout after creating it?

A Yes, by editing its boundary grips

B No, it is fixed once created

C Only by deleting and recreating

D Only by changing layer visibility

Wipeouts can be moved or reshaped by selecting and editing their boundary grips.

Explain how the Wipeout command helps in managing complex drawings.

Think about hiding parts of a drawing without losing data.

Describe the difference between erasing objects and using Wipeout for masking.

Consider what happens to the objects after each action.

Practice

1. What is the main purpose of using Wipeout in AutoCAD drawings?

easy

A. To create 3D models from 2D drawings

B. To permanently erase objects from the drawing

C. To change the color of objects

D. To mask parts of a drawing without deleting them

Solution

1. Step 1: Understand Wipeout functionality and compare options

   Wipeout masks or hides parts of a drawing but does not delete the objects underneath. Only To mask parts of a drawing without deleting them correctly describes masking without deletion; others describe different functions.

2. Final Answer:

   To mask parts of a drawing without deleting them -> Option D

3. Quick Check:

   Wipeout = Masking without deletion [OK]

Hint: Remember: Wipeout hides, does not erase [OK]

Common Mistakes:

• Confusing wipeout with erase command
• Thinking wipeout changes object color
• Assuming wipeout creates 3D models

2. Which of the following is the correct way to create a wipeout in AutoCAD?

easy

A. Use the WIPEOUT command and select an existing polyline or draw a new boundary

B. Use the ERASE command on the objects to hide

C. Use the HATCH command with a solid fill

D. Use the LINE command to draw over objects

Solution

1. Step 1: Recall wipeout creation method and evaluate other options

   The WIPEOUT command allows creating a masking area by selecting or drawing a boundary. ERASE deletes objects, HATCH fills areas but doesn't mask, and LINE just draws lines.

2. Final Answer:

   Use the WIPEOUT command and select an existing polyline or draw a new boundary -> Option A

3. Quick Check:

   WIPEOUT command = Create mask [OK]

Hint: Use WIPEOUT command, not ERASE or HATCH [OK]

Common Mistakes:

• Trying to erase objects instead of masking
• Using hatch instead of wipeout for masking
• Drawing lines over objects thinking it hides them

3. Given a drawing with overlapping objects, what will be the visible result after applying a wipeout with a closed polyline boundary over the top objects?

medium

A. The objects under the wipeout boundary will be hidden but still exist

B. All objects inside the boundary will be deleted permanently

C. The wipeout boundary will change the color of objects inside it

D. The wipeout will convert objects inside the boundary to a block

Solution

1. Step 1: Understand wipeout effect on objects and analyze options

   Wipeout hides objects under its boundary but does not delete or alter them. Only The objects under the wipeout boundary will be hidden but still exist correctly states objects are hidden but remain; others describe deletion or changes which do not happen.

2. Final Answer:

   The objects under the wipeout boundary will be hidden but still exist -> Option A

3. Quick Check:

   Wipeout hides objects, does not delete [OK]

Hint: Wipeout hides, does not delete objects [OK]

Common Mistakes:

• Assuming wipeout deletes objects
• Thinking wipeout changes object properties
• Believing wipeout converts objects to blocks

4. You created a wipeout but it is not hiding the objects underneath. What is the most likely cause?

medium

A. The wipeout boundary is not a closed polyline

B. The objects are locked and cannot be hidden

C. The wipeout frame is turned off or frozen

D. The wipeout command was not run with administrative rights

Solution

1. Step 1: Check wipeout frame visibility and evaluate other causes

   If the wipeout frame is off or frozen, the mask effect may not display properly. Objects being locked does not prevent hiding; boundary shape matters but wipeout can create boundaries; admin rights are unrelated.

2. Final Answer:

   The wipeout frame is turned off or frozen -> Option C

3. Quick Check:

   Frame visibility affects wipeout masking [OK]

Hint: Check wipeout frame visibility if masking fails [OK]

Common Mistakes:

• Assuming locked objects prevent masking
• Ignoring wipeout frame visibility
• Thinking admin rights affect wipeout

5. You want to mask a complex area in your drawing that has multiple overlapping objects and irregular shapes. Which approach using wipeout will give you the cleanest result?

hard

A. Draw solid hatch patterns over the objects to mask them

B. Create a single closed polyline that outlines the entire area and use it as the wipeout boundary

C. Use the erase command on all objects inside the area

D. Create multiple small wipeouts for each object separately

Solution

1. Step 1: Consider masking efficiency and compare alternatives

   A single closed polyline wipeout covers the entire area cleanly without gaps or overlaps. Multiple small wipeouts can cause overlaps and complexity; erase deletes objects; hatch does not mask underlying objects.

2. Final Answer:

   Create a single closed polyline that outlines the entire area and use it as the wipeout boundary -> Option B

3. Quick Check:

   Single closed polyline = clean mask [OK]

Hint: Use one closed polyline for complex area masking [OK]

Common Mistakes:

• Using many small wipeouts causing clutter
• Erasing objects instead of masking
• Using hatch which doesn't hide objects