ARRAY (rectangular and polar) in AutoCAD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a rectangular array with 3 rows.

AutoCAD

ARRAYRECT LENGTH 4 [1] 3

Drag options to blanks, or click blank then click option'

AANGLE

BCOLUMNS

CROWS

DLENGTH

Attempts:

3 left

💡 Hint

Common Mistakes

Using COLUMNS instead of ROWS

Confusing LENGTH with ROWS

The ROWS parameter specifies how many rows the rectangular array will have.

2fill in blank

medium

Complete the code to set the angle between items in a polar array to 45 degrees.

AutoCAD

ARRAYPOLAR CENTER_POINT 8 [1]

Drag options to blanks, or click blank then click option'

ACOLUMNS

BRADIUS

CROWS

DANGLE

Attempts:

3 left

💡 Hint

Common Mistakes

Using RADIUS instead of ANGLE

Confusing ROWS or COLUMNS with angle

The ANGLE parameter defines the angle between items in a polar array.

3fill in blank

hard

Fix the error in the rectangular array code by choosing the correct parameter for the number of columns.

AutoCAD

ARRAYRECT LENGTH [1] 3 2

Drag options to blanks, or click blank then click option'

ACOLUMNS

BROWS

CANGLE

DRADIUS

Attempts:

3 left

💡 Hint

Common Mistakes

Using ROWS instead of COLUMNS

Using ANGLE or RADIUS in rectangular array

The second parameter in a rectangular array is the number of COLUMNS.

4fill in blank

hard

Fill both blanks to create a polar array with 12 items and a radius of 5 units.

AutoCAD

ARRAYPOLAR CENTER_POINT [1] [2]

Drag options to blanks, or click blank then click option'

A12

B5

CANGLE

DRADIUS

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping radius and number of items

Using ANGLE instead of radius

The first blank is the number of items (12), the second blank is the radius (5 units).

5fill in blank

hard

Fill all three blanks to create a rectangular array with 4 columns, 3 rows, and spacing of 2 units.

AutoCAD

ARRAYRECT LENGTH [1] [2] [3]

Drag options to blanks, or click blank then click option'

A4

B3

C2

DANGLE

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up rows and columns

Using ANGLE instead of spacing

The blanks represent columns (4), rows (3), and spacing (2 units) respectively.

Practice

1. What does the ARRAYRECT command do in AutoCAD?

easy

A. Deletes selected objects from the drawing.

B. Arranges objects in a circular pattern.

C. Creates rows and columns of copies of selected objects.

D. Scales objects uniformly.

Solution

1. Step 1: Understand the purpose of ARRAYRECT

   The ARRAYRECT command is used to create a rectangular array, which means making copies of objects arranged in rows and columns.

2. Step 2: Compare with other array types

   ARRAYPOLAR arranges objects in a circle, so it is not the correct answer here.

3. Final Answer:

   Creates rows and columns of copies of selected objects. -> Option C

4. Quick Check:

   ARRAYRECT = Rows and columns [OK]

Hint: RECT = Rows and Columns layout [OK]

Common Mistakes:

• Confusing ARRAYRECT with ARRAYPOLAR
• Thinking ARRAYRECT deletes objects
• Assuming ARRAYRECT scales objects

2. Which of the following is the correct syntax to create a polar array of 6 items in AutoCAD?

easy

A. ARRAYPOLAR 6

B. ARRAYPOLAR OBJECT 6

C. ARRAYPOLAR OBJECTS 6

D. ARRAYPOLAR 360 6

Solution

1. Step 1: Recall basic ARRAYPOLAR syntax

   The basic command to create a polar array with a specified number of items is ARRAYPOLAR 6, where 6 is the number of copies.

2. Step 2: Identify incorrect syntax

   Syntax with unnecessary words like OBJECT or OBJECTS is invalid. ARRAYPOLAR 360 6 adds 360 which is not required in this simple syntax.

3. Final Answer:

   <code>ARRAYPOLAR 6</code> -> Option A

4. Quick Check:

   ARRAYPOLAR + number = correct syntax [OK]

Hint: ARRAYPOLAR + number of items is enough [OK]

Common Mistakes:

• Adding extra words like OBJECT or OBJECTS
• Including angles unnecessarily
• Using wrong command names

3. Given a rectangular array with 3 rows and 4 columns, how many total copies of the object will be created (including the original)?

medium

A. 15

B. 7

C. 11

D. 12

Solution

1. Step 1: Calculate total items in rectangular array

   A rectangular array with 3 rows and 4 columns creates 3 x 4 = 12 total items.

2. Step 2: Include the original object

   The original object is included in the count, so total copies including original is 12.

3. Final Answer:

   12 -> Option D

4. Quick Check:

   3 rows x 4 columns = 12 [OK]

Hint: Multiply rows by columns for total items [OK]

Common Mistakes:

• Subtracting 1 for original object
• Adding rows and columns instead of multiplying
• Confusing rows with columns

4. You tried to create a polar array but the copies overlap at the center. What is the most likely cause?

medium

A. The angle between items is set to 0 degrees.

B. The number of items is too high.

C. The base point is outside the circle.

D. The original object is too large.

Solution

1. Step 1: Understand polar array spacing

   In a polar array, copies are spaced evenly around a circle by an angle. If the angle is 0 degrees, all copies overlap at the center.

2. Step 2: Analyze other options

   Too many items or large objects may cause crowding but not exact overlap. Base point outside circle affects placement but not overlap at center.

3. Final Answer:

   The angle between items is set to 0 degrees. -> Option A

4. Quick Check:

   Angle 0° causes overlap [OK]

Hint: Check angle between items is not zero [OK]

Common Mistakes:

• Ignoring angle setting
• Blaming object size only
• Misunderstanding base point role

5. You want to create a polar array of 8 copies evenly spaced around a circle of radius 10 units. Which steps correctly describe how to do this in AutoCAD?

hard

A. Select object, use ARRAYRECT, specify 4 rows, 2 columns, set spacing 5 units.

B. Select object, use ARRAYPOLAR, specify center point, enter 8 items, set radius 10 units.

C. Select object, use ARRAYPOLAR, specify center point, enter 10 items, set radius 8 units.

D. Select object, use ARRAYRECT, specify 8 rows, 1 column, set spacing 10 units.

Solution

1. Step 1: Choose correct array type for circular pattern

   To arrange copies evenly around a circle, use ARRAYPOLAR, not ARRAYRECT.

2. Step 2: Specify parameters correctly

   Specify the center point of the circle, number of items (8), and radius (10 units) to place copies evenly.

3. Final Answer:

   Select object, use ARRAYPOLAR, specify center point, enter 8 items, set radius 10 units. -> Option B

4. Quick Check:

   Polar array + correct items + radius = Select object, use ARRAYPOLAR, specify center point, enter 8 items, set radius 10 units. [OK]

Hint: Use ARRAYPOLAR with center, items, and radius [OK]

Common Mistakes:

• Using ARRAYRECT for circular pattern
• Mixing number of items and radius values
• Incorrect rows and columns for polar array