Engineering Graphics Unit 7 Notes PDF

Unit 7: CAD Customisation Overview

Engineering Graphics Unit 7 focuses on CAD customisation and drawing setup. This unit explains how to configure drawing page, printer, scale, units, limits, snap tools, constraints and coordinate input methods in CAD software.

In RGPV exams, questions are repeatedly asked from coordinate input methods, snap to objects, drawing limits, scale settings, orthographic constraints and circle drawing methods.

Unit 7 Syllabus

• Customisation & CAD Drawing
• Setup of Drawing Page and Printer
• Scale Settings
• Units and Drawing Limits
• ISO and ANSI Standards
• Coordinate Dimensioning and Tolerancing
• Orthographic Constraints
• Snap to Objects: Manual and Automatic
• Coordinate Input Entry Methods
• Drawing Straight Lines
• Methods of Drawing Circles

Most Important Topics for Exam

Short Notes for Quick Revision

1. Customisation in CAD

Customisation means changing CAD settings according to drawing requirements. It improves drawing efficiency, accuracy and standard formatting.

2. Drawing Page Setup

Before starting a CAD drawing, the page is configured according to required sheet size, orientation, margins, plot area and scale settings.

3. Printer Setup

Printer setup is used for printing engineering drawings correctly. It includes printer selection, paper size, plot style and print scale.

4. Scale Settings

Scale is used to represent actual object dimensions proportionally. Common scales are full scale, reducing scale and enlarging scale.

5. Units

Units define the measurement system used in CAD drawing. Common units are millimeters, centimeters and inches.

6. Drawing Limits

Drawing limits define the working area of a CAD drawing. They help in proper scaling, drawing management and accuracy.

7. ISO and ANSI Standards

ISO and ANSI standards provide standard rules for engineering drawings, dimensioning and tolerancing. ISO is used internationally and ANSI is mainly used in the USA.

8. Coordinate Dimensioning

Coordinate dimensioning specifies locations of features using coordinate values. It provides high accuracy and is useful for CNC machining.

9. Tolerancing

Tolerance is the permissible variation in dimensions. Common types include unilateral tolerance, bilateral tolerance and limit dimensioning.

10. Orthographic Constraints

Orthographic constraints restrict drawing movement or direction. Common constraints include horizontal, vertical, parallel and perpendicular constraints.

11. Snap to Objects

Snap helps in selecting exact points automatically or manually. It improves accuracy, saves time and reduces errors.

12. Coordinate Input Methods

Coordinate input methods are used to specify point locations in CAD. Main methods are absolute coordinate, relative coordinate and polar coordinate system.

13. Drawing Straight Lines

Straight lines are drawn using LINE command and coordinate entry methods. They are used in engineering drafting, building plans and mechanical components.

14. Methods of Drawing Circles

Circles can be drawn using center-radius, center-diameter, two-point, three-point and tangent-tangent-radius methods.

CAD Setup Table

Coordinate Input Methods

Object Snap Methods

Circle Drawing Methods

Important Questions

1. Explain setup of drawing page and printer in CAD.
2. Explain scale settings and drawing limits in CAD software.
3. Explain ISO and ANSI standards for coordinate dimensioning and tolerancing.
4. Explain coordinate dimensioning and tolerancing methods with examples.
5. Explain orthographic constraints in CAD software.
6. Explain snap to object methods in CAD.
7. Explain coordinate input methods with examples.
8. Explain different methods of drawing circles in CAD.
9. Explain customization techniques in CAD software.
10. Explain applications of CAD standards in engineering drawing.
11. Explain drawing limits and unit settings in CAD.
12. Explain advantages of CAD customization.

PYQ Analysis Table

According to the uploaded Unit 7 PYQ analysis, coordinate input methods, snap to objects, scale settings, drawing limits, coordinate dimensioning, circle drawing methods and CAD customisation are repeatedly asked in RGPV exams. :contentReference[oaicite:0]{index=0}

High Chance Questions for Next Exam

1. Explain coordinate input methods in CAD.
2. Explain snap to object methods with examples.
3. Explain coordinate dimensioning and tolerancing.
4. Explain scale settings and drawing limits.
5. Explain methods of drawing circles in CAD.
6. Explain orthographic constraints in CAD.
7. Explain setup of drawing page and printer.
8. Draw straight lines using coordinate entry methods.
9. Explain ISO and ANSI standards.

Topic Weightage Analysis

How to Prepare Graphics Unit 7

• Practice absolute, relative and polar coordinate input methods daily.
• Learn endpoint, midpoint, center and intersection snap methods.
• Revise drawing limits, scale settings and printer setup.
• Prepare ISO and ANSI standards with short notes.
• Practice circle drawing methods using CAD commands.
• Learn tolerancing, coordinate dimensioning and orthographic constraints properly.

Frequently Asked Questions

Is Engineering Graphics Unit 7 important for RGPV exams?

Yes, Unit 7 is important because coordinate input methods, snap commands, drawing limits and CAD customisation are repeatedly asked.

Which topic is most important in Graphics Unit 7?

Coordinate Input Methods and Snap to Objects are the most important topics.

What are coordinate input methods in CAD?

The main coordinate input methods are absolute coordinate system, relative coordinate system and polar coordinate system.

Are CAD practical questions asked from Unit 7?

Yes, CAD practical and theory questions are asked from drawing lines, circle methods, snap and coordinate input.

Is this website official?

No, this is an independent educational website created only for student support and exam preparation.

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