Question 1: The Computer-aided design (CAD) hardware doesn't include?

• Graphic display terminals
• Computer
• Computer Programs (Correct answer)
• Keyboard

Correct answer: Computer Programs

CAD has both hardware and software components. The hardware components are Graphic display terminals, Computer and Keyboard. The software components include all computer programmes that implements computer graphics.

Question 2: How many types of CAD are there?

• 6
• 4
• 2
• 5 (Correct answer)

Correct answer: 5

The five types are 2D CAD (flat drawings of product), 2.5D CAD (Prismatic models), 3D CAD (3D objects), 3D wireframe and surface modelling (skeleton like inner structure) and solid modelling (solid geometry).

Question 3: Modem CAD systems are based on?

• ICG (Correct answer)
• GCI
• GIF
• IFG

Correct answer: ICG

ICG is interactive computer graphics. It denotes a user-oriented system in which computer is used to create, transform and display data in pictorial or symbolic forms.

Question 4: The computer communicates with the user via:

• CPU
• CRT (Correct answer)
• Graphics
• Display Button

Correct answer: CRT

Cathode Ray Tube (CRT) screen gives the user the design created as an image. It is done by entering commands to get specific functions performed.

Question 5: The process o designing consists of __________ identifiable steps.

• 8
• 5
• 4
• 5 (Correct answer)

Correct answer: 5

The six steps are recognition of need, the definition of a problem, synthesis, analysis & optimization, evaluation and presentation.

Question 6: Implementing CAD improves communications.

• A. True
• B. False

The us of CAD system provides the better understanding of engineering drawings by standardizing them. It has fewer errors, proper documentation and greater legibility.

Question 7: The functionality areas of CAD application can be grouped into ______________ categories.

• 2
• 3
• 4 (Correct answer)
• 5

Correct answer: 4

The four categories are geometric modelling, engineering analysis, design review and evaluation and automated drafting.

Question 8: The color on CRT screen is obtained by the combination of?

• Red, yellow, blue
• Red, green, blue (Correct answer)
• Green, black, yellow
• Red, black, yellow

Correct answer: Red, green, blue

The three primary colour red, green and blue are combined to produce variety of colours. Color CRT uses electron beams of these triad colours on phospor screen to display objects.

Question 9: Who formulated the six ground rules to be considered in designing graphics software?

• Newman and sproull (Correct answer)
• Schaffer G
• Fitzgerald W
• Krouse and Lerro

Correct answer: Newman and sproull

They gave six ground rules which were simplicity, consistency, completeness, robustness, performance and economy.

Question 10: The input devices in CAD can be divided into:

• 2
• 5
• 3 (Correct answer)
• 4

Correct answer: 3

The input devices can be divided into three general categories. These are cursor control devices ( direct keys on keyboard, joysticks, tracker ball, etc.), digitizers (large smooth board with electronic tracking device) and alphanumeric and other keyboard terminals.

Question 11: The typical ICG system consists of software component:

• A. True
• B. False (Correct answer)

Correct answer: B. False

It consists of both hardware and software. Hardware includes CPU, workstations and peripheral devices. Software consists of computer programmes required to implement graphics.