Constraint Questions

Below are questions to test your knowledge and understanding of 2D and 3D constraints.

Before you continue, make sure you have studied the theory by clicking here.

Questions

Question 1

Question 2

Question 3

Question 4

Question 1

Illustrated views of two bottles are shown below. There are three stages in the assembly. a. State, using 3D CAD terms, how you would assemble and constrain the components shown. Corresponding surfaces and/or edges have been indicated for you. (3 marks)

Answers

Centre Axis
Align
Mate

Question 2

A designer has created preliminary sketches for a ceiling-mounted display sign for an airport. The designer used constraints to assemble both parts of the display sign. The before and after of stage 1 of the assembly are shown below. The grey areas show the constrained surfaces in stage 1.

a. State the name of the CAD constraint used above. (1 mark)b. State the names of two other constraints used in 3D CAD modelling.(2 marks)

Answers

Align

Centre Axis
Mate

Question 3

3D CAD constraints were used to assemble the components of the stackable toy. a. Identify the 3D CAD constraint used at each stage. (3 marks)

Stage 1
Stage 2
Stage 3

Answers

Centre Axis
Mate
Align

Question 4

The top and body of the diffuser were assembled using 3D CAD software. Graphics showing both parts before being assembled are shown. a. Describe, using the 3D CAD constraints, how to fully assemble the top and body parts of the tealight diffuser. You may annotate the graphics above to support your answer. (2 marks)

Answers

Centre axis constraint applied using axis of both components. (1 mark)
Mate constraint applied between top surface of “body” and underside surface of “top”. (1 mark)

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