undefined | unit 5 pictorial view 2

Back to Study material

Computer-aided Civil Engineering Drawing

Unit – 5

Pictorial View

Q1) What is isometric?

A1) It is defined as 3D objects drawn with no perspective i.e., Lines have no vanishing points is termed as isometric.

Q2) What is Perspective?

A2) It is defined as 3D objects drawn with 1 or more vanishing points is called as Perspective

Q3) What are the fundamental of building information modelling?

A3) 5 fundamentals of BIM are: -

1. Visualization

BIM provides a 3D virtual model of a project that helps owners to visually understand how a building will be constructed.

It also allows owners and all players elaborate to entirely see a building before construction even begins.

2. Quantification

BIM software generates real time values for any design small changes that an owner wishes to make.

3. Communication

Collaboration and communication between all players intricate in a project is essential for the utilization of BIM.

BIM increase communication and comprehension with potential stakeholders.

4. Coordination

Valuable aspects of BIM are its clash detection and resolution ability.

BIM is able to examine the information from multiple systems, such as the mechanical, plumbing and electrical systems, and detect. It is important to the project team as it saves money in change orders that can be very costly.

5. Simulation

BIM is able to create a 4D simulation of the construction schedule—allowing all players demand to have a better understanding of the entire construction process visually.

It also helps with determining the planning of the schedule and preparing for the construction phase of the project.

Q4) Define BIM?

A4) Building Information Modelling (BIM) is an intelligent 3D model-based process that gives architecture, engineering, and construction (AEC) professionals the insight and tools to more efficiently plan, design, construct, and manage buildings and infrastructure

Q5) What is BIM include?

A5)

Viewing systems from multiple perspectives.

Discovering causes and effects using model traceability.

Improving system understanding through visual analysis.

Discovering errors earlier and reducing system defects.

Exploring alternatives earlier in the system lifecycle

Q6) What is the isometric projection?

A6) It’s a pictorial orthographic projection of an object where a transparent cube containing the object is tilted before one of those solid diagonals of the cube becomes perpendicular to the vertical plane along with the three axes are equally inclined to this vertical plane

Q7) Write the perspective principles?

A7) The main principle that are responsible for linear perspective are

1) size of forms,

2) overlap of forms,

3) placement of forms and

4) Convergence of lines.

All four principles can and should be used together to best interpret perspective.

Size of Forms

The largest of similar forms will appear closest to the viewer. With this scene, the square on the right appears closest because it is largest of the three. The square on the left appears to be the farthest away because it is the smallest.

Overlap of Forms

The square at the top looks bigger because it is overlapping the square at the bottom.

Placement of Forms

Forms placed farthest from the horizon appear closest to the viewer. The square on the right is farther from the horizon than the other two boxes, causing it to look closer to the viewer, whereas the other boxes are closer to the horizon, making them appear farther away.

Convergence of Lines

Parallel lines converge in the distance. In this scene, the road lines (orthogonal lines) meet as they recede into the distance, giving the appearance of depth. A vanishing point is formed where the orthogonal lines meet. The principle of convergence of lines shares the concept of depth expressed through size in that the width of the path decreases with distance.

Q8) Write the types of perspective drawing?

A8) There are typically three types of perspective drawing:

One-point perspective,

Two-point perspective, and

Three-point perspective.

Q9) What is the relation between lines in isometric?

A9) 1. Line those are parallel to object are parallel at isometric projection.

2. Vertical lines at object seen vertical at isometric projection.

3. Horizontal lines on body are drawn at an angle of 30owith horizontal at isometric projection.

4. Lines parallel to an isomeric axis term as isometric line and by fore shortened to 82%.

5. Lines which are not parallel to any isometric axis is term as non-isometric line.

Q10) Draw perspective view of building?

A10)

Sign Up