BIM Exam Questions Flashcards
(29 cards)
High-quality information and efficient methods of sharing information are vital
for successful delivery of a construction project.
Which are the three types of information included in 3D BIM?
Graphical Data
Non-graphical data
Documents
What does the acronym ‘CDE’ stand for? Give a definition for CDE
Common Data Envirnoment
An online place to collect, manage and share information among your team
Excluding the ‘archive’ state, what are the three states each information should be in within the CDE?
Published, shared and work in progress
List the advanatages and disadvantages of using IFC for exchanging models:
Advantages:
-Good global standard to describe share and exchange infor
-Enables open BIM
-Supported by 150 softwares
-Neutral
Limitations:
-Complex and difficult to maintain
-Needs to be a superset of all data models, which is near enough impossible
Name, without using abbreviations, the 2 types of solid model representation. Which type of solid model representation is typically used to define BIM objects?
Boundary representation and construction solid geometry
In BIM, a hybrid solid modelling approach containing B-rep and CSG is used.
What are the three Boolean operations that can be applied to CSG to combine simpler objects?
Union, intersection and difference.
List 2 objectives of introducing modelling on different level of detail/develpment (LoD). Describe which LoD is commonly required in the design stage:
Helps teams to specifify BIM deliverables and get a clear picture of what will be used.
-Provide a standard that can be referenced by contracts.
In early design stage, a low level of detail (100) is used. The model element may be graphically represented in the model with a symbol.
What is interoperability? List 3 reasons why interoperability is important?
Interoperability is the ability of computer systems or software to exchange
and make use of information
Improved Efficiency and Productivity
Better Decision-Making
Enhanced User and Customer Experience
What is a federated model?
It is a combined/merged BIM model that has been compiled by
amalgamating several different models into one
What is the difference between native or closed BIM and open BIM?
Native or closed BIM uses software from a single vendor, whereas open
BIM uses software from different vendors that can ‘talk’ to each othe
What technique is used to resolve spacial conflicts in a federated model. Define ‘hard’ and ‘soft’ spacial confilts:
Clash detection
Hard clashes occur when two components occupy the same space.
Soft clashes occur when an element isn’t given the spatial or geometric
tolerances it requires or its buffer zone is breached
What is level 3 BIM?
Full integration and collaboration between all disciplines by means of using
a single, shared project model which is held in a centralized repository
The UK government set BIM Level 2 as the minimum target method of
working for all work on public-sector projects in 2016.
(a) Explain the process of developing a BIM model at this level of maturity.
Different disciplines create their own BIM models, which are then merged
into a Federated Model.
The UK government set BIM Level 2 as the minimum target method of
working for all work on public-sector projects in 2016
Describe the data exchange formats and procedures at this level of
maturity.
Data should be shared through a common file format (e.g., IFC) using a
common data environment (CDE)
The UK government set BIM Level 2 as the minimum target method of
working for all work on public-sector projects in 2016.
What is the key difference between this maturity level and the next one?
(BIM Level 3).
In BIM Level 3 there is no need for a federated model, as different
disciplines can use a single, shared project model held in a centralised
repository.
Describe the data exchange procedures at BIM Level 0.
In BIM Level 0 information is shared via paper or electronic prints, there is
no use of BIM.
As part of your BIM GDP, you prepared a BIM Execution Plan (BEP) to
respond to your client’s information requirements.
Besides the project’s information and background, list three items that
should be defined in the BEP
- Mayor project milestones
- BIM standards applicable to the project
- Level of Information Need/Level of Detail
- Modelling standards (project units, room numbering and naming
convention, model subdivision) - CDE folder structure
- Technical information (software platforms, data exchange file formats,
project coordinates) - Quality control
List the four states each information container could be in within a CDE.
Work in progress, shared, published, archive
The BEP that you prepared, and the information model that you
developed, respond to the information requirements of your client in
relation to the delivery of an art gallery. What type of information model
should be developed in response to information requirements in relation
to the operation of the art gallery?
An asset information model (AIM).
With nD modelling, we add extra ‘dimensions’ of data to our models, with the
potential to give a richer understanding of a construction project.
List the three types of information contained in 3D BIM.
Graphical, non-graphical, documentation.
3D BIM is widely used for clash detection. How could we use 4D BIM to
identify clashes? Give an example.
We can use 4D BIM to identify time and space conflicts, for example, a
crane obstructing a construction activity at a given point in time
Besides 3D and time information, list four other ‘dimensions’ of data that
we can add in nD modelling.
Cost, sustainability, facility management, safety
Name the degrees of parametric modelling in the context of BIM.
Explain each degree using the sequence of columns shown in Figure Q.1
as an example.
– Parametric solid modelling is the simplest level. Objects, shapes or
assemblies are defined by a few parameters. (e.g., in the figure, this
refers to the columns with cross section dimensions and heights as
instance parameters).
– Parametric assembly modelling calls in instances of the individual
parametric objects and specifies parametric relations between them.
(e.g., in the figure, this refers to the column class but also to the relation
with fixed spacing ‘x’ between them).
– Topology-based parametric objects/Script-based rules embed
complex intelligence into a parametric model. (e.g., in the figure,
programmed rules for the columns’ heights and spacing between
columns).
The Nottingham Railway Station will undergo reconstruction in 2025, and the
project will be delivered according to current ISO 19650 standards. You are
hired as BIM manager and your task is to ensure delivery of the project
according to the standards.
Describe and justify the maturity level of BIM required for the delivery of
the project and list the main deliverables.
If the project is to be delivered in 2025, the required maturity level set as
a minimum target by the UK government for all work in the public sector
work is level 2.
- All parties use their own 3D BIM models to create a Federated Model.
- Design information is shared through a common file format (e.g., IFC)
using a Common Data Environment (CDE).
The main deliverables of level 2 are:
- 3D BIM models
- 2D PDFs of the drawings
- COBie UK 2012 dataset
