An engineering drawing shows the:
dimensions, tolerances, materials, and finishes of a component.
dimensions, tolerances, cost, and sales or use volume of a component.
materials, finishes, machining operations, and dimensions of a component.
cost, materials, tolerances, and lead-time for a component.
cost, dimensions, and machining operations for a component.
2 points
A knowledge society is one that has migrated from work based on knowledge to one based on manual work.
True
False
Which of the following is NOT a limitation of PERT?
Project activities have to be clearly defined, independent, and stable in their relationships.
Precedence relationships must be specified and networked together.
Only one time estimate can be used for each activity.
Time estimates tend to be subjective and are subject to fudging by managers.
There is the inherent danger of placing too much emphasis on the critical path.
The expected activity time in PERT analysis is calculated as:
the simple average of the optimistic, pessimistic, and most likely times.
the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b.
the sum of the optimistic, pessimistic, and most likely times.
the sum of the optimistic, pessimistic, and most likely times, divided by six.
the sum of the activity variances, divided by six.
The Correct Answer and Explanation is :
1. Engineering Drawing Contents:
The correct answer is:
dimensions, tolerances, materials, and finishes of a component.
Explanation:
An engineering drawing is a graphical representation of a component used to communicate its specifications for manufacturing or construction. It typically includes dimensions (which define the size and geometry of the component), tolerances (which define acceptable limits of variation in dimensions), materials (which specify the type of material to be used), and finishes (which describe the surface treatment or texture). These elements are essential for ensuring that the component is produced to the correct standards and functions as intended.
2. Knowledge Society:
The correct answer is:
False.
Explanation:
A knowledge society refers to a society that is increasingly based on the production, distribution, and use of knowledge. It is characterized by the importance of information technology, education, and the ability to process knowledge in decision-making processes. A knowledge society does not move from knowledge-based work to manual work but, instead, values intellectual capital and innovation. Manual labor is becoming less important, and work is more reliant on specialized knowledge and skills.
3. Limitation of PERT:
The correct answer is:
Only one time estimate can be used for each activity.
Explanation:
PERT (Program Evaluation and Review Technique) is used in project management to analyze and represent the tasks involved in completing a project. One of the major advantages of PERT is that it allows for three different time estimates for each activity: the optimistic time (O), the pessimistic time (P), and the most likely time (M). This enables the project manager to account for uncertainty. However, the option stating that only one time estimate can be used contradicts PERT’s methodology, which relies on three time estimates for each activity.
4. Expected Activity Time in PERT:
The correct answer is:
the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b.
Explanation:
In PERT analysis, the expected activity time (Te) is calculated using a weighted average formula. The three estimates (optimistic, pessimistic, and most likely times) are used as follows: Te=(O+4M+P)6Te = \frac{(O + 4M + P)}{6}
Here, O is the optimistic time, M is the most likely time, and P is the pessimistic time. The most likely time (M) is weighted four times more heavily than the other two times to give it more influence in the calculation of the expected activity time. This approach helps account for the fact that the most likely scenario is the one that should be given the most weight in predicting the project timeline.
These answers provide a clear understanding of each concept and its real-world application.