Construction and Material Related Topics -
Project Planning
1. Total float can be defined as late start minus early finish. True or false?
Answer: False
Explanation: The formula for Total Float is: Total Float=Late Start−Early Start
or Total Float=Late Finish−Early Finish It represents the amount of time an
activity can be delayed without delaying the entire project's completion date.
2. Which of the following is not a direct cost? A. Labor B. Risk C. Materials D.
Equipment
Answer: B. Risk
Explanation:
Direct costs are expenses directly related to the physical work of the project,
such as labor, materials, and equipment usage.
Indirect costs are expenses incurred to support the project but are not
directly tied to a specific activity, such as overhead, insurance, and
administrative costs. Risk is a component of profit and overhead, which are
typically part of the markup, not a direct cost.
,3. True or False: The formula for markup in terms of cost estimating is:
Markup = (profit + risk + overhead) x (direct costs)
Answer: True
Explanation: This formula is a simplified representation of how a contractor's
markup is calculated. The markup is a percentage or factor applied to the direct
costs to cover indirect costs (overhead), profit, and contingencies (risk).
4. Which of the following is not considered an indirect cost? A. Home office B.
Insurance C. Materials D. Both B and C
Answer: C. Materials
Explanation: Materials are a direct cost because they are consumed directly in
the construction of the project. Home office expenses and insurance are examples
of indirect costs that support the overall business and project without being tied to
a specific construction activity.
5. When does negative float occur?
Answer: Negative float occurs when the activity duration or start/finish dates
exceed what is allowed by the project's baseline schedule. This indicates that the
project is behind schedule and requires corrective action to meet the deadline.
6. The longest path through the construction schedule or the earliest possible
date for project completion is defined as the __________.
Answer: critical path
Explanation: The critical path is the sequence of activities that has the longest
duration from start to finish. Any delay to an activity on this path will delay the
entire project. For activities on the critical path, the Early Start equals the Late
Start, and the Early Finish equals the Late Finish, resulting in a total float of zero.
, 7. An activity on the critical path cannot have a float. True or false?
Answer: True
Explanation: By definition, activities on the critical path have zero total float.
This means there is no leeway in their scheduling; any delay will push back the
project completion date.
8. Dummy activities can have a duration only if it does not exceed the float.
True or false?
Answer: False
Explanation: Dummy activities are used in the Activity-on-Arrow (AOA)
network diagram to show logical dependencies and have a zero duration. They do
not represent work and are only used for network logic.
9. Based on the figure, what equation(s) describes the cross-sectional area of
the footing? (Assuming a rectangular footing with a hole in the middle, or a box-
like section)
Answer: The provided answer is ambiguous without a picture. However, for a
hollow rectangular section with thickness, the cross-sectional area would be:
Cross−sectional area=2×thickness×(Length+Width)−4×thickness2 For a simple "I"
or "T" shape, it would be the sum of the areas of the individual rectangles. The
provided answer: "Cross-sectional area = 2(thickness)(Xoutside + Yinside) or
2(thickness)(Xinside + Youtside)" seems to imply a hollow rectangular section
where X and Y are outside/inside dimensions, which is a bit unusual. A more
standard approach would be to calculate the area of the outer rectangle minus the
area of the inner rectangle.
10. What equation calculates project duration?
Project Planning
1. Total float can be defined as late start minus early finish. True or false?
Answer: False
Explanation: The formula for Total Float is: Total Float=Late Start−Early Start
or Total Float=Late Finish−Early Finish It represents the amount of time an
activity can be delayed without delaying the entire project's completion date.
2. Which of the following is not a direct cost? A. Labor B. Risk C. Materials D.
Equipment
Answer: B. Risk
Explanation:
Direct costs are expenses directly related to the physical work of the project,
such as labor, materials, and equipment usage.
Indirect costs are expenses incurred to support the project but are not
directly tied to a specific activity, such as overhead, insurance, and
administrative costs. Risk is a component of profit and overhead, which are
typically part of the markup, not a direct cost.
,3. True or False: The formula for markup in terms of cost estimating is:
Markup = (profit + risk + overhead) x (direct costs)
Answer: True
Explanation: This formula is a simplified representation of how a contractor's
markup is calculated. The markup is a percentage or factor applied to the direct
costs to cover indirect costs (overhead), profit, and contingencies (risk).
4. Which of the following is not considered an indirect cost? A. Home office B.
Insurance C. Materials D. Both B and C
Answer: C. Materials
Explanation: Materials are a direct cost because they are consumed directly in
the construction of the project. Home office expenses and insurance are examples
of indirect costs that support the overall business and project without being tied to
a specific construction activity.
5. When does negative float occur?
Answer: Negative float occurs when the activity duration or start/finish dates
exceed what is allowed by the project's baseline schedule. This indicates that the
project is behind schedule and requires corrective action to meet the deadline.
6. The longest path through the construction schedule or the earliest possible
date for project completion is defined as the __________.
Answer: critical path
Explanation: The critical path is the sequence of activities that has the longest
duration from start to finish. Any delay to an activity on this path will delay the
entire project. For activities on the critical path, the Early Start equals the Late
Start, and the Early Finish equals the Late Finish, resulting in a total float of zero.
, 7. An activity on the critical path cannot have a float. True or false?
Answer: True
Explanation: By definition, activities on the critical path have zero total float.
This means there is no leeway in their scheduling; any delay will push back the
project completion date.
8. Dummy activities can have a duration only if it does not exceed the float.
True or false?
Answer: False
Explanation: Dummy activities are used in the Activity-on-Arrow (AOA)
network diagram to show logical dependencies and have a zero duration. They do
not represent work and are only used for network logic.
9. Based on the figure, what equation(s) describes the cross-sectional area of
the footing? (Assuming a rectangular footing with a hole in the middle, or a box-
like section)
Answer: The provided answer is ambiguous without a picture. However, for a
hollow rectangular section with thickness, the cross-sectional area would be:
Cross−sectional area=2×thickness×(Length+Width)−4×thickness2 For a simple "I"
or "T" shape, it would be the sum of the areas of the individual rectangles. The
provided answer: "Cross-sectional area = 2(thickness)(Xoutside + Yinside) or
2(thickness)(Xinside + Youtside)" seems to imply a hollow rectangular section
where X and Y are outside/inside dimensions, which is a bit unusual. A more
standard approach would be to calculate the area of the outer rectangle minus the
area of the inner rectangle.
10. What equation calculates project duration?
