Quick Answer
The correct answer is Cost, along with Time, as these two represent the core constraints in the project management triangle, also known as the triple constraint. This classic model traditionally binds together time, cost, and scope, where cost directly limits the budget for labor, materials, and overhead, while time governs the project schedule and deadlines. On the CompTIA Project+ PK0-005 exam, this concept tests your understanding of how these interdependent constraints drive trade-offs; a common trap is confusing quality or resources as primary vertices when they are often secondary factors influenced by the triple constraint. To remember, think of the triangle’s three fixed sides: you cannot change cost or time without affecting scope, and vice versa. A simple mnemonic is “T-C-S” for Time, Cost, Scope—the three pillars that every project manager must balance.
This PK0-005 practice question tests your understanding of project management concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO are examples of project constraints in the project management triangle? (Choose two.)
Time
Time is one of the three primary constraints.
Risk
Why wrong: Risk is an uncertainty, not a constraint in the triangle.
Resources
Why wrong: Resources can be a constraint but not in the classic triangle.
Cost
Cost is a primary constraint.
Quality
Why wrong: Quality is often considered an additional constraint but not part of the original triangle.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Time
The project management triangle, also known as the triple constraint, traditionally consists of time, cost, and scope. Time (A) is a core constraint because it defines the project schedule and deadlines, directly impacting resource allocation and deliverables. Cost (D) is another core constraint, representing the budget available for labor, materials, and overhead, which limits project scope and quality. These two are explicitly listed as primary vertices in the classic triple constraint model.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Time
Why this is correct
Time is one of the three primary constraints.
Related concept
Read the scenario before looking for a memorised answer.
Risk
Why it's wrong here
Risk is an uncertainty, not a constraint in the triangle.
Resources
Why it's wrong here
Resources can be a constraint but not in the classic triangle.
Cost
Why this is correct
Cost is a primary constraint.
Related concept
Read the scenario before looking for a memorised answer.
Quality
Why it's wrong here
Quality is often considered an additional constraint but not part of the original triangle.
Common exam traps
CompTIA often tests the classic triple constraint definition, and the trap here is that candidates confuse 'resources' (which is part of cost or scope) or 'quality' (which is a result of constraints) as primary vertices, instead of recognizing that the traditional triangle explicitly includes only time, cost, and scope.
Detailed technical explanation
The project management triangle is a foundational model in PMBOK Guide (6th Edition, Section 1.2.4.1) where time, cost, and scope are interdependent; changing one affects the others. For example, reducing time (schedule compression) often increases cost (overtime pay) or reduces scope (feature cuts). In practice, the triple constraint is used to balance trade-offs during project planning and execution, such as when a sponsor demands a fixed deadline (time) and fixed budget (cost), forcing scope adjustments.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the PK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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Project Management Concepts — study guide chapter
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FAQ
Project Management Concepts — This question tests Project Management Concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Time — The project management triangle, also known as the triple constraint, traditionally consists of time, cost, and scope. Time (A) is a core constraint because it defines the project schedule and deadlines, directly impacting resource allocation and deliverables. Cost (D) is another core constraint, representing the budget available for labor, materials, and overhead, which limits project scope and quality. These two are explicitly listed as primary vertices in the classic triple constraint model.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This PK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PK0-005 exam.
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