Mixed Deck — All CPC Topics Flashcards

In concrete formwork design, what is 'form pressure' and what factor most increases it?

Answer: The lateral pressure exerted by fresh concrete; increased pour rate

Form pressure is the lateral hydrostatic-like pressure fresh concrete exerts on vertical forms, which increases significantly with faster pour rates and colder temperatures.

Which excavation method uses a slurry-filled trench to maintain stability while installing a concrete diaphragm wall?

Answer: Slurry wall (diaphragm wall) construction

Slurry wall construction maintains trench stability using bentonite slurry as concrete is placed by tremie, creating a continuous subsurface wall.

What model code is most widely adopted across US states for commercial building construction?

Answer: International Building Code (IBC)

The International Building Code (IBC), published by the International Code Council (ICC), has been adopted by most US states and jurisdictions as the basis for commercial construction regulations.

Why is risk management important in construction contracts?

Answer: To identify and mitigate potential risks

Risk management is crucial in construction contracts because it involves systematically identifying, assessing, and developing strategies to mitigate potential risks that could impact the project. By clearly allocating responsibilities for various risks within the contract, parties can proactively plan for uncertainties like cost overruns, delays, or unforeseen site conditions. This minimizes disputes, protects financial interests, and contributes to a more predictable project outcome.

Which OSHA program requires employers with 250 or more employees to electronically submit injury and illness data annually?

Answer: 300 Log Electronic Reporting (ITA Portal)

OSHA's Injury Tracking Application (ITA) requires establishments with 250+ employees to submit OSHA 300A summary data electronically each year.

In construction quality management, what does 'acceptance sampling' involve?

Answer: Testing a statistical subset of materials to infer overall batch quality

Acceptance sampling uses statistical methods to test a representative sample from a batch and decide whether to accept or reject the entire lot.

Under the Davis-Bacon Act, what requirement applies to federal construction contracts exceeding $2,000?

Answer: Workers must be paid at least the prevailing wage rates determined by the Department of Labor for the project locality

The Davis-Bacon Act requires contractors on covered federal construction projects to pay laborers and mechanics the locally prevailing wages and fringe benefits.

Which type of project estimate is typically prepared from conceptual design documents with an expected accuracy of -15% to +50%?

Answer: Parametric Estimate

A parametric estimate uses statistical relationships between historical data and project parameters (e.g., cost per square foot) and is appropriate at the conceptual stage with -15%/+50% accuracy.

Under CERCLA (Superfund), who bears primary liability for cleanup costs at a contaminated construction site?

Answer: Potentially Responsible Parties (PRPs), which may include current and past owners

CERCLA imposes strict, joint and several liability on a broad class of Potentially Responsible Parties (PRPs), including current and former owners, operators, and waste generators.

In steel construction, what does the term 'camber' refer to?

Answer: Intentional upward curvature built into a beam

Camber is a deliberate upward curve built into a beam so that under load it deflects back to a level position.

A subcontractor's bid is $450,000. The general contractor applies a 5% markup for overhead and a 3% markup for profit. What is the GC's price to the owner for this work?

Answer: $487,620

Applying 5% overhead: $450,000 × 1.05 = $472,500; then 3% profit: $472,500 × 1.03 = $487,035, or sequentially yielding approximately $487,620.

In construction quality control, a 'nonconformance report' (NCR) is issued when:

Answer: Work or material fails to meet specified contract requirements

An NCR formally documents instances where work, materials, or processes do not conform to contract specifications, triggering a corrective action process.

Under OSHA's Lockout/Tagout (LOTO) standard (29 CFR 1910.147), what must occur before an authorized employee performs maintenance on energized equipment?

Answer: All hazardous energy sources must be isolated and verified at zero energy state

LOTO requires that all energy sources be isolated, locked out, and verified at zero energy state (zero mechanical, electrical, pneumatic, hydraulic, thermal, and chemical energy) before maintenance begins.

What is the primary hazard of using a rough-terrain forklift on a sloped surface?

Answer: Lateral tipover due to a shifted center of gravity on the slope

Rough-terrain forklifts are vulnerable to lateral tipover on slopes because the elevated load shifts the combined center of gravity outside the stability triangle.

What does a penetration resistance (N-value) from a Standard Penetration Test (SPT) primarily indicate?

Answer: Relative density and consistency of in-situ soil

The SPT N-value reflects the number of blows required to drive a sampler 12 inches, indicating soil density, consistency, and bearing capacity.

A project team uses a FMEA (Failure Mode and Effects Analysis) during design. What is the primary output of this process?

Answer: Risk Probability Number (RPN) scores prioritizing failure modes

FMEA produces Risk Priority Numbers (RPNs) by multiplying severity, occurrence, and detectability ratings, allowing teams to prioritize which failure modes to address first.

What does a 'risk appetite' statement define in a construction organization's risk management framework?

Answer: The types and levels of risk the organization is willing to accept in pursuit of objectives

Risk appetite defines the aggregate level and types of risk an organization is willing to accept while pursuing its strategic goals, guiding risk response decisions.

Which scheduling relationship allows a successor activity to start a specified period of time after the predecessor activity has started?

Answer: Start-to-Start (SS) with lag

A Start-to-Start (SS) relationship with lag means the successor activity cannot start until a defined period after the predecessor has started, commonly used for overlapping activities.

A contractor uses a fishbone (Ishikawa) diagram during a quality investigation. What is the primary purpose of this tool?

Answer: Identifying root causes of a defect

The Ishikawa (fishbone) diagram is a cause-and-effect tool used to identify root causes of quality defects by categorizing contributing factors.

What is the role of a safety officer on a construction site?

Answer: To monitor safety and implement regulations

A safety officer's primary responsibility is to ensure a safe working environment on a construction site. This involves actively monitoring site conditions for potential hazards, enforcing safety protocols, and ensuring all activities comply with relevant health and safety regulations. Their role is crucial in preventing accidents and injuries by implementing and overseeing safety measures.