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CPC Construction Equipment & Temporary Structures Flashcards

6 cards from real CPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 CPC Construction Equipment & Temporary Structures flashcards as text

  1. What is the purpose of 'pre-tensioning' the cables in a cable-supported temporary bridge during construction?

    Answer: Reduce cable sag to control the deck profile and distribute loads evenly

    Pre-tensioning cables in a temporary bridge reduces excessive sag, controls deflection under load, and distributes loads more uniformly across the structure.

  2. Which compaction equipment is most effective for cohesive (clay) soils?

    Answer: Sheepsfoot (tamping foot) roller

    Sheepsfoot rollers use high-pressure foot pads that penetrate and knead cohesive soils, achieving compaction through remolding rather than vibration.

  3. 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.

  4. What is the primary purpose of 'knee bracing' in a falsework (shoring) tower?

    Answer: Provide diagonal lateral stability to resist horizontal forces and racking

    Knee braces are diagonal members at the corners of shoring towers that resist horizontal forces, wind loads, and racking to maintain geometric stability.

  5. Under OSHA 1926 Subpart CC (Cranes and Derricks), what action is required when a power line is within the swing radius of a crane?

    Answer: De-energize and ground the line, or maintain required clearances and have a dedicated spotter

    OSHA 1926.1408 requires de-energizing and grounding power lines or maintaining minimum clearances (typically 10–50 ft depending on voltage) and using a qualified spotter.

  6. What is the function of 'outriggers' on a mobile crane?

    Answer: Provide a wider, more stable base to prevent tipover during lifting operations

    Outriggers extend horizontally from the crane body and are lowered onto pads to widen the crane's base, dramatically increasing stability and rated lifting capacity.