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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 does the term 'factor of safety against overturning' mean for a temporary retaining structure?

    Answer: The ratio of resisting moments to overturning moments

    The factor of safety against overturning is the ratio of stabilizing (resisting) moments to destabilizing (overturning) moments about the toe of the structure.

  2. In earthmoving operations, what does the 'swell factor' account for?

    Answer: The increase in soil volume when excavated from bank state to loose state

    Swell factor accounts for the volume increase (typically 20–40%) that occurs when in-situ (bank) soil is excavated and becomes loose material.

  3. 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.

  4. Which OSHA standard governs the use of personnel hoists (elevators) on construction sites?

    Answer: 29 CFR 1926 Subpart N

    OSHA 29 CFR 1926 Subpart N covers the use of material hoists, personnel hoists, and elevators on construction sites.

  5. What is the minimum horizontal distance from the edge of an excavation that heavy equipment must be positioned to prevent surcharge loads from causing cave-ins?

    Answer: At a distance equal to or greater than the depth of the excavation, or per geotechnical analysis

    OSHA requires that equipment and spoil be stored away from excavation edges at a distance that prevents surcharge from exceeding the soil's bearing capacity, with the minimum typically equaling excavation depth.

  6. A 'load moment indicator' (LMI) on a mobile crane is designed to:

    Answer: Warn the operator when the load approaches or exceeds the crane's rated capacity

    An LMI (also called a rated capacity indicator) monitors load and radius in real time and alerts the operator before the crane reaches its tipping or structural load limit.