CPC CPC Construction Equipment & Temporary Structures 2

Question 1

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

Accepted Answer

The ratio of resisting moments to overturning moments

Answer

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

Question 2

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

Accepted Answer

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

Answer

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

Question 3

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

Accepted Answer

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

Answer

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

Question 4

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

Accepted Answer

29 CFR 1926 Subpart N

Answer

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

Question 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?

Accepted Answer

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

Answer

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.

(CPC) Certified Professional Constructor Practice Test

(CPC) Certified Professional Constructor Practice Test

CPC CPC Construction Equipment & Temporary Structures 2