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Safety Procedures Flashcards

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

Read the first 7 Safety Procedures flashcards as text

  1. Under OSHA excavation rules, at what depth must a trench generally have a protective system (unless it is in stable rock)?

    Answer: 5 feet

    OSHA 29 CFR 1926.652 requires protective systems for trenches 5 feet deep or more unless they are excavated entirely in stable rock.

  2. A survey crew is working on the shoulder of a highway. Which document sets the national standard for their temporary traffic control setup?

    Answer: The Manual on Uniform Traffic Control Devices (MUTCD)

    The FHWA's MUTCD Part 6 covers temporary traffic control for work zones, including survey operations.

  3. Under the 30-30 lightning guideline, when should a field crew stop work and seek shelter?

    Answer: When thunder is heard within 30 seconds of a lightning flash

    A flash-to-bang count of 30 seconds or less means lightning is within about 6 miles, close enough to strike.

  4. What is the minimum ANSI/ISEA 107 high-visibility garment class generally required for workers exposed to traffic on roads with speeds above 50 mph?

    Answer: Class 3

    Class 3 garments offer the most retroreflective and background material and are recommended for high-speed, high-risk roadway work.

  5. Before entering a permit-required confined space such as a deep sanitary manhole, what must be tested first?

    Answer: Atmosphere for oxygen, flammable gases, and toxic gases

    OSHA requires atmospheric testing for oxygen, flammability, and toxics before entry into a permit-required confined space.

  6. A crew member shows hot, dry skin, confusion, and a very high body temperature after working in the sun. What is the most likely condition?

    Answer: Heat stroke

    Heat stroke involves altered mental status and dangerously high body temperature and is a life-threatening emergency requiring 911.

  7. What is the minimum clearance OSHA generally requires between a survey rod or equipment and overhead power lines rated up to 50 kV?

    Answer: 10 feet

    OSHA requires keeping conductive objects at least 10 feet from energized lines up to 50 kV, with more clearance at higher voltages.