Electrical Hazard Identification & Risk Assessment Flashcards
7 cards from real ESC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Hazard Identification & Risk Assessment flashcards as text
When assessing the risk of electrical shock, which body path is considered the MOST dangerous?
Answer: Hand to hand
A hand-to-hand current path passes through the chest and heart, making it the most likely to cause ventricular fibrillation and cardiac arrest.
What does a Category 2 (CAT II) rating on a multimeter indicate?
Answer: It is rated for single-phase receptacle-connected loads
CAT II-rated meters are designed for use on single-phase receptacle-connected loads, such as household appliances and portable tools.
Which of the following BEST describes an 'electrically safe work condition'?
Answer: All hazardous energy has been isolated, locked out, and verified absent
An electrically safe work condition is achieved only when all energy sources are isolated, locked or tagged out, and the absence of voltage is verified.
A ground fault occurs when:
Answer: Current flows through an unintended path to ground
A ground fault happens when electrical current diverts from its intended path and flows through an unintended conductor or path to ground.
Incident energy in an arc flash hazard analysis is measured in:
Answer: Calories per centimeter squared (cal/cm²)
Incident energy is expressed in cal/cm² to quantify the thermal energy a worker at a given distance could receive during an arc flash event.
Which standard is the primary US reference for electrical safe work practices?
Answer: NFPA 70E (Standard for Electrical Safety in the Workplace)
NFPA 70E provides comprehensive requirements for safe electrical work practices, including hazard identification, risk assessment, and PPE selection.
What is the significance of the 'available fault current' when assessing electrical hazards?
Answer: It indicates how much current can flow during a fault, affecting arc flash severity
Available fault current determines the potential energy released during an arc flash; higher fault currents generally produce more dangerous arc flash events.