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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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Electrical hazards include shock, electrical arcs and blasts, and _____or faulty equipment.
Broken
Double-insulated
Polished
Secure
Broken
Quick Summary: Electrical hazards in industrial and domestic environments are primarily caused by physical damage to equipment and insulation failure. Broken equipment exposes energized parts that are usually shielded, creating a path for current to flow through a person (shock) or between phases (arc/blast).
Electrical hazards in industrial and domestic environments are primarily caused by physical damage to equipment and insulation failure. Broken equipment exposes energized parts that are usually shielded, creating a path for current to flow through a person (shock) or between phases (arc/blast).
I=RV — Ohm's Law governing the magnitude of current flow during a contact hazard.
P=I2R — Power dissipated as heat in an electrical arc, causing blasts.
When equipment housing or insulation is broken, the 'Basic Protection' barrier is compromised. According to Ohm's Law, I=RV, if an individual contacts an exposed conductor, the body resistance Rbody becomes part of the circuit. In the event of a fault, the sudden discharge of energy through an ionized air path results in an electrical arc, characterized by extreme temperatures and potential explosions.
Broken casing or frayed cables are primary causes of accidental electrocution.
Electrical arcs occur when air ionizes due to high voltage potential across a gap.
Double-insulated tools (Option B) are safety features designed to prevent the exact hazards mentioned in the question.
Preventive maintenance and visual inspection of cords and plugs are standard safety protocols.
Identifies root causes of electrical injuries
Promotes proactive safety management
Equipment degradation is often invisible without testing
Human error remains a major variable
Industrial safety auditing
Residential electrical wiring inspection
Portable appliance safety testing (PAT)
Electrical shock severity is determined by current magnitude (mA), duration of contact, and the path taken through the body.
Broken components often lead to 'live-chassis' faults where the metal enclosure becomes energized.
A is correct — Broken equipment compromises physical barriers, leading to exposure of live parts and potential electrical faults.
In competitive exams, always remember that 'Double-insulated' tools are a mitigation strategy, while 'Broken' equipment is a hazard source.