Electrical Safety Final Exam Practice Flashcards

Flashcards covering key electrical safety concepts, OSHA standards, NFPA 70E boundaries, ladder and tool safety, fall protection, and health hazards.

If a power tool is found to have damage on a jobsite, what two steps should be taken?

Mark the tool "do not use" and take it out of service for repair.

What type of device provides a physical restraint to prevent electrical equipment from being turned back on during servicing?

A lockout device.

OSHA prohibits an employee from working on an energized circuit operating at or above what voltage threshold?

$50\,\text{volts}$ or more.

What is the maximum allowable size for openings in a safety net?

$36\,\text{square inches}$.

What boundary around exposed energized equipment is considered as hazardous as being in direct contact with the energized components?

Prohibited approach boundary.

When using an extension ladder to access a roof, how far above the roof line must the ladder extend?

$36\,\text{inches}$ (or $3\,\text{feet}$).

What is the typical voltage range of an electric shock caused by static electricity?

$10,000$ to $13,000\,\text{volts}$.

What document must detail proper procedures and personal protective equipment (PPE) required to safely work on energized equipment?

A company's safety plan.

What is the immediate first action after safely removing a shock victim from an energized circuit?

Administer first aid.

According to workplace safety standards, after what period of non-performance must an employee be retrained before performing a task again?

$1\,\text{year}$.

Why do double-insulated tools not require a grounding connection?

Double-insulated tools built with non-conductive housings protect the user without needing a grounding wire connection.

What four core components comprise a personal fall arrest system?

An anchor point, a lanyard or rope, a harness, and connecting hardware.

What personal protective equipment must always be worn when working with hand tools?

Safety glasses.

Which category of workplace inspection is assigned OSHA's highest priority?

Imminent danger inspections.

When using a step ladder, what three areas are strictly prohibited to stand on?

The top step, the top cap, and the horizontal cross-bars on the back of the ladder.

What is the definition of an affected employee under lockout/tagout procedures?

An employee whose job requires them to work on or around a piece of equipment being serviced or maintained.

What is defined as the arc flash boundary?

The area around exposed energized equipment within which a person could receive a second-degree burn in the event of an arcing incident.

Under what specific condition is an energized work permit NOT required?

Diagnosing and testing.

How frequently do manufacturers recommend testing a GFCI splitter using its built-in test button?

Before each use.

What personal protective equipment is required when operating powder-actuated tools?

Safety glasses and hearing protection.

What key safety information is listed in NFPA Table 130.7(C)(9)?

The hazard/risk category, whether rubber insulating gloves are required, and whether insulated hand tools are required.

What three main factors determine the severity of an electric shock?

Amount of current, amount of time the current flows, and path of the current.

What is recognized as one of the leading causes of injuries on a jobsite?

Falls.

What eye and face protection combination should be worn when operating a grinder or chop saw?

Safety glasses and a face shield.

What condition causes a heart to stop effectively pumping blood due to an electrical shock?

Ventricular fibrillation.

What standard criteria must safety glasses satisfy to be considered compliant safety glasses?

They must be designed and listed as safety glasses.

Which symptom is associated with heat exhaustion rather than heat stroke?

Cold clammy skin (symptoms of heat stroke include severe headache, mental confusion, and seizures).

What device should be used to verify zero potential voltage before working on equipment that has been locked and tagged out?

An electric meter.

If an arc flash hazard analysis has not been performed, what default minimum arc flash boundary applies to equipment with low arc flash hazard?

$4\,\text{feet}$.

Which boot rating designation indicates protection against electric shock traveling through the sole?

Electrical hazard (EH).

What maximum temperature can plasma reach during an arc flash event?

Up to $35,000\,^{\circ}\text{F}$.

What three elements must be included in the planning portion of a lockout-tagout (LOTO) procedure?

Investigation, effects of shutdown, and a written plan.

What is the restricted approach boundary?

The minimum distance a qualified person must keep from exposed energized equipment without having a documented plan and appropriate PPE.

When must an employee report job-related injuries to their employer?

Immediately.

What are three common examples of confined spaces found on jobsites?

Manholes, silos, and underground tunnels.

At what current range will a Ground Fault Circuit Interrupter (GFCI) disconnect a circuit in the event of a ground fault?

$4\text{--}6\,\text{mA}$.

Why is lifting heavy loads with your back considered improper technique?

Lifting should be done with your legs while holding weight close to your body and avoiding twisting, rather than placing strain on your back.

What types of substances create serious hazards on a construction site when consumed by workers?

Alcohol and illegal drugs, prescription drugs, and over-the-counter drugs.

Which type of rubber insulated PPE is resistant to ozone checking?

Type II.

Which approach boundary is NOT one of the NFPA 70E shock protection boundaries?

Controlled approach boundary (the standard boundaries are Limited, Restricted, and Prohibited).

How frequently should hard hats be inspected for damage?

Daily.

What minimum Sun Protection Factor (SPF) rating should sunscreen have to protect against sun damage?

SPF $30$.

What is the rule of thumb for setting up an extension ladder at the correct angle?

The base of the ladder must be $1\,\text{foot}$ from the wall for every $4\,\text{feet}$ of ladder length.

When working around machinery, what must be kept at a safe distance in addition to your body?

Tools and materials.

How are voltage-rated gloves sized?

By measuring around the largest part of the palm.

When must the air quality of a confined space be monitored?

Before entering and while work is being done.

What should be avoided when working in warm environments to prevent heat injury?

Drinks with caffeine.

What is the defining characteristic of flame-resistant (FR) clothing when exposed to fire?

It will self-extinguish.

What fall protection device slides up and down a vertical lifeline and stops a person in the event of a fall?

A rope or cable grab.

What item of PPE is required across all hazard/risk categories?

Safety glasses.