NETA Safety Handbook Volume II Practice Flashcards

50 flashcards based on the NETA Safety Handbook Volume II covering electrical maintenance, arc-flash safety, LOTO procedures, and OSHA/NFPA regulations.

According to the NFPA 70E standard, what does the 'content' of effective electrical safety communication consist of?

Standards and associated written procedures.

In the context of electrical safety communication, what provides the 'context' for performing work tasks safely?

Worker training, skills, and knowledge of electrical equipment and electrical hazards.

According to NFPA 70E, Article 130.3, how often must an arc-flash hazard analysis be reviewed to account for system changes?

At intervals not to exceed five years.

What must be maintained in a legible and current condition according to NFPA 70E, Article 205.2 for safe maintenance and LOTO procedures?

A single line drawing.

Which specific test is performed first to verify that a grounding electrode or system is adequately connected to ground?

A fall-of-potential test.

According to NFPA 70E, Article 210.3, current-carrying conductors must be maintained to conduct rated current without what?

Overheating.

What was the identified root cause of the arc flash incident in the LOTO case study involving a bus tie breaker?

The root cause was not just the worker; it involved mistakes by all parties including failed communication about reenergizing the circuit.

In the medium-voltage starter safety issue, why is neutral bonding on the contactor carriage frame considered a problem?

It allows electrical current to flow through an objectionable ground current path instead of only the normal neutral path.

When measuring dc resistance between a carriage frame and an enclosure, what value is used as a guideline for investigation?

Any value greater than $0.5\,\Omega$.

The test position on a medium-voltage starter allows the operation of the control circuit to be tested without doing what?

Energizing the connected motor.

According to OSHA 29 CFR 1910.269(n)(4), what is the minimum cable size for protective grounding equipment?

$No.\,2\,AWG$ copper.

When applying temporary protective grounding equipment after a voltage test in Metal Clad Switchgear ($1\,kV$ to $38\,kV$), what Hazard/Risk Category is required?

Category 4.

What special tool is required when clamping a ground to equipment that has been de-energized and removed from service?

A shotgun stick.

According to the 'Forgotten Workplace' article, what is the most common voltage involved in electrical fatalities?

$120\,Vac$.

Why is it dangerous to use a three-prong adapter in a two-prong home receptacle?

If the outlet has no grounding conductor, the adapter does not provide a functional ground, increasing the risk of shock or fire.

What are the primary sources of hazardous energy for medium- and high-voltage applications mentioned in the personal protective grounding article?

Direct energization from the power system, stored energy (capacitors/cables), static build-up, electromagnetic coupling, high-voltage testing, and back-feed.

According to OSHA 1910.269(n)(2), when can an employee work on lines or equipment as if they were de-energized?

Only after they have been de-energized and grounded according to the specified paragraphs.

When attaching grounds, which connection must be attached first according to safety procedures?

The ground-end connection.

What is an Energized Electrical Work Permit (EEWP)?

A written permit required when working within the limited approach boundary or arc flash boundary of exposed energized parts that are not in a safe work condition.

What are the exemptions for requiring an Energized Electrical Work Permit (EEWP)?

Tasks such as testing, troubleshooting, and voltage measuring performed by qualified persons.

According to Lynn Hamrick, an EEWP is recommended for switch operations under load if the arc-flash hazard is greater than what level?

Hazard Risk Category 2, or $8\,cal/cm^2$.

What phenomenon occurs when current flow causes a victim's hand to contract, making it impossible to release an energized object?

Electrical muscular paralysis.

What common item can be used as an 'uncommon insulator' to pull a victim away from a low-voltage circuit?

A leather belt or a shirt.

According to the FATALITY AND INJURY STATISTICS, what event accounts for $42\%$ of total workplace electrical deaths?

Contact with overhead power lines.

Under OSHA Subpart CC, what is the default clearance distance to maintain from overhead power lines if the voltage is up to $350\,kV$?

$20\,feet$.

How long does a utility have to provide requested voltage information under OSHA 1926.1408(B)(4)?

Two working days.

For power line safety above $350\,kV$, what is the minimum approach distance for cranes and derricks?

$50\,feet$.

Who has the authority to stop crane operations until a qualified person verifies it is safe to resume?

The operator.

What is the NEC definition of a 'Qualified Person'?

One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards.

According to NFPA 70E, how often must retraining be performed for qualified employees?

At intervals not to exceed three years.

What analysis must be used to determine the incident energy levels for selecting arc-rated clothing?

An arc flash hazard analysis.

What is the primary purpose of using insulated tools in conjunction with rubber gloves?

Insulated tools prevent an electrical arc flash caused by phase-to-ground or phase-to-phase contact, while gloves provide shock protection.

What are the four 'nuggets' of information found in Article 100 regarding arc-flash safety?

Arc-Flash Hazard, Informational Note No. 1, Informational Note No. 2, and Arc-Rated.

What did the ASTM F18 report conclude about arc-rated face shields exposed to arc plasma jets?

They are not affected in the same manner as fabric and do not have a reduced arc rating.

What is the estimated reduction in arc rating when fabric is hit by arc plasma jets at incident energies below $20\,cal/cm^2$?

Between $25\%$ and $50\%$.

What specific range of pressure is required for grounding set ferrules to ensure the cable does not pull out or the ferrule does not shatter?

A minimum of $2100\,lbs$ and a maximum of $3000\,lbs$.

According to MIL-HDBK-419A, the degree to which lightning protection is required is considered what type of decision?

A subjective decision.

What is the recommended maximum ground resistance from air terminals to ground for an industrial facility with sensitive equipment?

$5\,\Omega$.

Point-to-point continuity connections for lightning protection systems that are greater than what value should be investigated?

$0.5\,\Omega$.

Why should lubricants containing propane propellants be avoided on electrical equipment?

They have a very low Lower Explosive Limit (LEL) and can readily ignite in the presence of heat or a spark.

ASTM F1959 states that at the rated incident energy of arc-rated clothing, there is what probability of a second-degree burn?

$50\%$.

Why is it mandatory to wear a chin cup with an arc-rated face shield?

To prevent arc plasma from rolling up the chest and under the face shield.

What is the Lower Explosive Limit (LEL) for hydrogen gas generated as a by-product of battery reactions?

$4\%$.

What is the maximum distance an eye wash station should be located from a point of potential battery exposure?

$25\,feet$.

What specific solution should be used to neutralize an acid spill on the skin?

A mixture of one pound of baking soda to one gallon of clean water.

What are the five 'Rules' summarized in the 'Wearing PPE: Important or Not?' article?

1. Treat it like your life depends on it; 2. Layering reduces burns; 3. Inspect before use; 4. Know limitations; 5. Turn it off (Energized work as last resort).

What is the required frequency for periodic inspection of energy control (lockout/tagout) procedures according to OSHA 1910.147?

At least annually.

Which standard defines the four levels of competency for electrical testing technicians?

ANSI/NETA ETT-2000.

What organization serves as the accredited standards developer for ANSI to define the safety and reliability of electrical equipment?

InterNational Electrical Testing Association (NETA).

In the case of a battery explosion hazard, what specific eye protection must be worn at all times?

Chemical Resistant Goggles and a Face Shield.