ASP Electrical Safety 2

Question 1

Which of the following best describes the 'arc flash boundary' according to NFPA 70E?

Accepted Answer

The distance at which the incident energy equals 1.2 cal/cm², the onset of a second-degree burn

Answer

The distance a worker must stand from any electrical panel

Answer

The area requiring arc-rated clothing rated at PPE Category 4

Answer

The boundary within which only licensed electricians may work

Question 2

Under NFPA 70E, an Energized Electrical Work Permit is required when:

Accepted Answer

Work must be performed on or near exposed energized electrical conductors and the equipment cannot be de-energized

Answer

Any worker enters a room containing electrical panels

Answer

Replacing a light bulb in an energized fixture

Answer

Testing a de-energized circuit with a voltmeter

Question 3

Electrical equipment located in a Class I, Division 1 hazardous location contains:

Accepted Answer

Flammable gases or vapors present in ignitable concentrations under normal operating conditions

Answer

Combustible dust that can ignite when suspended in air

Answer

Ignitable fibers or flyings that are handled or stored on the premises

Answer

Radioactive materials requiring special shielding

Question 4

The primary cause of electrical fires in the workplace is:

Accepted Answer

Overloaded circuits, damaged wiring, or loose connections generating heat

Answer

Improper use of personal protective equipment

Answer

Failure to install GFCI protection in wet locations

Answer

Use of extension cords with three-prong plugs

Question 5

What does the 'hierarchy of controls' recommend as the most effective means of protecting workers from electrical hazards?

Accepted Answer

Elimination of the hazard by de-energizing equipment before work begins

Answer

Providing arc-rated PPE to all electrical workers

Answer

Installing warning signs near electrical panels

Answer

Training workers to recognize electrical hazards

Question 6

Temporary wiring used on construction sites under OSHA 29 CFR 1926.405 must be protected from damage and:

Accepted Answer

Supported and secured in place at intervals not exceeding 10 feet for cables

Answer

Replaced every 30 days regardless of condition

Answer

Rated at no more than 120 volts

Answer

Used only in dry locations without GFCI protection

Question 7

Which PPE is considered the last line of defense against electrical shock and arc flash hazards?

Accepted Answer

Arc-rated clothing, face shields, rubber insulating gloves with leather protectors, and safety footwear

Answer

Hard hats and safety glasses only

Answer

Cotton clothing and leather gloves

Answer

High-visibility vests and steel-toed boots