Journeyman Electrician Practice Exam

Disable ads (and more) with a membership for a one time $4.99 payment

Prepare for the Journeyman Electrician Exam. Test your skills with multiple-choice questions designed to help you succeed. Each question comes with hints and detailed explanations to assist in your study process.

Practice this question and more.

All wiring installed in or under an aircraft hangar floor must comply with which class location?

Class I, Division II
Class II, Division I
Class I, Division I
Class III, Division I

The correct answer is: Class I, Division I

Wiring installed in or under an aircraft hangar floor must comply with Class I, Division I requirements due to the presence of flammable vapors and gases associated with fuel, solvents, or other materials often found in this environment. Class I locations are specifically defined as areas where ignitable concentrations of flammable gases or vapors can exist under normal operating conditions. In an aircraft hangar, the risk of exposure to such hazardous materials is significant, thus necessitating strict compliance with these safety standards to prevent potential ignition sources from electrical equipment. This ensures that all wiring and enclosed electrical equipment are designed to contain any sparks or arcs, reducing the chances of an explosion or fire in these critical areas. Understanding the classification of hazardous locations is crucial for electricians to ensure that installations are conducted safely and in accordance with regulatory requirements.