CEA Jobsite Safety Procedures Questions and Answers

Question 1

An apprentice is setting up a non-self-supporting extension ladder to access a junction box on a wall. To ensure stability and meet OSHA requirements, what is the proper ratio of the ladder's working length to the set-back distance from the wall?

Accepted Answer

4 to 1

Answer

According to OSHA, a non-self-supporting ladder, like an extension ladder, should be set up at approximately a 75.5-degree angle. This is achieved by following the 4 to 1 rule: for every 4 feet of working ladder length, the base of the ladder should be 1 foot away from the wall or vertical surface.

Question 2

During a job briefing, the supervisor discusses the need to de-energize a 480V motor control center for maintenance. Which of the following is the first and most critical step in the Lockout/Tagout (LOTO) procedure?

Accepted Answer

Notify all affected employees of the impending shutdown.

Answer

The first step in a Lockout/Tagout procedure, as outlined by OSHA, is preparation and notification. Before any equipment is shut down, all affected employees (operators, personnel in the area) must be notified that a LOTO procedure is about to begin.

Question 3

An electrical apprentice is tasked with performing voltage measurements on an energized circuit panel, which has been determined to be a PPE Category 2 hazard. What is the minimum arc rating for the personal protective equipment (PPE) required for this task?

Accepted Answer

8 cal/cm²

Answer

NFPA 70E, the Standard for Electrical Safety in the Workplace, defines PPE Category 2 as requiring arc-rated clothing and equipment with a minimum arc rating of 8 cal/cm². This category is common for tasks like voltage testing on 480V panels.

Question 4

While working on a construction site, an apprentice notices an extension cord with a missing grounding prong being used to power a saw. What is the appropriate action to take?

Accepted Answer

Immediately remove the cord from service and report it to a supervisor.

Answer

Using damaged electrical equipment, such as an extension cord with a missing grounding prong, poses a serious shock hazard. The grounding prong is a critical safety feature. The proper procedure is to immediately stop using the cord, remove it from service, and inform a supervisor so it can be properly repaired or replaced.

Question 5

Which of the following materials is required for the side rails of a portable ladder being used by an apprentice near exposed energized electrical equipment?

Accepted Answer

Nonconductive material, like fiberglass

Answer

OSHA regulations explicitly state that portable ladders must have nonconductive side rails, such as those made of fiberglass, if they are used where the employee or the ladder could come into contact with exposed energized electrical equipment.

(CEA) Certified Electrical Apprentice Practice Test

(CEA) Certified Electrical Apprentice Practice Test

CEA Jobsite Safety Procedures Questions and Answers