NCCER Electrical Practice Test Questions and Correct Answers

High-voltage rubber gloves are required to be tested by a certified lab once... Every six months The major cause of death from electric shock is... Fibrillation of the heart The main factor that determines the outcome of electric shock is... The amount of current According to OSHA, portable tools and appliances do not need to be grounded... If they have an approved system of double insulation All electrical lines should be considered...until otherwise determined. Energized The minimum distance for a 1kV conductor is... 1ft 6in Batteries can be an explosion hazard because... Hydrogen mixed with air is explosive in the proper concentration The main requirement for an employee to enter a confined space is to... Be trained in confined space entry procedures Portable electric hand tools account for a large number of shock injuries, the majority of these can be prevent by... Proper grounding of tools When using a straight ladder, the side rails should extend at least...above the top support point. 36 inches ...are intended for the electrical protection of personnel. GFCIs What voltage is considered high voltage? 600V or more ...rubber gloves are used for application up to 1000V. Class 0 The first step to be completed before working on a circuit is to ___ Check that the circuit is tagged and locked out. The OSHA standards for electrical utilization systems are covered in... 1910 and 1926