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Safe Electrical Work Practices & 2015 NFPA 70E – E4758E

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1

Which of the following approach boundaries is not established for shock protection?

the limited approach boundary
the arc flash boundary
the restricted approach boundary

2

The approach boundary distances for shock protection are dependent on the nominal system voltage in AC systems and on the potential difference in DC systems.

true
false

3

It takes approximately 1.2 calories per square centimeter of thermal energy to cause the onset of a ______________________ burn on unprotected skin.

first-degree
second-degree
third-degree

4

Which of the following is not a critical factor when calculating incident energy?

the equipment manufacturer
available short-circuit current
speed of overcurrent protection

5

To provide an appropriate level of protection, arc-rated clothing and protective equipment must be selected to meet or exceed the incident energy level of a potential arc flash at the ____________.

outermost boundary
restricted approach boundary
working distance

6

Owners of electrical equipment are not required by the NFPA 70E to install field-labels on equipment.

true
false

7

When should a voltage test instrument be verified to be working properly?

immediately prior to testing
immediately after testing
both immediately prior to testing and immediately after testing