Level 4, Module 11 Medium Voltage terminations/splices

Materials typically used for cable jackets include neoprene, lead, and _____.

PVC

Which of the following termination classes is the only one that provides a seal against external elements?

Class 1

Insulation must protect from flashover damage and _____.

tracking damage

Which of the following is the recommended abrasive cloth used to clean cable during a splice?

120-grit abrasive cloth

Acceptance testing calls for a maximum value of what percentage of the factory test voltage?

80%

A quick test that can be made to determine if an installation is good is known as a(n) _____.

go/no-go test

A knee in a leakage current-versus-voltage plot indicates a _____.

breakdown current

Proof tests are made at what percentage of the original factory voltage?

60%

A suitable connector for medium-voltage cable splices is a compression or _____.

crimp type

When conducted properly, which of the following will indicate faults such as cracks, discontinuity, thin spots, and faulty terminations?

Hi-pot test

To finish a splice and ensure complete protection, it should be covered with how many layers of vinyl electrical tape?

Four

Two methods used to provide stress control for medium-voltage cable terminations are geometric and _____.

capacitive

Insulation shielding performs all of the following functions, except

protecting the insulation from the elements

Which of the following materials is not likely to be used for a cable jacket?

Nylon

The outer shielding in a medium-voltage cable is best described as

a semi-conductive layer under a metallic layer

Which of the following best describes a medium-voltage termination?

An insulator

Compressed stranding is compressed to what percentage of the concentric conductor diameters?

97%

When testing insulation resistance, the ratio of the insulation resistance at the end of 10 minutes to the insulation resistance at the end of one minute is called the

polarization index