SLTC FINAL TEST ACTUAL QUESTIONS AND

SLTC FINAL TEST (ACTUAL / ) QUESTIONS AND

VERIFIED CORRECT ANSWERS

Secondary voltage is also known as - ---answers_---low side or load

Distribution line consists of three main elements - --- answers_---primary, secondary, and services

Residentia customers are typically served with what voltage - ---answers_---120/240 single phase

These are also low voltage but will run from pole to customer on overhead systems and from pedestal to customers on undergroud systems - ---answers_---services

Oil provides two major functions - ---answers_---1. Cooling

• Insulating

T/f: a transformer will not work on dc - ---answers_---true

T/f: primary is the source and secondary is the load - ---

answers_---true

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T/f: copper has the highest conductivity of the commercial

metals and is also most popuar material used - ---answers_- --true

Two basic types of distribution transformers - ---answers_---

• Overhead
• Underground

T/f: overhead transformers are also known as pole mounted -

---answers_---true

Underground transformers come in three configurations - --- answers_---1. Vault

• Submersible
• Pad mounted

T/f: h1 is always on the left and h2 is always on the right - ---

answers_---true

T/f: the conentional transformer needs external protective

fused device - ---answers_---true

Csp - ---answers_---completely self protected Equipped with external lightning arrestor Internal fuse

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T/f: the pressure relief valve on an underground transformer

is used to relieve internal pressure before opening bay-o-net fuse - ---answers_---true

When the bay-o-net fuse is removed what side will be de- energized - ---answers_---secondary

Difference between additive and subtractive - ---answers_--- additive = l to r x3, x2, x1 Subtractive = l to r x1, x2, x3

Know how to do your vectors - ---answers_---wye = parallel Delta = series

T/f: only takes 1/3 of an amp to kill you - ---answers_---true

Most important element in any work practice or process when working on an electrical high-voltage system - ---answers_-- -safety

These practices provide the best opportunity to avoid injury to the lineworker and are intended to - ---answers_---1. Limit the amount of current flow and voltage drop across the lineworker's body

• Minimize the time that the current could flow through the

lineworker's body

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The human body is an excellent conductor because - --- answers_---it is made of 70% water

T/f: osha requires temporary protective grounds shall be

placed at such locations and arranged in such a manner as to prevent each employee from being exposed to hazardous differences in electrical potential - ---answers_---true Osha 1910.269

T/f: the principles of personal protective grounding equipment

remain the same for all applications in overhead and underground - ---answers_---true

• accepted methods of protection for a lineworker to keep

from being energized - ---answers_---1. Insulation

• Isolation
• Personal protective grounding

The only way to completely prevent current flow through a lineworkers body while contacting an energized line is to properly what - ---answers_---insulate and isolate

What is the best method of protecting lineworkers while working on de-energized lines and equipment - ---answers_- --equipotential zone bonding

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