Tesy 3-4

Circuit condition information is provided to relays and metering by ---

current and potential transformers

The most common bolted connections in a substation joins a conductor to a ---?

equipment terminal

The size of a substation located at a generating plant is proportional to the ----?

generator output voltage

The following drawing is an ---?

loadbreak switch

In order to properly acquire aluminum bolts in a substation, the bolts must be properly ----?

lubricated

Substation superstructures can be made of aluminum (alloy) steel, or ----?

precast concrete

When splicing a medium- voltage cable. The tape that is used on the conductor and over the insulation is ----? Tape.

semiconducting

The two functions of the glaze on a porcelain insulator are to help bead water and ----?

shed dirt

To verify that the concrete being used on a substation foundation meets the required consistency, a --- test should be performed.

stamp

When building a form around an area to be grouted, the form for the grout can be made---? With the use of caulking, silicon scalant, or damp sand.

water tight

A low resistance, well- designed and well constructed ground grid is necessary to provide improved -----?

worker safety

The ground grid is a distribution substation is typically made with ---- copper wire

1/0

Pour concrete _______ after mixing

1/2 hour

In an energized substation yard, the minimum clearance between the lines (rated 50 kilovolts or below) and any part of a crane or other equipment is ---?

10'

The ground grid for a transmission substation is typically made from bare copper in a grid pattern with conductors spaced about ----? Apart.

10'

In outdoor substations, the grid is buried ----? Below subgrade, then the substation surfacing of three to six inches of crushed stone is placed.

12-24"

The number of cap and pin units required in a string of suspension for a 240- kilovolt line is typically -----?

14

OSHA regulation part ---? Covers construction in energized substation.

1926

When bolting substation steel structures together, the bolts are seen protruding through the nut.

2

Hard hats worn by electrical workers are tested at ---?

20,000 V

Fall protection is required when climbing or working on structures above --- inside substations

4

Safety regulations require workers to add in additional ---? For every 10 kilovolts above the baseline 50- kilovolt approach distance measurement. This works out to be 16 feet for 230 kilovolts

4"

On the grout pouring side of a form, a slanted delivery board at approximately ---- is used. This board extends approximately six inches above the bottom surface of the face plate.

45"

To help cure grout, leave the grout undisturbed for at least?

48 hours

A qualified worker must maintain a minimum ---? Working distance when working on or near an energized 230 = Kilovolt line.

5'3"

To aid in the curing process of a freshly poured concrete pad, a ----?

A plastic sheet that acts as a vapor barrier should be used to cover the pour.

The oldest and most common type of substation is the --- type?

Air-insulated

Why is rebar deformed?

Allows concrete to grip bars more effectively

The symbol is used for an ---?

Bushing- type current transformer

What do you mark each end of wire with after pulled

Cable ID tag

It is hazardous to touch a cable conductor after a high voltage test has been completed because the cable is basically a ----? And will have voltage on it after a high voltage test is complete.

Capacitor

To counterbalance excessive induction reactance produced by customer loads ---- can be installed in substation.

Capacitor Banks

The load on a substation transformer is removed by opening the ---?

Circuit Breaker

In substation drawings, letters are added to substation device numbers to ---?

Further define the device

The part of the OSHA regulations that mandates each employee complies with all rules, regulations and orders issued pursuant to the act is in the ---?

General duty clause

OSHA initiates public - privater partnerships which identify ----? And encourage their use nationwide for our industry, the ET & D partnership was created.

Hazard Mitigations

If the electric field becomes concentrated in any one point of a cable's -----? The electrical stress in that location will lead to eventual insulation failure.

Insulation

After a substation transformer has been de- energized, the --- prove isolation and ensure back feed will not occur.

Load side disconnect switches are opened

If pin cap insulators are used in a substation, they are used on the?

Low voltage side

Any oil-filled equipment stored within the substation fence must have a ----? That will hold 1.6 times the oil contained in the largest piece of equipment stored.

Plastic container

Before grout what does the concrete slab need to be like?

Rough

Circuit breakers that have advantages of smaller size and are more suitable for indoor installation are the vacuum or --- types

SF, gas

The type of insulator use in substations to support conductors/ bus and switch gear is the -----? Type insulator.

Solid post

At substations, high voltage surges that appear on the electrical system are shunted to ground by ---?

Surge arresters

Substations without transformers are reffed to as ----?

Switchyard

Aluminum substation buses are welded using MIG or --- Unit.

TIG

A ----? Is used to ensure that the anchor bolts are accurately located in a concrete foundation.

Template

Install a ------? In each relay to isolate it from the rest of the circuit. This allows application of current and/ or voltage to the relay without affecting anything else in the circuit.

Test plug

The advantage of polymeric hollow post insulators have over porcelain is that?

They don't shatter and produce shrapnel

The bolts of a steel structure in a substation yard should be acquired ----?

after all the bolts are set in place

When doing masonry work in a substation, you should not let any grout touch your skin. Grout can cause ------?

alkali burns

Upon completion of a concrete pour, you should recheck the ----?

anchor belts for correct location and elevation

When building a collection pit for spill prevention in a substation, the pit can be lined with ----? To hold the oil in case of a spill.

bentonite clay

When working in a substation and trying to determine the size, type, and starting and finishing point of a control cabler run, you should refer to the ----?

cable schedule

When assembling a substation structure, all surfaces that will be in permanent contact with each other after assembly should be -----?

cleaned

The first and most effective action after a spill is to ---?

contain the field before it seeps into water soil