Bus/Jumpers—Proper Handling, Installations Flashcards

1
Q

Copper is the material of choice for substation and switching yard bus work.

A

False

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2
Q

Workers making welded connections to substation aluminum bus work should be qualified in accordance with the ? Aluminum Construction Manual Section 7.2.4.

A

Aluminum Association

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3
Q

Before making a welded connection, the contact surface can be degreased by using ? .

A

non-toxic solvents

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4
Q

Before welding, a torch can be used to remove moisture from aluminum bus work joints, but the temperature should not exceed ? .

A

250°F

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5
Q

Only a stainless steel wire brush is to be used on substation aluminum bus work before making a welded connection to remove heat-treated oxide films.

A

false

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6
Q

Aluminum bus work welds are made by the gas metal-arc or gas ? welding process.

A

tungsten-arc

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7
Q

The shielding gas used when welding substation aluminum bus work is welding-grade ? , or a mixture of the two.

A

argon or helium

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8
Q

One problem with welding substation aluminum bus work is that the process is very dependent on weather conditions.

A

true

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9
Q

The manufacturer of substation bus work swaged connectors discussed is ? .

A

Deutsch

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10
Q

The swaged connections discussed provide a weather tight seal between the connector and the bus work with ? .

A

O-rings

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11
Q

Only minimal training is required before workers begin installing ? connections.

A

compression (swaged)

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12
Q

Which one of the following is an advantage in using swaged type connections?

A

They can be installed in any weather condition.

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13
Q

Before installation, all compression connectors are inspected to verify that ? has been applied to the fitting.

A

antioxidant compound

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14
Q

Angle (UABC) aluminum bus can be bent through an angle of 90° to its minimum inside radii.

A

False

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15
Q

Jumpers made from tube/pipe are used to connect the main substation transformer to the overhead bus because of their superior current carrying capacity.

A

False

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16
Q

The person responsible for assuring that every connection, jumper, and piece of substation bus work is properly installed is the ? .

A

Qualified Electrical Worker

17
Q

Filler wire used for all welds on substation aluminum bus work must be aluminum ? alloy.

A

4043

18
Q

Conventional bending tools can be used on seamless extruded aluminum pipe depending on alloy and ? .

A

temper

19
Q

Installation of Swage connectors can only be done during the dry weather.

A

False

20
Q

The construction costs associated with welded connections are usually less than with clamp type bolted connections.

A

True