Lesson 12

Question 1

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

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Introduction,” Paragraph 1, Sentence 1

Answer 1

False

Question 2

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

a. Aircraft Aluminum
b. Aluminum Association
c. American Welding Guild
d. Welding Research Guild

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 1, Sentence 1

Answer 2

b. Aluminum Association

Question 3

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

a. acetone
b. lacquer thinner
c. mineral spirits
d. non-toxic solvents

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 1, Bullet 3

Answer 3

d. non-toxic solvents

Question 4

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

a. 250°F
b. 300°F
c. 350°F
d. 400°F

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 1, Bullet 2

Answer 4

a. 250°F

Question 5

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.

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 1, Bullet 5

Answer 5

False

Question 6

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

a. heli-arc
b. oxyacetylene
c. plasma
d. tungsten-arc

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 1, Last Bullet, Sentence 1

Answer 6

d. tungsten-arc

Question 7

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

a. acetylene or hydrogen
b. argon or helium
c. methyl acetylene or allene
d. xenon or butane

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 1, Last Bullet, Sentence 2

Answer 7

b. argon or helium

Question 8

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

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Welding Pipe and Tube Aluminum,” Paragraph 2, Sentence 1

Answer 8

True

Question 9

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

a. Ampact
b. Anderson
c. Burndy
d. Deutsch

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 1, Sentence 2

Answer 9

d. Deutsch

Question 10

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

a. neoprene gaskets
b. O-rings
c. pipe dope
d. silicone grease

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 1, Last Sentence

Answer 10

b. O-rings

Question 11

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

a. brazed aluminum
b. compression (swaged)
c. exothermic
d. MIG welded

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 2, Bullet 2

Answer 11

b. compression (swaged)

Question 12

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

a. It is simple to modify or add to the bus work.
b. The required compression tools are inexpensive.
c. They can be installed in any weather condition.
d. This type of connection is the most aesthetically pleasing.

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 2, Bullet 3

Answer 12

c. They can be installed in any weather condition.

Question 13

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

a. antioxidant compound
b. die release agent
c. silicone grease
d. swage lube

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 2, Sentence 2

Answer 13

a. antioxidant compound

Question 14

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

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Angle and Bus Bar,” Paragraph 1, Sentence 2

Answer 14

False

Question 15

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

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Introduction,” Paragraph 1, Sentences 1-2

Answer 15

False

Question 16

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

a. engineer
b. job site supervisor
c. manufacturer
d. Qualified Electrical Worker

Reference: Bus/Jumpers—Proper Handling, Installations, “Conclusion,” Paragraph 1, Last Sentence

Answer 16

d. Qualified Electrical Worker

Question 17

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

a. 2330
b. 3560
c. 4043
d. 5060

Substation Construction Guidelines Textbook, Chap. 6, Pg. 160, “Connections to Buses,” Paragraph 6, Sentence 1

Answer 17

c. 4043

Question 18

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

a. diameter
b. length
c. manufacturer
d. temper

Reference: Bus/Jumpers—Proper Handling, Installations, “Bending Aluminum Pipe,” Paragraph 1, Sentence 2

Answer 18

d. temper

Question 19

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

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 2, Bullet 3

Answer 19

False

Question 20

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

True or False?

Reference: Bus/Jumpers—Proper Handling, Installations, “Swaging Technique,” Paragraph 2, Bullet 4

Answer 20

True