The two most common types of foundations used in substations and switchyards are drilled shafts and ____.
a. driven piles
b. rock anchors
c. slabs on grade
d. spread footings
Reference: Equipment Foundations, “Foundation Types,” Paragraph 1, Sentence 2
c. slabs on grade
If the soil is wet or sandy, ____ are often used to prevent a cave in before and during the pour.
a. caissons
b. sheet piling
c. shoring
d. trench boxes
Reference: Equipment Foundations, “Drilled Shafts (Piers),” Paragraph 3, Sentence 3
a. caissons
The specification that covers zinc coatings applied by the hot-dip process to steel hardware is the ____ standard.
a. ACI-818
b. ASTM A153
c. ASTM A615
d. CRSI MSP-2-01
Substation Construction Guidelines Textbook, Chap. 5, Pg. 127, “Reference,” Sentence 1
b. ASTM A153
A substation control house will typically have a ____ foundation.
a. pier
b. precast
c. slab on grade
d. spread footing
Reference: Equipment Foundations, “Slab on Grade,” Paragraph 1, Sentence 2
c. slab on grade
A cost-effective foundation requiring less excavation and backfilling, and little or no forming, is the ____ type.
a. auger drilled pier
b. rock anchor
c. sheet pile
d. spread footing
Substation Construction Guidelines Textbook, Chap. 5, Pg. 129, “Foundation Forms,” Paragraph 4, Sentences 1-2
a. auger drilled pier
If a casing is used when pouring a foundation, it is not removed until the concrete has set for 24 to 48 hours.
True or False?
Substation Construction Guidelines Textbook, Chap. 5, Pg. 129, “Foundation Forms,” Paragraph 4, Sentences 5-6
False
The collection pits installed around oil-filled substation equipment are a requirement of the ____.
a. ANSI
b. ASTM
c. EPA
d. OSHA
Substation Construction Guidelines Textbook, Chap. 5, Pg. 129, “Foundation Forms,” Paragraph 5, Last Sentence
c. EPA
Reinforcing steel (rebar) comes in ____.
a. Category A, B, and C
b. Class 1, 2, and 3
c. Grade 40, 50, and 60
d. Rate 100, 200, and 300
Substation Construction Guidelines Textbook, Chap. 5, Pg. 130, “Anchor Bolts, Embedded Items,” Paragraph 6, Sentence 2
c. Grade 40, 50, and 60
After adding the mixing water, concrete should be poured within ____. Concrete that has begun to set should be rejected.
a. 1 hr
b. 1 ½ hrs
c. 2 hrs
d. 2 ½ hrs
Substation Construction Guidelines Textbook, Chap. 5, Pg. 131, “Mixing and Placing Concrete,” Paragraph 3, Sentence 1
b. 1 ½ hrs
The soil underneath a slab on grade should be thoroughly mixed and compacted to ____ of the density of undisturbed soil.
a. 75%
b. 85%
c. 95%
d. 105%
Reference: Equipment Foundations, “Slab on Grade,” Paragraph 3, Sentence 1
c. 95%
It is acceptable for a slab on grade to be poured on top of site stone.
True or False?
Reference: Equipment Foundations, “Slab on Grade,” Paragraph 3, Sentence 2
False
The steel used to manufacture rebar can be billet-steel, rail-steel, or ____.
a. axel-steel
b. plow-steel
c. ship-steel
d. tool-steel
Substation Construction Guidelines Textbook, Chap. 5, Pg. 130, “Anchor Bolts, Embedded Items,” Paragraph 6, Sentence 3
a. axel-steel
The reason rebar is normally placed in the shape of a grid is so that it can counter the stresses applied to the concrete in only a downward direction.
True or False?
Reference: Equipment Foundations, “Slab on Grade,” Paragraph 4, Sentence 1
False
After completion of the concrete pour and vibration, the next step is to ____.
a. perform a slump test
b. re-check the anchor bolts for location and alignment
c. screed excess concrete from the surface
d. smooth the surface with a float
Substation Construction Guidelines Textbook, Chap. 5, Pg. 127, “Installation,” Paragraph 2, Last Sentence
b. re-check the anchor bolts for location and alignment
A properly built transformer or oil switch foundation must be capable of withstanding compression and ____ loads.
a. overturning
b. shear
c. tension
d. torsion
Reference: Equipment Foundations, “Conclusion,” Paragraph 1, Sentence 2
a. overturning
When hydraulic jacks are used to raise and level the main power transformer on a slab, point loads or ____ loads are generated.
a. comprehension
b. shear
c. strain
d. tension
Reference: Equipment Foundations, “Conclusion,” Paragraph 1, Sentence 3
a. comprehension
If water cannot be removed or if the concrete is to be dropped vertically more than six feet, the use of a ____ may be implemented. This is the preferred method of pouring a drilled pier.
a. chute extension
b. dump hopper
c. mud jacking pump
d. tremie pipe
Substation Construction Guidelines Textbook, Chap. 5, Pg. 131, “Mixing and Placing Concrete,” Paragraph 4, Sentence 2
d. tremie pipe
The use of ____ conduit or hardware in a concrete foundation must be avoided.
a. aluminum
b. brass
c. copper
d. galvanized iron
Substation Construction Guidelines Textbook, Chap. 5, Pg. 129, “Site Preparation,” Note
a. aluminum
If a foundation anchor bolt is too short, it is acceptable to weld an extension on it.
True or False?
Substation Construction Guidelines Textbook, Chap. 5, Pg. 130, “Anchor Bolts, Embedded Items,” Paragraph 2, Sentence 3
False
Templates are used to accurately locate anchor bolts. The acceptable positioning tolerance is within ____.
a. ¹/₁₆”
b. ⅛”
c. ³/₁₆”
d. ¼”
Substation Construction Guidelines Textbook, Chap. 5, Pg. 130, “Anchor Bolts, Embedded Items,” Paragraph 2, Sentence 2
a. ¹/₁₆”
