Nicet Highwa y Construction Le vel 2
1.What are the 5 types of bridg e abutments? Closed Ab ut-
ment, Stub or Perched Ab ut-
ment, Pedestal or Spill-through Abutment, Integral End Bents , Me-
chanically Stabi-
lized Abutment
2.What is a " closed abutment"? A closed abutment is a full-height wall with wing w alls on each side that re-
tains the full height of the approach embankment. This type of ab utment minimizes the re-
quired span length of the bridge.
3.What is a stub or per ched abutment? A stub or perched abutment is a rel-
atively short abut-
ment that is con-
structed after the embankment has been completed. The embankment can be compact-
ed without inter-
ference from the abutment.
4.What are P edestal or spill-thr ough abutments? Pedestal or spill-through ab ut-
ments are shor t stub-type ab ut- Nicet Highwa y Construction Le vel 2
ments suppor ted on pedestals or columns e xtend-
ing to the natur -
al ground. As with closed ab utments, the abutment must be constructed be-
fore the approach embankment.
5.What are Integral End Bents? Integral end bents are stub ab ut-
ments that are rigidly connected to the superstr uc-
ture without e x-
pansion joints. The connection is de-
signed for full transfer of thermal stresses from the bridge deck to the abutment.
6.What is a Mec hanically Stabiliz ed Abutment? Mechanically sta-
bilized walls, also have been used to suppor t bridge abutments. The bridge seat and footing are sup-
ported directly on the reinf orced backfill.
7.What is a bridg e abutment? A bridge abutment is a substr ucture that suppor ts one Nicet Highwa y Construction Le vel 2
terminus of the superstructure of a bridge and, at the same time , laterally suppor ts the embankment which ser ves as an approach to the bridge.
8.On a rural highwa y, the construction sign should be placed ho w far away from the pa vement?6 to 12 feet
9.When casting concrete c ylinders, the cylinders shall be fabricated within how many minutes of sampling?3 minutes
10.What apparatus is required when using a stan-
dard method to determine air content b y volumetric method?A mallet, a hemi-
spherical tipped tamping rod and a syringe.
11.The sealer for protective treatment of concrete pave-
ment can be applied with no harmful effect even if the concrete is:Still green.
12.How much weight should saf ety railing suppor t?200 lbs in any di-
rection.
13.How thick must top rails and mid rails be on guardrail?At least 1/4" thic k
14.According to OSHA requirements, how far abo ve the walking surface does a top rail on a guardrail have to be?Between 39" and 45"
15.T/F A critical path method means ho w fast a pr oject can be completed. It does not include any float days.True
16. 1/4"
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