NHI SAFETY INSPECTION OF IN-
SERVICE BRIDGES FINAL EXAM |
147 QUESTIONS | WITH CORRECT
SOLUTIONS!!
Clacking - correct answers--the sound of delaminated concrete
Pinging - correct answers--the sound of "sound" concrete
Where are shear key joints? - correct answers--between pre-cast deck panels
, Where can you find anchorage zones? - correct answers--precast deck tie rods
flexure cracks are primarily what direction compared to the primary reinforcement? -
correct answers--perpendicular
Main inspection area for FRP bridges? - correct answers--Joints
Assembly joint without seal- sliding plate - correct answers--two steel plates sliding on
top of one another with maximum movement of 4 inches
Compression joint seal - correct answers--rectangle of neoprene with a honeycomb
cross section. Can handle movement of 2 inches
pourable joint seal - correct answers--made of three materials (backing material, joint
filler, and a poured joint sealant) and can only accommodate movement of 1/4 inch.
Used on short spans
strip seal expansion joint - correct answers--two slotted steel anchorages cast into a
deck or back wall. A neoprene seal fits into the grooves to span the joint. max
movement of 4 inches
Cellular joint seal - correct answers--different than compression because of material
used to close joint. Made up of closed-cell foam that allows the joint to move in different
directions. Allows for both parallel and perpendicular joint movement
Assembly joint with seal- plank - correct answers--steel reinforced neoprene that
supports vehicular loads over the joint and allow for movement up to 4 inches
Assembly joint with seal- sheet - correct answers--two blocks of steel reinforced
neoprene. thin sheet of neoprene spans the joint and connects the two blocks. Allows
for up to 4 inches
open expansion joint - correct answers--gap between the bridge deck and the back wall
of the abutment or adjacent deck section. usually found on short span bridges, usually
unprotected
Assembly joint without seal- finger plate - correct answers--tooth plate joint, two steel
plates that have interlocking fingers. usually on longer spans. can accommodate
movement from 4 to 24 inches
drainage system - correct answers--move water away from specific locations (to protect
the bridge)
grade and cross slope - correct answers--directs the runoff to the inlets and helps
eliminate or reduce ponding
SERVICE BRIDGES FINAL EXAM |
147 QUESTIONS | WITH CORRECT
SOLUTIONS!!
Clacking - correct answers--the sound of delaminated concrete
Pinging - correct answers--the sound of "sound" concrete
Where are shear key joints? - correct answers--between pre-cast deck panels
, Where can you find anchorage zones? - correct answers--precast deck tie rods
flexure cracks are primarily what direction compared to the primary reinforcement? -
correct answers--perpendicular
Main inspection area for FRP bridges? - correct answers--Joints
Assembly joint without seal- sliding plate - correct answers--two steel plates sliding on
top of one another with maximum movement of 4 inches
Compression joint seal - correct answers--rectangle of neoprene with a honeycomb
cross section. Can handle movement of 2 inches
pourable joint seal - correct answers--made of three materials (backing material, joint
filler, and a poured joint sealant) and can only accommodate movement of 1/4 inch.
Used on short spans
strip seal expansion joint - correct answers--two slotted steel anchorages cast into a
deck or back wall. A neoprene seal fits into the grooves to span the joint. max
movement of 4 inches
Cellular joint seal - correct answers--different than compression because of material
used to close joint. Made up of closed-cell foam that allows the joint to move in different
directions. Allows for both parallel and perpendicular joint movement
Assembly joint with seal- plank - correct answers--steel reinforced neoprene that
supports vehicular loads over the joint and allow for movement up to 4 inches
Assembly joint with seal- sheet - correct answers--two blocks of steel reinforced
neoprene. thin sheet of neoprene spans the joint and connects the two blocks. Allows
for up to 4 inches
open expansion joint - correct answers--gap between the bridge deck and the back wall
of the abutment or adjacent deck section. usually found on short span bridges, usually
unprotected
Assembly joint without seal- finger plate - correct answers--tooth plate joint, two steel
plates that have interlocking fingers. usually on longer spans. can accommodate
movement from 4 to 24 inches
drainage system - correct answers--move water away from specific locations (to protect
the bridge)
grade and cross slope - correct answers--directs the runoff to the inlets and helps
eliminate or reduce ponding
