Foundations
Which of the following piles would have the lowest capacity based on the strength of the material it is made from?
Tiber Piles
Which is among the identification marks found on steel reinforcing bars?
bar size, type of steel, grade of steel and symbol for producing mill
What ingredient in a batch of normal weight concrete makes up from 60 to 80% of the volume?
aggregates
One of the videos you were required to watch showed the ease with which the Peri form system can be erected and taken down. What type of structural member were the forms being set up to pour?
Floor Slab
When a slab is placed and finished, which of the following operations comes immediately after the concrete is screeded?
bull floating
Which of the following loads would make it necessary to have uplift piles in a deep foundation?
Wind load
which concrete elements would welded wire fabric most likely be used for reinforcing?
floor slabs
Which is the main reason for using a superplasticer in a concrete mix?
to increase the slump without adding water
what admixtures is specifically designed to improve the durability of concrete to be used in a bridge deck that will be exposed to harsh New England winter conditions?
air entertainer
The object of broom finishing a concrete slab is to
Produce a skid resistant wearing surface
a metal spacer used to hold wall forms in place a set distance apart as concrete is placed; they remain in the concrete after the forms are removed, except for their ends which are broken off by applying a twisting motion.
Snap tie
The name for the smaller bars that wrap around the main reinforcement in a beam. They help to carry tension in the concrete caused by shearing and bending stresses
stirrups
What type of portland cement should be used in a concrete mix when the concrete must gain strength as fast as possible so that a contractor can strip forms as soon as possible?
type III
when elevated slabs are constructed, these are put in place after the formwork has been stripped to provide support to the concrete as it continues to gain strength.
re shores
When a slab is being placed and finished, screeding is done using a
straight edge
when concrete for beams and slabs is being placed, these are used to kee-p the reinforcing up off the forms so that concrete flows underneath the bars to the required depth.
chair
Who prepares the shop drawings for rebar?
fabricator
Which type of portland cement is used when a moderate level of sulfate resistance is required as is often the case with sidewalks in new England that must stand up to the use of deicing salts in the winter?
type ii
a method of placing low slump concrete that involves spraying it from a nozzle at a high speed using compressed air.
shotcreting
what can result from over consolidating the concrete at the time it is placed?
Segregation of the mix
a liquid applied to formwork facing before concrete is cast to prevent the hardened concrete from adhering to it when the forms are stripped.
Form Oil
these are used as reinforcing in round concrete piers and columns to prevent the vertical bars from buckling.
spirals
Which type of portland cement is used in a concrete mix when a large mat foundation must be poured and heat buildup within the mat is a concern and must be kept as low as possible?
type iv
When a concrete slab is being placed and finished, which of the following steps cannot be started until most of the bleedwater has evaporated?
finishing with a power trowel