Name *

First Name

Last Name

1) The increased variety and size of structures made with concrete was advanced most significantly by: *

a) nineteenth century experimentation by the Quartermaster General

b) construction of the Erie Canal

c) Ernest Ransom’s work on reinforcing bars and cement kilns

d) none of the above

2) Examples of concrete features that may contribute to the historic character of a structure include: *

a) cast interior ornament

b) lift lines and cold joints

c) exposed concrete structural components of a “factory style” building

d) all of the above

3) Factors that may cause corrosion of the steel reinforcing used in concrete include all of the following except: *

a) failure to sufficiently wash beach sand used as an aggregate in the original construction

b) the presence of an oxide layer on the steel

c) exposure of the steel to water vapor

d) use of calcium chloride set accelerator in the original construction

4) Dormant cracks that are not structural in nature still usually require repair to address concerns over moisture penetration. *

True

False

5) An initial assessment of a historic concrete building or building feature usually includes: *

a) review of documentation regarding the original construction and subsequent treatments

b) determination of whether the feature can be repaired or should be replaced

c) onsite non-destructive testing in a conservation laboratory

d) a and c

6) The cleaning treatment for soiling of a sound concrete surface that is least likely to alter or damage that surface is: *

a) low-pressure water cleaning

b) chemical surface cleaning

c) micro-abrasive cleaning

d) none of the above

7) Testing proposed repair approaches allows the preservation team to refine a treatment that ensures compatibility with the historic materials and achieves a level of desired durability before work begins. *

True

False

8) Trowel-applied parge coatings are recommended when repairing formed concrete *

True

False

9) An active thermal crack in a highly-visible area of the building may best be treated by: *

a) introducing elastomeric sealant that compresses and expands as the crack moves

b) injecting epoxy into the crack

c) filing the crack with a cementitious repair mortar that may in time require replacement

d) none of the above, thermal cracks can usually be left unrepaired

10) Film-form protective coatings may be appropriate for use on: *

a) concrete with exposed aggregate

b) concrete that was coated historically

c) concrete with a form-bond finish

d) all of the above