CM 1112 LSU EXAM 2 (STEPHANIE HEUMANN) - 183
QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS.
T/F: Dry-press process uses IDRW porosity clays. Answer - True
T/F: Column forms always require form ties. Answer - False
T/F: Efflorescence may suddenly appear on masonry wall after it is built. This is
an indication of faulty construction. Answer - False
T/F: Precast elements are sometimes joined together using gravity. Answer -
True
T/F: Bricks shrink considerably during drying and firing. Answer - True
T/F: Concrete strength is specified by a compressive strength at 28 days.
Answer - True
T/F: Precast elements may be reinforced by pre-stressing or conventional
reinforcing, but never a combination of the two. Answer - False
T/F: Insulating Concrete Forms become a permanent part of the structure.
Answer - True
,T/F: Double T precast slabs are hard to handle due to their tipping issues.
Answer - False
T/F: A composite masonry wall is named because it features an outer wythe of
stone or brick and an interior wythe of CMU's. Answer - True
T/F: The minimum recommended cavity depth is 2 feet. Answer - False
T/F: Pre-stressing tensions the steel and places the concrete in compression,
giving a more efficient structural member. Answer - True
T/F: Compared to site-cast concrete, pre-cast concrete erection is faster.
Answer - True
T/F: Mortar seals joints between the masonry units. Answer - True
T/F: Stone masonry can be set/stacked without mortar. Answer - True
T/F: Post tensioning reduces the necessary depth of a structure and helps
reduce cracking. Answer - True
T/F: Every construction site ______________ excavation. Answer - True
T/F: Fully precast high-___________________ in modern construction. Answer
- False
T/F: Hollow core slabs may be produced by direct extrusion. Answer - True
, Bunches of bricks are loaded, fired, cooled and removed. Answer - Periodic
Kiln
Relatively moist clay is pressed into individual molds Answer - Soft Mud
Process
Sedimentary rock Answer - Quartz Based Stone
Avoid grinding and allows for expansion and contraction. Answer - Bearing
Pads
Organization that establishes the nationally accepted specification format for
organizing information about materials and methods of construction. Answer -
CSI
Type of precast beam used on longer spans such as bridges and highways.
Answer - Steel Reinforcing Bars
Transverse dividers used in pre-cast casting beds to divide the pre-cast
elements into separate specific lengths. Answer -
Openings formed and cast in concrete structures. Answer - Block-Outs
A structural column component that provides direct support of a beam or slab
element. Answer - Haunch
Pads that are inserted at points of precast concrete-to-concrete contact to
avoid grinding at these points of high stress. Answer -
QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS.
T/F: Dry-press process uses IDRW porosity clays. Answer - True
T/F: Column forms always require form ties. Answer - False
T/F: Efflorescence may suddenly appear on masonry wall after it is built. This is
an indication of faulty construction. Answer - False
T/F: Precast elements are sometimes joined together using gravity. Answer -
True
T/F: Bricks shrink considerably during drying and firing. Answer - True
T/F: Concrete strength is specified by a compressive strength at 28 days.
Answer - True
T/F: Precast elements may be reinforced by pre-stressing or conventional
reinforcing, but never a combination of the two. Answer - False
T/F: Insulating Concrete Forms become a permanent part of the structure.
Answer - True
,T/F: Double T precast slabs are hard to handle due to their tipping issues.
Answer - False
T/F: A composite masonry wall is named because it features an outer wythe of
stone or brick and an interior wythe of CMU's. Answer - True
T/F: The minimum recommended cavity depth is 2 feet. Answer - False
T/F: Pre-stressing tensions the steel and places the concrete in compression,
giving a more efficient structural member. Answer - True
T/F: Compared to site-cast concrete, pre-cast concrete erection is faster.
Answer - True
T/F: Mortar seals joints between the masonry units. Answer - True
T/F: Stone masonry can be set/stacked without mortar. Answer - True
T/F: Post tensioning reduces the necessary depth of a structure and helps
reduce cracking. Answer - True
T/F: Every construction site ______________ excavation. Answer - True
T/F: Fully precast high-___________________ in modern construction. Answer
- False
T/F: Hollow core slabs may be produced by direct extrusion. Answer - True
, Bunches of bricks are loaded, fired, cooled and removed. Answer - Periodic
Kiln
Relatively moist clay is pressed into individual molds Answer - Soft Mud
Process
Sedimentary rock Answer - Quartz Based Stone
Avoid grinding and allows for expansion and contraction. Answer - Bearing
Pads
Organization that establishes the nationally accepted specification format for
organizing information about materials and methods of construction. Answer -
CSI
Type of precast beam used on longer spans such as bridges and highways.
Answer - Steel Reinforcing Bars
Transverse dividers used in pre-cast casting beds to divide the pre-cast
elements into separate specific lengths. Answer -
Openings formed and cast in concrete structures. Answer - Block-Outs
A structural column component that provides direct support of a beam or slab
element. Answer - Haunch
Pads that are inserted at points of precast concrete-to-concrete contact to
avoid grinding at these points of high stress. Answer -
