CE 200 MATERIALS LAB FINAL QUIZ 2 -
PCC AND WOOD EXAM 2025
QUESTIONS AND ANSWERS
When conducting the slump test in the laboratory — in accordance to ASTM C 143, "Standard
Test Method for Slump of Hydraulic-Cement Concrete" — it was required to rod (25 strokes for
every one of the three layers) the PCC in the frustum of the cone (the slump test cone or mold)
prior to measuring the slump, primarily, so as to: - ANS Compact the freshly mixed portland
cement concrete (PCC) in the frustum of the cone mold
Why do you pound the PCC 25 times (for every 1 of 3 layers) in the frustum with a rod during
the slump test? - ANS To compact the PCC into the cone mold
frustum of a cone - ANS formed by cutting the top off of a cone with a cut parallel to the
base.
The mold for making the slump test is in the shape of : - ANS Frustum of a Cone
Slump Test - ANS A test for mixed concrete to determine consistency and workability.
You wet the frustum of the cone during Slump Test so as to: - ANS Provide a lubricating
effect so that the PCC doesn't stick to the mold when pulled upward
When testing the timber specimen in compression parallel to the grain, a significant deviation
from the procedures prescribed in ASTM D 143, "Standard Test Methods for Small Clear
Specimens of Timber," was: - ANS Not using a displacement-controlled loading scheme (e.g.,
inch/minute)
1 Copyright ©2025 FYNDLAY ALL RIGHTS RESERVED.
, The clear-grade Douglas fir timber specimen tested in the CE 200L laboratory in shear parallel
to the grain would have been stronger if : - ANS Instead, it had been tested perpendicular to
the grain
Water Content = - ANS Water mass Wet / Water mass Dry
Lime increases - ANS Workability, Bondage Strength of Mortar and keeps water inside the
mix
Timber has high - ANS Strength / Weight Ratio
Compressive Strength of Timber is MAX _______ to the fibers - ANS Parallel
Compressive Strength of Timber is MIN _______ to the fibers - ANS Perpendicular
Shear Strength of Timber is MAX _______ to the fibers - ANS Perpendicular
Shear Strength of Timber is MIN _______ to the fibers - ANS Parallel
Tensile Strength of Timber is MAX _______ to the fibers - ANS Parallel
Tensile Strength of Timber is MIN _______ to the fibers - ANS Perpendicular
Shear(min) = - ANS F(max) / Area
Simply Supported Beam - ANS An idealized structural beam with a pinned connection
at one end, and a sliding connection at the other end
2 Copyright ©2025 FYNDLAY ALL RIGHTS RESERVED.
PCC AND WOOD EXAM 2025
QUESTIONS AND ANSWERS
When conducting the slump test in the laboratory — in accordance to ASTM C 143, "Standard
Test Method for Slump of Hydraulic-Cement Concrete" — it was required to rod (25 strokes for
every one of the three layers) the PCC in the frustum of the cone (the slump test cone or mold)
prior to measuring the slump, primarily, so as to: - ANS Compact the freshly mixed portland
cement concrete (PCC) in the frustum of the cone mold
Why do you pound the PCC 25 times (for every 1 of 3 layers) in the frustum with a rod during
the slump test? - ANS To compact the PCC into the cone mold
frustum of a cone - ANS formed by cutting the top off of a cone with a cut parallel to the
base.
The mold for making the slump test is in the shape of : - ANS Frustum of a Cone
Slump Test - ANS A test for mixed concrete to determine consistency and workability.
You wet the frustum of the cone during Slump Test so as to: - ANS Provide a lubricating
effect so that the PCC doesn't stick to the mold when pulled upward
When testing the timber specimen in compression parallel to the grain, a significant deviation
from the procedures prescribed in ASTM D 143, "Standard Test Methods for Small Clear
Specimens of Timber," was: - ANS Not using a displacement-controlled loading scheme (e.g.,
inch/minute)
1 Copyright ©2025 FYNDLAY ALL RIGHTS RESERVED.
, The clear-grade Douglas fir timber specimen tested in the CE 200L laboratory in shear parallel
to the grain would have been stronger if : - ANS Instead, it had been tested perpendicular to
the grain
Water Content = - ANS Water mass Wet / Water mass Dry
Lime increases - ANS Workability, Bondage Strength of Mortar and keeps water inside the
mix
Timber has high - ANS Strength / Weight Ratio
Compressive Strength of Timber is MAX _______ to the fibers - ANS Parallel
Compressive Strength of Timber is MIN _______ to the fibers - ANS Perpendicular
Shear Strength of Timber is MAX _______ to the fibers - ANS Perpendicular
Shear Strength of Timber is MIN _______ to the fibers - ANS Parallel
Tensile Strength of Timber is MAX _______ to the fibers - ANS Parallel
Tensile Strength of Timber is MIN _______ to the fibers - ANS Perpendicular
Shear(min) = - ANS F(max) / Area
Simply Supported Beam - ANS An idealized structural beam with a pinned connection
at one end, and a sliding connection at the other end
2 Copyright ©2025 FYNDLAY ALL RIGHTS RESERVED.
