Lesson 4/Practice Exercise
PRACTICE EXERCISE FOR LESSON 4
Instructions
Check your understanding of Lesson 4 by completing the practice exercise. There is only one correct
answer to each question. Try to answer all of the questions without referring to the lesson materials.
When you have completed all of the questions, turn the page and check your answers against the correct
responses. Each correct response is referenced to specific portions of the lesson material so that you can
review any questions you have missed or do not understand, before continuing to the next lesson.
1.
The __________ is an expedient method of moisture testing, but it should be repeated several
times for the most accurate results.
a.
oven method.
b.
shear penetration test.
c.
alcohol burn-off method.
d.
undisturbed sample method.
2.
It can be time-consuming and troublesome to take a chunk sample, but if you have the time it can
contribute important data to the soils analysis. However, you will not be able to take chunk
samples in __________ soils.
a.
clay-like
b.
coarse-grained
c.
cohesive
d.
cohesionless
3.
Using the sand cone method of in-place testing, you must make three calibrations: apparatus,
sand, and surface. If the sand is uniformly graded, why calibrate it before each test? __________
______________________________________________________________________________
4.
What is the primary advantage of the nuclear moisture and density gage over the sand cone
method? ______________________________________________________________________
______________________________________________________________________________
5.
The two liquid displacement methods, oil and water, are similar in procedure. Which one cannot
be used on pervious soils, or in a construction area where asphalt will be used? ______________
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