3-49.
3-50.
3-51.
3-52.
3-53.
3-54.
Which of the following field tests
can be used to determine the
cohesiveness of a soil?
1.
Ribbon
2.
Roll
3.
Breaking
4.
Each of the above
The breaking, ribbon, and
wet-shaking tests are performed on
material passing the
1. No.
40 sieve
2. No.
60 sieve
3. No. 100 sieve
4. No. 200 sieve
You have performed the dry-strength
test. The sample cannot be
powdered but will break with
difficulty. What is the
classification of the soil?
1. CL
2. CH
3. ML
4. MH
What tests complement each other in
giving a clearer picture of the
plasticity of the soil?
1.
Wet shaking and roll
2.
Ribbon and breaking
3.
Roll and ribbon
4.
Wet shaking and breaking
What is the size of the sample used
for the wet-shaking test?
1.
A roll of soil 1/2 inch in
diameter and 3 inches long
2.
A pat of soil 1/2 inch thick
and 1 1/2 inches in diameter
3.
A ball of soil 3/4 inch in
diameter
4.
A ball of soil 1 3/4 inches in
diameter
A mall amount of clay present in
your sample will affect your
shaking test in what manner?
1.
Causes no reaction
2.
Causes a sudden reaction
3.
Retards the reaction
4.
Assists in identifying the
sands and silts
3-55.
3-56.
3-57.
3-58.
3-59.
The odor test is effective in
identifying what type of soils?
1.
Organic
2.
Cohesive
3.
Clayey
4.
Oily
What field test can readily
identify soil as containing sand,
silts, or clay?
1.
Acid
2.
Feel
3.
Bite
4.
Shine
To prevent a false test result when
performing the acid test, you
should prepare your sample in what
manner?
1.
By heating
2.
By wet-sieve washing
3.
By adding moisture
4.
By adding lime
A positive result of the shine test
indicates the
1.
lack of clay in the soil
2.
presence of highly plastic clay
3.
presence of peat
4.
lack of plasticity of the
sample
To determine the texture of the
soil, it is recommended you rub the
soil
1.
on the back of your hand and
allow the sample to dry
2.
on a tender skin area, such as
the wrist
3.
between dry fingers
4.
between slightly oiled fingers
18
