CT 217 - Sand Equivalent

Question 1

The level of sand equivalent solution should be at______ above the work surface period.

Answer 1

36-46 in.

Question 2

The required frequency for mechanical sand equivalent shaker is ______.

Answer 2

175 ± 2 cycles per minute

Question 3

what does the sand equivalent test measure?

Answer 3

The relative proportions of dust or clay like fines in soil or aggregate.

Question 4

The required agitation frequency for a manual sand equivalent shaker is ________.

Answer 4

100 cycles in 45 ± 5 seconds.

Question 5

A working calcium chloride solution should be prepared with __________ of stock solution mixed with distilled or deionized water to obtain 1 gallon of solution.

Answer 5

85 ± 5 milliliters

Question 6

Working calcium chloride solution should be discarded if it is older than blank days.

Answer 6

14 days.

Question 7

The working solution should be maintained at a temperature of _________.

Answer 7

72 plus or minus 5°F

Question 8

How much material passing the No. 4 sieve should be prepared?

Answer 8

1000 grams to 1500 grams

Question 9

if the test specimen contains reclaimed asphalt concrete what is the maximum drying temperature?

Answer 9

100°F

Question 10

what method should be used to obtain the quantity of material required to fill four tins?

Answer 10

Fill 4 tins.

Question 12

The level of the sand equivalent solution should be maintained at ___________ above the work surface.

Answer 12

36-46 inches.

Question 13

The required frequency for mechanical sand equivalent shaker is _______.

Answer 13

175+- 2 cyles per minute.

Question 14

3 what does the sand equivalent test measure?

Answer 14

The relative proportions of dust or clay like fines in soil or aggregate.

Question 15

4 the required agitation frequency for manual sand equivalent shaker is_____.

Answer 15

100 cycles in 45 +- 5 seconds.

Question 16

5 working calcium chloride solution should be prepared with _______ milliliters of stock solution mixed with distilled or deionized water to obtain 1 gallon of solution.

Answer 16

85 +- 5 milliliters

Question 17

6 working calcium chloride solution should be discarded if it is older than ___________ days.

Answer 17

14 days.

Question 18

7 the working solution should be maintained at a temperature of ___________.

Answer 18

72 plus or minus 5�F

Question 19

8 how much material passing the number 4 see if it should be prepared?

Answer 19

1000 grams to 1500 grams.

Question 20

9 if the test specimen contains reclaimed asphalt concrete what is the maximum drying temperature?

Answer 20

100+-F

Question 21

10 what method should be used to obtain the quantity of material required to fill four tins?

Answer 21

Fell 4 tins.

Question 22

11 the contents of each tin should be consolidated by tapping the bottom of the tin on a hard surface.

Answer 22

True

Question 23

After determining the amount of material required to fill 4 tins the sample should be split to obtain that quantity.

Answer 23

True

Question 24

13 it is never permissible to test an air dried specimen.

Answer 24

False

Question 25

14 before introducing the sample the plastic cylinder should be filled with working solution to the ___________ mark.

Answer 25

4 inch +-.1 inches

Question 26

15 which statement explains the correct method for releasing air bubbles and wetting the sample after placing the test specimen in the plastic cylinder?

Answer 26

Tap the base of the cylinder against a firm object while pouring the sample into the cylinder and tap the base of the cylinder firmly against the heel of your hand after the sample has been poured into the cylinder.

Question 27

16 the specified agitation. For the mechanical and manual shaker is 45 seconds �1 second.

Answer 27

True

Question 28

If results are disputed that were obtained with the manual shaker the test should be repeated with a mechanical shaker.

Answer 28

True

Question 29

When beginning to lower the irrigation tube into the cylinder loose material should be washed from the sides of the cylinder.

Answer 29

True

Question 30

19 which statement explains the correct method of irrigating the sample?

Answer 30

The irrigator tube should be pushed to the bottom of the sample with a twisting action and the irrigator tube should be withdrawn and reinserted into the sample to promote flushing of the clay size material from the sand and the cylinder should be rotated or during irrigation to inspect the sample for pockets of fines and the irrigator tube should not be withdrawn until the solution reaches the 15 inch mark.

Question 31

20 following irrigation the cylinder should stand undisturbed for ___________.

Answer 31

20 minutes +-15 seconds

Question 32

21 the clay reading is the level at the bottom of the sediment column.

Answer 32

False

Question 33

Clay readings should be recorded too ___________.

Answer 33

0.1 inches

Question 34

23 always record the clay and sand readings to the lower graduation if the reading falls between graduation marks.

Answer 34

False

Question 35

24 What should be done if a distinct line of demarcation for the clay reading does not form within the specified 20 minute period?

Answer 35

Wait until a clear line forms then immediately read and record the time and height.

Question 36

25 after lowering the weighted foot onto the sand provide a gentle downward force to seat the foot.

Answer 36

False.

Question 37

26 always read the bottom edge of the sand level indicator.

Answer 37

False

Question 38

27 why must you subtract 10 from the sand level indicator reading?

Answer 38

The second indicator is offset 10 inches above the bottom of the weighted foot.

Question 39

28 with a clay reading of 12.2 and a sand reading of .9 the reported SE should be ___________.

Answer 39

8

Question 40

29 what sieve size should be used prior to preparing test samples?

Answer 40

No.4 sieve.

Question 41

How much material passing the No. 4 do you need from your bulk sample?

Answer 41

1000 to 1500 grams

Question 42

What is the required amount of material for each test specimen?

Answer 42

The amount of material that fills a measuring tin to level full.

Question 43

How many test specimens should be prepared?

Answer 43

4

Question 44

How should the exact amount required to provide 4 test specimens be determined?

Answer 44

By dipping 4 measuring tins full of the material and determining the combined weight.

Question 45

How should a measuring tin be filled when determining the combined weight?

Answer 45

Dip the tin full of material then tap at the bottom edge of the tin with a hard object or on the hard surface to cause consolidation of the material. Fill the tin to slightly rounded above the brim then strike off with a spatula or straight edge.

Question 46

What is the next step after determining the required amount of material for four test specimens?

Answer 46

Return the material to the sample then split or quarter the material necessary to provide 4 test specimens.

Question 47

How should each individual test specimen be prepared?

Answer 47

Split or quarter the pre measured material to obtain a test specimen. Two successive splits will provide specimens of the proper size.

Question 48

Can you make adjustments to this specimen size by adding or removing material after the final split?

Answer 48

No

Question 49

How long must the cylinder containing the wetted material stand before agitating?

Answer 49

10 minutes +-1 minute