Particle Size Analysis ASTM D422
13 Questions
| Attempts: 169
Particle Size Analysis ASTM D422
Questions and Answers
- 1.The sedimentation cylinder shall be what capacity?
- A.
1000 ml
- B.
500 ml
- C.
100 ml
- 2.The thermometer used for ASTM D422 shall be readable to what?
- A.
0.1 c
- B.
0.5 c
- C.
1 c
- 3.The dispersing agent is made up of what?
- A.
Sodium hydroxide
- B.
Sodium bi-carbonate
- C.
Sodium hexametaphospahte
- 4.The hygroscopic moisture shall be ______ to __________?
- A.
10g, 15g
- B.
20g, 25g
- C.
110g, 120g
- 5.The hygroscopic moisture shall be dryed back to a constant weight at what temperature?
- A.
110 +/- 5 c
- B.
200 +/- 9 f
- C.
110 +/- 5 f
- D.
None of the above
- 6.The coarse sieve shall be perfomed on what fraction of the sample?
- A.
Plus #4
- B.
Plus #10
- C.
Plus #16
- D.
Plus #8
- 7.What would the weight of the sample be for the hydrometer if the material was sandy?
- A.
50 g
- B.
100 g
- C.
110 g
- D.
200 g
- 8.How much dispersing agent is added to the sample for the soaking period?
- A.
125 ml
- B.
150 ml
- C.
100 ml
- D.
200 ml
- 9.How long does the sample soak in the dipersing agent?
- A.
12 hours
- B.
10 hours
- C.
4 hours
- D.
16 hours
- 10.After the sample is put into the 1000 ml beaker it gets turned upside down and back for how long?
- A.
10 seconds
- B.
60 seconds
- C.
110 seconds
- D.
30 seconds
- 11.The hydrometer bubble gets placed in the soil solution how long prior to taking the reading?
- A.
5 to 10 seconds
- B.
10 to 25 seconds
- C.
1 minute
- D.
1 to 2 minutes
- 12.The thermometer is placed in suspension and the temperature recorded after each hydrometer reading.
- A.
True
- B.
False
- 13.What sieve is the sample washed after the final hydrometer reading?
- A.
#40
- B.
#10
- C.
#200
- D.
#100
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