1. What is the weight of the sample used in the fine aggregate test? (Soundness) ---
100 g
2. What are the sieves used in finding the passing sample in the fine aggregate test? (Soundness) Passing
retained
No. 30-----No. 50 No. 16- ----No. 30 No. 8-------No. 16 No. 4------- No. 8 3/8” ---------No. 4
3. What are the required weights of aggregates in the coarse aggregate test according to the following sieves? (Soundness)
-
3/8’’
-
3/4‘’ ---- 3/8’’---------------------1,000+10
-
1/2'’
-
3/4‘’ ---- 1/2'’---------------------670+10
-
1 ½’’
-
2 ½’’ ----
---- No. 4 ------------------300+5 g
---- 3/8’’---------------------330+5
---- 3/4’’--------------------1,500+50 1 ½’’---------------------5,000+50
4. What are the required weights of aggregates required in the sieve test?
- Sieve No. 4 or smaller ------------------------300 g - 3/8’’------------------------------------------------1 Kg - 1/2'’ -----------------------------------------------2 Kg - 3/4‘’ ------------------------------------------------5 Kg - 1’’----------------------------------------------------10
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- 1 ½’’-------------------------------------------------15 Kg - 2’’-----------------------------------------------------20 Kg - 2 ½’’--------------------------------------------------35 Kg - 3’’------------------------------------------------------60 Kg
5. What is the required number of steel spheres in the Los Angeles Abrasion test according to the following grades?
- Grade A---------------12 - Grade B----------------11 - Grade C-----------------8 - Grade D-----------------6
6. What is the allowed time before changing the water in the curing tank? ----------- 24 Months 7. The process of sampling a concrete sample on site must not exceed? ------------- 15 Minutes 8. What is the number of layers required when taking a concrete sample on site?
----------------3 9. What is the required number of concrete layers in a cylinder ------------------3 10.
What is the allowable temperature for the curing tank?
----------------23+2°C
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11.
What is the humidity in the curing tank?
------------------95% MIN. 12.
What is the required time before removing the concrete sample from the cylinder?
-------------------48 Hours / 24 Hours for ARAMCO 13.
What is the length and the diameter of the rod used in concrete sampling?
----------------------24” and 16+2 mm diam. 14.
What is the length and the diameter of the rod used in the slump
test?
----------------------24” and 16+2 mm diam. 15.
What are the dimensions of the cylinder?
--------100 x 200 mm and 150 mmx300 mm 16.
What is the solution added in the concrete curing tank and what is its percentage?
----------------------Hydrated Lime
3 g/L
17.
What is the maximum allowable temperature for the fresh concrete sample?
-----------------------32°C(ASTM C 94) 5328:1990 Part 3 18.
and
BS
How many times is the slump procedure blows by the rod?
--------------------------25 Times 19.
How many layers are required in a slump test?
------------------------3 20.
What is the allowed time of removing the slump equipment from the concrete?
------------------------------5+2 seconds 21.
To what height must the slump test be lifted?
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-------------------------------- 300 mm/12” 22.
The slump test procedure must not exceed?
-------------------------2 ½ min. 23. What is the number of rotations in the Los Angeles test per minute? -------------------30-33 rpm 24.
The ranges of diameter of spheres used in the Los Angeles test vary between?
--------------46.8 mm 25.
The ranges of weight of spheres in the Los Angeles test vary between?
----------------390-445 g 26.
What is the required time to obtain a correct temperature of the concrete during testing?
--------------------------2 minutes but not more than 5 mins. 27.
In what atmosphere shall the concrete samples be placed in, after removing them from the curing tank?
----------------------------20-30°C room temp. 28.
What is the allowable time for conducting the concrete test (Crushing) after removing the sample from the water tank at 3 days? 7 days? 28 days? 90 days?
--3 days---2 hours, 7 days----6 hours, 28 days---20 hours, 90 days----48 hours 29.
What is the average crushing rate of the cylinder per second?
-----------0.25 MPa/sec. 30.
What is the required weight of sample to be prepared for the Organic Impurities Test?
-----------------------450 g 31.
What are the solutions (minerals) used in the soundness test?
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----------------Sodium sulfate
and
Magnesium Sulfate
32.
What is the specific gravity of the material used in the soundness test? -----------------Sodium sulfate=1.151-1.174
Magnesium
Sulfate=1.295-1.308 33.
What is the required weight of the sample used in the C. Aggregate test and what are the sieves of checking sample? (Clay Lumps)
Sample Larger than No. 16 No. 4 3/8’’ ---- 3/4’’ 3/4'’ ---- 1 ½’’ Larger than 1 ½’’
34.
Sieve Checking
Weight (g)
No. 20 No. 8 No. 4 No. 4 No. 4
25 1,000 2,000 3,000 5,000
The thickness of the capping material should be? (Core Sample)
-----3.5- 50 MPa------6 mm(ave. thickness) thickness at any part) ----->50 MPa------6 mm(ave. thickness) thickness at any part)
8 mm( Max. 5 mm( Max.
35.
What is the required weight of the sample used in the CBR test, and how many blows are requires and how many layers?
-----------29 Kg, 56 Blows, 5 Layers 36.
What is the correction factor for crushing? (Core)
------1.75=0.98 -------1.0=0.87 37.
-----1.5=0.96
------1.25=0.93
Explain the Air Content Test on site.
-------Wet the inside of the bowl and dry it by damp, put fresh concrete into 3 layers w/ 25 strokes each layer, top the side by 10-15 times of each layer. Add the top of the bowl, add 0.5 L of water followed by isopropyl. Invert the meter not more than 5 sec. Continue inversion and shake within 45 s. Roll the meter with 45° within 1 min. Read the gauge. 38. The height of the concrete core should not exceed nor be less than?
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--------------------(1.9-2.1)Diam. 39.
What are the health and safety precautions for the technicians using the troxler equipment on site?---------All technicians must
first complete a gauge safety certification class. Co. RSO should always familiarized all technicians about all aspects of Gauge Operating Safety and Emergency Procedures. Technicians should perform the test quickly, 10 feet from the gauge, the rod should not exposed to the air. 40.
Explain how the nuclear gauge method is conducted on site.
41.
What is the chemical solution that is used in the Air Content test and what are the required blows and the time needed for completing the test?
---------------Isopropyl, 25 blows each layer (2 layers), 2- 6 mins. 42.
What are the sieves that are used to check the passing in the soundness test (Fine Aggregate) and the weights that are required?
Sieve
Weight (g)
Checking Sieve
No. 30 ---- No. 50 No. 16 ---- No. 30 No. 8 ---- No. 16 No. 4 ---- No. 8 3/8’’ ---- No.4
100
No. 50
100
No. 30
100
No. 16
100 100
No. 8 No. 4
43.
What is the required weight of sample in the Clay Lumps test (Fine Aggregate)?
--------------25 g 44.
What is the required weight of sample in the Clay Lump test (Coarse Aggregate) and what are the sieves used?
No. 4-3/8”---------1000 g 6 of 15
3/8”-3/4”---------2000 g No. 4-3/8”---------3000 g >1 1/2”---------5000 g 45.
The diameter of the core should not be less than?
-----------3 times the nominal maximum size of the coarse
aggregate, but should be atleast 2 times the nominal maximum size of the coarse agg. 46.
Soaking the sample used in the soundness test should be between? The sample should be soaked to what depth?
-------16- 18 hours, atleast 1/2" 47.
How many cycles are required in the soundness test?
---------5 48.
What is the required time for testing the Clay Lumps test?
-------------24 hours 49.
Proctor:
Mould Material passing sieve Layers Blows per layer Weight of sample Min. mold
50.
Standard Proctor(ASTM D 698)
Modified Proctor(ASTM D1557)
4”(A &B) and 6”(C) No. 4, 3/8” and 3/4"
4”(A &B) and 6”(C) No. 4, 3/8” and 3/4"
3 25 and 56 layers(6” mould) 16 Kg(Method A& B), 29 Kg(C) 4”
5 25 and 56 layers(6” mould) 16 Kg(Method A& B), 29 Kg(C) 4”
What is the weight of sample required for the L.L test?
---------150-200 g
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51.
The number of blows in the L.L test should be in the range of?
------------25-35 blows 52.
What is the required weight of sample required for the P.L test?
-----------------20 g or more 53.
Place the mixed soil in the storage dish, cover to prevent the loss of M.C and allow to stand at lest for?
---------------------16 hours (page 7 of ASTM D 4318-10) 54.
Explain how the Max. Index test for both wet and dry is conducted.
55.
Explain how the Min. Index test is conducted.
56.
What is the required time for conducting the Max. Index test for both wet and dry?
57.
Summarize Min. and Max index test. Max Size 3’’ 1 ½’’ 3/4'’ 3/8’’
No.4 or less
58.
Mass of Sample(Kg)
Size of Mould(cm3)
34 34 11 11 11
14,200 14,200 2,830 2,830 2,830
Explain the process of Sand Equivalent in DETAILS!
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---A measured vol. of soil or fine agg. and a small quantity of flocculating solution are poured into a graduated plastic cylinder and are agitated to loosen the claylike coating from the sand particles in the test specimen. The specimen is then irrigated using additional flocculating solution forcing the claylike materials into suspension above the sedimentation period, the height of flocculated clay is read and the height of sand in the cylinder is determined. The sand equivalent is the ratio of the height of sand to the height of clay times 100. 59. For sieve analysis, fine aggregates should be washed at? --------No. 200 60.
Liquid limit, plastic index required material should pass from?
--------No. 40 61.
For fine aggregate sieve analysis minimum weight should be?
----------300 g 62.
The temperature of the oven for the dry sample?
-----------------110+°C 63.
For soundness test, total cycles are?
---------------5 64.
The total gradation in the loss abrasion test?
-----------4 65.
Los Angeles test depends on?
--------------Gradation 66.
The gradation of soundness depends on?
----------On sample to be tested 67.
For Maximum Index Density, sample should be soaked for?
68.
According to Aramco, which quality of engineering is used for aggregate and asphalt?
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-----------SAES-Q-006 69.
How many blows does Aramco require for the marshal test for each side?
-------------75 BLOWS 70.
Minimum temperature of asphalt at the time of delivery?
-------135°C 71.
For extraction / gradation of asphalt to paving bitumen’s oils quality, the chemical used is?
----------Trichoethylene/Methylene Chloride 72.
Under what type of conditions asphalt cannot lay down?
------------75 Blows 73.
What is the meaning of JMF?
--------Job Mix Formula 74.
The stability of marshal test after 30 minutes?
---------1,000 Kg 75.
The stability of loss of marshal test after 24 hours?
-------------25% Max. 76.
The temperature of the water bath for asphalt?
-------------60°C 77. Briefly describe the sampling or gradation of soil and splitting. --Soil samples may be collected using variety of methods and equipments depending on the depth of the desired sample, the type of sample required (disturbed vs. undisturbed), and the soil type. Near-surface soils may be easily sampled using apade, trowel, and scoop. Sampling at greater depths may be performed using a hand auger, continuous flight auger, a trier, a split-spoon, r if required, a backhoe. 78. How is the CBR process done?
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79.
What are the minimum concrete cylinders that should be cast for each set to be tested for compressive strength as per Saudi Aramco Standards?
----------4 28 Days)
(
1-3 Days
1- 7 Days
2-
80.
What are the requirements of water to be used for curing concrete specimens as per ASTM specification?
--------23+2°C 81.
At what age concrete cylinders should be tested for Saudi Aramco projects?
----------3, 7 and 28 Days 82.
The molding of strength test specimens after fabrication of the compressive sample shall begin within?
-------15 mins. 83.
How frequent shall concrete capping material be tested?
---------Everyday 84.
The number of blows, layer, and size of proctor molds depends
on?
-----Gradation 85.
How many hours should the CBR samples be soaked?
-------96 Hours 86.
At what sieve size do you wash soil samples in order to determine the % loss of the fine material?
--------------No. 200 87.
What type of solution shall be used to perform soundness test as per Saudi Aramco requirements? 11 of 15
---------------Magnesium Sulfate 88.
How many minutes do you vibrate the table for relative index test soil?
a)
5-6 & 8-12 minutes
b) 10-12 & 16-24 minutes c) 15-20 & 30-45
minutes
89.
For sand equivalent value of soil the soil shall be passed through sieve #?
-------No. 4 (ASTM D 2419) 90.
The temperature of stack solution during sand equivalent test shall be maintained at?
---------------22°C 91.
Stack solution shall be placed from testing place at a height of:
a) 40 ± 1
b) 36 ± 2
c) 20 ± 1
d) 15 ± 1
92.
Siphon stack solution prior you put soil sample to each cylinder to about:
a) 8’’
b) 16’’
c) 4’’ (page 6)
d) 6’’
93.
After putting soil sample in the cylinder for sand equivalent test, you should allow the sample and cylinder to stand undisturbed for approximately?
a)
10 minutes (page 6)
b) 15 minutes
c) 20 minutes
d) 25 minutes
94.
During conduction sand equivalent of soil using hand method, you should shake each cylinder for?
a) 90 cycles in 5 minutes seconds(page7)
b) 90 cycles in 30 minutes
c) 90 cycles in 30
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95.
After shaking of sand equivalent cylinder you shall irrigate the stack solution to the cylinder by stabbing and twisting until the cylinder is filled to?
a) 20’’
c) 25’’(page 7)
b) 15’’
d) 30’’
96.
After shaking and irrigating, you shall let the cylinder stand undistributed for sedimentation prior taking the reading for about
a) 80 minutes minutes
b) 60 minutes
d) 20
c) 40 minutes
97.
What Saudi Aramco reference standard that describes the minimum mandatory requirements governing the design and construction of asphalt concrete paving except airfield pavement?
Engineering Standard
SAES-Q-
006 98.
There are
4 grading in Los Angeles test for aggregate samples?
99.
The weight of aggregate that we use in the Los Angeles machine to run Los Angeles Abrasion test shall be around?
------------5,000 g 100.
The bowel shall be filled using scope in
2 layers and each layer
25 times. After each layer is rodded, tab the sides of the measure (bowels) 10 to 15 times with shall be strike with a tamping rod for
mallet to close any voids or trapped bubbles.
101.
What type of alcohol is used to run ASTM C173?
a) Methyl alcohol b) Isopropyl d) Propyl alcohol
102.
alcohol
c) ethyl alcohol
For how long should the air meter be inverted and agitated?
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a) 90 seconds b) 60 seconds seconds
c) 45 seconds
d) 15
103. Explain how to do the proctor test. -There are two types: Standard and modified proctor. For standard: There are 3 methods: Method A, B, C..These methods depend on the gradation. Method A (4”mould)(3 layers)(25 blows) if 20% or less by mass of the mat. Retained on the No. 4 sieve. Method B(4”mould) (3 layers) (25 blows), 20% retained on 3/8” sieve and Method C(6”mould)(5 layers) (56 blows) for 20% by mass of the mat. Retained on No. 3/8” sieve and less than 30% by mass of the mat. is retained on the 3/4” sieve. For modified: There are 3 method also: Method A, B, C..These methods depend on the gradation. Method A (4”mould)(5 layers)(25 blows) if 25% or less by mass of the mat. Retained on the No. 4 sieve. Method B(4”mould) (5 layers) (25 blows), 25% retained on 3/8” sieve and Method C(6”mould)(5 layers) (56 blows) for 30% or less by mass of the mat. Retained on No. 3/4”. 104.
What is the formula for Relative Density?
Relative Density=Maximum Index(Dry Density-Minimum Index)X100 Dry Density ((Maximum IndexMinimum Index)
105.
What is the formula for Soil Compaction %
-----------106.
-Dry Density x 100 Maximum Dry Density
What is the specification of capping material?
---------ASTM A 617-09a 107.
What is the temp (oC) specification for core capping material?
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---------129°C -143°C 108.
What is the maximum time for mixture from pouring to finish in concrete?
-------------1 ½ Hours (ASTM C 94)(Page 7) 109.
The molding of strength test specimens shall begin within mins. after composite sample?
110.
15
The temperature of sand equivalent shall be maintained at?
------------------22°C 111.
How many grams you need for Marshall Cakes?
---------------1,200 g 112.
What will the temperature of the over for asphalt be?
-----------------at
least 4°C or over
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