CBT Notes all Q - Copy PDF

Question Answer 1- Residential group minimum size of bed room size? 0.90m *2.1 2- minimum compressive strength of the 3500 cementitious grout shall be a of at 7 days of age (ASTM C 1107)? 3- Cantilever Slab thickness?...

Question Answer 1- Residential group minimum size of bed room size? 0.90m *2.1 2- minimum compressive strength of the 3500 cementitious grout shall be a of at 7 days of age (ASTM C 1107)? 3- Cantilever Slab thickness? L/10 4- Ceramic title joint smoothness tolerance? 3mm 5- Minimum spacing of the rebar in the slab bridge? Less than 32mm 6- Mixing of water to cement/ content as per ASTM? ASTM-C109 7-Adding chemical to concrete, what happens? Reducing workability & slump 8- Using proper vibrating in concrete as Increasing Slump 9- Aluminum parts allowed inside concrete False 10- End of vibrator as coating bar used in concrete Rubber & non-metallic use? 11- Miximum dropping height of concrete? 1m 12- maximum time of reach at concrete site? 90 minutes 13- Height of slump cone? 30cm 14- Concrete cylinders size? 15x30 15-HD…Galvanized steel inside concrete at site? True 16-Below foundation applying? Bapour burrier 0.15mm thick 50mm thick lean concrete 17-Using cement 370 Kg-350 to attain compressive 4000psi 18-Compressive strength non-shrink grout as 5000psi minimum 19- Exposed below ground under water foundation Type1+Silic which cement used? 20- Post tensioning of steel bars? After concreting 21-Minimum thickness of epoxy grout joints? 25mm 22- Miximum distance of epoxy grout joints? 1.40mm 23- MC1 curing time? None 24- Maximum thickness of anchor bolts using fixing 20mm ladders? 25- Base plate thickness minimum? 12mm 26- Minimum distance from anchor to edge of 100mm corner? 27- Maximum trench width? Pipe+400mm 28- Shoring required for excavation depth excessed? More than 1.2m 29-Minimum compaction required for general fill 90% using machinery? 30- For cohesionless soil relative density density MDD+OMC determination? 31- Aggregate washing water (TDS)? 3500 32- Clean sand passing (200 sieve) % 10 or less 33- Using cement 3500Kg to 370Kg to attain how 4000 PSI much compressive 34- Post tension of steel bars? A) after concrete set B) while concrete set 35- concrete masonry shall be cured for minimum of 7 days days before surface preparations for grouting? 36- The minimum Q compressive strength(ASTM 12000 C579, Method B modified) at 7 days PIP STS033601 , Sec.5.1.1.1)? 37- Grout shall be applied only when surrounding 32 temperatures? 38- Fill material amount of material passing the No. A: 0 -20 200 sieve? B: 0-35 39- Sampling fresh concrete which ASTM? ASTM 1702 40- When immersion -type vibrators are used to (ASTM A 765/ A775m-07b) consolidation concrete around epoxy coated steel rubber or nonmetallic reinforcement bars, the vibrators are should be equipped with vibrators heads? 41-Galvanized welded wire fabric shall conform? ASTM A767 42- Minimum trench width? Pipe size+400mm 43- General fill loose thickness? 300mm 44- Marshall density as per ASTM d-1559 96% 45- The mortar shall be type mortar cement fine and ASTM C-270 S or M shall conform to the conform to the? 46- All gusset and stiffener plates minimum 3/8 inch thickness? 47- conventional asphalt mix temperature when it 139C and 163C leaves the batch plant? 48-The prime coat shall be applied uniformly to the 0.65L/m2 and 1.75L/m2 surface of the base using pressure distributor at rate? 49- gravel, sand and/ marl materials – maximum size? 75mm 50-Select fill material beneath and/or adjacent to 95% M.P.D and 85% R.D foundations with static loads over 320 Kpa and foundation for vibrating or heavy machinery 51- if concrete delivered in trucks having operable accepted revolution counters? 52- concrete used in hollow block which cement Type1,2,4,5 53- compressive strength of mortar? 1800psi 54- YOUNG MODLESS DIFNATION 55- IF SHEER STRESS IS ZERO BENDING MOVEMENT 56- IF WE USE VIBRATOR IN CONCRETE SLUMP? HIGHI , LOW , MID 57- The minimum vertical reinforcement? 12mm diameter bars at 1.2 meters spacing 58- if not specified by the equipment manufacturerer , transsiesient forces consisting lateral and longitudinal forces? 59- Maxing of water for compaction if not avail able 10000 TDS within 60- mrashall density of asphalt? 96% 61- Aphalt binder ratio? 4-7% 62-If sub-grade material has been less than 5% CBR 200mm &25 the base coarse material how much CBR & thickness? 63- If excavation is more than ……. Then we need 6m excavation plan 64- one -way slab is supported by the beams on the two opposite sides 65- two-way slabs are supported on all the four sides span should be less than ½ 66-Barittle material? A material is brittle if, when subjected to stress, it breaks with little elastic deformation and without significant plastic deformation brittle materials absorb relatively little energy prior to fracture, even those of high strength. Breaking is often accompanied by a snapping sound. 67- 50mm concrete in thickness resistance against 2 hour fireproofing (time)? 68-why we use vibrator We use vibrator to increase the work ability & consolidation of concrete Or The vibration cause the mixture to liquefy, reducing the internal friction of the mix components of cement, aggregate, and water. This allows the mix to move around more easily in whatever from you are placing the concrete …. The vibarations help to bring those air bubbles to the surface where they escape. 69- why concrete cracks appear? 1- Excess water in the mix 2- concrete drying too fast 3- Improper strength concrete pourd on the Job 4- Lack of control joints (in concrete slab) 5- foundation poured in the winter 70- Natural pozzolan use how much % in cement? 25% for normal concrete an up to 65% for special strength. 71- Bend of bar (bar hook) having dia 16mm or less Up to 16mm for ties & strips = also bend angle 4db 72- Mixing of water in cement according to which ACI-318, ASTM-C-1602 and 09- standard SAMSS-097 ready mix concrete. 73-Minimum Hight of structure up to ground level? 3m 74- Aggregate washing water (TDS)? 3500ppm 75- Minimum size of aggregate in concrete? 10mm 76- Maximum size of aggregate in concrete? 20mm 77- clean sand passing (200 sieve) %? Less than 10% 78- Sulphur extended ashfall temperature at the time 130 C to 140 C when it leaves to batch plant? 79-temperture of concrete? 35 C 80- Grout temperature? 23+-3 as per (ASTM-C-1107) 81-Cementitous Grout compressive strength? 5000psi 82- Minimum thickness of vehicles paving concrete 150mm slab? 83- Structural concrete compressive strength? A: 7days strength =(35MPA) 5000psi B: 7 days strength = (28MPA) 4000psi 84-Size of marl? Miximum size of marl is 75mm 85- precast concrete compressive strength? 5000psi 86- TDS in water for curing of grout 500ppm 87- Maximum TDS in water for curing concrete? 1000ppm 88- Maximum distance epoxy grout joint? 1.4m 89- Min curing for concrete? 7 days 90- minimum thickness of anchor bolts using fixing 20mm and 18mm ladder? 91- Base plates minimum thickness 10mm 92- Equipment made of aluminum allows shall be use No in concrete? 93- Vibrator shall be used for movement of concrete No after placement? 93- Re- tempering of concrete after placement is No allowed? 93- Minimum trench width? Pipe size +300mm 94-Slump cone height? 300mm 95- Concrete cylinder size? 15cm dia, 30cm height 96- Using cement 350Kg to 370Kg to attain how much 4000psi compressive strength? 97- Maximum drop Hight of concrete? 1m 98- shoring required for excavation depth exceeding? 1.2m 99- Maximum compaction required for cohesion less 85% material when pressure above to 320Kpa? 100- when post tension force is used? After concrete finished 101- calcareous material effect in aggregate? Make voids and lower cement strength 102- If WC less? Increase the strength 103- Sampling fresh concrete? ASTM-C-172 104- At W/C 0.4 the compressive strength of grout 5000psi after 28 days? 105- What is the minimum size & distance of rebar 12mm 1.2meters use in building? 106-Which cement used in hollow block? 1,2,4,5 107- Young modulus definition? Is a mechanical property that measures the stiffness of a solid material. It defines the relationship between stress and strain in a material in the linear elasticity regime of uniaxial deformation 108- Floor title straight edge tolerance? 109- Spalling in concrete? 110- Chemical effect on concrete? 111- 6mm hock dia 112- Cold joint definition? 113- Cracks in concrete definition? 114- Maximum concrete contact in structural concrete? 115-Which type vibrator used in concrete? 116- Minimum size of anchor bolt? 117- End of concrete edge from anchor bolt? 118- Base and sub base material compaction? 119- For relative density which values required? 120- Aluminum parts allow in concrete or no 121- Base material compaction? 122- Size of slump cone? 123- Fill material thickness? 124- General fill material thickness in loose material? 125- Which SEAS we use for Saudi Aramco ? 126- TDS for compaction water? 127- Rows of bolt in 8-inch beam 128- CMU curing time? 129- Minimum spacing in rebar? 130- Stiffener plate thickness 131- What are the minimum concrete cylinders 4 should be cast for each set to be tested for compression strength as per Saudi Aramco co standard? 132- what is the maximum allowable fresh concrete 35 C temperature until used as per Saudi Aramco standard? 133- what are the requirement of water to be used 1000ppm for curing concrete specimens as per ASTM specification? (SWEET WATER , MAX TDS) ? 134- In what temperature range should concrete 23+-2 specimen be cured as per ASTM Specification? 135- At what age concrete cylinders should be tested (3,7,28) for Saudi Aramco co projects? 136- How frequent shall concrete capping material is (Every lot should be tested) tested? 137- How many minutes does it take to complete 2-1/2Minute temperature measurements after obtaining sample? 138- The molding of strength test specimens shall (15min ) after fabricating the begin within? composite sample? 139- The slump test is failed in (3) layers and each layer shall be rod for (25 strokes). 140- The diameter of standard tamping rod casting six 24 (600mm) inches diameter cylinder is 5/8 (16mm) and it is length approximately is 141-How many seconds does ASTM specifies to (5+-2) remove the slump cone? 142-The number of below, layers, and size of proctor (gradation) molds depends on of soil? 143- How many layers do you apply during standard A: (Mold dia 4”3 layers 25 proctor compaction? Belows/layer B: Mold dia 6”3 layers, 56 Belows / layer 144- How many layers does the modified proctor (5Layers (56 Blows) consist of? 145- How many points ( as minimum ) does modified Minimum ( 4 Points), preferred 5 proctor test should be consisted of? points 146- How many hours Should CBR samples be soaked (96 hours) 147-What sieve size do you need to obtain a sample (40) for liquid/ plastic limits? 148- At what temperature do you dry soil sample for (110+50 )C gradation only? 149- Briefly explain how to prepare a soil sample for A: Quartering the sample. gradation? B: keep the sample in oven for day at 110+5 degree centigrade. C: Sieve the material on specified meshes and note the retained on each sieve. D: Calculate the percent passing each sieve. 150- At what sieve size do you wash soil sample in (200) sieve order to determine the % of fine materials? 151-What are safety equipment do you need when (TLD, 3meters away from Nuclear) perform field density test using nuclear gauges? 152- Briefly describe how to conduct field density test A: Take standard count for density using a nuclear gauge? and moisture to confirms the counts as per calibration certificate. B: Select the location at least 10 meters away from structure and make hole by rod minimum 2 or more deeper the testing depth. C- Keep the nuclear at hole in position so that the soil not disturbed by rod D: check DD, moisture content and percentage compaction 153- Briefly describe how to run CBR test as per ASTM Prepare 3 specimen molds for procedures (compaction and penetration)? compaction as follow: 10- Blows 25- Blows 56- Blows 5 Layers 154-After compaction soak the specimen for 96 hours 1,2 penetration , drain for 15 minute after soaking and crush taking reading? 155- What is the minimum weight of fine aggregate 100g for sieve analysis as per ASTM C136? 156- After soundness cycles, what sieve sizes do you A. 4 use to determine fine aggregate loss? b.1/4 c.5/16 (In the same sieve on which it was retained before the test) 157- After soundness cycles, what sieve sizes do you A. 4 use to determine coarse aggregate loss? b.1/4 c.5/16 (depends on aggregate fraction size) 158- what is the minimum weight of coarse aggregate Size Kg for sieve analysis as per ASTM C136? 20 15 10 5 2 1 2 11/2 1 159- How many cycles are there for soundness test? 5 cycles 160- what is the ASTM specified reading requirement (MgSo4 < 1.295 1.308) of specific gravity of soundness solution? 161-what is the type of solution shall be used to (MgSo4, sodium Sulphate) perform soundness test as per Saudi Aramco requirements? 162-Clay lump samples shall be soaked for: A 12+/- hours B 300 g C (24+/- 4hours) D 48+/- 4 hours 163- To prepare Clay Lump fraction as per ASTM C142 A. 500g the of aggregate should be B. 300g C. 10.000 D. (Depends on the aggregate) 164- Prior running liquid limit you should place the least (16) hours prepare material in its mixing dish and cover to prevent moisture loss for at 165- Explain in brief how you perform maximum 1. Take minimum density loose. index density and unit weight of soil using vibrating 2. Keep mold on vibrating table table (using wet method)? surcharge weight on oi 3. Remove water from top of mold with sponge 4. sample should be in SSD condition 166- Fill material retained on 75 mm sieve shall be? 0% 167- Amount of selected fill material passing……….. 50mm sieve shall be 100%? 168- No marl fill material shall be retained 75mm on…………sieve? 169- As a minimum, Select Fill shall be used 0.3m within…………..of the bottom elevation of foundations, spread footing, or slabs- on-grade when fill is required to achieve final grade? 170- Any excavation or trench with a minimum depth 1.2 m of………… shoring shall be installed or the sides shall be sloped or benched and treated as a confined space? 171- Clear space on all sides of excavation shall be at None of the above least……….? 172- Fill material shall be placed in lift not 200mm exceeding…………in loose depth? 173- Fill material shall be placed in lifts not 100mm exceeding…………….in loose depth for hand-operated compaction? 173- Compaction shall begin only after the fill or +-3.0 backfill has been properly placed and the material to be compacted is at the proper moisture content…………………of the optimum moisture content per ASTM D1557 or ASTM D698, whichever is applicable? 174- under foundations with static load over 320kpa 95% and foundations for vibrating or heavy machinery and pavements………of maximum density as determined by ASTM D1557 for cohesive materials? 175- under foundations with static load over 320kpa 85% and foundations for vibrating or heavy machinery and pavements………of relative density as determined by ASTM D4253/ASTM D4254 for cohesive materials? 176- The depth of the test holes for nuclear method 300mm shall be no grater than deep( ASTM D 2922,sec.1.1)? 177- The final finished right of way shall be least ……….meters wide and 178-The final finished right of way shall be at least …………. meters wide and ……………… meters in Sabkha areas? 179- The pipe shall be embedded in clean sand not 300mm less than …………………..above the top of the pipe? 180- The bottom of pipes in the trenches shall be 200mm …………..above the highest recorded ground water level. 181-The width of the sand pad shall be ……………in e) None of the above. Sabkha areas and is required on only one side of the pipeline. 182- LPG Lines, gas lines and oil well flowlines in 900mm and 600mm, trenches shall have a minimum cover of…………., all others shall have……………. 183-Fill or backfill placed beneath footings, grade 90%, beams, mats, buildings, and process areas shall be compacted to at least …………….of the maximum Modified Proctor density as determined by ASTM D1557? 183-Fill or backfill placed beneath footings, grade 70%, beams, mats, buildings, and process areas shall be compacted to at least ……………..relative density for cohesionless free draining soils, as determined by ASTM D4253 and ASTM D4254 shall be used? 184-20. Fine grout mix proportions shall be …….. part a) 1part cement, 0.1 part slaked Portland cement …………….. part slaked lime lime and 2.25-3.0 parts fine and…………………… parts fine aggregates. (ACI 530.1, aggregates. Sec. 2.6B.1)? 185- Coarse grout mix proportions shall be: 1 part 1 part cement, 0.1 part slaked Portland cement; …………….part slaked lime. lime and 1-2.0 parts fine …………….1-2 parts coarse aggregates. (ACI 530.1, Sec. aggregates 2.6B.1)? 186- Alignments of masonry walls shall be within + - 0.5 ……………………for bearing walls (ACI 530.1, Sec. 3.3.G.2.d)? 187- Alignments of masonry walls shall be within + 0.75", …………………..for non-bearing walls. (ACI 530.1, Sec. 3.3.G.2.d)? 188-Plumbness of masonry walls shall be + 0.25"/10' to +0.375”/20', ………………………….. or + 0.5" max. (ACI 530.1, Sec. 3.3.G.2.b)? 189-Portland Cement Plaster Mix Proportions shall 0.1 Part Slaked Lime and 2.25 be: 1 Part Portland Cement; …………… Part Parts Fine Sand Aggregate Slaked Lime; ………………. Parts Fine Sand Aggregate. (ACI 530.1, Sec. 2.6.B.1)? 190- The Total Dissolved Solids (TDS) and pH value of Max 500ppm and 8 to 6, mixing water shall be? 191-Coarse aggregates shall be washed prior to 1000ppm, concrete batching with water containing less than ……………..of total dissolved solids? 192- Any manufactured sand shall be washed with 1000ppm, water prior to batching concrete; the water shall contain less than ……………..of total dissolved solids? 193- Temperature test shall be made with a 115m3, frequency of not less than one test for every ……………..of concrete on each day, or 1 test each day for each class of concrete delivered. (ASTM C94-04, Sec. 16.5) 194- Allowable concrete temperature during delivery 32c, and placement shall be ……………….maximum? 195- The concrete specimens shall be subjected for 23°C±2°C, final curing with free water maintained on their surfaces at all times at a temperature of………………. (ASTM C94/ASTM C-31 Sec. 10.1.3) 196- The compression testing machine shall be 12 months. calibrated once in ………………. (ASTM C-39/C39M Sec. 5.1.1.1.1)? 197- When the extent of damaged coating exceeds 2%, ………….of the surface area of the coated steel reinforcing bar in any 0.3–m (1–ft) length, the coated bar should be rejected. (ASTM A775, Sec. XI.3.8)? 198- Concrete shall be discharged from the mixer 90 minutes or 300 revolutions within ……………………….of the mixer from the time the mixing water was added. ASTM C-94, Sec. 11.7 199- Min concrete cover for permanently exposed 75mm, concrete structures to earth (including foundations over a sub-slab), weather supporting process equipment foundations shall be ……………..? 200- Minimum clear distance from anchor bolts or 100mm, sleeves to edge of concrete shall be………………...? 201-The minimum anchor bolt diameter shall be 20mm, …………………unless specified by the vendor for small equipment or for the anchorage of small miscellaneous items e.g. ladder supports, small piping supports, handrail anchorage, stair stringers, small platforms etc. 202- Maximum total dissolved solids in water used for 1000ppm, moist curing shall not exceed……..? 203- Water curing shall be continuous until the 7days compressive strength has reached 70% of the specified strength, but not less than ………days after placement? 204- Concrete shall not be dropped freely where 1m, reinforcing will cause segregation nor where it would fall freely for more than………………….? 205- Concrete paving shall have control joints or 6m, construction joints located at a maximum spacing of ……………..on center in both directions. 206- Place concrete in layers not to exceed 400mm, …………….thick and consolidate.(ACI 301, Sec. 8.3.1.3) 207- The hot mix asphalt using the conventional 139°C and 163°C, bitumen, shall have a temperature between ……………………………at the time of delivery? 208- At the time of spreading and compaction, the 139°C conventional hot mix asphalt concrete material shall be at least……………...? 209- The hot mix asphalt concrete shall be placed 4c, only when the air temperature is above ……………….and it is not foggy, rainy and the existing surface is free of moisture? 210- Bituminous mixture shall be placed so that after 80mm, rolling, the nominal thickness shall not be more 211- All compaction shall be completed before the 90c, temperature of the mix falls below…………..? 212- The compaction requirements shall be equal to 96%, or greater than …………….of the Marshall density (ASTM D2726/ASTM D1559), based on material sampled from the road site? 213- The total mineral aggregate shall be ………………… 93-96%, by weight of the asphalt mix? 214- The total asphalt binder (asphalt content) shall 4-7%, be ………………….by weight of the asphalt mix? 215-The labortory California Bearing Ratio (CBR) per 25min, ASTM D1883 or AASHTO T-193 for sub base class “A” material at 95% compaction D1557 shall conform to? 216- The labortory California Bearing Ratio (CBR) per 25min, ASTM D1883 or AASHTO T-193 for sub base class “B” material at 95% compaction D1557 shall conform to? 217- The labortory California Bearing Ratio (CBR) per 100mm, ASTM D1883 or AASHTO T-193 for base class “A” material at 100% compaction D1557 shall conform to? 218- The labortory California Bearing Ratio (CBR) per 50min, ASTM D1883 or AASHTO T-193 for base class “B” material at 100% compaction D1557 shall conform to? 219- Max size of road sub base class “A” material 100% passing from sieve size 2.5” shall be ………. 220- Max size of road sub base class “B” material 100% passing from sieve size 2” shall be ……….? 221- Max size of road base class “A” material passing 100% from sieve size 2.5” shall be ……….? 222- Max size of road base class “B” material passing 100% from sieve size 1.5” shall be ……….? 223- The entire subgrade shall be compacted to not 95%, less than ……………of the maximum dry density (ASTM D1557) while within 1.5% of the optimum moisture content (for cohesive soils)? 224- The entire subgrade shall be compacted to not 85%, less than 85% of relative density (ASTM D4253/D4254) (for cohensionless soils)? 225- Granular base materials shall be placed in layers 150mm, of uniform thickness with approved spreaders not exceeding ……………….after compaction? 226- The water content of the base or subbase +- 1.5 material shall be maintained to within………………..of the optimum moisture content per ASTM D-1557 or AASHTO T-180 during compaction? 227- The rolling shall continue until the subbase is 95%, compacted to no less than ………….of the maximum laboratory dry density (per ASTM D-1557 or AASHTO T-180) for the full layer depth? 228- The rolling shall continue until the base 100% materials are compacted to no less than …………..of the maximum laboratory dry density (per ASTM D-1557 or AASHTO T-180) for the full layer depth? 229- Testing shall be conducted at a rate of one test 2000 ft² (180 m²), every …………….. of base or sub-base? 230- Prime coat is to be applied only when the 16C surface to be treated is dry and the atmospheric temperature is ……………. or above? 231- The prime coat shall be applied uniformly to the 0.65 and 1.75 litres/m2, surface of the base using a pressure distributor at a rate between ………………………….? 232-The prime coat shall be applied at a temperature 50C and 80C, between …………………….for MC-70? 233- The prime coat shall be applied at a temperature 65C and 105C between ………………….. for MC-250. 234- The tack coat shall be applied on paved surfaces 0.25 liters/m2., and vertical surfaces which will be in contact with the asphalt paving by means of a bitumen distributor at a maximum rate of ……………………..? 235- Tack coats shall not be placed during rain, on a 16C, moist surface when the air or surface temperature is below………………...? 236-If application of the surface course is delayed by 3 days more than………………, or if dirt, sand, or other impurities have contaminated the tack coat, then a new tack coat shall be applied after the original one has been swept clean? 237- Measurement of any cores shall not be less than 10mm or 15%, ………………of the design thickness, whichever is Less? 238- Core compaction requirements shall be equal to 96%, or greater than ………………….of Marshall density (ASTM D-2726/ASTM D1559) using samples taken at the road site? 239- Minimum Compressive Strength of pre-packaged 5,000psi cement based grout at 28 days shall be……….? 240- Standard temperature of mix shall be 23C + 2C, …………….when test cubes are cast. (ASTM C1107, Sec. 9.1.2)? 241- The compressive strength of the grout shall be a 3500psi, minimum of……………… at 7 days of age. (ASTM C 1107, Sec. 7.2, Table 1)? 242-Grout shall be given a continuous water cure 7 days, (covered by wet burlap and 0.15mm polyethylene) for a minimum of…………... (ASTM C309, Sec. 5.1) 243- Grout placement shall be within the 30 minute, …………………….. at 32 C minimum working time, after mixing. (PIP STS03601, Sec. 6.3.2)? 244- Minimum compressive strength shall None of the above. be…………………. at 7days? 245-The minimum size of a Public Sewer shall be None of the above. ……………….nominal diameter? 246- The maximum distance between manholes for public sewers shall be …………..? 247- Public sewers that are parallel to potable water 2m, lines shall be separated from such lines by a minimum distance of ……………and shall be located below the potable water lines? 248- Minimum pressure rating of valves shall be 12.1 bar, 249- For trenches deeper than……………., RTR pipe shall be assembled in the trench 250- The minimum diameter of a storm drain pipe None of the above. (except building connections) or road crossing culvert shall be……………. 251- Storm drain manholes shall have a minimum inside diameter of …………for straight run manholes with a pipe diameter size of 600 mm or less? 252-Direct Buried Cable / Conduit Trench - A 150 mm, minimum of ……………… dry sand shall be installed 200mm, from bottom of trench to bottom of cable or conduit (as a cushion)? 253- Concrete Duct bank Trench - The top layer of the None of the above. concrete …………..minimum thickness shall be mixed with red dye? 254-Direct Buried Cable / Conduit Trench - A 300 mm, minimum of …………… dry sand cover shall be installed on top of the cable or conduit (as a cushion)? 255- Gypsum board width shall be 1220mm to -2mm, 1370mm with a tolerance of …………..under the specified width. (1997 UBC, Sec. 2502.14; ASTM C36, Sec. 6.2.2) 256- 257- Gypsum board corners shall be square with a +-2 tolerance of …………..over the full width of the board. (1997 UBC, Sec. 2502.14; ASTM C36, Sec. 6.2.5) 258- Wood supports for lath or gypsum board shall not be less than ……………. in least dimension. (1997 UBC, Sec. 2503.2)? 259- Silica fume, when used, shall not be less than 7%, …………..by weight of cement as a replacement? 260- Wood supports for lath or gypsum board shall not be less than …………..in least dimension. (1997 UBC, Sec. 2503.2)? 261- Metal lath runners and furring shall not be less than …………………in least dimension. (1997 UBC, Sec. 2504.4)? 262- The minimum thickness of grout shall be………..? 25mm 263- The minimum thickness of grout between the 25mm foundation and base plates shall be…………..steel Shim and Packings to be provided? 264- In bolted connections, what is the minimum size 20mm of high strength bolts that should be used? a. 16mm? 265- The minimum thickness of gusset and stiffener 10mm plate should be? 266-The minimum time that a plastic sheet should be 16 hours in place on concrete surface to determine its moisture content by plastic sheet method, ASTM D4263 is? 267- The minimum concrete slab thickness supported 100mm(4”) on the ground is a. 75mm(3”)? 268- How many days should a masonry wall be cured 7 days prior to grout pouring for high lift grouted construction? 269-The maximum particle size of fill material shall ½ lift thick be? 270- A fill material to be classified, as “select fill” shall 0 to 20 contain __________% particles passing thru #200 sieves. a. 0 to 5? 271- Fill materials shall be placed in lift or layer not 200mm exceeding __________ in loose depth? 272- Free draining soils or cohesion less material shall 70% be compacted to __________ % relative Density? 273-The minimum compressive strength of structural concrete at 28 days is? 274-Paving slabs subject to vehicular traffic shall have 150mm a minimum thickness of? 275-Control or construction joints for concrete paving 6.0 shall be spaced at a maximum of _________ meters in both directions? 276-Concrete may be allowed to drop freely at a 1m maximum height of? a. 0.5m? 277-Cementations non-shrink grout shall have a 5000psi compressive strength of? a. 2000psi? 278- End lap for metal panels shall not be less than? 250mm 279-A beam with a depth of 8 inches requires 2 ___________ number of rows of bolts? 280- 1. Brittle material A material is brittle if, when subjected to stress, it breaks with little elastic deformation and without significant plastic deformation. Brittle materials absorb relatively little energy prior to fracture, even those of high strength. Breaking is often accompanied by a snapping sound. examples Bone, cast iron, ceramic, and concrete are examples of brittle materials. Materials that have relatively large plastic regions under tensile stress are known as ductile 281-50mm concrete in thickness resistance against 2 hours fireproofing (time) 282-Why we use vibrator? We use vibratory to increase the workability & consolidation of concrete 283-Why Concrete crack appear? Dehydration , shrinkage 284-Natural pozzolan use how much % in cement? 25 % parcent for normal concrete and upto 65% for special strength 285- Bend of bar (bar hook) having dia 16mm or less Up to 16 mm =6db for ties & also bend Angle? strips =4db Upto 25 mm =6db = 6db Upto 36 mm =8db 43 , 57 mm = 10 db As per ACI-318M 286-Mixing of water in cement according to which 318 , ASTM-C-1602 standard 287-Aggregate Washing water (TDS) 3500 ppm (parts per million) 288-Minimum size of Aggregate in concrete 10mm 289-Maximum size of Aggregate in concrete 20mm 290-Clean sand passing (200 sieve) %. Less than 10% 291-Sulpher extended asphalt temperature at the 130° to 140°C time when it leaves to batch plant. 292-Temperature of concrete. 35°C 293-Grout temperature. 23+-3 294-Cementations Grout compressive strength. 5000psi 295-Minimum thickness of vehicles paving concrete 150mm slab? 296-Structural concrete compressive strength. 7 days strength = Psi (35MPA) 7 days strength =4000 Psi (28MPA) 297-Size of marl? Maximum size of marl is 75 mm 298-Precast concrete compressive strength. 5000psi 299-TDS in water for mixing and curing of grout 500ppm 300-Maximum TDS in water for curing concrete. 1000ppm 301-Min curing for concrete 7days 302-Equipment made of aluminum alloys shall be No use in concrete 303-Vibrator shall be used for movement of concrete No after placement 304-Re-tempering of concrete after placement is allowed 305-Slump cone height 300mm 306-Concrete cylinder size 15cm dia, 30cm height. 307-Using cement 350kg to 370kg to attain how 4000psi much compressive strength 308-Maximum drop height of concrete 1m 309-Shoring required for excavation depth 1.2m exceeding? 310-Maximum compaction required for cohesion 85% less material when pressure above to 320kpa. 311-Rsidental group minimum size of bed room door.9m *2.1 size 312-Cantilever slab thickness l/10 313-cemetric tile joint smoothness tolerance 3mm 314-Minimum spacing of rebar in the slab, bridges Less than 32mm 315-Mixing of water in cement according to which ASTM-C-1602 standard 316-Adding the chemical to concrete what happen. a) Cracks & reducing the slump b) increasing the slump & workability c) reducing the workability & slump 317-Using the proper vibrator in concrete 318-Alumnum parts inside the concrete 319-End of vibrator as coating bars used in concrete 320-Maximum droping height of concrete 321-Maximum time to reach the concrete at sight 322-Height of slump cone 323-Maximum concrete tempreture 35 324-Concrete cylinder size 150 cm *300cm 325-HDG Gelvinzid inside the concrete is allowed 326-Blow foundation applying 327-Using cement 350kg to 370kg to attain how 4000psi much compressive strength. 328-Compressive strength of non shrink cementious 5000 psi grout 329-Exposed below the ground under water Types 5 foundation which type cement used 330-Post tension of steel bars After concreting 331-Minimum thickness of traffic paving slab 150mm 332-Maximum distance epoxy grout joint? 1.4 m 333-MC-1 curing time 24 hour 334-Minimum thickness of anchor bolts using fixing 20mm 18 mm ladder 335-Base plates minimum thickness 10 mm 336-Minimum distance of anchor bolts from edge of 100mm concrete 337-Minimum trench width Pipe size +300mm 338-Shoring required for excavation depth exceeding. 1.2m 339-Minimum compaction required for general fill of MDD+OMC using 340-General fill lose thickness 300mm 341-Compaction water TDS 10000 PPM 342-Temperature of sulpher extended asphalt mix shall be between 130 to 140 when it leaves the plant 343-The temperature of asphalt mix without sulpher shall be between 139 to 163 344-The prime coat shall be apply uniformly to the surface using the pressure distributer at a rate between 0.65 to 1.75 liter /sequre materand temperature should be forMC-70 50 to 80 degree & MC-250 65 TO 105 degree 345-The prime caot shall be permitted to cure until penetration into under laying surface has been approved by Saudi Aramco representive but no time curing period shall be less than 24 hours. The prime shall be fully cured and set before placing the mixed asphalt 346-Core compaction shall be equal to or greater than 96 % of marshal density as per ASTM d-1559 using the material sampling at road site 347-Clean sand or dune sand cover for pipe should be 150 to 300mm 348-Cantilever slab thickness= L/10 349-Standard specification to adding the water in production of hydraulic concrete =ASTM-C-1602 350-Maximum height of droping concrete is 1 meter. 351-Using the 350kg-370kg cement we can get compressive strength = 4000 psi 352-Using the 350kg-370kg cement we can get compressive strength = 4000 psi 353-Exposed below the ground water which one concrete will be used= type v 354-Minimum distance of anchor bolt from the edge of concrete should be 100mm 355-For standard temperature testing maintain the grout mixture and testing equipment at a temperature 23+-3 (ASTM-C-1107) 356-Maximum TDS for using water of curing should be 1000 ppm 357-Minimum dia of anchor bolts should be 20mm. 358-The material passing through the sieve no. 200 should be 0-20 % 359- PIP-STS-03600 Non shrink cementious grout , PIP-STS-03601 epoxy grout , PIP –STS-05130 Erection of steel structure 360-One way slab 361-Two-way slab 362-What is the brittle material? A material is brittle if, when subjected to stress, it breaks with little elastic deformation and without significant plastic deformation. Brittle materials absorb relatively  little energy prior to fracture, even those of high strength. Breaking is often accompanied by a snapping sound. examples Bone, cast iron, ceramic, and concrete are examples of brittle materials. Materials that have relatively large plastic regions under tensile stress are known as ductile 363-What is the minimum size & distance of rebar 12 mm 1.2 meters use in building 364-When post tension force is used? After concrete finished 365-Natural pozzlan used up to Up to 25% for normal concrete and for special strength up to 65 % VCH 366-Calcroius material effect in aggregate Make voids and lower cement strength 367- If WC less Increase the strength 368- Slump cone height 300 mm 369- Door height 2.10 heights and.9 breadth 370- 8 inch beam having how many layre of bolts 1 Bar bending as per astm 371- Sampling fresh concrete ASTM-C-172 372- If epoxy grout is poured 100mm or more so we have to install the Reinforcement 373- Expansion joints used for large epoxy grout to reduce the possibility of cracks 1.4 meter and joint width shall be.25 mm 374- Curing and mixing water for grout 500 ppm 375- 2 pips standard PIP-STS-03600 , PIP-STS-03601 , PIP –STS-05130 , PIP-STS-05121 376- If sub grade CBR less than 5 Use 200 mm sub base material layer 377- Prime coat curing time 24 hours 378- At W/C 0.4 the compressive strength of grout 5000 psi after 28 days? 379- Minimum thickness of Grout 25mm 380-compressive strength of precast concrete 5000 psi 381-marshal density of asphalt 96% 382-Base coarse compaction 98% 383-Asphalt Binder Ratio? 4-7% 384-if sub-grade material have less than 5% CBR the 200mm & 25 base coarse material how much CBR & Thickness 385-tack coat ratio 25 liter/m2 386-from work tolerance class A 3mm per meter 387-concrete 7 days compressive strength 3500 psi 388-water used for compaction 10000 ppm 389-grout curing TDS 500 ppm 390-concrete curing TDS 1000 ppm 391-sand washing water TDS? 3500 ppm 392-Non shrink cementious grout PIP PIP – STS – 03600 393-Shoring requires When excavation is more than 1.2 m 394- 2-way slab Span should be less tha l/2 395-general fill material in lose depth 300mm 396-clean sand passing through the sieve #200 Less than 10 % 397-if excavation is more than -------------- then we 6m need excavation plan 398-mix design valid for ………………….. 2 years 399-coated conduit inside the concrete is allowed Yes 400- fly ash who much used in concrete 15-20% by weight of cement 401-Cement used in hollow block 402-Young modlus definition. 403-Floor tile straight edge tolerance. 404-Spalling in concrete 405-Chemical effect on concrete. 406-16mm hock dia 407-Cold joint definition 408-Crack in concrete definition 409-Maximum concrete contect in structural concrete 410-Which type of vibrator used in concrete 411-Minimum size of anchor bolts 412-End of concrete edge from anchor bolt 413-Base and sub base material compaction ( answer in CBT was as per old standard) 414-For relative density which values required? 415-Aluminum parts allow in concrete or no 416-Base material compaction (only question for ) 417-Size of slump cone 418-Fill material thickness 419-General fill material thickness in loose material 420-Which SEAS we use for sudia Aramco 421-TDS for compaction water 422-8Rows of bolt in 8 inch beam 423-CMU curing time? 424-7 days epoxy Grout strength 425-Non shrink cementious grout strength 426-Minimum spacing in rebar 427-Stiffner plate thickness 428-Minimum slab thickness 429-The minimum concrete slab thickness supported on the ground is? 430-Minimum compressive strength of structural concrete at 28 days is? 431- the prime coat for asphalt paving shall be cured minimum of not less than ….hours ? 432-Curing of concrete shall be done continuously for at least …….. days ? 433- No marl fill material shall be retained on ……..sieve? 434-Concrete shall be discharged from the mixer within……… of mixer from the time the mixing water was added. ASTM C-94,sec. 11.7 435- place concrete in the layers not exceed thick and consolidate.( ACI301,sec.8.3.1.3) 436- The laboratory California bearing ration (CBR) per ASTM D1883 or AASHTO T-193 for base class material at 100% compaction DD1557 shall conform to ………… 437-Testing shall be conducted at a rate of the one test every……… of base or sub-base 438- If application of the surface course is delayed by more than…………. Or if dirt, sand, or other impurities have contaminated the tack coat, then a new tack shall be applied after the original one has been swept clean. 439-Gypsum board width shall be 1220mm to 1370mm with a tolerance of under the specified width. (1997 UBC,sec.2502.14ASTM C36,sec.6.2.2) 440-How many days should a masonry wall be cured prior to grout pouring for high lift grouted construction? 441-Light weight aggregate shall have dry loose weight of …….or less 442- Reinforcement bar used to resist shear and torsion stresses in structural member is? 443-Minium clear spacing between parallel bar in a layer shall be …? 444-The minimum bend diameter for No.16 Bar commonly used for stripups and ties shall be …….? 445- The minimum time that plastic sheet should be in place on concrete surface to determine it is moisture content by plastic sheet method, ASTM D4263 is ? 446- End of vibration to be covered with as coated bar used in concrete? 447- Dune sand or clean sand used, as fill material requires a cap layer of cohesive material, 150mmm thick to 300mm thick? 448-Base and subbase of asphalt paving shall be compacted to …… and …… % respectively of the maximum labaroratory density? 449- ACI means, 450 Amount selected fill material passing ………….sieve shall be 100% 451- Compaction shall begin only after the fill or backfill has been properly place and the material TO compacted is at the proper moisture content ………… of the optimum moisture content per ASTM D1557 or ASTM D698, whichever is applicable? 452- Fill or backfill place beneath footings, grade beams, , mats , buildings, and process areas shall be compacted to at least ……… % of the maximum Modified protector density as determined by ASTM D1557? 453- When the extent of damaged coating exceeds ………. % of the surface area of the coated steel reinforcement bar in any7 0.3-( 1FT length the coated bar should be rejected.(ASTM A7785sec.)