Description : Bitumen of grade 80/100 means (A) Its penetration value is 8 mm (B) Its penetration value is 10 mm (C) Its penetration value is 8 to 10 mm (D) Its penetration value is 8 to 10 cm
Last Answer : Answer: Option C
Description : The ductility value of bitumen for suitability in road construction should not be less than (A) 30 cm (B) 40 cm (C) 50 cm (D) 60 cm
Description : In the penetration macadam construction, the bitumen is (A) Sprayed after the aggregates are spread and compacted (B) Premixed with aggregates and then spread (C) Sprayed before the aggregates are spread and compacted (D) None of the above
Last Answer : Answer: Option A
Description : Penetration test determines the __________ of the grease. (A) Stiffness (B) Lubricating properties (e.g. oilness) (C) Service temperature (D) Variation in viscosity with temperature
Last Answer : (A) Stiffness
Description : __________ test is done to find out the softening point of bitumen. (A) Impact (B) Ball and ring (C) Flame (D) Viscosity
Last Answer : (B) Ball and ring
Description : Select the correct statement. (A) Quantity of binder required for tack coat is less than that required for prime coat (B) Prime coat treatment is given for plugging the voids in water ... the final coat over certain previous bituminous pavements (D) A bitumen primer is a high viscosity cutback
Last Answer : Answer: Option D
Description : Which of the following represents hardest grade of bitumen? (A) 30/40 (B) 60/70 (C) 80/100 (D) 100/120
Description : Explain the procedure for determining softening point of bitumen.
Last Answer : Procedure for determining softening point of bitumen:- 1) Sample material is heated to a temperature between 750 C to 1000 C above the approximate point until it is completely fluid and is poured in ... glycerin is used in heating medium and the starting temperature is 350 C instead of 50 C.
Description : Road grade bitumen is produced from vacuum residue by its (A) Aeration (B) Pyrolysis (C) Hydrogenation (D) Steam reforming
Last Answer : (D) Steam reforming
Description : Softening point of bitumen to be used for read construction at a place where maximum temperature is 40°C should be (A) Less than 40°C (B) Greater than 40°C (C) Equal to 40°C (D) None of the above
Last Answer : Answer: Option B
Description : Pick out the wrong statement. (A) Pensky-Marten apparatus is used for determining flash points above 50°C (B) Characterisation factor of paraffinic crude oil is more than 12 (C) Abel ... An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index
Last Answer : (D) An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index
Description : Which parameter is used for the grading of paraffin waxes? (A) Specific gravity (B) Melting point (C) Viscosity (D) Penetration number
Last Answer : (C) Viscosity
Description : Consider the following statements: 1. Standard penetration test is commonly used for cohesionless soils. 2. Standard penetration test results in respect of a cohesionless soil are correlated to its density index and friction angle. 3. Use of H- ... 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only
Last Answer : (a) 1, 2 & 3
Description : In CBR test the value of CBR is calculated at (A) 2.5 mm penetration only (B) 5.0 mm penetration only (C) 7.5 mm penetration only (D) Both 2.5 mm and 5.0 mm penetrations
Description : The observed N- value from a standard penetration test conducted in saturated sandy strata is 30; the N- value corrected for dilatancy may be taken as : (b) 15 (a) 20 (c) 23 (d) 39
Last Answer : (c) 23
Description : Explain Softening Point Test on Bitumen with neat sketch.
Last Answer : Softening Point Test: The softening point test is conducted by Ring and Ball method in the laboratory as described below: The test sample of the given bituminous material is put ... values and thus the suitability of the bitumen under test is decided for bituminous pavement construction.
Description : Purity of water can be assessed by determining one of its following properties instrumentally : (A) pH (B) Refractivity (C) Viscosity (D) Conductivity
Last Answer : (D)Conductivity
Description : The binder normally used in flexible pavement construction is (A) Cement (B) Lime (C) Bitumen (D) None of the above
Description : Which of the following represents a carpet of sand-bitumen mix without coarse aggregates? (A) Mastic asphalt (B) Sheet asphalt (C) Bituminous carpet (D) Bituminous concrete
Description : Pavement is said to be flexible if it contains (A) Water bound macadam surface (B) Stabilised soil base constructed of lime cement or tar (C) Bitumen-bound stone layer of varying aggregates (D) All the above
Description : Percentage of free carbon in bitumen is (A) More than that in tar (B) Less than that in tar (C) Equal to that in tar (D) None of the above
Description : Bitumen paints offer (A) Pleasing surface (B) Hard surface (C) Smooth surface (D) Protective surface
Description : Plastic bitumen is generally used for (A) Road pavements (B) Expansion joints (C) Crack fillings (D) None to these
Description : Bitumen emulsion is (A) A liquid containing bitumen in suspension (B) A paint (C) Used as anti-corrosive paint (D) All the above
Description : The filler used in plastic bitumen, is (A) Shale powder (B) Talc powder (C) Asbestos powder (D) Plastic powder
Description : Bitumen felt (A) Is used as water proofing material (B) Is used as damp proofing material (C) Is made from bitumen and hessian fibres (D) All the above
Description : Asphalt is obtained from (A) Petroleum distillation (B) Bitumen distillation (C) Plastic distillation (D) None of these
Description : Bitumen in (A) Solid state, is called asphalt (B) Semi fluid state, is called mineral tar (C) Fluid state, is called petroleum (D) All the above
Description : According to ISI, bitumen is classified into (A) 2 grades (B) 4 grades (C) 8 grades (D) 10 grades
Description : Bitumen completely dissolves in (A) Carbon bisulphide (B) Chloroform (C) Coal tar (D) All of these
Description : Bitumen felt is used for (A) Water proofing (B) Damp proofing (C) Both (A) and (B) (D) Neither (A) nor (B)
Description : For filling cracks in masonry structures, the type of bitumen used, is (A) Cut-back bitumen (B) Bitumen-emulsion (C) Blown bitumen (D) Plastic bitumen
Description : Bitumen is generally obtained from (A) Organic material (B) Synthetic material (C) Petroleum product (D) Coal
Description : Bitumen may be dissolved in (A) Carbondioxide (B) Water (C) Sodium chloride (D) Carbon disulphide
Description : What are your thoughts on changing the oil viscosity to a higher grade as an engine wears more?
Last Answer : answer:If anything It’ll just reduce your estimated MPG by a fractional amount. HOWEVER, upon further research, it might not be too GOOD for an engine. Because if it’s consuming a lot of oil, it could be signs of a deeper problem. You could try one of those “high mileage” oils.
Description : While determining the yield of open wells by the pumping test (A) Velocity of recharging water, increases with depression head (B) Depression head resulting at critical velocity, is called critical ... (D) Maximum safe yield of an open well, is expected at critical depression head
Last Answer : (D) Maximum safe yield of an open well, is expected at critical depression head
Description : In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be (A) Less than 300 mm (B) Between 300 mm and 750 mm (C) Between 750 mm and 1 m (D) Greater than 1 m
Last Answer : (B) Between 300 mm and 750 mm
Description : For determining the ultimate bearing capacity of soil, the recommended size of a square bearing plate to be used in load plate test should be 30 to 75 cm square with a minimum thickness of (A) 5 mm (B) 10 mm (C) 15 mm (D) 25 mm
Description : Unconfined compression test it most suitable for determining the : 1. Sensitivity of clays 2. Settlement of embankments 3. ‘Strength’ of partially saturated clay sample 4. ‘Strength’ of fully saturated clay sample (a) 1, 2, 3 and 4 (b) 2 and 3 only (c) 3 and 4 only (d) 1 and 4 only
Last Answer : (d) 1 and 4 only
Description : For determining the compressive strength test on cement is, the percentage amount of water to be added as (Pa = Percentage of water for required consistency) [ A ] 0.25 Pa + 2.5 [ B ] 0.25 Pa + 3.5 [ C ] 0.35 Pa + 2.5 [ D ] 0.35 Pa + 3.5
Last Answer : [ B ] 0.25 Pa + 3.5
Description : While determining the workability of concrete mix, the compaction factor test is ------than the slump cone test [ A ] Less accurate [ B ] More accurate [ C ] Approximate method [ D ] None of the above
Last Answer : [ B ] More accurate
Description : The property by which a body returns to its original shape after removal of the force, is called (A) Plasticity (B) Elasticity (C) Ductility (D) Malleability
Last Answer : (B) Elasticity
Description : Percentage elongation during tensile test is indication of (a) Ductility (b) Malleability (c) Creep (d) Rigidity
Last Answer : (a) Ductility
Description : The property of a material by which it can be beaten or rolled into thin plates, is called (A) Malleability (B) Ductility (C) Plasticity (D) Elasticity
Last Answer : (A) Malleability
Description : The property of a material by which it can be drawn to a smaller section, due to tension, is called (A) Plasticity (B) Ductility (C) Elasticity (D) Malleability
Last Answer : (B) Ductility
Description : The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known (A) Porosity (B) Plasticity (C) Permeability (D) Ductility
Description : High carbon content in the steel causes (A) Decrease in tensile strength but increase in ductility (B) Increase in tensile strength but decrease in ductility (C) Decrease in both tensile strength and ductility (D) Increase in both tensile strength and ductility
Description : Due to circumferential action of the spiral in a spirally reinforced column (A) Capacity of column is decreased (B) Ductility of column reduces (C) Capacity of column is decreased but ductility of column increases (D) Both the capacity of column and ductility of column increase
Description : Due to Circumferential action of the spiral reinforcement in a column [ A ] Capacity of column is decreased but ductility of column increases [ B ] Both the capacity of column an ductility of column increases [ C ] Capacity of column increases [ D ] Ductility of the column reduces
Last Answer : [ B ] Both the capacity of column an ductility of column increases
Description : For ductility consideration, the maximum percentage of steel used should not exceed ------- of the balanced steel [ A ] 25% [ B ] 50% [ C ] 60% [ D ] 75%
Last Answer : [ D ] 75%