Description : Which of the following correspond to the recommendations of IRC for pavement thickness determination by CBR Method ? 1. CBR tests are to be conducted in-situ 2. Static compression is best adopted 3. The top 50 cm of sub grade ... 1, 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 1 and 3 only
Last Answer : (c) 2 and 3 only
Description : Select the correct statement. (A) More the value of group index, less thickness of pavement will be required (B) More the value of CBR, greater thickness of pavement will be required (C) Minimum and maximum values of group index can be 0 and 20 respectively (D) All of the above
Last Answer : Answer: Option C
Description : Design of flexible pavement, involves (A) Wheel loads (B) Intensity of traffic (C) Climate of the region (D) Sub-grade conditions
Description : Cement grouted pavement is classified as (A) Rigid pavement (B) Semi-rigid pavement (C) Flexible pavement (D) None of these
Last Answer : B
Description : Bottom-most component of a flexible pavement, is (A) Sub-grade (B) Sub-base (C) Base (D) Base course
Last Answer : Answer: Option A
Description : Following type of pavement is generally known as flexible pavement (A) Water-bound macadam roads (B) Stabilised soil roads (C) Road constructed with various layers of building material well compacted (D) All the above
Last Answer : Answer: Option D
Description : Minimum thickness of the base of a flexible pavement, is (A) 10 cm (B) 15 cm (C) 20 cm (D) 25 cm
Description : The binder normally used in flexible pavement construction is (A) Cement (B) Lime (C) Bitumen (D) None of the above
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 : Flexible pavement distribute the wheel load (A) Directly to sub-grade (B) Through structural action (C) Through a set of layers to the sub-grade (D) None of the above
Description : The Westergaard analysis is used for (A) Sandy soils (B) Cohesive soils (C) Stratified soils (D) Clayey soils
Last Answer : (C) Stratified soils
Description : The width of pavement in addition to a gravelled berm 1 m on either side for a two directional traffic recommended by Nagpur Conference of Chief Engineers, is (A) 4.7 m (B) 5.7 m (C) 6.7 m (D) 7.7 m
Description : Discuss the causes of failure in flexible and rigid pavement.
Last Answer : Causes of failure in flexible pavement: The following are the causes of failure in flexible pavement: 1) Ineffective road surface drainage system such as, (i) inadequate cross slope of the ... joints or even non-uniform settlement of the pavement slabs resulting in deterioration in riding quality.
Description : Roughness index of roads, is expressed as (A) Size of the stone on the pavement (B) Number of patches on the pavement (C) Cumulative deformation of surface per horizontal distance (D) Type of the road surface
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 : For the design of cement concrete pavement for corner loading, Indian Road Congress recommends the use of (A) Westergaard's formula (B) Kelly's formula (C) Goldbeck's formula (D) Picker's formula
Description : Area of steel required per metre width of pavement for a length of 20 m for design wheel load 6300 kg and permissible stress in steel 1400 kg/cm2 , is (A) 70 kg/sq cm (B) 80 kg/sq cm (C) 90 kg/sq cm (D) 100 kg/sq cm
Description : A district road with a bituminous pavement has a horizontal curve of 1000 m for a design speed of 75 km ph. The super-elevation is (A) 1 in 40 (B) 1 in 50 (C) 1 in 60 (D) 1 in 70
Description : Steel Beam theory is the method of analysis and a design of [ A ] Singly reinforced sections [ B ] Doubly reinforced sections [ C ] Both (a) and (b) [ D ] Steel structures only
Last Answer : [ B ] Doubly reinforced sections
Description : According to IRC : 52-1973, for a single lane National Highway in hilly region, (A) Width of the carriageway must be 3.75 m (B) Shoulders on either side must be 1.25 m (C) Total width of the road-way must be 6.25 m (D) Total of the above
Description : As per IRC recommendations, the average level of illumination on important roads carrying fast traffic is (A) 10 Lux (B) 15 Lux (C) 20 Lux (D) 30 Lux
Description : Design of flexible pavements is based on (A) Mathematical analysis (B) Empirical formulae (C) A compromise of pure theory and pure empirical formula (D) None of these
Description : Does anyone know a good comic book (cbr) reader for mac? (also a .pdf ebook reader would be nice too (also for mac)?
Last Answer : i tend to use FFView, because it’s simple yet very powerfull for comics :)
Description : What is the full form of CBR ?
Last Answer : CBR stands for Crudb Birth Rate.
Description : Define CBR and write the significance of CBR .
Last Answer : i) Definition : The California Bearing Ratio abbreviated as CBR is defined as the ratio of test load to the standard load, expressed as percentage for a given penetration of plunger ii) ... It is used for evaluating the suitability of subgrade, sub - base and base course materials.
Description : Explain California bearing Ratio Test with neat sketch to determine % CBR of given soil sample.
Last Answer : Procedure of California Bearing Ratio Test: 1. Take a given soil; sample and add water equal to OMC of soil to prepare wet mix soil. 2. Take the CBR mould of 150 mm diameter and 175 mm height. Keep it ... Bearing Ratio of given soil as % CBR = (Test load / Standard load ) X 100.
Description : California Bearing Ratio method of designing flexible pavements is more accurate as it involves (A) Characteristics of soils (B) Traffic intensities (C) Character of the road making materials (D) None of these
Description : Steel beam theory is used for (A) Design of simple steel beams (B) Steel beams encased in concrete (C) Doubly reinforced beams ignoring compressive stress in concrete (D) Beams if shear exceeds 4 times allowable shear stress
Description : For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to (A) 10 (B) 15 (C) 20 (D) 25
Description : For initial estimate for a beam design, the width is assumed (A) 1/15th of span (B) 1/20th of span (C) 1/25th of span (D) 1/30th of span
Description : The ‘transmission length’ requirement is to be satisfied in the design of (a) Pre-tensioned concrete beams (b) Post-tensioned concrete beam (c) Unbonded post-tensioned concrete (d) Post-tensioned continuous concrete beams
Last Answer : (a) Pre-tensioned concrete beams
Description : Depth of reinforcement below the surface of a concrete pavement, is generally kept (A) 5 cm (B) 6 cm (C) 7 m (D) 9 m
Description : The minimum width of the pavement of a National Highway should be (A) 4.7 m (B) 5.7 m (C) 6.7 m (D) 7.7 m
Last Answer : Answer: Option B
Description : The pavement width of a road depends upon (A) Terrain (B) Type of traffic (C) Number of lanes (D) All the above
Description : The basic formula for determination of pavement thickness was first suggested by (A) Spangler (B) Picket (C) Kelly (D) Goldbeck
Description : Pick up the incorrect statement from the following. The super-elevation on roads is (A) Directly proportional to width of pavement (B) Directly proportional to velocity of vehicles (C) Inversely proportional to acceleration due to gravity (D) Inversely proportional to the radius of curvature
Description : Non-passing sight distance along a road is the longest distance at which the driver of a moving vehicle, may see an obstacle on the pavement (A) 10 cm high (B) 25 cm high (C) 50 cm high (D) 100 cm high
Description : The convexity provided to the carriageway between the crown and edge of the pavement, is known as (A) Super-elevation (B) Camber (C) Height of the pavement (D) None of these
Description : In cement concrete pavements, tensile stress is due to: (A) Bending or deflection under wheel loads (B) Difference in temperature of the top and bottom of pavement (C) Contraction of slab during falling temperature (D) All the above
Description : To prevent movement of moisture from sub-grade to road pavement at the same level as that of water-table, thickness of a cut off layer of coarse sand, is (A) 15 cm (B) 20 cm (C) 30 cm (D) 45 cm
Description : To indicate proper control of consistency of a freshly mixed concrete for pavement construction, the slump should be between (A) 3 to 5 cm (B) 4 to 6 cm (C) 5 to 7 cm (D) 7 to 10 cm
Description : If d is the thickness of a concrete pavement, the equivalent radius b of resisting section for an interior loading, is (A) b = d 2 ) - 0.675 d (B) b = d 2 ) + 0.675 d (C) b = d 2 ) - 3.675 d (D) b = d 2 ) - 0.675 d
Description : The width formation of a road means the width of (A) Carriageway (B) Pavement and shoulders (C) Embankment at ground level (D) Embankment at the top level
Description : Full amount of extra width of a pavement on the curve, is provided at (A) Beginning of the transition curve (B) Centre of the transition curve (C) Beginning of the circular curve (D) Centre of the circular curve
Description : If the width of a pavement slab is 7.5 m, thickness 20 cm and working stress 1400 kg/cm2 , spacing of 10 mm tie bars for the longitudinal joint, is (A) 10 cm (B) 20 cm (C) 30 cm (D) 40 cm
Description : Concrete pavement is provided if daily traffic per lane exceeds (A) 500 tonnes (B) 750 tonnes (C) 1000 tonnes (D) 1250 tonnes
Description : For a 6.6 m wide two lane pavement, berms are provided on either side having a width of (A) 1.00 m (B) 1.25 m (C) 1.50 m (D) 1.75 m
Description : On a pavement with parabolic camber, the angle of inclination of the vehicles will be (A) More at the crown (B) Less at the edges (C) More at the edges (D) Same at the edges as well as at the crown
Description : If the difference in elevation of an edge of the pavement 9 m wide and its crown is 15 cm, the camber of the pavement, is (A) 1 in 60 (B) 1 in 45 (C) 1 in 30 (D) 1 in 15