WBPSC AE Civil 2012 question paper with answers

Q1.In chute spillway, flow is usually

1. Uniform
2. Subcritical
3. Critical
4. Super critical

Q2.Minimum value of superelevation of a road with premix carpet surfacing is

1. 7.0%
2. 2.0%
3. 3.0%
4. 0.5%

Q3.Compaction refers to a process by which compression is effected due to

1. Expulsion of water from voids
2. Shear failure
3. Dilatancy
4. Reduction of air voids

Q4.The quick sand condition takes place when the hydraulic gradient exceed

1. (1-G)/(1+c)
2. (1+c)/(G-1)
3. (1+c)/(1-G)
4. (G-1)/(1+c)

Q5.Bond strength in a reinforced concrete beam can be increased most economically by

1. Increasing the depth of the beam
2. Using thinner bars but in more number
3. Using thicker bars but less in number
4. Providing vertical stirrups

Q6.Two small orifices A and B of diameter 1 cm and 2 cm respectively are placed on the sides of a tank at a depth h1 and h2 below open liquid surface. If the discharges through A and B are equal, the ratio of h1 and h2 (assuming equal cd value for both) will be

1. 16:1
2. 8:1
3. 4:1
4. 2:1

Q7.Cyclonic precipitation is due to

1. Orographic lifting
2. Convergence of storms towards a low pressure belt
3. Divergence of storms
4. Conflict between cold and warm air masses

Q8.Algae-bacteria symbiosis is observed in

1. Aerated lagoon
2. Stabilisation pond
3. Aeration tank
4. Oxidation ditch

Q9.An artificial stone made from pieces of marble and cement and used for floors, facing of walls etc. is known as

1. Mosaic
2. Terrazo
3. Marble
4. Teracotta

Q10.Rapid curing cutbacks are produced by dissolving straight run-bitumen in

1. Naptha
2. Kerosene
3. Diesel
4. Lubricant oil

Q11.The hydrometer analysis is performed to determine the

1. Specific gravity of soil mass
2. Specific gravity of solid constituents
3. Grain size distribution
4. Relative density

Q12.In bituminous mix if void space is kept very less, the distress that may occur is

1. Hungry surface
2. Fatty surface
3. Streaking
4. Slippage

Q13.Increase in fineness modulus of aggregate indicates

1. Finer grading
2. Coarser grading
3. Gap grading
4. Uniform grading

Q14.Kinematic veiscosity (γ) is related to mass density (ρ) and dynamic viscosity (μ) as

1. μ/ρ
2. ρ/μ
3. μρ
4. √(μρ)

Q15.Deep foundations are normally defined as those that have depth to width ratio

1. Greater than 4
2. Less than 4
3. Equal to 2
4. Greater than 2

Q16.The main constituent of varnish is

1. Turpentine oil
2. Petrol
3. Resin
4. Drier

Q17.The 'Environment (Protection) Act' came into existence in India in the year

1. 1973
2. 1986
3. 1993
4. 1990

Q18.The velocity potential for a 2 Dimensional flow is given by φ = x(2y-1). The velocity at the point (2,2) is given by

1. 3 units
2. 4 units
3. 5 units
4. 10 units

Q19.The specific energy E in a critical flow at depth yc occuring in a triangular channel is given by

1. E = 1.25yc
2. E = 1.5yc
3. E = 1.75yc
4. E = 2yc

Q20.A sample of water contains the following Ca++ = 200 mg/l as CaCO3, Mg++ = 1 mcq/l, Na+ = 75 mg/l as CaCO3. Total hardness of the water sample will be

1. 325 mg/l as CaCO3
2. 6.5 meq/l
3. 5.0 meq/l
4. 200 mg/l as CaCO3

Q21.Maximum distance between expansion joint in structure as per relevatn code, is

1. 20 m
2. 30 m
3. 45 m
4. 60 m

Q22.The compressive strength of concrete determined from 15 cm × 15 cmφ cylinder as compared to that from 15 cm × 30 cmφ cylinder, is

1. More
2. Less
3. Equal
4. Dependant on mix proportion

Q23.Length to diameter ratio for cylindrical specimen of soil for triaxial shear test is normally

1. 1.0
2. 1.5
3. 2.0
4. 2.5

Q24.In a rigid pavement most critical location is

1. Interior
2. Edge
3. Corner
4. All of the above

Q25.For the upstream face of an earthen dam, most adverse condition for stability of slope is

1. Sudden drawdown
2. Steady seepage
3. During construction
4. Sloughing of slope

Q26.A butt weld is specified by

1. Effective throat thickness
2. Plate thickness
3. Size of weld
4. Penetration thickness

Q27.If an activity has its optimistic, most likely and pessimistic times us 2, 3, and 7 respectively, the expected time and variance are

1. 3.5 and 5/6
2. 5 and 25/36
3. 5 and 5/6
4. 3.5 and 25/36

Q28.The purpose of lateral ties in short RC column lies in to

1. Avoid buckling of longitudinal bars
2. Facilitate construction
3. Increase the load carrying capacity of the column
4. Facilitate compaction of concrete

Q29.In case of single angle in tension corrected by one leg only the net effective area as per codal provision is (a, b = leg areas)

1. Gross area of holes
2. a + b/(1+0.33(b/a))
3. a + b/(1+0.2(b/a))
4. a + b/(1+0.35(b/a))

Q30.A tension crack usually forms in the soil nearer the top of the wall up to a depth Z given by

1. (2C/γ)√ka
2. 2C/(γ√Ka)
3. 4C/γ
4. (4C/γ)√Ka

Q31.Load safety factor for expressway may be taken as

1. 1.0
2. 1.1
3. 1.2
4. 1.3

Q32.If BOD of a wastewater sample is found as 180 mg/l after 5 days at 20°C, the BOD value for one day and at same temperature will be [assume K1 (base e) = 0.23/day]

1. 48 mg/l
2. 54 mg/l
3. 94 mg/l
4. 220 mg/l

Q33.Which of the following conditions to be satisfied both in elastic and plastic analyses?

1. Equilibrium condition
2. Yield condition
3. Plastic moment condition
4. Mechanism condition

Q34.Rate of change of bending moment is equal to

1. Shear force
2. Deflection
3. Slope
4. Rate of loading

Q35.The coefficient of earth pressure is defined as the ratio of

1. Effective stress to neutral stress
2. Total stress to effective stress
3. Vertical stress to horizontal stress
4. Horizontal stress to vertical stress

Q36.Granite contains primarily

1. Quartz
2. Quartz and feldspar
3. Mica
4. Quartz and mica

Q37.Intermediate vertical stiffeners are provided in plate girder to

1. Eliminate web buckling
2. Eliminate local buckling
3. Transfer concentrated load
4. Prevent increasing deflection

Q38.The resultant sound pressure level of two sound sources each having a sound pressure level of 50 dB is

1. 100 dB
2. 120 dB
3. 15.5 dB
4. 53 dB

Q39.Slow setting cement will have higher percentage of

1. Tricalcium aluminate
2. Tricalcium silicate
3. Gypsum
4. Di-calcium silicate

Q40.In an earthen dam the phreatic line is

1. A straight line
2. Parabolic
3. Circular
4. Elliptical

Q41.In the slope deflection equation the deformation is considered to be caused by

1. Bending moment
2. Shear force
3. Axial force
4. All of the above

Q42.In 1:20 model of stelling basin, the height of hydraulic jump in the model is obseved to be 20 cm. What would be the corresponding height of jump in the prototype?

1. 40 cm
2. 80 cm
3. 200 cm
4. 400 cm

Q43.A geotextile, when placed between a fine soil and a coarse material, performs the function of

1. Reinforcement
2. Drainage
3. Filtration
4. Separation

Q44.The decay in timber due to alternate welting and drying is called

1. Dry rot
2. Wet rot
3. Foxiness
4. Dortiness

Q45.The strain energy stored in a simply supported beam of span, L, and flexural rigidity, EI. due to a central concentrated load, W, is

1. w²L³/48EI
2. w²L²/48EI
3. w²L²/96EI
4. w²L³/96EI

Q46.The mean velocity of flow of air in a ventilating duct of 1 m diameter is 33 m/sec. and the maximum velocity is 20 m/sec. Corresponding Reynold's Number is (asume Kinematic Viscosity for air is 0.165)

1. 2×10⁴
2. 2×10⁶
3. 2×10⁵
4. 2×10³

Q47.The survey in which the curvature of earth is ignored, is called as

1. Plane survey
2. Geodetic survey
3. Geological survey
4. Acrial survey

Q48.An external corner in brick masonry is called

1. Quoin
2. Jamb
3. Squint
4. Closer

Q49.The deformation of a spring produced by a unit load called

1. Stiffness
2. Flexibility
3. Influence coefficient
4. Unit strain

Q50.The frequency for audible sound (in Hz) ranges from

1. 2-2000
2. 1000-10000
3. 16-20000
4. 40-40000

Q51.A pressure increase of 200 N/cm² increases of density of water by 0.1%. The bulk modulus of elasticity of water is

1. 200 GN/m²
2. 20 GN/m²
3. 2 GN/m²
4. 0.2 GN/m²

Q52.The process of putting the plane table into some fixed position so that a line representing a certain direction on the plane is parallel to that direction in the field is known as

1. Orientation
2. Resection
3. Intersection
4. Centering

Q53.Negative slack occurs

1. When latest allowable time is greater than earliest expected time
2. When events stick to their schedule
3. When deficiency of resource exist
4. None of the above

Q54.Bacteria which consume organic matter as a source of carbon and energy are known as

1. Photoautotrophic
2. Photoheterotrophic
3. Chemoheterotrophic
4. Chemoautotrophic

Q55.The inflection point on the recession side of the hydrograph indicates the end of

1. Base flow
2. Direct run off
3. Overland flow
4. Rainfall

Q56.Rainfall mass curve shows the variation of

1. Rainfall intensity with time
2. Rainfall intensity with cumulative rainfall
3. Rainfall excess with time
4. Cumulative rainfall with time

Q57.According to Lacey's theory, the silt supporting eddies are generated from

1. Bottom of channel only
2. Sides of channel only
3. Bottom as well as sides of channel
4. None of the above

Q58.3 'E' important in road safely are

1. Engineering, Enhancement, Education
2. Engineering, Environment, Economy
3. Engineering, Enforcement, Education
4. Engineering, Enforcement, Environment

Q59.For transfer of load from one slab to another at an joint of a rigid pavement the bar used is called

1. Dowel bar
2. Tie bar
3. Hanger bar
4. Distribution bar

Q60.Which of the following bends will cause maximum head loss?

1. 30° bend
2. 60° bend
3. 90° bend
4. U bend

Q61.The angle between the true meridian and the magnetic meridian is known as

1. Dip
2. Magnetic bearing
3. Magnetic declination
4. True bearing

Q62.The specific energy in a channel is defined as

1. The sum of datum head and depth of flow
2. The sum of depth of flow and velocity head
3. The sum of velocity head and datum head
4. The total energy per unit weight reckoned above channel bed as datum

Q63.If the whole circle bearing of a place is 160°12', the quadrantal bearing would be

1. S 19°48'E
2. N 19°48'E
3. S 19°48'W
4. S 19°48'W

Q64.The development of one or more local swelling on the finished plastered surface is called

1. Foaming
2. Swelling
3. Boiling
4. Blistering

Q65.The hydraulic loading in M³/M²/day with recirculation (recirculation ratio, r=0.5) for a trickling filter of 30 M diameter with 2M depth to treat a flow rate of 6000 M³/day will be

1. 6.4
2. 12.75
3. 19.20
4. 25.50

Q66.If x component of the velocity u is (6xy-2x²), then y component of the flow velocity is

1. 6y²-4xy
2. -6xy+2x²
3. 6x²-2xy
4. 4xy-3y²

Q67.A closed contour line with one or more lower value contours inside indicates a

1. Hillock
2. Ridge
3. Cliff
4. Valley

Q68.While submitting a tender the contractor is required to deposit some amount with the department, as guarantee of this tender known as

1. Bank guarantee
2. Earnest money
3. Security deposit
4. Caution money

Q69.Indian standard for acceptable limit of arsenic is

1. 0.01 mg/l
2. 0.05 mg/l
3. 0.005 mg/l
4. 0.001 mg/l

Q70.Theodolite is an instrument used for measuring

1. Horizontal angles only
2. Vertical angles only
3. Both horizontal and vertical angles
4. Horizontal distance

Q71.For rectangular channels with horizontal floor, the length of a jump has been found to vary between

1. 5 to 7 times the height of jump
2. 7-9 times the height of jump
3. 3 to 5 times the height of jump
4. 9-11 times the height of jump

Q72.Road marking with combination of broken and solid lines indicates

1. At any situation lines should not be crossed
2. The lines may be crossed at the discretion of drivers
3. Solid line may be crossed if solid line is nearer to the direction of travel
4. Solid line may be crossed if broken line is nearer to the direction of travel

Q73.Water Bound Macadam derives stability primarily from

1. Aggregate interlocking, particle friction and cohesion
2. The binding power of bituminous material
3. Flexural strength of the surface course
4. Strength of subgrade

Q74.The property of steel is influenced maximum by

1. Iron
2. Manganese
3. Carbon
4. Sulphur

Q75.An equivalent pipe to an existing pipe/pipe network is one, which is

1. Equal in length
2. Equal in weight per unit length
3. Equal in headloss for same flow rate
4. Carries constant flow for any headloss

Q76.Ring and Ball test is performed to determine

1. Softening point of bitumen
2. Ductility of bitumen
3. Density of sand
4. Water content of soil

Q77.The dimension of the coefficient of consolidation is expressed as

1. KN/M²
2. cm/sec
3. cm²/gm
4. cm²/sec

Q78.Most accurate method of finding the average depth of rainfall over an area is

1. Isohyetal method
2. Arithmetic mean method
3. Thieseesn polygon method
4. Any of the above

Q79.For a barrage, exit gardient is independent of

1. Applied head of water
2. Horizontal length of floor
3. Depth of upstream cut off
4. Depth of downstream cut off

Q80.The factors influence value of camber are

1. Type of construction and type of traffic flow
2. Rainfall intensity and construction of road stufacing
3. Temperature intensity and rainfall intensity
4. Functional type of road and type of construction of surfacing

Q81.Pile foundations are normally used

1. In soft clayey soils
2. In heavy-loaded situations
3. In loose sandy soils
4. When required bearing area is not available

Q82.Soils, carried by water and deposited along a stream are termed as

1. Colluvial
2. Marine
3. Alluvial
4. Lacustrine

Q83.Seepage pressure is expressed as

1. KiA
2. iγw
3. δ²φ/δxδz
4. δ²φ/δz²

Q84.Permanent wilting point is

1. A charecteristica of the plant
2. A soil charecteristic
3. A soil characteristic modified by the crop
4. Dependent on soil water plant fertiliser interaction

Q85.A silty soil of high compressibility is represented by

1. ML
2. SM
3. MH
4. CI

Q86.If CBR corresponding to 2.5 mm penetration is lower than that at 5.0 mm penetratiary

1. CBR corresponding to 2.5 mm penetration adopted
2. CBR corresponding to 5.0 mm penetration is adopted
3. Test is repeated
4. Test is discarded

Q87.The water content corresponding to the maximum dry density is called the

1. Degree of compaction
2. Degree of saturation
3. Optimum moisture content
4. Consistency index

Q88.Interception loss is

1. More towards end of a storm
2. Less towards end of a storm
3. More at the beginning of a storm
4. Uniform throughout the storm

Q89.Blue baby disease is caused due to the presence of excess amount of the following pollutant in drinking water

1. Cadmium
2. Chloride
3. Fluride
4. Nitrate

Q90.Flow mass curve is the graph between

1. Flow rate and time
2. Cumulative volume of flow and time
3. Cumulative volume of flow and cumulative time
4. Cumulative discharge and time

Q91.The dimension of the coefficient of permeability is usually expressed as

1. m/day
2. kN/cm²
3. cm²/sec
4. m²/kN

Q92.The differential equation of one dimensional consolidation is given by

1. δu/δx + δv/δy = 0
2. δφ/δz = -K(δh/δz)
3. δu/δt = Cv.δ²u/δz²
4. δh/δt = -λK(h/l)

Q93.For a distribution which is symmetrical about mean the skewness coefficient is

1. Positive
2. Negative
3. Zero
4. Sometime, positive and sometimes negative

Q94.Ratio of volume of water retained by the formation to volume of formation when it is freely drained is known as

1. Specific yeild
2. Specific retention
3. Specific storage
4. Porosity

Q95.In one cubic meter of cement concrete at 1:2:4 to be mixed by volume, the number of cement bags required will be about

1. 1
2. 5
3. 6
4. 11

Q96.If 'i' is the stadia distance, 'f' focal length of the objective and 'd' is the distance from the objective to the vertical axis of the instrument, then the multiplying tacheometric constant will be

1. (i×d)/f
2. (f×i)/d
3. f/(i×d)
4. f/i

Q97.A circular plate of diameter, d is submerged in water vertically, so that the topmost part is just at the water surface. The centre of pressure of the plate will be below the water surface at a depth of

1. 5/8 d
2. 2/3 d
3. 11/16 d
4. 3/4 d

Q98.A transition curve is introduced to gradually change the

1. Direction
2. Super elevation
3. Gradient
4. Camber

Q99.In PERT technique, the critical path has slack equal to

1. Always zero
2. Positive value
3. Negative value
4. Zero or negative value

Q100.It is seen from laboratory results that 10 mg/l of chlorine will be needed for break- point chlorination of a particular water sample. To maintain 0.4 mg/l of free chlorine residual in the disinfected water, the requirement of chlorine (in kg/d) for flow rate of 2.0 MLD is

1. 2.08
2. 20.8
3. 0.208
4. 8.0