WBPSC AE Civil 2007 question paper with answers

Q1.The critical load for long columns can be calculated for one end fixed and other hinged condition as per Euler's formula

1. π²EI/L²
2. 2π²EI/L²
3. 4π²EI/L²
4. π²EI/4L²

Q2.The variation of the horizontal shear stress in the flange of an I section is

1. Lunear
2. Parabola
3. Elliptical
4. Cubic Parabola

Q3.The normal strain in axial direction is 1.25 mm/m due to application of an axial tensile force. If Poisson's ratio is 0.3, the volumetric strain in the body will be

1. 4×10⁻⁴
2. 3.4×10⁻⁴
3. 1.7×10⁻⁴
4. 2×10⁻⁴

Q4.In elasticity

1. both stress and strain are equally important
2. strain is more fundamental
3. stress is more fundamental
4. yield stress is fundamental

Q5.Sagging moment may develop at support of a continous beam if

1. rotation occurs
2. lateral load acts
3. yielding of support
4. all of the above

Q6.For unstiffened web, the slenderness ratio adopted to check web bucking is

1. h1/tu
2. (h1√3)/tu
3. (tw√2)/h1
4. (h1√2)/tw

Q7.The permissible stress for crippling of a steel beam is equal to

1. 0.75 fy
2. 0.66 fy
3. 0.8 fy
4. 0.6 fy

Q8.Development length of bars of dia φ as per IS code

1. φσst/(3τbd)
2. 2φσst/(3τbd)
3. 4φσst/(τbd)
4. φσst/(4τbd)

Q9.As per IS:800, bending moment for design of purlins can be taken as

1. WL/10
2. WL/15
3. WL/8
4. WL/12

Q10.The maximum economical spacing of trusses is recommended as

1. L/5
2. 2L/5
3. L/3
4. 3L/5

Q11.In reinforced concete footing on soil, the minimum thickness at edge of the footing should not be less than

1. 200 mm
2. 150 mm
3. 225 mm
4. 100 mm

Q12.The maximum percentage of reinforcement in long RCC columns is about

1. 0.8
2. 4.0
3. 6.0
4. 8.0

Q13.The ratio of the allowable stress in bending to that in direct compession in masonry is

1. 1.33
2. 1.25
3. 1.50
4. 2.00

Q14.If N is the modulus of rigidity and q is the intensity of shear stress, the strain energy due to shear is given by

1. 0.5Nq² × volume
2. N²q × volume
3. N²q × volume
4. 0.5Nq × volume

Q15.When a body is subjected to a direct tensile stress (p) in one plane, then shear stress on an oblique section of the body inclined at an angle θ to be normal of the section is

1. p sin2θ
2. p cos2θ
3. p tan2
4. (p/2) sin2θ

Q16.A thin circular plate of radius r and thickness t is subnected to radial stress σ throughout its circumference. The unit volume change of the entire plate is

1. (σ/E)(1-μ)
2. (2σ/E)(1-μ)
3. (σ/E)(1-2μ)
4. (2σ/E)(1-2μ)

Q17.When modlus of righidity is equal to the bulk modulus the Poisson's ratio will be

1. 1/8
2. 1/4
3. 1/2
4. 1

Q18.A point subjected to a number of forces will be in equilibrium if

1. sum of the resoloved parts in any two directions at right angles are both zero
2. the algebraic sum of the forces is zero
3. two resolved parts in any two directions at right angles are equal
4. the algebraic sum of the moments of the force about the point is zero

Q19.Two perfectly elastic spheres of equal masses moving in the same direction with their velocities in the ration 2:1 have an impact. After the impact, they will

1. move in the same direction with the same velocity ratio
2. have a velocity ratio of 1:2
3. move in opposite directions with a velocity ratio of 1:2
4. move in the same direction with a velocity ratio of 1:2

Q20.Two simply supported beams B1 and B2 have spans l and 2l respectively. Beam B1 has a corsssection of 1×1 units and beam B2 has a cross-section of 2×2 units. These beams are subjected to concentrated load W at the centre of their span. The ratio of the maximum flexural stress in these beams is

1. 4
2. 2
3. 1/2
4. 1/4

Q21.A load 'W' is moving form left to right support on a simply supported beam of span 'L'. The maximum bending moment at 0.4L from the left support is

1. 0.16 WL
2. 0.20 WL
3. 0.24 WL
4. 0.25 WL

Q22.Torsion resisting capacity of a given reinforced concrete section

1. decreases with decrease in stirrup spcacing
2. decreases with increase in longitudianl bars
3. does not depend upon stirrup and longitudinal steels
4. increases with the increase in stirrup and longitudinal steel

Q23.The lateral ties in a reinforced concrete rectangular column under axial compression are used to

1. avoid the buckling of the longitudianl steel under compression
2. provide adequate shear capacity
3. provide adeuqate confinement to concreate
4. reduce the axial deformation of the column

Q24.Ties are load carrying members of a frame which are subjected to

1. transverse loads
2. axial tension loads
3. axial compressive loads
4. torsional loads

Q25.In a structure under fatigue stresses, the welded joints as compared to rivetted joints will fail

1. earlier
2. later
3. at the same time
4. not at all

Q26.When metacentre of a floating body is lower that the centre of gravity, then the body will be in

1. unstable equilibrium
2. stable equilibrium
3. neutral equilibrium
4. any of the above depending on other factors

Q27.If the discharge Q in a pipe fitted with an endcap nozzle discharging a jet of water with velocity v and hitting normally a plate which is moving with a velocity v/2 towards the nozzle, the jet would hit the plate with a discharge.

1. 0.5 Q
2. Q
3. 1.5 Q
4. 2 Q

Q28.Two pipe systems in series is said to be equivalent when

1. the average diameter in both the systems is same
2. the average friction factor in both the sysems is same
3. the total length of the pipes is the same in both the systems
4. the discharge for same head is same in both the systems

Q29.If the area of cross-section of an open channel remains constant the discharge will be maximum only wen

1. pressure head will be maximum
2. velocity of flow will be maximum
3. frictional loss will be maximum
4. bed slope will be maximum

Q30.The tangential force exerted by the shearing stresses on an object submerged in a fluid is known as

1. pressure drag
2. surface drag
3. drag
4. lift

Q31.The dimension of dynamic viscosity is

1. MLT⁻¹
2. ML⁻¹T⁻²
3. ML²T⁻²¹
4. MLT⁻²

Q32.A rectangular channel carries 6.0 m³/sec flow of water. The critical velocity (Vc) in m/sec for a width of 3 m will be

1. 2.45
2. 0.245
3. 2.68
4. 0.612

Q33.Discharge over a rectangular notch or weir is given by the equation

1. 0.67 Cd√(2g) h^(3/2)
2. 0.75 Cd L√(2g) h^(3/2)
3. 0.67 Cd L√(2g) h^(3/2)
4. 0.75 Cd L√(2g) h^(3/2)

Q34.The closure of a valve is said to be instantaneous when time of closure (t) is

1. < L/C
2. < 2L/C
3. > 2L/C
4. > L/C

Q35.In the generalised equation of Bernoulli's equation, each of the term represents

1. energy per unit mass
2. energy per unit weight
3. energy per unit depth
4. energy per unit volume

Q36.A soil has natural Moisture Content (MC) and atterg's limits are as follows, LL 60%, PL 30%, NMC 50%, the liquidity index of the soil is

1. 0.67
2. 0.21
3. 0.41
4. 0.90

Q37.The capacity of a group of piles driven in clay is

1. equal to single pile capacity
2. less than that of pile capacity
3. greater than that of pile capacity
4. multiplied by number of piles

Q38.An earthen embankment is compacted at water content of 17% to a bulk density of 1.90 gm/cc. If the void ratio (e) is 0.63 and the sp. gr. of soil is 2.65, then degree of saturation of the compacted embankment will be

1. 0.72
2. 0.64
3. 0.80
4. 0.68

Q39.Cohesion

1. Increases active pressure and decreases passive pressure
2. decreases both active and passive pressure
3. increases both active and passive pressure
4. decreases active pressure and increases passive pressure

Q40.The net ultimate bearing capacity of a strip footing resting on clay compared to a suqare footing of same size is

1. more
2. less
3. equal
4. cannot be predicted

Q41.A plate load test is useful to estimate

1. bearing capacity
2. settlement
3. pressure only
4. both (a) and (b) above

Q42.Under load the void ratio of a submerged saturated clay decreases from 1.00 to 0.92. What will be the ultimate settlement of the 2 m thick clay due to consolidation?

1. 29 mm
2. 40 mm
3. 80 mm
4. 160 mm

Q43.Which one of the following relations is not correct?

1. e = n/(1-n)
2. γsat = ((G+e)/(1+e))γw
3. n = e/(1-e)
4. e = WG/S

Q44.Permeability of soil varies

1. inversely as square of grain size
2. inversely as grain of grain size
3. as grain size
4. as square of grain size

Q45.Comparatively sudden reduction in volume of a soil mass under an applied load is called

1. primary compression
2. initial consolidation
3. primary time effect
4. secondary compression

Q46.The principle of working of an optical square is based on

1. refraction
2. reflection
3. double refraction
4. double reflection

Q47.When the area to be surveyed is large having undulating grounds and higher accuracy is not required, then the best method suitable for surveying will be

1. chain survey
2. compass survey
3. plane table survey
4. theodolite survey

Q48.The angle between the true meridian and the magnetic meridian at the time of observations is known as

1. dip
2. bearing angle
3. magnetic bearing
4. magnetic declination

Q49.During levelling, the following readings were obtained: R.L. of a point on floor = +10.000 M. Reading of a staff on this floor = +1.505 m its bottom touching the beneath of a girder = -2.495 m RL of the bottom of the girder

1. 4.000 m
2. 10.990 m
3. 9.101 m
4. 14.000 m

Q50.If the cross-sectional areas of an embankment at 30 m intervals are 20, 40, 60, 50 and 30 sq. m respectively, the volume of the embankment of the basis of preismoidal rule is

1. 5300 m³
2. 8300 m³
3. 9300 m³
4. 10300 m³

Q51.If the quadrantal bearing is N 25° W, then W.C.B. of the line is

1. 335°
2. 295°
3. 205°
4. 155°

Q52.The reading taken on a staff 100 m from the instrument with the bubble central was 1.872 m. The bubble is then moved 5 divisions out of the centre and the staff reading is observed to be 1.906 m. The sensitivity of the bubble tube will be

1. 30 sec
2. 14 sec
3. 22 sec
4. 28 sec

Q53.The length of the long chord of a simple circular curve of radius R and angle of deflection φ is

1. R cosφ
2. 2R sin(φ/2)
3. R sinφ
4. 3R cos(φ/2)

Q54.In a contour map, the contour lines

1. can touch and cross each other
2. can touch each other but cannot corss each other
3. cannot touch and cross each other
4. never intersect

Q55.For a well conditioned traingle in triangulation surveying no angle should be less than

1. 25°
2. 30°
3. 45°
4. 60°

Q56.Excess vibration of a green concrete leads to

1. honey combing
2. bleeding
3. segreation
4. cracking

Q57.In stoneware pipe glazing is made for

1. softening
2. waterproofing
3. hardening
4. none of the above

Q58.Quartzite is a

1. silicious rock
2. argillaceous rock
3. calcareous rock
4. aqueous rock

Q59.Slack time in PERT analysis for critical activities equal to

1. zero
2. constant
3. negative
4. positive

Q60.Le Chatelier's device is used for determining the

1. soundness
2. setting time
3. compressive strength
4. fineness

Q61.Clamshell is used for

1. vertical excavation
2. rock drilling
3. pressure grouting
4. trench construction

Q62.The minimum number of days after which the form work including props under the soffits of the beams can be removed is

1. 14
2. 10
3. 7
4. 21

Q63.Stainless steel resists corrosion due to a

1. carbon
2. manganese
3. chromium
4. sulphur

Q64.A soft negative growth that forms in wood under damp condition in called

1. rot
2. mould
3. knot
4. checks

Q65.Generally the unit of measurement ofr partition wall is

1. volume
2. area
3. length
4. number

Q66.Sinking fund is

1. fund required for sinking of well
2. fund required for mainenance work
3. fund required to take care depreciation of property
4. fund set aside from income to built up the property at the end of its life

Q67.The additional pile driven to incease the capacity of supporting loads on vertical piles is known as

1. sinking pile
2. raymond pile
3. eccentric pile
4. simplex pile

Q68.During the construction period, price variation clause in contracts cater to

1. variation in cost of materials and labour elements
2. rate of inflation
3. variation in total cost of the project on an ad hoc basis
4. increase in rates of only important materials

Q69.A dummy activity

1. had no tail event but had only a head event
2. had only a head event but no tail event
3. does not require any resources nor any time
4. had no sequence and can be fitted anywhere

Q70.Gnatt chart is drawn for

1. time versus activity
2. time versus progress
3. resources versus progress
4. progress versus time

Q71.When drainage is the main concern, the attainment of superelevation may be made by rotating the pavement with respect to

1. outer edge
2. inner edge
3. centre line
4. any point

Q72.Prime coat is provided to promote adhesion between

1. subgrade and base
2. granular course and bituminous course
3. binder course and wearing course
4. existing and new wearing courses

Q73.One of the major causes of rutting on flexible pavement is

1. excessive stripping of binder material from wearing course
2. use of flaky aggregates in the wearing course
3. inadequate compaction of pavement layers
4. high wind speed

Q74.In Marshall method of bituminous mix design the bitumen content is determined as the average of bitumen corresponding to

1. maximum stability, desirable air void
2. maximum stability, maximum unit weight and minimum flow
3. maximum stability, minimum flow and maximum air void
4. maximum unit weight, desirable air void and maximum unit weight, desirable air void and minimum flow

Q75.Which one of the following cracking failure is not generally obseived in flexible pavement?

1. Wraping
2. Longitudinal
3. Map
4. Reflection

Q76.The safe stopping sight distance in 'm' according to IRC recommendation for a design speed of 60 km/h is

1. 45
2. 80
3. 35
4. 60

Q77.The maximum limit of water absorption for aggregate suitable for road construction is

1. 0.4%
2. 1%
3. 4%
4. 0.6%

Q78.The amount of equilibrium superelevation should be equal to

1. V²/75R
2. V²/127R
3. V²/27.5R
4. 75V²/R

Q79.In case of plain terrain, the rulling gradient should be steeper than

1. 1 in 16
2. 1 in 20
3. 1 in 30
4. 1 in 25

Q80.The total rainfall in a catchment of area 1200 km² during a 6 h storm is 160 mm. The infilitration index (φ) due to storm runoff 1.2×10¹⁴ cm³ is

1. 1 cm/h
2. 0.10 cm/h
3. 10 cm/h
4. 0.01 cm/h

Q81.In Francis equation for necessary correction for end contraction for calculation of discharge capacity of the spillway of a dam, "n" represents

1. No. of piers
2. No. of deflecting corners
3. No. of opening in the spillway
4. No. of gates

Q82.As per Lacey's regime theory, the flow velocity is proportional to

1. (q/f²)^(1/3)
2. q/f²
3. (qf²)^(1/3)
4. (qf²)^(1/6)

Q83.If duty of water requires for a crop is 1000 ha/m³-sec and a base period of 100 days the total depth of water for crops will be nearly

1. 175 cm
2. 115 cm
3. 90 cm
4. 200 cm

Q84.In a gravity dam, total force due to wave pressure (hw) above the still water acts at a height of

1. 0.375 hw
2. 0.50 hw
3. 0.92 hw
4. 0.66 hw

Q85.An aquifer that is confined at the bottom but not at the top is known as

1. partially confined aquifer
2. unconfined aquifer
3. semiconfined aquifer
4. aquiclude

Q86.Interception loss is

1. more at the start of a storm
2. more at the end of a storm
3. uniform throught the storm
4. random nature throughout the storm

Q87.When a river starts meandering, the sediment carrying capacity

1. first decreases and ultimately increases
2. first increases and ultimately decreases
3. remains unaffected
4. changes erratically

Q88.Storage of water by impounding is required where

1. plenty of water is available in the stream in all seasons
2. excess of suspended and dissolved matter are present in the water
3. there is large variation in quantity of the river flow from time to time
4. the water availability is insufficient

Q89.Draw down or depression head related to pumping in a well is

1. difference between the water level in the well after pumping and the level of unaffected water table
2. difference of water level before and after pumping
3. the depth of water level below ground level after pumping
4. defference between the level of water before pumping and the height of water lifted

Q90.Biochemical oxygen demand of wastewate is a measure of

1. total concentration of biochemical
2. total concentration of organic matter
3. concentration of boidegradebel organic matter
4. concentration of chemically oxidisable matter

Q91.The growth of algae is useful in

1. sedimentation tank
2. slow sand filter
3. oxidation pond
4. sludge diagestion tank

Q92.A certain amount of sewage when allowed to settle it gives 28 cm³ of sludge. If the dry weight of this sludge is 4.0 gm, what will be the sludge index?

1. 3.5
2. 7
3. 32
4. 49

Q93.Bacteria coli are haarmless organism but there presence in water indicates the

1. presence of non-pathogenic bacteira
2. absence of non-pathogenic bacteria
3. presence of pathogenic bacteria
4. absence of pathogenic bacteria

Q94.In general pH value of fresh sewage remains

1. less than 1
2. more than 14
3. between 1 and 7
4. between 7 and 14

Q95.If the chlorine demand of a water sample is found to be 0.2 mg/lit and the smaple of bleaching powder contain 30% chlorine what will be the amount of such bleaching powder needed to treat 1 litre of water?

1. 0.14 mg
2. 0.06 mg
3. 0.133 mg
4. 0.67 mg

Q96.Break-point chlorination of water involves addition of chlorine in and amount sufficient to

1. kill Giardia cysts
2. react with any ammonia and readily oxidisable organicmatter
3. reduce bacterial growth
4. react witj inorganic matter

Q97.Polyelectrolytes are usually

1. cationic
2. non-ionic
3. anionic
4. high molecular weight

Q98.The average time required for a batch of water to pass through the setting basin is known as

1. flow through time
2. batch time
3. detention period
4. mean residence time

Q99.Imhoff coc is employed to determine

1. suspended solids
2. volatitle solids
3. settleable solide
4. filterable solids