WBMSC SAE Civil 2024 (4 August 2024) question paper with answers

Q1.A short masonry pillar is 60 cm x 60 cm in cross-section. The core (kern) of the pillar is a square whose side is

1. 17.32 cm
2. 20.00 cm
3. 14.14 cm
4. 22.36 cm

Q2.The carryover factor in a prismatic member whose far end is fixed is

1. 0
2. 1/2
3. 1/3
4. 1

Q3.An 8 metre long simply supported rectangular beam carries a distributed load 45 kg/m and experiences a maximum fibre stress of 160 kg/cm². If the moment of inertia of the beam is 1125 cm⁴, the overall depth of the beam is

1. 10 cm
2. 12 cm
3. 15 cm
4. 16 cm

Q4.With the rise of temperature, the sensitivity of a bubble tube

1. decreases
2. increases
3. remains unaffected
4. None of these

Q5.The process of turning the telescope about the vertical axis in horizontal plane is known as

1. transiting
2. receiving
3. plunging
4. swinging

Q6.The reduced bearing of a line is N 87° W. Its whole circle bearing is

1. 87°
2. 273°
3. 93°
4. 3°

Q7.ABCD is a rectangular plot of land. If the bearing of the side AB is 75°, the bearing of DC is

1. 75°
2. 255°
3. 105°
4. 285°

Q8.The bearings of two traverse legs AB and BC are N52°45'E and N34°30'E respectively. The deflection angle is

1. 87°15'
2. 55°30'
3. 37°15'
4. 18°15'

Q9.The bearing of AB is 190° and that of CB is 260°30'. The included angle ABC is

1. 80°30'
2. 99°30'
3. 70°30'
4. None of these

Q10.A steel plate is 200 mm wide and 10 mm thick. If the diameter of the bolt hole is 20 mm, the net sectional area of the plate is

1. 27 cm²
2. 20 cm²
3. 22 cm²
4. None of these

Q11.The most fire resistant paints are

1. enamel paints
2. aluminium paints
3. asbestos paints
4. cement paints

Q12.M10 grade of concrete approximates

1. 1:3:6 mix
2. 1:1:2 mix
3. 1:2:4 mix
4. 1:1.5:3 mix

Q13.If a sample of coarse aggregate is sieved through a standard set of sieves, the fineness modulus of the aggregate is approximately

1. 7.30
2. 7.35
3. 7.40
4. 7.45

Q14.A fixture which allows water in a pipe to flow in one direction only is called

1. Sluice valve
2. Scour valve
3. Reflux valve
4. Air relief valve

Q15.In one-pipe system of plumbing, waste water is carried down in the soil pipe from

1. water closets
2. kitchen and bathrooms
3. wash basins and sinks
4. All of these

Q16.The minimum water content at which the soil just begins to crumble when rolled into threads 3 mm in diameter, is known as

1. liquid limit
2. plastic limit
3. shrinkage limit
4. permeability limit

Q17.Degree of saturation of a natural soil deposit having water content 15%, specific gravity 2.50 and void ratio 0.5, is

1. 50%
2. 60%
3. 75%
4. 80%

Q18.A soil has bulk density 2.30 g/cm³ and water content 15 per cent. The dry density of the sample is

1. 1.0 g/cm³
2. 1.5 g/cm³
3. 2.0 g/cm³
4. 2.5 g/cm³

Q19.A coarse-grained soil has a void ratio of 0.75 and specific gravity of 2.75. The critical gradient at which quick sand condition occurs, is

1. 0.25
2. 0.50
3. 0.75
4. 1.00

Q20.For determining the moisture content of a soil sample: weight of container = 260g, weight of soil sample and container = 320g, weight of soil sample (dried) and container = 310g. The moisture content is

1. 15%
2. 18%
3. 20%
4. 25%

Q21.If dry density, water density and specific gravity of solids of a soil sample are 1.6 g/cc, 1.00 g/cc and 2.56 respectively, the porosity of the soil sample is

1. 0.375
2. 0.370
3. 0.380
4. 0.390

Q22.The plasticity index is the numerical difference between

1. liquid limit and plastic limit
2. plastic limit and shrinkage limit
3. liquid limit and shrinkage limit
4. None of these

Q23.The maximum grade compensation for a curve of radius 75 m is

1. 1%
2. 1.4%
3. 1.5%
4. 1.6%

Q24.For a terrain to be termed as steep, the cross slope should be greater than

1. 25%
2. 35%
3. 45%
4. 60%

Q25.Run off is measured in

1. cubic metres
2. cubic metres per second
3. cubic metres per minute
4. cubic metres per hour

Q26.By boiling water, hardness can be removed if it is due to

1. calcium sulphate
2. magnesium sulphate
3. calcium nitrate
4. calcium bicarbonate

Q27.The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is

1. 100 cm
2. 110 cm
3. 120 cm
4. 150 cm

Q28.3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning was 8 mg/l, and after 5-day incubation at 20°C it was 5 mg/l. The BOD of the raw sewage is

1. 100 mg/l
2. 200 mg/l
3. 300 mg/l
4. 400 mg/l

Q29.The moisture content of a sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge is

1. 25%
2. 50%
3. 10%
4. 5%

Q30.If the modulus of elasticity E of a material is twice the modulus of rigidity G, the bulk modulus K will be

1. 2G/3 (approx.)
2. 3G
3. 2G
4. G

Q31.The section modulus of a circular section about an axis through its CG is

1. πD³/4
2. πD³/32
3. πD³/64
4. πD³/16

Q32.In a simply supported beam carrying a uniformly distributed load per unit length, the point of contraflexure

1. lies in the center of the beam
2. lies at the end of the beam
3. depends upon the length of the beam
4. does not exist

Q33.The value of cos 31°/sin 59° is

1. 1
2. 1.74
3. 2.03
4. 0

Q34.The resultant of two equal forces P making an angle θ between them is given by

1. 2P cos(θ/2)
2. 2P sin(θ/2)
3. 2P cosθ
4. 2P cotθ

Q35.When a cantilever beam is loaded with a uniformly distributed load, the bending moment diagram will be a

1. Horizontal straight line
2. Vertical straight line
3. Inclined straight line
4. Parabolic Curve

Q36.The under surface of an arch is called

1. Soffit
2. Springer
3. Haunch
4. Back

Q37.The process of making the background rough, before plastering is

1. Dubbing
2. Hacking
3. Blistering
4. Peeling

Q38.Which of the following is not an endogenous tree?

1. Bamboo tree
2. Teak tree
3. Palm tree
4. Coconut tree

Q39.A temporary rigid structure having platforms to enable masons to work at different stages of a building is known as

1. Scaffolding
2. Dead shore
3. Racking shore
4. Underpinning

Q40.Sandstone is

1. Sedimentary rock
2. Metamorphic rock
3. Igneous rock
4. Volcanic rock

Q41.The smaller horizontal angle between the true meridian and a survey line is known as

1. Declination
2. Bearing
3. Azimuth
4. Dip

Q42.A chord whose length is less than the peg interval is called

1. Short Chord
2. Small Chord
3. Sub Chord
4. Chord

Q43.A total station can measure

1. Distance electronically
2. Horizontal angles accurately
3. Vertical angles and distances
4. Horizontal angles, vertical angles and distance

Q44.To obtain the correct volume using the trapezoidal rule, the prismoidal correction should always be

1. added
2. subtracted
3. multiplied
4. divided

Q45.The clay mineral with the largest swelling and shrinkage characteristics is

1. Kaolinite
2. Illite
3. Montmorillonite
4. None of these

Q46.For better strength and stability, fine-grained soils and coarse-grained soils are compacted respectively as

1. dry of OMC and wet of OMC
2. wet of OMC and dry of OMC
3. wet of OMC and wet of OMC
4. dry of OMC and dry of OMC

Q47.In which system are both soil pipe and waste pipe separately ventilated by a vent pipe?

1. Single stack system
2. One pipe system
3. Two pipe system
4. All of these

Q48.Which of the following is not a water borne disease?

1. Dysentery
2. Cholera
3. Typhoid
4. Malaria

Q49.The 'safe water' does not contain any

1. colour
2. taste
3. pathogen
4. odour

Q50.The gradual reduction in value with age of a property is known as

1. Devaluation
2. Revaluation
3. Depreciation
4. Appreciation

Q51.The separation of water in the fresh concrete is called

1. Curing
2. Bleeding
3. Segregation
4. Hydration

Q52.The approximate ratio of concrete strength at 7 days to its strength at 28 days is about

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

Q53.Los Angeles testing machine is used to conduct

1. Abrasion test
2. Impact test
3. Attrition test
4. Crushing strength test

Q54.Broad gauge width in India is

1. 1.7666 m
2. 1.676 m
3. 2.676 m
4. 2.766 m

Q55.When the velocity of flowing water causes no silting or scouring in a channel it is known as

1. Critical velocity
2. Average velocity
3. Optimum velocity
4. None of these

Q56.Water flows with a free surface in case of

1. open channel flow
2. pressure flow through pipe
3. flow in confined aquifer
4. None of these

Q57.The representative fraction 1/5000 means that the scale is 1 cm equal to

1. 0.5 m
2. 5 m
3. 5 km
4. 50 m

Q58.The length visible to a driver at any instance is called the

1. Visibility limit
2. Head light distance
3. Sight distance
4. None of these

Q59.In survey work, which chain is used for land measurement with a length of 66 ft?

1. Metric chain
2. Engineer's chain
3. Gunter's chain
4. Revenue chain

Q60.The compound of Portland cement which reacts immediately with water and sets first is

1. Tricalcium silicate
2. Dicalcium silicate
3. Tricalcium aluminate
4. Tetra-calcium alumino-ferrite

Q61.Soundness of cement is tested by

1. Vicat's apparatus
2. Le Chatelier apparatus
3. Compressive testing machine
4. None of these

Q62.PVC stands for

1. plastic very compact
2. polyvinyl chloride
3. polyvinyl carbon
4. None of these

Q63.Pile foundation is generally provided if soil is

1. compressible
2. water logged
3. made up (fill)
4. All of these

Q64.The brick laid with its length parallel to the face of a wall is known as

1. header
2. stretcher
3. closer
4. None of these

Q65.In which of the following cases is compass surveying recommended?

1. When area is small, undulating and no details are crowded
2. When area is large, undulating and crowded with many details
3. When area is small, even and crowded with many details
4. When area is large, even and crowded with many details

Q66.Which of the following is not a method of plane table surveying?

1. Trisection
2. Intersection
3. Resection
4. Radiation

Q67.Seepage through the foundation of an earthen dam is controlled by providing

1. impervious cut-off
2. chimney drain
3. rock toe
4. horizontal blanket

Q68.A rain-gauge should preferably be fixed

1. under the tree
2. in an open space
3. in a closed space
4. near the building

Q69.The main reinforcement of a RCC slab consists of 10 mm diameter bar @ 10 cm spacing. If the 10 mm bar is replaced by a 12 mm bar, what will be the new spacing?

1. 10 cm
2. 12 cm
3. 14.40 cm
4. 16 cm

Q70.As per IS 456-2000, the maximum area of tensile reinforcement of a beam shall not exceed

1. 0.15%
2. 6%
3. 4%
4. None of these

Q71.The value of maximum shear stress of a rectangular beam is

1. 1.25 of average shear stress
2. 1.50 of average shear stress
3. 1.75 of average shear stress
4. 2.00 of average shear stress

Q72.The value of toughness index less than unity indicates that the soil can be easily crushed at the

1. elastic limit
2. liquid limit
3. composite limit
4. plastic limit

Q73.Degree of consolidation is

1. directly proportional to time and inversely proportional to the square of drainage path
2. directly proportional to time and inversely proportional to the drainage path
3. directly proportional to drainage path and inversely proportional to the time
4. directly proportional to square of drainage path and inversely proportional to time

Q74.The average co-efficient of permeability of a natural deposit

1. parallel to stratification may or may not be greater than perpendicular to stratification
2. is always same for both directions
3. parallel to stratification is always greater than perpendicular to stratification
4. parallel to stratification is always less than perpendicular to stratification

Q75.If the water content of a fully saturated soil mass is 100%, the void ratio of that sample is

1. less than specific gravity of soil
2. equal to specific gravity of soil
3. more than specific gravity of soil
4. independent of specific gravity of soil

Q76.The camber required depends upon

1. rainfall characteristics
2. type of pavement
3. rainfall
4. both type of pavement and rainfall

Q77.In traffic engineering, a median is termed as a

1. traffic separator
2. traffic junction
3. traffic check-post
4. traffic flow

Q78.Kinematic viscosity is defined as equal to

1. dynamic viscosity × density
2. dynamic viscosity / density
3. dynamic viscosity × pressure
4. density × pressure

Q79.The resultant hydrostatic force acts through the point known as

1. centre of gravity
2. centre of buoyancy
3. centre of pressure
4. None of these

Q80.Bernoulli's theorem deals with the law of conservation of

1. mass
2. energy
3. momentum
4. None of these

Q81.Which type of ranging is done if both ends of a surveying line are visible?

1. Indirect
2. Reciprocal
3. Unable to do
4. Direct

Q82.The angle of intersection of the two plane mirrors of an optical square is

1. 30°
2. 45°
3. 60°
4. 90°

Q83.The correction due to sag in chain surveying is

1. always zero
2. always additive
3. always subtractive
4. sometimes additive and sometimes subtractive

Q84.The cross hairs of a surveying telescope are placed

1. midway between object glass and eye piece
2. much closer to object glass than eye piece
3. much closer to eye piece than object glass
4. anywhere between eye piece and object glass

Q85.If RL of a Bench Mark is 100.000 m, the back sight reading is 1.265 m and the fore sight reading is 1.955 m, the RL of the forward point is

1. 100.69 m
2. 99.31 m
3. 99.69 m
4. 100.31 m

Q86.A series of closely spaced contour lines represents a

1. Plane surface
2. Gentle slope
3. Uniform slope
4. Steep slope

Q87.The centre of gravity of a hemisphere of radius R, from the base measured along the vertical radius, is at a distance of

1. R/2
2. 3R/8
3. 3R/4
4. 5R/8

Q88.The moment of inertia of a triangular section (base b, height h) about a centroidal axis parallel to the base, is

1. bh³/12
2. bh³/3
3. bh³/36
4. bh³/8

Q89.The path traced by a projectile in the sky is

1. circular
2. elliptical
3. catenary
4. parabolic

Q90.If the width of a simply supported beam carrying a point load at its centre is doubled, its deflection at the centre changes by a factor of

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

Q91.A three-hinged arch is said to be a

1. statically indeterminate structure
2. a bent beam
3. statically determinate structure
4. None of these

Q92.In Chezy's formula V = C√(RS) for calculating the velocity of flow in a circular sewer of diameter D running full, the value of the hydraulic mean radius is

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

Q93.The void ratio of a soil is defined as the ratio of

1. weight of water to weight of soil
2. volume of water to volume of voids in the soil mass
3. total volume of voids to volume of soil solids
4. total volume of voids to total volume of soil

Q94.The secondary treatment of sewage is caused by

1. bacteria
2. algae
3. virus
4. coagulants

Q95.The multiplying factor applied to the average per-capita daily demand to obtain the maximum daily water demand is

1. 1.5
2. 1.8
3. 2
4. 2.7

Q96.Sewers are generally laid starting from their

1. off-take point
2. outfall point
3. mid-point
4. any point along the alignment

Q97.In the very first stage of decomposition of organic matter in sewage

1. nitrites are formed
2. nitrates are formed
3. carbon dioxide is formed
4. ammonia is formed

Q98.The gas which may cause explosion in a sewer is

1. carbon dioxide
2. methane
3. ammonia
4. carbon monoxide

Q99.The maximum energy that a given component can absorb without undergoing any permanent deformation, up to the elastic limit, is known as

1. proof resilience
2. resilience
3. hardness
4. toughness

Q100.A stone piece projecting beyond the wall, provided to support a structural member, is called

1. Cornice
2. Topping
3. Corbel
4. Throating