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MCQ தேர்வு
Q1
The primary purpose of providing a drainage filter in an earth dam is to:
A
Increase seepage
B
Prevent migration of soil particles while permitting drainage
C
Increase pore pressure
D
Reduce dam height
Q2
The factor of safety against sliding of a gravity retaining wall is primarily governed by the ratio of:
A
Resisting horizontal forces to driving horizontal forces
B
Vertical force to wall height
C
Moment to area
D
Weight to density only
Q3
For gradually varied flow in an open channel, the governing differential equation is known as:
A
Bernoulli equation
B
Darcy equation
C
Dynamic equation of gradually varied flow
D
Navier-Stokes equation only
Q4
A saturated clay layer undergoes one-dimensional consolidation. Immediately after application of a sudden load, most of the additional stress is initially carried by:
A
Solid soil particles
B
Pore water
C
Air voids
D
Organic matter
Q5
For a homogeneous earth dam, the phreatic line is significant because it approximately represents:
A
The maximum dry density line
B
The seepage free surface
C
The line of maximum compaction
D
The shear plane in the dam
Q6
In construction estimation, the centre-line method is particularly convenient when:
A
The walls have uniform cross-sections and symmetrical junctions
B
Every wall has a different thickness
C
No dimensions are available
D
Only earthwork is involved
Q7
In a simply supported beam carrying a uniformly distributed load over the entire span, the maximum bending moment occurs:
A
At either support
B
At the quarter point
C
At the center of the span
D
At one-third of the span
Q8
According to Rankine theory, the critical load for a column is obtained by considering:
A
Only crushing failure
B
Only Euler buckling failure
C
Combined effects of crushing and buckling
D
Only shear failure
Q9
For a cohesionless soil, the critical hydraulic gradient is primarily dependent on:
A
Specific gravity and void ratio
B
Cohesion only
C
Plasticity index
D
Liquid limit only
Q10
In foundation engineering, the ultimate bearing capacity of a shallow foundation is strongly influenced by:
A
Soil shear strength and foundation geometry
B
Paint thickness
C
Atmospheric humidity only
D
Concrete color
Q11
In a contour map, when contour lines are very closely spaced, the terrain represents:
A
Gentle slope
B
Steep slope
C
Flat terrain
D
A depression necessarily
Q12
For a saturated clay under undrained loading, the short-term shear strength analysis is commonly performed using:
A
Effective stress parameters only
B
Total stress analysis
C
Zero stress analysis
D
Elastic modulus only
Q13
In the rise-and-fall method of levelling, the arithmetic check is:
A
ΣBS + ΣFS = ΣRise + ΣFall
B
ΣBS - ΣFS = ΣRise - ΣFall = Last RL - First RL
C
ΣBS = ΣFS always
D
ΣRise = ΣFall always
Q14
The sludge volume index (SVI) is primarily an indicator of:
A
Sludge settling characteristics
B
Chlorine concentration
C
Influent pH
D
Pipe roughness
Q15
In a soil compaction curve, the optimum moisture content corresponds approximately to:
A
Maximum dry density for a given compactive effort
B
Minimum dry density
C
Zero air voids at all moisture contents
D
Maximum water content
Q16
In a constant-head permeability test, the coefficient of permeability is determined primarily by measuring:
A
Only the soil mass
B
Discharge, hydraulic gradient, specimen length and cross-sectional area
C
Only the water temperature
D
Only the specimen diameter
Q17
The major difference between BOD and COD is that COD:
A
Measures only biodegradable organics
B
Uses a chemical oxidant and is generally completed much faster
C
Requires only sunlight
D
Is always lower than BOD
Q18
In surveying, the fundamental principle of levelling is based on determining:
A
Horizontal angles
B
Difference in elevation between points
C
Magnetic bearing
D
Horizontal distance only
Q19
The hydraulic gradient at which quicksand condition develops in a cohesionless soil is called:
A
Critical hydraulic gradient
B
Seepage gradient
C
Exit gradient
D
Pressure gradient
Q20
In prestressed concrete, the principal purpose of prestressing is to:
A
Introduce tensile stress into concrete
B
Introduce beneficial compressive stresses to counteract tensile stresses from service loads
C
Eliminate dead load completely
D
Reduce concrete density
Q21
In Marshall mix design of bituminous concrete, the optimum binder content is normally selected considering:
A
Only maximum stability
B
Only minimum flow
C
Stability, flow, air voids and other volumetric requirements
D
Only aggregate impact value
Q22
The Hazen-Williams equation is commonly used in water-supply engineering to estimate:
A
Open-channel critical depth
B
Head loss due to friction in water pipes
C
Water quality index
D
Pump efficiency directly
Q23
In a closed traverse, the angular misclosure is primarily distributed using Bowditch rule when:
A
Linear measurements are absent
B
Both angular and linear measurements have comparable precision
C
Only angles are measured
D
Only elevations are measured
Q24
In a continuous reinforced concrete beam, redistribution of moments is possible primarily because:
A
Concrete is perfectly elastic
B
The structure possesses adequate rotational ductility
C
Loads disappear after cracking
D
Shear strength becomes infinite
Q25
According to Rankine earth pressure theory, the active earth pressure coefficient for level backfill is:
A
(1 + sin φ)/(1 - sin φ)
B
(1 - sin φ)/(1 + sin φ)
C
tan²φ
D
1 + tan φ
Q26
For a vertical curve in highway design, the most critical criterion for a summit curve is generally:
A
Drainage
B
Headlight sight distance
C
Overtaking and stopping sight distance
D
Pavement temperature
Q27
In a prestressed concrete beam, excessive loss of prestress due to creep of concrete occurs because:
A
Concrete strain increases with time under sustained stress
B
Steel becomes completely elastic
C
Concrete gains no strength
D
External load becomes zero
Q28
In the activated sludge process, the return activated sludge is primarily used to:
A
Increase influent temperature
B
Maintain an adequate concentration of microorganisms in the aeration tank
C
Remove grit mechanically
D
Increase chlorine demand
Q29
For a normally consolidated clay, the coefficient of earth pressure at rest is approximately given by:
A
K0 = 1 + sin φ
B
K0 = 1 - sin φ
C
K0 = tan φ
D
K0 = sin φ
Q30
In reinforced concrete design, the limiting neutral axis depth is primarily related to:
A
Limiting strain conditions in concrete and steel
B
Concrete color
C
Aggregate shape only
D
Beam span alone
Q31
The zero-air-voids line on a soil compaction graph represents:
A
Complete saturation of the soil
B
Zero water content
C
Maximum permeability
D
Zero density
Q32
In construction project scheduling, the critical path is defined as the sequence of activities that:
A
Has the highest direct cost
B
Has zero or minimum total float and determines project duration
C
Always contains the largest number of activities
D
Has the lowest resource requirement
Q33
A hydraulic jump is classified as an energy-dissipating phenomenon because:
A
Velocity increases and energy increases
B
Specific energy decreases due to turbulence
C
Depth remains constant
D
Pressure becomes zero
Q34
The breakpoint chlorination phenomenon occurs when:
A
Chlorine demand is completely absent
B
Added chlorine first forms and then destroys combined chlorine residuals, after which free residual chlorine appears
C
All chlorine is immediately consumed by sunlight
D
Water becomes completely chlorine-free
Q35
In a water distribution network, the Hardy Cross method is fundamentally based on satisfying:
A
Only continuity at nodes
B
Only energy equation in reservoirs
C
Continuity and energy correction around loops
D
Only Bernoulli equation at pumps
Q36
Which failure criterion is most commonly associated with shear strength of soils in classical geotechnical engineering?
A
Mohr-Coulomb criterion
B
Hooke's law only
C
Bernoulli criterion
D
Fourier criterion
Q37
In conventional water treatment, coagulation is primarily intended to:
A
Kill all microorganisms
B
Destabilize colloidal particles
C
Remove hardness completely
D
Increase dissolved oxygen
Q38
The Los Angeles abrasion test is primarily used to determine the:
A
Soundness of cement
B
Resistance of aggregate to abrasion and impact
C
Water absorption of bitumen
D
Plasticity of soil
Q39
Immediate settlement of a saturated clay immediately after loading is primarily associated with:
A
Expulsion of water from all pores
B
Elastic distortion of the soil mass without significant drainage
C
Secondary consolidation only
D
Chemical weathering
Q40
In total station surveying, the electronic distance measurement system commonly determines distance using:
A
Only mechanical chains
B
Electromagnetic waves
C
Gravitational acceleration
D
Water pressure
Q41
Terzaghi's bearing capacity equation for a strip footing includes terms associated with:
A
Cohesion, surcharge and soil unit weight
B
Only cohesion
C
Only groundwater pressure
D
Only foundation settlement
Q42
The main function of a service reservoir in a water-supply system is to:
A
Increase water hardness
B
Balance fluctuations between supply and demand
C
Remove all dissolved salts
D
Generate electricity only
Q43
In a reinforced concrete beam, the neutral axis depth increases when the percentage of tension reinforcement is increased because:
A
The compressive resultant decreases
B
The tensile force capacity increases, requiring a larger compression block
C
The concrete tensile strength increases
D
The effective depth decreases automatically
Q44
The Reynolds number in open-channel flow is primarily used to characterize:
A
Compressibility
B
Flow regime based on viscous and inertial effects
C
Channel slope only
D
Specific energy only
Q45
For a homogeneous isotropic beam subjected to pure bending, which condition is essential for the classical Euler-Bernoulli bending theory to remain valid?
A
Plane sections remain plane after bending
B
Shear deformation must dominate
C
The beam must have a circular cross-section
D
The material must be perfectly plastic
Q46
In a triaxial compression test under consolidated-drained conditions, the pore-water pressure during shearing is generally:
A
Always zero
B
Not allowed to dissipate
C
Allowed to dissipate continuously
D
Equal to the total confining pressure
Q47
In soil mechanics, the effective stress principle is correctly expressed as:
A
σ = σ' + u
B
σ' = σ + u
C
σ' = σ - u
D
u = σ + σ'
Q48
In CPM network analysis, if an activity has an early start of 12 days and a latest start of 17 days, its total float is:
A
3 days
B
5 days
C
7 days
D
29 days
Q49
The effective length factor of a column depends primarily on:
A
Column color
B
End restraint conditions
C
Concrete grade only
D
Cross-sectional area alone
Q50
For a hydraulic jump in a rectangular channel, the relationship between upstream and downstream depths is governed by:
A
Darcy-Weisbach equation
B
Momentum equation
C
Bernoulli equation alone
D
Continuity equation alone
Q51
In an arch dam, the major portion of the water load is transferred to:
A
The foundation through vertical compression only
B
The abutments
C
The spillway gates
D
The reservoir bed through tension
Q52
The maximum superelevation on a highway is restricted mainly because:
A
It reduces pavement strength
B
Excessive cross slope can cause slow vehicles to slide inward
C
It increases vehicle weight
D
It eliminates friction
Q53
The primary purpose of rapid sand filtration in a conventional water treatment plant is to:
A
Increase turbidity
B
Remove remaining suspended and flocculated particles
C
Add chlorine
D
Increase alkalinity
Q54
The main reason for preferring an under-reinforced RC section over an over-reinforced section is:
A
Higher self-weight
B
More ductile warning before collapse
C
Elimination of reinforcement
D
Lower concrete strength requirement in every case
Q55
In a singly reinforced under-reinforced RC beam, failure is generally initiated by:
A
Yielding of tension steel before crushing of concrete
B
Immediate crushing of compression concrete before steel yields
C
Shear failure in every case
D
Compression steel yielding
Q56
For a retaining wall, the active earth pressure condition develops when the wall:
A
Moves sufficiently away from the retained soil
B
Moves toward the soil
C
Remains completely fixed
D
Moves vertically upward only
Q57
In structural steel design, a slender compression member is particularly susceptible to:
A
Buckling
B
Pure torsion only
C
Fatigue-free behavior
D
Concrete crushing
Q58
In highway geometric design, the transition curve between a straight and a circular curve is mainly provided to:
A
Increase pavement thickness
B
Introduce centrifugal force gradually
C
Eliminate super-elevation
D
Reduce sight distance
Q59
The condition of collimation error in a dumpy level is eliminated by:
A
Changing the staff
B
Equalizing back sight and fore sight distances
C
Using a shorter staff
D
Increasing the instrument height
Q60
In wastewater treatment, the BOD test primarily measures:
A
Total dissolved salts
B
Biodegradable organic matter demand for oxygen
C
Heavy metal concentration only
D
Chloride concentration
Q61
In a flexible pavement, the primary function of the sub-base layer is to:
A
Provide skid resistance
B
Transmit wheel loads directly to the atmosphere
C
Provide drainage and distribute load while protecting the subgrade
D
Act as the wearing course
Q62
In a wide rectangular channel, critical flow occurs when:
A
Froude number is zero
B
Froude number equals unity
C
Reynolds number equals unity
D
Velocity is zero
Q63
The coefficient of permeability of a soil is most strongly affected by:
A
Particle size and void ratio
B
Color of soil
C
Plastic limit alone
D
Atmospheric pressure alone
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