Assistant Soil Conservation Engineer • Paper-I
Which of the following is a scalar quantity?
A)
Force
B)
Speed
C)
Velocity
D)
Acceleration
Speed has magnitude only, so it is scalar.
Assistant Soil Conservation Engineer • Paper-I
The Poisson’s ratio is defined as
A)
Axial stress/lateral stress
B)
Lateral strain/axial strain
C)
Lateral stress/axial stress
D)
axial strain/lateral strain
Poisson’s ratio is lateral strain/axial strain in magnitude.
Assistant Soil Conservation Engineer • Paper-I
If the principal stresses in two dimensional case are -10 MPa and 20 MPa respectively, then maximum shear stress at the point is
A)
10 MPa
B)
15 MPa
C)
20 MPa
D)
30 MPa
Maximum shear=(20−(−10))/2=15 MPa.
Assistant Soil Conservation Engineer • Paper-I
The compression stress in concrete at the level of centroid of compression steel is equal to
A)
0.416 Fck
B)
0.446 Fck
C)
0.36 Fck
D)
0.57 Fck
At the centroidal level of compression steel, the standard value in this exam set is 0.446fck.
Assistant Soil Conservation Engineer • Paper-I
A well seasoned timber may contain moisture upto
A)
4 to 6 %
B)
8 to 10 %
C)
10 to 12 %
D)
12 to 15%
Well-seasoned timber typically has about 10–12% moisture content.
Assistant Soil Conservation Engineer • Paper-I
In a steel plate with bolted connections, the rupture of the net section is mode of failure under
A)
Shear
B)
Bending
C)
Flexure
D)
Tension
Net-section rupture is a tensile failure mode.
Assistant Soil Conservation Engineer • Paper-I
The product of mass and velocity of a moving body is called
A)
Moment
B)
Momentum
C)
Power
D)
Impulse
Mass × velocity is momentum.
Assistant Soil Conservation Engineer • Paper-I
In the displacement method of structural analysis, the basic unknowns are
A)
Displacement
B)
Force
C)
Displacement and forces
D)
Stiffness
The displacement method takes displacements as the basic unknowns.
Assistant Soil Conservation Engineer • Paper-I
An R.C.C column is treated as short column if its slenderness ratio is less than
A)
30
B)
35
C)
40
D)
50
A reinforced-concrete column is short when its slenderness ratio is below 12 by strict IS 456 definition; among these options, the exam convention/source uses 30, so A is selected.
Assistant Soil Conservation Engineer • Paper-I
The shape of the bending moment diagram over the length of a beam carrying a uniformly distributed load is always
A)
Linear
B)
Parabola
C)
Cubical
D)
Circular
A UDL produces a parabolic bending-moment diagram.
Assistant Soil Conservation Engineer • Paper-I
Modulus of rupture of concrete is a measure of
A)
Flexural tensile strength
B)
direct tensile strength
C)
compressive strength
D)
split tensile strength
Modulus of rupture measures flexural tensile strength.
Assistant Soil Conservation Engineer • Paper-I
For an isotropic material, the relationship between the Young’s modulus (E), shear modulus (G) and Poisson’s ratio (µ) is given by
A)
G = E / 2(1+µ)
B)
G = E / 2(1+µ)
C)
G = E / (1+2µ)
D)
G = E / 2(1-µ)
For isotropic material, G=E/[2(1+ν)]; A and B are duplicates.
Assistant Soil Conservation Engineer • Paper-I
The friction experienced by a body when in motion
A)
Static friction
B)
Dynamic friction
C)
Limiting friction
D)
Coefficient of friction
Motion involves dynamic/kinetic friction.
Assistant Soil Conservation Engineer • Paper-I
The maximum number of steps in a flight should generally be restricted to
A)
10
B)
12
C)
15
D)
18
A flight is generally limited to about 12 steps before an intermediate landing.
Assistant Soil Conservation Engineer • Paper-I
The maximum permissible differential settlement for foundation in sandy soil is
A)
5 mm
B)
15 mm
C)
25 mm
D)
35 mm
The common permissible differential settlement limit for sandy soil in this context is 15 mm.
Assistant Soil Conservation Engineer • Paper-I
The moment required to rotate the near end of a prismatic beam through a unit angle without transition, the far end being simply supported, is given by (EI – flexural rigidity and L is the span of beam)
A)
3EI/L
B)
4EI/L
C)
2EI/L
D)
EI/L
The end stiffness with far end simply supported is 3EI/L.
Assistant Soil Conservation Engineer • Paper-I
For any system of coplanar forces, the condition of equilibrium is that
A)
Algebraic sum of horizontal components of all forces should be zero
B)
Algebraic sum of vertical components of all forces should be zero
C)
Algebraic sum of moments of all forces should be zero
D)
All the above
Equilibrium of a coplanar force system requires ΣH=0, ΣV=0 and ΣM=0.
Assistant Soil Conservation Engineer • Paper-I
Struts are load carrying member of a frame, which are subjected to
A)
Transverse load
B)
Axial tensile load
C)
Axial compressive load
D)
Torsional load
Struts carry axial compression.
Assistant Soil Conservation Engineer • Paper-I
The bearing capacity of soil in water logged soil can be improved by
A)
Grouting
B)
Compaction
C)
Increasing the foundation depth
D)
Draining the soil
Draining lowers pore-water pressure and improves effective stress and bearing capacity.
Assistant Soil Conservation Engineer • Paper-I
The strength of concrete primarily depends on
A)
Quantity of cement
B)
Quantity of aggregate
C)
Strength of the aggregate
D)
Water-cement ratio
Concrete strength is strongly governed by the water-cement ratio.
Assistant Soil Conservation Engineer • Paper-I
The kinematic indeterminacy of single bay portal frame fixed at the base is
A)
1
B)
2
C)
3
D)
0
A fixed-base single-bay portal frame has three independent kinematic degrees of freedom in the exam convention.
Assistant Soil Conservation Engineer • Paper-I
The velocity of a particle (v) moving with simple harmonic motion, at any given instant is given by (where r = amplitude of motion, y = displacement of particle from mean position)
A)
ω√(y2-r2)
B)
ω √(r2-y2)
C)
ω2 √(y2-r2)
D)
ω2 √(r2-y2)
For SHM, v=ω√(r²−y²).
Assistant Soil Conservation Engineer • Paper-I
As per IS : 800, the maximum deflection in a beam of span L should not exceed
A)
L/180
B)
L/250
C)
L/325
D)
L/360
IS 800 uses L/325 here as the maximum deflection limit for a beam of span L.
Assistant Soil Conservation Engineer • Paper-I
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
A)
25
B)
30
C)
35
D)
40
The exam convention for a simply supported two-way slab uses a maximum span/depth ratio of about 35.
Assistant Soil Conservation Engineer • Paper-I
Equation of motion of a point in a straight line, is
A)
v = u + ft
B)
S = ut +(1/2) ft2
C)
2fS = v2-u2
D)
All of the above
All three are standard constant-acceleration equations, so D.
