Question for RITES Assistant Manager (Mechanical) 2026 - Quiz / Questions / MCQ

Objective Questions

Latest RITES Assistant Manager Mechanical Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject (Mechanical)

Question Bank RITES Assistant Manager (Mechanical) Exam - English

Concerned Subject (Mechanical)

Question 1Single Answer

A particle is subjected to three coplanar concurrent forces of 40 N, 50 N, and 60 N. For equilibrium, the angle between the 40 N and 50 N forces must satisfy which relation?

A
(\cos \theta = -\frac{49}{80})
B
(\cos \theta = -\frac{1}{8})
C
(\cos \theta = \frac{3}{8})
D
(\cos \theta = -\frac{5}{8})

Question 2Single Answer

A force of 100 N acts at a point whose position vector from the origin is (3\mathbf{i}+4\mathbf{j}) m. If the force is (60\mathbf{i}+80\mathbf{j}) N, what is its moment about the origin?

A
400 N·m clockwise
B
120 N·m clockwise
C
240 N·m anticlockwise
D
0 N·m

Question 3Single Answer

A smooth cylinder of weight W rests in a right-angled corner formed by a vertical wall and a horizontal floor. What are the reactions at the wall and floor respectively?

A
0 and W
B
W and W
C
(W/\sqrt{2}) and (W/\sqrt{2})
D
W and 0

Question 4Single Answer

A simply supported beam carries a central point load P. What is the maximum bending moment?

A
(PL/8)
B
(PL/16)
C
(PL/2)
D
(PL/4)

Question 5Single Answer

In a pin-jointed plane truss with j joints and m members, what condition indicates a perfect truss?

A
(m=2j-3)
B
(m=2j+3)
C
(m=j-1)
D
(m=3j-2)

Question 6Single Answer

In the method of joints, equilibrium at each joint is established using which equations?

A
(\sum M=0) only
B
(\sum F_x=0) only
C
(\sum F_x=0) and (\sum F_y=0)
D
(\sum F_y=0) and (\sum M=0)

Question 7Single Answer

Which statement is correct for a zero-force member in a truss joint having three members, two of which are collinear, with no external load at the joint?

A
Both collinear members are zero-force members
B
The longest member is unstressed
C
Every member carries equal force
D
The non-collinear member is a zero-force member

Question 8Single Answer

The principle of virtual work states that for a body in equilibrium, the total virtual work done by external forces for any compatible virtual displacement is?

A
Zero
B
Minimum
C
Maximum
D
Equal to strain energy

Question 9Single Answer

A particle moves with constant tangential acceleration. Which quantity necessarily varies linearly with time?

A
Normal acceleration
B
Radius of curvature
C
Speed
D
Angular momentum

Question 10Single Answer

For pure translation of a rigid body in plane motion, which statement is correct?

A
All points have equal angular velocity
B
One point remains stationary
C
All points move in circular paths
D
All points have equal linear velocity at an instant

Question 11Single Answer

The instantaneous centre of a body in pure translation lies?

A
At the centre of mass
B
At infinity
C
At the point of contact
D
At the origin

Question 12Single Answer

A disc rolls without slipping on a horizontal surface with centre velocity V. What is the velocity of its topmost point?

A
Zero
B
2V
C
(V/2)
D
V

Question 13Single Answer

The angular impulse of a force system about a point equals the change in?

A
Angular momentum about that point
B
Kinetic energy
C
Linear velocity
D
Potential energy

Question 14Single Answer

A body of mass m moving at velocity u is brought to rest by a constant force F. What is the stopping distance?

A
(mu/F)
B
(mu^2/F)
C
(mu^2/2F)
D
(2mu/F)

Question 15Single Answer

For a perfectly elastic direct central impact, the coefficient of restitution is?

A
0
B
0.5
C
1
D
Greater than 1

Question 16Single Answer

In a perfectly plastic collision between two particles, which quantity is conserved?

A
Linear momentum only
B
Kinetic energy only
C
Mechanical energy only
D
Relative velocity only

Question 17Single Answer

During an oblique impact between two smooth spheres, the impulse acts along?

A
The common tangent
B
The direction of initial velocity
C
The resultant velocity direction
D
The common normal at contact

Question 18Single Answer

A particle slides from rest down a smooth track through a vertical height h. Its speed at the bottom is?

A
(\sqrt{gh})
B
(2gh)
C
(\sqrt{2gh})
D
(gh/2)

Question 19Single Answer

D'Alembert's principle converts a dynamics problem into an equivalent statics problem by introducing?

A
Elastic force
B
Centrifugal force only
C
Impulsive force
D
Inertia force equal to (-m\mathbf{a})

Question 20Single Answer

The work done by centripetal force in uniform circular motion is?

A
Positive
B
Zero
C
Maximum
D
Negative

Question 21Single Answer

The mass moment of inertia of a thin circular ring of mass m and radius r about its central axis normal to the plane is?

A
(\frac{1}{4}mr^2)
B
(\frac{1}{2}mr^2)
C
(mr^2)
D
(2mr^2)

Question 22Single Answer

The mass moment of inertia of a uniform solid disc about a diameter in its plane is?

A
(\frac{1}{2}mr^2)
B
(mr^2)
C
(\frac{1}{4}mr^2)
D
(\frac{3}{4}mr^2)

Question 23Single Answer

According to the parallel-axis theorem, the moment of inertia about any axis parallel to a centroidal axis is?

A
(I_G-md^2)
B
(I_G+md)
C
(I_G/m+d^2)
D
(I_G+md^2)

Question 24Single Answer

The product of inertia of an area about two mutually perpendicular centroidal axes is zero when?

A
Neither axis is an axis of symmetry
B
At least one axis is an axis of symmetry
C
The area is triangular only
D
Both axes are inclined at 45°

Question 25Single Answer

Hooke's law is valid up to which point on the stress-strain curve?

A
Proportional limit
B
Yield point
C
Elastic limit
D
Ultimate point

Question 26Single Answer

The relationship among Young's modulus E, shear modulus G, and Poisson's ratio (\nu) is?

A
(E=G(1+\nu))
B
(E=2G(1+\nu))
C
(E=3G(1-2\nu))
D
(E=G/(1+\nu))

Question 27Single Answer

The relationship between Young's modulus E and bulk modulus K is?

A
(E=3K(1-2\nu))
B
(E=2K(1+\nu))
C
(E=K(1-\nu))
D
(E=3K(1+\nu))

Question 28Single Answer

For an incompressible isotropic material, Poisson's ratio is?

A
0
B
0.25
C
0.33
D
0.5

Question 29Single Answer

A bar of length L, area A, and modulus E is subjected to axial load P. Its strain energy is?

A
(P^2L/AE)
B
(P^2L/2AE)
C
(PL/2AE)
D
(P^2A/2EL)

Question 30Single Answer

Two bars of different materials are rigidly connected in parallel and subjected to a common axial load. Which quantity is equal in both bars?

A
Stress
B
Load
C
Strain
D
Modulus of elasticity

Question 31Single Answer

Two bars connected in series carry an axial load. Which quantity is necessarily identical in both bars?

A
Axial force
B
Stress
C
Deformation
D
Strain

Question 32Single Answer

A bar of uniform strength subjected to axial tension has cross-sectional area varying in proportion to?

A
Bending moment
B
Length squared
C
Axial force
D
Elastic modulus

Question 33Single Answer

The maximum shear stress in a state of plane stress with principal stresses (\sigma_1) and (\sigma_2) is?

A
((\sigma_1+\sigma_2)/2)
B
(\sigma_1-\sigma_2)
C
(\sqrt{\sigma_1\sigma_2})
D
((\sigma_1-\sigma_2)/2)

Question 34Single Answer

The centre of Mohr's circle for plane stress lies at?

A
((\sigma_x-\sigma_y)/2)
B
((\sigma_x+\sigma_y)/2)
C
(\tau_{xy}/2)
D
(\sigma_x+\sigma_y)

Question 35Single Answer

On a principal plane, the shear stress is?

A
Maximum
B
Minimum but non-zero
C
Zero
D
Equal to normal stress

Question 36Single Answer

The planes of maximum shear stress are inclined to the principal planes by?

A
45°
B
30°
C
60°
D
90°

Question 37Single Answer

In a state of pure shear (\tau), the principal stresses are?

A
(\tau) and 0
B
(2\tau) and (-2\tau)
C
(\tau/2) and (-\tau/2)
D
(\tau) and (-\tau)

Question 38Single Answer

For plane strain, the strain normal to the plane under consideration is?

A
Zero
B
Equal to Poisson's ratio
C
Maximum
D
Infinite

Question 39Single Answer

In a thin cylindrical pressure vessel, the hoop stress is?

A
(pd/4t)
B
(2pd/t)
C
(pd/2t)
D
(pt/2

Question 40Single Answer

The longitudinal stress in a thin closed cylindrical shell is?

A
(pd/2t)
B
(pd/t)
C
(pd/4t)
D
(pt/4

Question 41Single Answer

The hoop stress in a thin spherical pressure vessel is?

A
(pd/2t)
B
(2pd/t)
C
(pd/8t)
D
(pd/4t)

Question 42Single Answer

In a thin cylindrical pressure vessel, the ratio of hoop stress to longitudinal stress is?

A
1
B
1.5
C
2
D
4

Question 43Single Answer

According to Lame's theory for thick cylinders, the radial stress at a free outer surface is?

A
Equal to internal pressure
B
Equal to hoop stress
C
Maximum tensile stress
D
Zero

Question 44Single Answer

In a thick cylinder subjected only to internal pressure, the maximum hoop stress occurs at?

A
Outer surface
B
Mid-thickness
C
Neutral radius
D
Inner surface

Question 45Single Answer

Lame's expression for radial or hoop stress in a thick cylinder has the general form?

A
(A+Br^2)
B
(A+B/r)
C
(Ar+B/r^3)
D
(A+B/r^2)

Question 46Single Answer

Autofrettage of a thick cylinder is used primarily to?

A
Reduce its outer diameter
B
Increase thermal conductivity
C
Eliminate radial stress completely
D
Introduce beneficial residual compressive stresses near the bore

Question 47Single Answer

A beam segment over which the shear force is zero has bending moment that is?

A
Constant
B
Linearly varying
C
Parabolic
D
Cubic

Question 48Single Answer

The rate of change of bending moment with respect to beam length equals?

A
Load intensity
B
Slope
C
Deflection
D
Shear force

Question 49Single Answer

The rate of change of shear force with respect to beam length equals?

A
Negative load intensity under the usual sign convention
B
Bending moment
C
Beam slope
D
Flexural rigidity

Question 50Single Answer

At a point where shear force changes sign from positive to negative, the bending moment is generally?

A
Minimum
B
Maximum
C
Zero
D
Discontinuous

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Concerned Subject (Mechanical)

Question 51Single Answer

A simply supported beam carries a uniformly distributed load w over its entire span L. The maximum bending moment is?

A
(wL^2/4)
B
(wL^2/8)
C
(wL^2/12)
D
(wL^2/16)

Question 52Single Answer

A cantilever of length L carries a point load P at its free end. The fixed-end bending moment magnitude is?

A
(PL/2)
B
(PL)
C
(PL/4)
D
(2PL)

Question 53Single Answer

A cantilever carries a uniformly distributed load w over its length L. What is the maximum bending moment?

A
(wL^2/8)
B
(wL^2/2)
C
(wL^2)
D
(wL^2/4)

Question 54Single Answer

In pure bending of a homogeneous prismatic beam, the neutral axis passes through?

A
The centroid of the cross-section
B
The shear centre
C
The point of maximum stress
D
The topmost fibre

Question 55Single Answer

The flexure formula for a beam is?

A
(\sigma M=EI/R)
B
(\sigma/y=M/I=E/R)
C
(M/y=\sigma/I)
D
(\sigma/I=M/y=R/E)

Question 56Single Answer

The section modulus of a rectangular section of breadth b and depth d about its centroidal axis parallel to breadth is?

A
(bd^2/6)
B
(bd^3/12)
C
(bd^2/12)
D
(b^2d/6)

Question 57Single Answer

For a rectangular beam section, the maximum shear stress is how many times the average shear stress?

A
1
B
1.25
C
2
D
1.5

Question 58Single Answer

For a circular beam section subjected to transverse shear, the maximum shear stress is?

A
Equal to average shear stress
B
Twice average shear stress
C
(3/2) times average shear stress
D
(4/3) times average shear stress

Question 59Single Answer

In an I-section beam, most of the bending stress is resisted by?

A
Flanges
B
Web only
C
Neutral axis region
D
Fillets only

Question 60Single Answer

In an I-section beam under vertical shear, most of the shear force is resisted by?

A
Flanges
B
Web
C
Extreme fibres
D
Neutral axis line only

Question 61Single Answer

A beam of uniform flexural rigidity carries equal end moments producing pure bending. The elastic curve is?

A
Parabolic
B
Cubic
C
Circular arc
D
Straight line

Question 62Single Answer

The maximum deflection of a simply supported beam carrying a central point load P is?

A
(PL^3/24EI)
B
(PL^3/48EI)
C
(PL^3/8EI)
D
(PL^3/192EI)

Question 63Single Answer

The maximum deflection of a cantilever carrying a point load P at its free end is?

A
(PL^3/48EI)
B
(PL^3/8EI)
C
(PL^3/2EI)
D
(PL^3/3EI)

Question 64Single Answer

The slope at the free end of a cantilever carrying an end load P is?

A
(PL/EI)
B
(PL^3/3EI)
C
(PL^2/2EI)
D
(PL^2/EI)

Question 65Single Answer

The maximum deflection of a simply supported beam carrying a UDL w over the full span is?

A
(5wL^4/384EI)
B
(wL^4/8EI)
C
(wL^4/48EI)
D
(wL^4/384EI)

Question 66Single Answer

In the moment-area method, the change in slope between two points equals?

A
The first moment of the load diagram
B
The area under the (M/EI) diagram between the points
C
The area under the shear-force diagram
D
The maximum bending moment

Question 67Single Answer

Castigliano's first theorem states that the partial derivative of total strain energy with respect to a load gives?

A
Deflection in the direction of that load
B
Stress at the load point
C
Bending moment
D
Shear force

Question 68Single Answer

The unit-load method is based on which principle?

A
Conservation of momentum
B
Maximum shear stress
C
Virtual work
D
Plastic collapse

Question 69Single Answer

For a circular shaft under pure torsion, the angle of twist is?

A
(TJ/GL)
B
(GJ/TL)
C
(TL/GJ)
D
(GL/TJ)

Question 70Single Answer

The polar moment of inertia of a solid circular shaft of diameter d is?

A
(\pi d^3/16)
B
(\pi d^4/64)
C
(\pi d^4/32)
D
(\pi d^4/16)

Question 71Single Answer

The maximum shear stress in a solid circular shaft transmitting torque T is?

A
(8T/\pi d^3)
B
(64T/\pi d^3)
C
(32T/\pi d^3)
D
(16T/\pi d^3)

Question 72Single Answer

For shafts of equal length, material, and weight, which section transmits greater torque for the same maximum shear stress?

A
Solid circular shaft
B
Hollow circular shaft
C
Square shaft
D
Triangular shaft

Question 73Single Answer

A close-coiled helical spring subjected to axial load primarily experiences?

A
Direct tension only
B
Torsion in the wire
C
Bending only
D
Pure compression in the wire

Question 74Single Answer

Euler's crippling load for a pin-ended column of length L is?

A
(\pi EI/L^2)
B
(4\pi^2EI/L^2)
C
(\pi^2EI/L^2)
D
(\pi^2EI/4L^2)

Question 75Single Answer

The effective length of a column fixed at both ends is?

A
L
B
2L
C
(L/\sqrt{2})
D
L/2

Question 76Single Answer

The effective length of a column fixed at one end and free at the other is?

A
2L
B
L
C
(\sqrt{2}L)
D
L/2

Question 77Single Answer

The effective length of a column fixed at one end and hinged at the other is approximately?

A
0.5L
B
2L
C
L
D
0.7L

Question 78Single Answer

Slenderness ratio of a column is defined as?

A
Effective length divided by least radius of gyration
B
Cross-sectional area divided by length
C
Length divided by moment of inertia
D
Radius of gyration divided by length

Question 79Single Answer

Euler's column theory is most applicable to?

A
Short columns failing by crushing
B
Long slender columns failing elastically
C
Intermediate columns only
D
Columns made exclusively of cast iron

Question 80Single Answer

Rankine's formula combines the effects of?

A
Crushing and buckling
B
Torsion and bending
C
Shear and bending
D
Thermal and impact loading

Question 81Single Answer

The buckling load of a column is proportional to?

A
Effective length
B
Inverse square of effective length
C
Inverse of effective length
D
Square of effective length

Question 82Single Answer

The modulus of resilience is equal to?

A
Total strain energy at fracture per unit volume
B
Ultimate stress multiplied by strain
C
Toughness divided by strain
D
Strain energy at yield per unit volume

Question 83Single Answer

A strain gauge has gauge factor 2 and measures a strain of 500 microstrain. What fractional change in resistance occurs?

A
0.001
B
0.0005
C
0.002
D
0.005

Question 84Single Answer

The gauge factor of a metallic strain gauge is primarily related to?

A
Change in inductance per unit stress
B
Change in temperature per unit voltage
C
Change in capacitance per unit load
D
Change in electrical resistance per unit strain

Question 85Single Answer

A three-element rectangular strain rosette has gauges oriented at?

A
0°, 30°, and 60°
B
30°, 60°, and 90°
C
0°, 60°, and 120°
D
0°, 45°, and 90°

Question 86Single Answer

A three-element delta strain rosette commonly uses gauges oriented at?

A
0°, 60°, and 120°
B
0°, 30°, and 90°
C
0°, 45°, and 90°
D
30°, 90°, and 150°

Question 87Single Answer

In a Wheatstone bridge used for strain measurement, a full-bridge configuration offers which principal advantage over a quarter bridge?

A
Greater sensitivity and better temperature compensation
B
Lower sensitivity
C
No requirement of excitation voltage
D
Elimination of all measurement errors

Question 88Single Answer

For a strain gauge bonded to a specimen, poor surface preparation most directly causes?

A
Increased elastic modulus
B
Elimination of temperature effects
C
Higher gauge factor
D
Erroneous strain transfer and unstable readings

Question 89Single Answer

The principal strains from a strain rosette are determined using?

A
Only Hooke's law in one dimension
B
Strain-transformation equations or Mohr's circle for strain
C
Euler's buckling equation
D
Torsion equation only

Question 90Single Answer

A 2 m long prismatic bar of area 500 mm² and Young’s modulus 200 GPa is subjected to an axial tensile load of 50 kN. What is its elongation?

A
0.5 mm
B
2.0 mm
C
1.0 mm
D
0.25 mm

Question 91Single Answer

A steel rod is subjected to a tensile stress of 120 MPa. If (E=200) GPa and (\nu=0.3), what is the lateral strain?

A
(1.8\times10^{-4}) tensile
B
(6.0\times10^{-4}) compressive
C
(3.6\times10^{-4}) compressive
D
(2.0\times10^{-4}) tensile

Question 92Single Answer

What is its shear modulus?

A
105 GPa
B
70 GPa
C
126 GPa
D
84 GPa

Question 93Single Answer

A material has bulk modulus 140 GPa and shear modulus 84 GPa. What is its Young’s modulus?

A
224 GPa
B
210 GPa
C
196 GPa
D
168 GPa

Question 94Single Answer

A fully restrained steel bar experiences a temperature increase of 50°C. If (E=200) GPa and (\alpha=12\times10^{-6}/°C), what compressive stress develops?

A
60 MPa
B
100 MPa
C
150 MPa
D
120 MPa

Question 95Single Answer

A steel bar and an aluminium bar of equal length and area are connected in parallel between rigid end plates. If (E_s=200) GPa and (E_a=70) GPa, what proportion of the total axial load is carried by steel?

A
(7/27)
B
(13/20)
C
(20/27)
D
(2/3)

Question 96Single Answer

A bar of length L tapers uniformly from area (A_1) to (A_2) and carries axial load P. What is its extension?

A
(\frac{PL}{E(A_1-A_2)}\ln\frac{A_1}{A_2})
B
(\frac{2PL}{E(A_1-A_2)})
C
(\frac{PL}{E\sqrt{A_1A_2}})
D
(\frac{PL}{E(A_1+A_2)})

Question 97Single Answer

A vertical uniform bar of length L, area A, density (\rho), and modulus E hangs under its own weight. What is its total extension?

A
(\frac{\rho gAL}{2E})
B
(\frac{\rho gL^2}{E})
C
(\frac{\rho gL^2}{2E})
D
(\frac{\rho gL}{2AE})

Question 98Single Answer

A load P falls through height h onto the collar of a bar having stiffness k. What maximum extension x is obtained from energy balance?

A
(Px=\frac{1}{2}kx^2)
B
(P(h+x)=\frac{1}{2}kx^2)
C
(Ph=kx^2)
D
(P(h-x)=kx^2/2)

Question 99Single Answer

A plane stress element has (\sigma_x=80) MPa, (\sigma_y=20) MPa, and (\tau_{xy}=30) MPa. What is the maximum in-plane shear stress?

A
30 MPa
B
60 MPa
C
50 MPa
D
42.43 MPa

Question 100Single Answer

For the stress state (\sigma_x=100) MPa, (\sigma_y=-20) MPa, and (\tau_{xy}=40) MPa, what is the major principal stress?

A
100 MPa
B
120 MPa
C
126.49 MPa
D
112.11 MPa

Question 101Single Answer

At a point, the principal stresses are 90 MPa tensile and 30 MPa compressive. What is the maximum shear stress in the plane?

A
30 MPa
B
45 MPa
C
60 MPa
D
120 MPa

Question 102Single Answer

The angle between the physical planes represented by two points separated by 90° on Mohr’s circle is?

A
90°
B
30°
C
45°
D
180°

Question 103Single Answer

Under pure shear stress (\tau), what is the normal stress on a plane inclined at 45° to the original planes?

A
(\tau) tensile or compressive
B
Zero
C
(\tau/2)
D
(2\tau)

Question 104Single Answer

A rectangular strain rosette records (\epsilon_0=400), (\epsilon_{45}=250), and (\epsilon_{90}=100) microstrain. What is the engineering shear strain (\gamma_{xy})?

A
Zero
B
150 microstrain
C
−150 microstrain
D
300 microstrain

Question 105Single Answer

A rectangular strain rosette records (\epsilon_0=500), (\epsilon_{45}=450), and (\epsilon_{90}=100) microstrain. What is (\gamma_{xy})?

A
200 microstrain
B
300 microstrain
C
400 microstrain
D
500 microstrain

Question 106Single Answer

A thin cylindrical shell of diameter 1 m and thickness 10 mm is subjected to an internal pressure of 2 MPa. What is the hoop stress?

A
50 MPa
B
100 MPa
C
200 MPa
D
25 MPa

Question 107Single Answer

For the cylinder in 119, what is the longitudinal stress?

A
25 MPa
B
100 MPa
C
50 MPa
D
75 MPa

Question 108Single Answer

A thin closed cylinder is subjected to internal pressure. If its hoop stress is 120 MPa, what is its maximum in-plane shear stress?

A
120 MPa
B
30 MPa
C
90 MPa
D
60 MPa

Question 109Single Answer

A thin cylindrical vessel has hoop strain (\epsilon_h) and longitudinal strain (\epsilon_l). Which expression correctly gives hoop strain?

A
(\epsilon_h=(\sigma_h-\nu\sigma_l)/E)
B
(\epsilon_h=(\sigma_l-\nu\sigma_h)/E)
C
(\epsilon_h=(\sigma_h+\nu\sigma_l)/E)
D
(\epsilon_h=(\sigma_h-\sigma_l)/2E)

Question 110Single Answer

In a thick cylinder subjected to internal pressure only, how does the radial stress vary through the thickness?

A
From compressive internal pressure at the bore to zero at the outside
B
Uniformly tensile throughout
C
From zero at the bore to compressive at the outside
D
Linearly from tensile to compressive

Question 111Single Answer

Compound cylinders are commonly formed by shrink fitting primarily to?

A
Eliminate hoop stress at the outer surface
B
Convert the cylinder into a thin shell
C
Reduce radial compressive stress at the interface to zero
D
Produce a more uniform hoop-stress distribution under pressure

Question 112Single Answer

A simply supported beam of span L carries a clockwise couple M at midspan. What is the magnitude of each support reaction?

A
(M/2L)
B
(2M/L)
C
(M/L)
D
Zero

Question 113Single Answer

A cantilever beam carries a clockwise end moment M at its free end. What is the bending moment along the beam?

A
Linearly varying from zero to M
B
Constant and equal to M in magnitude
C
Parabolically varying
D
Zero except at the fixed end

Question 114Single Answer

A simply supported beam carries a uniformly varying load from zero at the left support to (w_0) at the right support. Where does the resultant load act from the left support?

A
(L/3)
B
(L/2)
C
(2L/3)
D
(3L/4)

Question 115Single Answer

For the triangular loading in 129, what is the reaction at the left support?

A
(w_0L/3)
B
(w_0L/2)
C
(w_0L/6)
D
(w_0L/4)

Question 116Single Answer

A point couple applied to a beam causes which discontinuity in its diagrams?

A
A jump in the bending-moment diagram but no jump in the shear-force diagram
B
A jump in the shear-force diagram only
C
No change in either diagram
D
A parabolic change in both diagrams

Question 117Single Answer

A concentrated transverse force applied to a beam causes?

A
A discontinuity in slope only
B
A jump in bending moment equal to the force
C
No change in shear force
D
A jump in shear force equal to the force

Question 118Single Answer

A rectangular beam of width b and depth d is rotated so that its depth becomes b and width becomes d. If (d=2b), what is the ratio of the original to rotated section modulus?

Question 119Single Answer

A rectangular beam section has width 100 mm and depth 200 mm and carries a bending moment of 20 kN·m. What is the maximum bending stress?

A
15 MPa
B
60 MPa
C
30 MPa
D
45 MPa

Question 120Single Answer

In a homogeneous beam under simple bending, the longitudinal strain distribution over the depth is?

A
Linear
B
Parabolic
C
Uniform
D
Hyperbolic

Question 121Single Answer

At the free upper and lower surfaces of a rectangular beam subjected to transverse shear, the shear stress is?

A
Maximum
B
Equal to average shear stress
C
Half the maximum value
D
Zero

Question 122Single Answer

In a rectangular beam carrying shear force V, where does the maximum shear stress occur?

A
At the neutral axis
B
At the extreme tensile fibre
C
At one-quarter depth
D
Uniformly over the depth

Question 123Single Answer

The shear flow in a thin-walled beam section is given by?

A
(q=VI/)
B
(q=Mt/I)
C
(q=V/It)
D
(q=V/I)

Question 124Single Answer

The transverse shear stress at a point in a beam section is given by?

A
(\tau=VI/)
B
(\tau=M/I)
C
(\tau=V/It)
D
(\tau=VIt/)

Question 125Single Answer

For a symmetrical I-section beam, the neutral axis and centroidal axis are?

A
Parallel but distinct
B
Perpendicular
C
Coincident only under zero moment
D
Coincident under ordinary elastic bending

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