Physics

Solid Mechanics

510 Questions

Solid mechanics questions evaluate the understanding of stress, strain, and material deformation under various loads. Topics include analyzing beams, cantilevers, and structural steel designs using specific industrial standards. These principles are strictly examined in engineering and civil services preliminary tests.

Stress and strainBeam analysisPrestressed concreteMaterial strengthStructural design

Solid Mechanics Questions

Multiple choice technology

A cotter joint is generally used to transmit

  1. Shear forces

  2. Tensile forces

  3. Bending Forces

  4. Torque
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A cotter joint is designed to connect two rods and transmit axial loads. The cotter (a flat wedge) passes through slots in both rods, and when tightened, it transfers primarily shear forces across the joint.

Multiple choice technology

In Fe415 steel, 415 denotes

  1. Tensile strength

  2. Compressive strength

  3. Bearing strength

  4. Crushing strength
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The number 415 in Fe415 steel represents its yield strength of 415 MPa, which is the stress level at which permanent deformation begins. This is fundamentally related to tensile properties. Compressive, bearing, and crushing strengths are different material properties not indicated by this designation.

Multiple choice technology

Detrimental property of a material for shock load applications

  1. Low toughness

  2. High strength

  3. Low hardness

  4. High density
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Toughness is the capacity of a material to absorb energy and deform plastically without fracturing under sudden impacts. A material with low toughness is brittle and highly susceptible to failure under shock loads, making it a critical detrimental property. High strength, low hardness, or high density are not primary shock-failure properties.

Multiple choice

The reciprocal of bulk modulus is called

  1. co-efficient of elasticity

  2. shearing strain

  3. volumetric strain

  4. compressibility
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 The reciprocal of bulk modulus is called compressibility

Multiple choice

For a lever to be classified as a force multiplier,

  1. the load arm must be longer than the effort arm

  2. the load arm and the effort arm must be of the same length

  3. the load arm must be shorter than the effort arm

  4. any arm can be greater

  5. the length of the arms is calculated according to the effort
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a force multiplier, the effort arm is always longer than the load arm.

Multiple choice

What is the maximum strength of HUF?

  1. 20

  2. 10

  3. 50

  4. No limit
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In HUF form of business, all the members of a Hindu Undivided Family own the business jointly. The membership is limited up to three successive generations. There is no limit to the number of members.

Multiple choice

The measure of stiffness of track required to produce a unit depression in the track is known as

  1. tractive force

  2. load capacity

  3. gauge

  4. track modulus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Track modulus is the technical term for the measure of track stiffness - it quantifies the load required to produce a unit depression in the track. Tractive force (option A) relates to pulling power, load capacity (option B) is maximum load bearing, and gauge (option C) is the distance between rails.

Multiple choice

A load cell consists of a solid cylinder(steel) of 30 mm diameter with four strain gauges bonded to it in Poisson’s arrangement and connected into the four arms of a wheatstone bridge. The gauges are 200 ohm each with a gauge factor of 2.0. Determine the sensitivity of the load cell when load applied to the cell is 2000kg and voltage applied to the bridge is 12 V, the modulus of elasticity of steel is 200 GN/m2 and Poisson’s ratio = 0.295.

  1. 9.16 x 10-6

  2. 10

  3. 9.16 x 106

  4. 8.23 x 106
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sensitivity of the load cell per kN of applied load to the cell and per volt of voltage applied to the bridge = Vo/(F in newtons x V) = (2.157 X 10-3)/((2000 X 9.81)/1000 ) x 12 = 9.16 x 10-6 

Multiple choice

If a small concrete cube is submerged deep in still water in such a way that the pressure exerted on all faces of the cube is p, then the maximum shear stress developed inside the cube is

  1. 0
  2. $\frac{P}{2}$

  3. p

  4. 2p
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a body is subjected to hydrostatic pressure (p on all sides), the principal stresses are equal (sigma1 = sigma2 = sigma3 = -p). The maximum shear stress is (sigma1 - sigma3) / 2, which equals (-p - (-p)) / 2 = 0.

Multiple choice

The following statements are related to bending of beams: I. The slope of bending moment diagram is equal to the shear force II. The slope of the shear force diagram is equal to the load intensity. III. The slope of curvature is equal to the flexural rotation. IV. The second derivative of the deflection is equal to the curvature. The only FALSE statement is

  1. I

  2. II

  3. III

  4. IV
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement III is false. The slope of the deflection curve is the rotation, and the curvature is the second derivative of deflection. The slope of curvature is not flexural rotation.