Strength of Materials

In mechanics of materials, the strength of a material is its ability to withstand an applied load without failure or plastic deformation. The field of strength of materials deals with forces and deformations that result from their acting on a material. The complete theory began with the consideration of the behaviour of one and two dimensional members of structures.

The deformation per unit length is called
Which of the following materials has the least modulus of elasticity?
It states that the elongation is proportional to the force
Stress on an object is____its applied force
A rigid body under the action of external forces can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
A static load is mounted at the centre of a shaft rotating at uniform angular velocity. This shaft will be designed for

What are the material which show direction dependent properties, called?
The deformation of a bar under its own weight as compared to that when subjected to a direct axial load equal to its own weight will be:

When a wire is stretched to double in length, the longitudinal strain produced in it is:
The elastic constant E, G and K are related by the expression:
The value of Poisson's ratio depends upon
Brittleness is opposite to
Modulus of rigidity is defined as the ratio of
What is the arc of contact when in an involute tooth profile the pressure angle is 20° and path of contact is 45 mm?
The suitable bearing for fluctuating loads is
If the slenderness ratio for column is 100, then it is said to be a____column.
In case of a cam, the maximum value of the pressure angle is kept as
Critical damping is a function of
Hardness is resistance to:
Impact strength of a material is
During a tensile test on a specimen of 2 cm^2 cross section, maximum load is 110 KN and area of cross section at neck is 55 cm^2. Ultimate Tensile Strength (UTS) of specimen is
Resilience of a material is
Brittle material fail by shearing along the plane inclined at_____to the longitudinal axis
Limiting value of Poisson's ration are:
Which of the following statement is wrong?
The strength of the shaft is judged by the
The angle of twist is measured in
The thermal stress in a bar is proportional to the change in temperature
The thermal or temperature stress is a function of
The bending moment at the free end of a cantilever beam is
Calculating the normal stress acting on the plane of maximum shear stress, considering the following states of stress shown in figure.

A spring of radius 1 cm obeys Hooke's law. A mass of 2 kg is attached to the spring. Calculate the extension of the spring. The spring constant k is 110 N/m
When a square or rectangular block subjected to a shear load is in equilibrium, the shear stress in one plane is always associated with a complementary shear stress in the other plane at______degrees to it.
Spherical vessels are preferred over cylindrical shapes due to
The relation between the diameter of a rivet (d) and plate thickness (t) is given by,
What is the ratio between buckling load and safe load known as?
A measure of the resistence of a material to change of volume without change of shape
The modulus of elasticity is known as
What is the unit of the modulus of elasticity?
The elastic deformation of a material is
What is the ratio of the transverse strain to the corresponding axial strain of unaxial stress?
The ratio of the lateral strain to the linear strain within elastic limit is known as
Volumetric strain is the
Within elastic limit, the volumetric strain is proportional to the hydrostatic stress.
A curved member with a straight vertical leg is carrying a vertical load at Z. As shown in figure. The stress resultants in XY segment are

The ratio of direct stress to volumetric strain subjected to 3D stresses, is equal to
What is another term for modulus of rigidity?
Within elastic limit, the shear stress is proportional to shear strain. What is called?
The ratio between tensile stress and tensile strain or compressive stress and compressive strain is termed as
When the beam is subjected to transverse shearing force, the shear stress in the upper fiber will be:
Strength of materials can be describes as "statics of deformable_____bodies"
The material having same elastic properties in all directions are called
A bar of varying square cross-section is loaded symetrically as shown in the figure. Loads shown are placed on one of the axes of symmetrical cross-section. Ignoring self weight, the maximum tensile stress in N/mm2 anywhere is

Tensile and compressive stress are caused by forces____to the areas on which they act
Stress on an object is_____its cross sectional area
Measured mechanical properties of materials are same in a particular direction at each point. This property of the material is known as
One Newton per square meter is one
What is the unit of strain?
The intensity of stress which causes unit strain is called___
A material obeys Hooke's law up to

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