Strain is defined as the ratio of

Hooke’s law holds good up to

Young’s modulus is defined as the ratio of

The unit of Young’s modulus is

Deformation per unit length in the direction of force is known as

It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called

The materials having same elastic properties in all directions are called

A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under

Modulus of rigidity is defined as the ratio of

If the radius of wire stretched by a load is doubled, then its Young’s modulus will be

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

Tensile strength of a material is obtained by dividing the maximum load during the test by the

The impact strength of a material is an index of its

The Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length

Percentage reduction of area in performing tensile test on cast iron may be of the order of

The intensity of stress which causes unit strain is called

True stress-strain curve for materials is plotted between

During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is

For steel, the ultimate strength in shear as compared to in tension is nearly

Which of the following has no unit

Which is the false statement about true stress-strain method

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

If a part is constrained to move and heated, it will develop

Which of the following materials is most elastic

The value of modulus of elasticity for mild steel is of the order of

The value of Poisson’s ratio for steel is between

The buckling load for a given material depends on

The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight

The property of a material by virtue of which a body returns to its original, shape after removal of the load is called

The materials which exhibit the same elastic properties in all directions are called

The value of Poisson’s ratio for cast iron is

The property of a material which allows it to be drawn into a smaller section is called

Poisson’s ratio is defined as the ratio of

For which material the Poisson’s ratio is more than unity

The property of a material by virtue of which it can be beaten or rolled into plates is called

The change in the unit volume of a material under tension with increase in its Poisson’s ratio will ,

The percentage reduction in area of a cast iron specimen during tensile test would be of the order of

If a material expands freely due to heating it will develop

In a tensile test, near the elastic limit zone, the

The stress necessary to initiate yielding is

In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called

The stress developed in a material at breaking point in extension is called

Rupture stress is

The elasticity of various materials is controlled by its

The ratio of lateral strain to the linear strain within elastic limit is known as

The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to

The stress at which extension of the material takes place more quickly as compared to the increase in load is called

In question 56, the internal reaction in bottom 80 cm length will be

Flow stress corresponds to

When it is indicated that a member is elastic, it means that when force is applied, it will

The energy absorbed in a body, when it is strained within the elastic limits, is known as

Resilience of a material is considered when it is subjected to

The maximum strain energy that can be stored in a body is known as

The total strain energy stored in a body is termed as

Proof resilience per material is known as

The stress induced in a body due to suddenly applied load compared to when it is applied gradually is

The strain energy stored in a body due to suddenly applied load compared to when it is applied gradually is

A material capable of absorbing large amount of energy before fracture is known as

A beam is loaded as cantilever. If the load at the end is increased, the failure will occur

A non-yielding support implies that the

The ratio of elongation in a prismatic bar due to its own weight (W) as compared to another similar bar carrying an additional weight (W) will be

In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are

In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the

The distance between the centres of the rivets in adjacent rows of zig-zag riveted joint is known as

Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in

When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as

A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as

A riveted joint in which the number otrivets decrease from innermost to outer most row is called

If the rivets in adjacent rows are staggered and the outermost row has only one rivet, the arrangement of the rivets is called

Diamond riveted joint can be adopted in the case of following type of joint

Rivets are made of following type of material

The weakest section of a diamond riveting is the section which passes through

The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is

The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called

A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be

A cylindrical section having no joint is known as

Longitudinal stress in a thin cylinder is

The safe twisting moment for a compound shaft is equal to the

The torsional rigidity of a shaft is expressed by the

The value of shear stress which is induced in the shaft due to the applied couple varies

A key is subjected to side pressure as well at shearing forces. These pressures are called

In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be

Shear stress induced in a shaft subjected to tension will be

If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella

A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is

Limiting force of friction is the

Coulomb friction is the friction between

Dynamic friction as compared to static friction is

Tangent of angle of friction is equal to

Kinetic friction is the

The effort required to lift a load W on a screw jack with helix angle a and angle of friction

A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of

The algebraic sum of moments of the forces forming couple about any point in their plane is

A single force and a couple acting in the same plane upon a rigid body

. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

. The maximum frictional force which comes into play when a body just begins to slide over another surface is called

. The co-efficient of friction depends upon

. The necessary condition for forces to be in equilibrium is that these should be

. If three forces acting in different planes can be represented by a triangle, these will be in

. If n = number of members andy = number of joints, then for a perfect frame, n =

. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly (C) 96 m

. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to

Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

. Which of the following is not the unit of energy

. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

. The C.G. of a solid hemisphere lies on the central radius 3r

. The C.G. of a plane lamina will not be at its geometrical centre in the case of a

. The C.G. of a right circular solid cone of height h lies at the following distance from the base

. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

. Which of the following is the example of lever of first order

. A pair of smith’s tongs is an example of the lever of

. In the lever of third order, load W, effort P and fulcrum F are oriented as follows

. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of

. In actual machines

. In ideal machines

. A cable with a uniformly distributed load per horizontal metre run will take the following shape