STRENGTH OF MATERIAL MCQ-04

Q.1 The value of poisson's ratio for cast iron is __.

A. 0.25 to 0.45

B. 0.23 to 0.27

C. 0.15 to 0.25

D. 1.05 to 2.00

Ans-: B

Q.2 Which of the following have the poisson's ratio more than unity ?

A. Aluminum

B. Wrought iron

C. Steel

D. None of the above

Ans-: D

Q.3 ______ is the phase of plastic or inelastic action.

A. Creep

B. Strain

C. Elongation

D. Fatigue stress

Ans-: A

Q.4 When the cyclic variation to either load or strain is coincident with respect to time then ______ occur.

A. Creep stress

B. Fatigue stress

C. Tensile strength

D. Impact stress

Ans-: B

Q.5  The elasticity of various materials is controlled by it's 

A. Proof stress

B. Tensile stress

C. Stress at elastic limit

D. Ultimate tensile stress

Ans-: C

Q.6 what happened when a material expands freely due to heating , it will develop_____.

A. Tensile stress

B. Ultimate tensile stress

C. Bending

D. No stress

Ans-: D

Q.7 The stress developed in a material at breaking point in extension is called _____.

A. Breaking stress

B. Proof stress

C. Unit stress

D. Tensile strength

Ans:- A

Q.8 In which stress the load at breaking point or neck area .

A. Rupture stress

B. Tensile stress

C. Ultimate stress

D. None of the above

Ans-: A

Q.9  The property of a material which allows it to be drawn into a smaller section is called ?

A. Ductility

B. Malleability

C. Plasticity

D. Elasticity

Ans-: B

Q.10 Modulus of elasticity in shear is sometimes called the _____.

A. Yield point stress

B. Elastic limit

C. Modulus of rigidity

D. Modulus of resilience

Ans-: C

STRENGTH OF MATERIAL MCQ-:03

Q.1 The unit of Young's modulus is ____.

A. Kg

B. Kg/cm

C. Kg/cm^2

D. Kg/cm^3

Ans-: C

Q.2 Isotropic material have _____ properties in all directions .

A. Different elastic properties

B. Same elastic properties

C. No elastic properties

D. Various elastic properties

Ans-: B

Q.3 The maximum energy stored at elastic limit, is known as ______.

A. Resilience

B. Creep

C. Stress

D. Proof resilience

Ans-: D

Q.4 The proof resilience per unit volume is known as ______.

A. Modulus of resilience

B. Resilience

C. Flow of metal

D. Resilience limit

Ans-: A

Q.5  which of the following are is a graphical representation of the stress in an element subjected to general two dimension stress system.

A. Flow chart diagrams

B. Mohr's circle diagram

C. A+B

D. None of the above

Ans-: B

Q.6 The ultimate tensile stress of mild steel compared to ultimate compressive stress is ____.

A. Same

B. Less

C. More 

D. Variable

Ans-: C

Q.7 The intensity of stress which causes unit strain is called ____.

A. Bulk modulus

B. Modulus of elasticity

C. Unit stress

D. Total stress

Ans-: B

Q.8 The unit of strain is ?

A. N/m

B. Kg/m

C. N/m^2

D. No unit 

Ans-: D

Q.9  Which type of strength of a material is an index of its toughness?

A. Tensile strength

B. Impact strength

C. Ultimate strength

D. Unit strength

Ans-: B

Q.10 The poisson's ratio for steel is between __.

A. 0.25 to 0.33

B. 0.25 to 0.45

C. 0.05 to 0.1

D. 1.5 to 2.5

Ans-: A

MECHANICAL PROPERTIES MCQ

Q. 1 If the smallest load produces a permanent deformation on a material than this material known as plastic and process of deformation is ?

A. Elasticity

B. Plasticity

C. Ductility

D. Malleability

Ans-: B

Q.2 The ability of a material to undergo Large per-manent deformation in tension i.e. material to be drawn into a wire known as

A. Ductility

B. Malleability

C. Machinability

D. Plasticity

Ans-: A

Q.3 A material , which can be only slightly defor-med without rupture is termed as _____.

A. Brittle material

B. Ductile material

C. Elastic material

D. Plastic material

Ans-: A

Q.4 A material which have ability to resist defor-mation under stress called ______ material.

A. Brittle

B. Ductile

C. Stiff

D. None of the above

And -: C

Q.5 Which of the following is the opposite term of plasticity?

A. Elasticity

B. Malleability

C. Ductility

D. Brittleness

Ans-: D

Q.6 The " factor of safety " is the ratio of ultimate strength of the material to the _______.

A. Strain

B. Allowable stress

C. Ultimate stress

D. Yield point

Ans-: B

Q.7  The ability of a material to deform and return to its original shape upon removal of the load is called?

A. Elasticity

B. Plasticity

C. Toughness

D. Stiffness

Ans-: A

Q.8  The property of the material which permits material to be beaten or rolled into thin sheets.

A. Toughness

B. Hardness

C. Malleability

D. Ductility

Ans-: C

Q.9 Which property of the material provide the ability to resist very small indentation , abrasion and plastic deformation ?

A. Hardness

B. Toughness

C. Brittleness

D. Stiffness

Ans-: A

Q.10 The ability to withstand high unit stress to-gether with great unit deformation without comp-lete fracture. 

A. Hardness

B. Brittleness

C. Stiffness

D. Toughness

Ans-: D

Q.11  Cast iron is a _____ material .

A. Malleable

B. Brittle

C. Ductile

D. Plastic

Ans-: B

Q.12 Which of the following are not the ductile material?

A. Coper

B. Steel

C. Aluminum

D. Glass

Ans-: D

Q.13 Which of the following material is most elastic?

A. Rubber

B. Steel

C. Plastic

D. Glass

Ans-: B

Q.14 The material which exhibit the same elastic properties in all directions are called ?

A. Isentropic

B. Isotropic

C. Homogeneous

D. None of the other

Ans-: B

Q.15 The total strain energy stored in a body is termed as ____.

A. Toughness

B. Hardness

C. Resilience

D. Stiffness

Ans-: C

STRESS MCQ -: 01

Q.1 The change in length per unit length is known as ?

A. Stress

B. Strain 

C. Elasticity

D. Ductility

Ans-: B

Q.2 The ratio of the maximum load that a speci-men sustain to it's original area of the cross -section is known as_______.

A. Stress 

B. Shear stress

C. Ultimate stress

D. Strain

Ans-: C

Q.3 The maximum unit stress to which a material may be subjected and steel be able to return to it's original form removal of stress is called ___.

A. Proportional limit

B. Yield point limit

C. Unit stress

D. Elastic limit

Ans-: D

Q.4 The stress per unit area is called ?

A. Unit stress

B. Total stress

C. Ultimate stress

D. Shear stress

Ans-: A

Q.5 The highest unit stress at which the stress is proportional to deformation is known as _____.

A. Proportional limit

B. Elastic limit

C. Yield point

D. Ultimate stress

Ans-: A

Q.6 The unit stress at which the deformation first increases markedly without any increase in the applied load is called _______ of a material.

A. Ultimate strain

B. Ultimate stress

C. Yield point

D. Elastic limit

Ans-: C

Q.7 Ultimate strength is the ____ unit stress it can sustain before rupturing.

A. Lowest

B. Highest

C. Constant

D. Shear

Ans-: B

Q.8 The unit stress at which the material tested ruptures.

A. Maximum strength

B. Ultimate strength

C. Breaking strength

D. Poor strength

Ans-: C

Q.9 Yield point is always ______ the proportional limit.

A. Above

B. Below

C. Equal

D. None of the above

Ans-: A

Q.10 The stress on a section is one that acts in a direction perpendicular to section considered called ?

A. Unit stress

B. Shear stress

C. Normal stress

D. Total stress

Ans-: C

Engineering mechanics MCQ-: 07

Q.1 What is the escape velocity on the surface of the earth?

A. 11.2 km/sec

B. 11.2 m/sec

C. 1.5 km/sec

D. 2.5 m/sec

Ans-: A

Q.2 What happened , if the speed of rotation of earth decrease ?

A. The weight of the body will remain same

B. The weight of the body will decrease

C. The weight of the body will increase

D. None of the above

Ans-: C

Q.3 "If three forces acting on a particle keep it in equilibrium then each is proportional to the sine of the angle between the other two " .

A. Law of superposition

B. Lami's theorem

C. Pascal's law

D. Law of moments

Ans-: B

Q.4 A string which offers no resistance on bending at any point is called ?

A. Curve string

B. Bend string

C. Flexible string

D. Uniform string 

Ans-: C

Q.5 A machine is said to be _______ when the load gets lowered on removal of the effort.

A. Ideal

B. Irreversible

C. Reversible

D. None of the above

Ans-: C

Q.6 If an object is thrown in air with certain initial velocity and allowed to fall under influence of gravity, it will traverse along a certain path before falling on the ground ,known as _____.

A. Hyperbolic

B. Circular

C. Constant

D. Trajectory

Ans-: D

Q.7 Which type of shape trajectory have?

A. Circular

B. Parabolic

C. Hyperbolic

D. Straight

Ans-: B

Q.8  Rotational power P = torque × _______.

A. Angular velocity

B. Force

C. Acceleration

D. Angular viscosity

Ans-: A

Q.9 The point on the body at which a blow may be struck so that the reaction at the point of suspen-sion is zero.

A. Centre of gravity of the body

B. Centre of percussion

C. Centre of gravity

D. None of the above

Ans-: B

Q.10 Gravitation deals with the mutual attraction which exists between _____.

A. Bodies

B. Points

C. Systems

D. None on the above

Ans-: A

Standardization in operation management

Standardization refers to the reducing the variety of items to a minimum by fixing sizes, shapes, di-mensions and other quality characteristics of the item. A standardization process consists of criti-cally examining the items to be stocked or manu- factured for -

(a) The performance characteristics and the use characteristics.

(b) The uses to which these parts are intended.

Standardization helps in the product design by-

(a) Specifying rating of machines or equipments.  (b) Specifying methods of inspection and testing.

(c) Specifying physical and chemical properties of materials.

(d) Specifying a defined range for physical dimen-sions and tolerances of components.

(e) Specifying methods of installation.

DESIGN FOR MANUFACTURING

Design for manufacturing is the structured metho -dology which guides the product designer during designing. It uses catalogs of information, guide- lines, checklists, tables, diagrams and graphs to help the designer develop a design plan , decom-pose products into components and assemblies, evaluate the production costs of product design and thus simplifies the product design. Design for manufacturing, thus refers to the processes which hvae been developed for reducing manufa-cturing cost without compromising the product quality.