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.

ENGINEERING MECHANICS MCQ-:07

Q.1 What is the length of a second pendulum?

A. 100 cm

B. 75 cm

C. 99.4 cm

D. 95.3 cm

Ans-: C

Q.2 In second pendulum, the pendulum executes _____ per second. 

A. One beat

B. Two beat

C. Three beat

D. Four beat

Ans-: A

Q.3 Two forces can be equilibrium only if they are equal in magnitude, opposite in direction, and collinear in action .

A. Law of superposition

B. Law of equilibrium 

C. Law of moments 

D. Law of dynamic friction

Ans-: B

Q.4 According to law of dynamic friction,  friction force ______ at a slow rate with the increase of speed.

A. Increases 

B. Constant 

C. Decrease 

D. Zero

Ans-: C

Q.5 When a body starts moving , the force of friction offered by the surface is called ___. 

A. Static friction 

B. Dynamic friction 

C. Limiting friction 

D. Force of friction 

Ans-: B

Q.6 A body in simple harmonic motion will have maximum velocity when it's amplitu-de is _____.

A. Zero

B. Maximum 

C. One

D. Minimum 

Ans-: A

Q.7 When a ship displace water equal to its own _____ it will not sink.

A. Volume 

B. Density 

C. Surface area

D. Weight 

Ans-: D

Q.8 The period of oscillation of a simple pendulum depends on the _____.

A. Density of Bob

B. It's effective length

C. Mass of Bob 

D. Weight of Bob 

Ans-: B

Q.9 For a falling body , the sum of kinetic and potential energy is ______.

A. Zero

B. Constant at all point

C. Maximum at starting point 

D. Minimum at starting point 

Ans-: B

Q.10 In simple harmonic motion the acce-leration is proportional to ____.

A. Velocity 

B. Displacement 

C. Distance 

D. Time 

Ans-: B

ENGINEERING MECHANICS MCQ-:06

Q.1 When the acceleration is proportional to displacement the motion is called ?

A. Gyroscopic 

B. Rotational 

C. Simple harmonic 

D. Angular 

Ans-: C

Q.2 In the universe, which type of force keeping the planets in a regular orbit ?

A. Magnetic force 

B. Gravitational force 

C. Electromagnetic force

D. Electrostatic force

Ans-: B

Q.3 A swinging pendulum eventually stops because its energy is ______.

A. Converted to heat energy

B. Converted to electrical energy 

C. Destroyed 

D. None of the above 

Ans-: A

Q.4 When the angle of projection is _____ the range of projectile is maximum. 

A. 90°

B. 45°

C. 30°

D. 180°

Ans-: B

Q.5 The escape velocity of a body on the earth remains unchanged with variation of _________.

A. Speed

B. Length 

C. Mass

D. Weight

Ans-: C

Q.6 The escape velocity is depends upon the ______.

A. Mass of the body 

B. Weight of the body

C. Speed of the body 

D. Planet 

Ans-: D

Q.7 Time in upward journey is ____ as in downward journey. 

A. Same

B. Maximum 

C. Minimum 

D. Depend on the distance 

Ans-: A

Q.8 When two systems are in resonance, then the following parameter for both is equal ?

A. Wavelength 

B. Frequency 

C. Intensity 

D. Amplitude 

Ans-: B

Q.9 According to law of static friction the magnitude of the force of friction,is always ______ to the applied force. 

A. Maximum 

B. Equal 

C. Minimum 

D. Greater than 

Ans-: B

Q.10 The force of friction depends upon the __________ of the surface. 

A. Area 

B. Roughness 

C. Thickness 

D. All of the above 

Ans-: B

TOTAL QUALITY MANAGEMENT

                              TQM 

"TQM is an integrated managment approa-ch in satisfying customer needs in totality on a continuing basis through the involve-ment of each and every employee in orga-nization making continuous improve-ment on one side and an appropriate cost effec-tive technology alongwith proper solving methodology, on the other".

                 TQM means managing the entire organization so that it excels on all dimen-sion of products and services that are the important to the customer. Main theme be-hind TQM is that the quality cannot be ins-pected into a product,  it need to be make right at the first time. It is possible to ach-ieve defect free work most of the time. This approach is called ' right first time ', ' every time 'or zero defects.This emphasize s use of continuous measurement,process control and the data driven elimination of scrap and rework. Most of the defects can be avoided by good design , structured process and trained people. 

Principles of TQM  

          TQM focuses at two levels. Firstly an external one aimed at identifying customer requirements and secondly an internal one focusing on organization, systems and the procedures to meet those requirements right the first time and every time. 

TOTAL PRODUCTIVE MAINTENANCE

TOTAL PRODUCTIVE MAINTENANCE 

In 1971, the Japan institute of plant maint-enance defined TPM as a system of maint-enance covering the entire life of the equi-pment in every division, including planning, manufacturing and maintenance. Because of its objective to increase equipment the productivity,  the term TPM ,is sometimes known as Total productivity management. TPM emphasizes preventive maintenance and transfer routine maintenance activity from specialized maintenance personnel to machine operators. 

             One of the most common cause of machine breakdowns in inadequate preve-ntive maintenance. The primary reason for inadequate preventive maintenance is due to the fact that preventive maintenance is generally assigned to specialized mainten-ance crews. As a result of which routine preventive maintenance gets neglected, ultimately leading to more frequent break-downs. This problem can be solved to a large extent by training the machine operat -ors to perform some of their own mainte-nance , especially preventive maintenance. This strategy is referred as total produc-tive maintenance. 

TPM involves everyone, from top execut-ives to shop-floor workers to promote the productive maintenance through the moral building management and small group act-ivities in an effort to maximize equipment efficiency. 

BATH TUB CURVE

                      Bath tub curve 

The general failure curve for commonly used electronic components is known as the bath tub curve due to its shape. It is generally the variation of failure rate of component with time. it can be considered as a summa-tion of three processes - An early failure pro-cess, A random failure process and A wear- out process.

During the initial stage of the product when it is new, it is more likely to fail. This period is termed as break-in period and failures are termed as infant or early failure. This high failure rate is due to design errors, manufacturing, defects or installation defects. This is the period of severe failure and debugging of these failure. These early failure can be minimized by improving production quality control , subjecting the parts to a proof test before they are" running in".

After passing through initial break-in period, failure occurs less frequently and eventually the failure rate reaches a constant value. The failure in this period are termed as service failure. These failure occurs randomly and do not follow any predictable pattern. The reason behind these failures are the random overloads or random flaws.

Finally, after a long time the material and the components began to deteriorated, as they have exceeded their service life. During this stage failure rate again accelerates and failures in this stage are appropriately term as wear-out failures.

ENGINEERING MECHANICS MCQ -: 05

 Q.1 A wound watch spring possesses energy stored in the form of ______ .

A. Potential energy 

C. Mechanical energy

C. Kinetic energy 

D. Mechanical potential energy

Ans-: D

Q.2 __________ of a body does not depend upon the angular velocity of the body.

A. Acceleration 

B. Moment of inertia 

C.  Kinetic energy 

D. Mass 

Ans-: B

Q.3 For a machine to be self-locking , its efficiency should be ______.

A. 100 %

B. More than 50 %

C. Less than 50 %

D. 85 %

Ans-: C

Q.4 The value of acceleration due to ______ at poles as compared to at equator is greater. 

A. Gravity 

B. Weight 

C. Latitude 

D. Direction 

Ans-: A

Q.5 The weight of an object would be ________ when it is placed at the centre of the earth. 

A. Maximum 

B. Zero

C. Minimum 

D. Unpredictable 

Ans-: C

Q.6 When a body falls freely under gravita-tional force,  it possesses 

A. Minimum weight

B. No weight 

C. Maximum weight 

D. No effect on weight 

Ans-: B

Q.7  A jet engine work on the principle of 

A. Conservation of energy 

B. Conservation of linear momentum 

C. Conservation of mass

D. None of the above 

Ans-: B

Q.8 Which law provide the defination of force?

A. First law of thermodynamics 

B. Law of energy conservation 

C. First law of motion

D. Law of moments

Ans-: C

Q.9 The angle of repose is always _________ to angle of friction. 

A. Equal 

B. Less than 

C. Greater than

D. Inversely proportional 

Ans-: A

Q.10 The greatest angle, at which a plane must be inclined to the horizontal, before the body lying on it just slides down known as ___. 

A. Angle of repose 

B. Angle of friction 

C. Coefficient of friction 

D. None of the above 

Ans-: A

ENGINEERING MECHANICS MCQ-: 04

 Q.1 In the simple harmonic motion , acceleration of a particle is proportional to the ______.

A. Velocity 

B. Direction 

C. Acceleration 

D. Displacement 

Ans-: D

Q.2 The value of the coefficient of restitution for  perfectly elastic bodies is _____.

A. 0.5 

B. 2.5

C. 1.0

D. 0

Ans-: C

Q.3 The rate of change of momentum is proportional to the ______.

A. Acceleration 

B. Impressed force 

C. Velocity 

D. All of the above 

Ans-: B

Q.4 The unit of momentum are same as of the ____.

A. Energy 

B. Impulse 

C. Force 

D. Work

Ans-: B

Q.5 If the momentum of a given body is doubled, it's kinetic energy will ______.

A. Increase by 4 times

B. Remain same

C. Reduce to one fourth 

D. Increase by 3 times 

Ans-: A

Q.6 One joule is equal to _____ erg.

A. 10 ^7 

B. 10 ^4

C. 10 ^5

D. 10 ^2

Ans-: A

Q.7 Lighter body will have smaller momen-tum, if a light body and a heavy body have _______ kinetic energy of translation. 

A. More

B. Less

C. Equal 

D. Variable 

Ans-: C

Q.8 Force × time =_____ .

A. Work

B. Power

C. Energy 

D. Impulse 

Ans-: D

Q.9 Mass × velocity = _______.

A. Weight 

B. Load

C. Momentum 

D. Speed

Ans-: C

Q.10 Joule is the unit of _____.

A. Energy 

B. Work

C. Power

D. Frequency 

Ans-: B

ENGINEERING MECHANICS MCQ-:03

 Q.1 The example of lever of first order is __.

A. Pair of clinical tongs

B. Pair of scissors

C. Arm of man

D. All of the above 

Ans-: D

Q.2 In actual machines the mechanical advantage is _______ velocity ratio.

A. More than

B. Less than

C. Equal to velocity ratio

D. Zero

Ans-: B

Q.3 Tension in a string is maximum at ____.

A. Mid way

B. Right support 

C. Left support 

D. Quarter span

Ans-: A

Q.4 In ideal machine the mechanical advantage is _______ velocity ratio .

A. More than 

B. Zero

C. Equal to  

D. Less than 

Ans-: C

Q.5 A pair of Smith's tongs is an example of the lever of _______.

A. Second order

B. First order

C. Fourth order

D. Third order

Ans-: A

Q.6 The product of mass and velocity is known as _______.

A. Work

B. Impulse 

C. Momentum 

D. Power

Ans-: C

Q.7 The sum of kinetic and potential energies will be maximum at ______ , when a ball is thrown up.

A. Highest point

B. Ground 

C. In the centre while going up

D. At all the points 

Ans-: D

Q.8 The capacity of doing work is known as ___. 

A. Power

B. Energy 

C. Momentum 

D. Work

Ans-: B

Q.9 One Newton is equal to _____.

A. 10 ^7 dyne

B. 10 ^5 dyne

C. 10 ^3 dyne

D. 10 ^4 dyne 

Ans-: A

Q.10 The rate of doing work is known as ___. 

A. Energy 

B. Force 

C. Power 

D. Acceleration 

Ans-: C