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