IAS TOPPERS ANSWERS

IAS TOPPERS ANSWERS

“In the arena of human life the honors and rewards fall to those

Who show their good qualities in action.”

Q. how can you drop a raw egg onto a concrete floor without cracking it?

A. concrete floors are very hard to crack!(UPSC Topper)

Q. If it took eight men ten hours to build a wall, how long would it takes four men to build it?

A. No times at all it is already built.(UPSC 23 Rank opted for IFS)

Q. If you had three apples and four oranges in one hand and four apples and three oranges

     In the other hand, what would you have?

A. Very large hands.(good one) (UPSC 11 Rank opted for IFS)

Q. How can you lift an elephant with one hand?

A. It is not a problem, since you will never find an elephant with one hand.

Q. How can a man go eight days without sleep?

A. No problem, he sleeps at night.(UPSC IAS Rank 98)

Q. If you throw red stone into the blue sea what it will become?

A. It will wet or sink as simple as that.

Q. What look like half apple?

A. The other half. (UPSC-IAS Topper)

Q. What can you never eat for breakfast?

A. Dinner.

Q. What happened when wheel was invented?

A. it caused a revolution.

Q. Bay of Bengal is in which state?

A. Liquid (UPSC 33Rank)

Below are the interview questions, which were asked in HR round….

No One Will GET second chance to impress….

Very Very impressive Questions And Answers….

Questions 1:

You are driving along in your car on a wild, stormy night, it’s raining heavily, when suddenly you pass by a bus stop, and you see three people waiting for a bus: an old lady who looks as if she is about to die.an old friend who once saved your life. The perfect partner you have been dreaming about. Which one would you choose to offer a ride to, knowing very well that there could only be one passenger in your car? This is a moral/ethical dilemma that was once actually used as part of job application.

* You could pick up the old lady, because she is going to die, and thus you should save her first;

* Or you could take the old friend because he once saved your life, and this would be the perfect chance                to! Pay him back.

*However, you may never be able to find your perfect mate again. The candidate who was hired (out of 200 applicants) had no trouble coming up with his answer. guess what was his answer?

He simply answered:

“I would the car keys to my old friend and let him take the lady to the hospital.

I would stay behind and wait for the bus with the perfect partner of my dreams.” Sometimes, we gain more if we are able to give up our suborn thought limitations. Never forget to “THINK OUTSIDE OF THE BOX.”

Question 2:

What will you do if I run away with your sister? The candidate who was selected answered “I will not get a better match for my sister than you sir”

Question 3:

Interviewer (to a student girl candidate) – what is one morning you woke up & found that you were pregnant. Girl – I will be very excited and take an off, to celebrate with my husband. Normally an unmarried girl will be shocked to hear this, but she managed it well. Why I should think it in the wrong way, she said later when asked

 Question 4:

Interviewer: He ordered a cup of coffee for the candidate. Coffee arrived kept before the candidate, Then he asked what is before you? Candidate: instantly replied “Tea” he got selected. You know how and why did he say “Tea” when he knows very well that coffee was kept before. (Answer: the question was what is before you (U - alphabet) reply was “Tea” (T - alphabet) Alphabet “T” was before “U”

Question 5:

Where lord Rama would have celebrated his “First Diwali”? People will start thinking of Ayodya, Mitila (Janaki’s place), Lanka etc… but the logic is, Diwali was a celebrated as a mark of lord Krishna killing Narakasura. In Dusavataar, Krishnavataar comes after Raamavataar. So lord Rama would not have celebrated the Diwali at all!

Question 6:

The interviewer asked to the candidate “this is your last question of the interviewer. Please tell me the exact position of the center of this table where you have kept your files.”

Candidate confidently put one of his finger at some point at the table and told that this was the central point at the table. Interviewer asked how did you get to know that this being the central point of this table, then he answers quickly that “sir you are not likely to ask any more question, as it was the last question that you promise to ask….” And hence, he was selected as because of his quick-wittedness…..

This is what interviewer expects from the interviewee….

                                                                             “THINK OUT OF BOX”

an Engineer

Life of an Engineer

Engineers are people who solve problems and focus on making things work more efficiently and effectively. Engineers apply the theories and principles of science and mathematics to research and develop economical solutions to technical problems. Their work is the link between perceived social needs and commercial applications.

Important Reference Books for Gate (Mechanical Engineering)

 Reference Books for Gate
Dear GATE Aspirant here i am sharing Gate Reference Books for all branches such as CE(civil engineering), EE(electrical engineering), ECE(Electronics and communication engineering),cs-it(Computer science information technology engineering),Me(mechanical engineering),CH(chemical engineering),IN(instrumentation).

Some of the best books mentioned in below links. GATE exam aspirant should prefer it for GATE 2015. These books cover all the elementary fundamentals needed for exam. All topics are described clearly,deeply and easy to understand for the students who prepare for the gate exam.

Mechanical Engineering

Mechanical Engineering is a diverse subject that derives its breadth from the need to design, manufacture, test and sell everything from small individual parts and devices (e.g., nano materials, microscale sensors and inkjet printer nozzles etc.,) to large systems (e.g., high speed trains, ships, trucks and spacecrafts etc.,). Mechanical engineering is one industry without whose products, production in other industries would simply be impossible. The auto, aircraft, electric and electronics industries, to name a few, all need the products that are of the machines, of the mechanical engineering industry.

Preparation Strategy for GATE Exam

The Graduate Aptitude Test in Engineering (GATE) is conducted by the seven IITs (Indian Institute of Technology) and IISc (Indian Institute of Science), Bengaluru. It is an all India examination for admission to Master's program in engineering in the best engineering colleges and institutes in the country.

GATE is held to assess the potential of undergraduate engineering students, to pursue higher education in engineering. It is an evaluative test to determine the possession of skills by students and aptitude for engineering for further studies. Indian Institute of Technology Delhi is the Organising Institute for GATE 2012.

GOAPS

GATE Online Application Processing System (GOAPS)

 An online interface is provided for most of applicant’s interaction with the GATE office. With this interface an applicant can

1. Do Enrolment using “New User Register here”
2. Fill the online application form
3. Upload photograph and signature.
4. Pay the application fee through net-banking or indicate your option for payment through bank challan (State Bank of India or Syndicate Bank).
5. Check the Status of your application form: Received, Under Scrutiny, Accepted, Defect Status, Status after Rectification, Rejected with Valid Reasons, Admit Card Ready for Download, etc.
6. Contact the Zonal GATE office in case of any queries/problems.
7. Download Admit Card.
8. View your responses, marks and GATE score.

The login to this interface is through your GOAPS Enrolment ID and a GOAPS password. Length of the password should be 8 -15 characters. Please note that \a, \b, \n, \r, \t, \\ are not permitted in the password. Keep this information safe and do not disclose it to anyone.

GATE syllabus for ME

Syllabus for Mechanical Engineering (ME)

Graduate Aptitude Test in Engineering (GATE) is an all India examination that primarily tests the comprehensive understanding of various undergraduate subjects in Engineering and Technology. The GATE score of a candidate reflects a relative performance of a candidate. The score is used for admissions to post-graduate engineering programmes (eg. M.E., M.Tech, direct Ph.D.) in Indian higher education institutes with financial assistance provided by MHRD and other Government agencies.  The score may also used by Public sector units for employment screening purposes.

HEAT TRANSFER

Heat transfer ...you are getting warmer...!
Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy and heat between physical systems. As such, heat transfer is involved in almost every sector of the economy.^[1] Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species, either cold or hot, to achieve heat transfer. While these mechanisms have distinct characteristics, they often occur simultaneously in the same system.
Heat conduction, also called diffusion, is the direct microscopic exchange of kinetic energy of particles through the boundary between two systems. When an object is at a different temperature from another body or its surroundings, heat flows so that the body and the surroundings reach the same temperature, at which point they are in thermal equilibrium. Such spontaneous heat transfer always occurs from a region of high temperature to another region of lower temperature, as described by the second law of thermodynamics.
Heat convection occurs when bulk flow of a fluid (gas or liquid) carries heat along with the flow of matter in the fluid. The flow of fluid may be forced by external processes, or sometimes (in gravitational fields) by buoyancy forces caused when thermal energy expands the fluid (for example in a fire plume), thus influencing its own transfer. The latter process is often called "natural convection". All convective processes also move heat partly by diffusion, as well. Another form of convection is forced convection. In this case the fluid is forced to flow by use of a pump, fan or other mechanical means.

Note to Teachers

•  Heat and temperature are among the most misunderstood concepts in science.
•  Temperature is a physical state, based on the molecular activity of an object. If you cut an object in half, each half will have the same temperature.
•  Heat is a transfer of energy, which might change the state of temperature. Heat can be transferred without a change in temperature during a phase change (latent heat)
•  There is no such concept as the amount of heat IN an object – heat is an energy transfer

ü Did you know that HEAT is a form of ENERGY? Yep, this form of energy
affects everything from fuel to all of the parts in a racecar. And, we're going
to look at a few experiments to learn how this form of energy acts and why we
need to know all about it. Benjamin Thompson (1753 - 1814), known in Europe
as "Count Rumford", was the first person to show that HEAT is a form of ENERGY

The heat energy of a substance is determined by how active its atoms and molecules are. A hot object is one whose atoms and molecules are excited and show rapid movement. A cooler object's molecules and atoms will be less excited and show less movement. When these guys are in the excited state, they take up a lot of space because they're moving around so fast. When the atoms and molecules settle down, or cool down, they take up less space.

If a HOT high-energy atom comes into contact with a cool low-energy atom, the excited atom will loose some of its energy to the cool atom. The two atoms will settle into an energy level that's between where they each started out. That level is called Thermal Equilibrium. Did you know a lot of racecar drivers will let their engines cool down while idling before shutting it off after a hard race? They do this to let all of the internal engine parts come to Thermal Equilibrium.

Now that you have an idea of what heat is, let's look at some of the effects this form of energy. Here's another Experiment. Blow up a balloon, but not all the way. Measure its circumference with a tape measure. Put the balloon in a refrigerator for about an hour, then take it out and measure it again. Did it shrink? Why?

It shrank because the air molecules inside the balloon slowed down and are taking up less space. Now put the balloon in direct sunlight. What happened after it warmed up? Why?

What do you think happens to all of the parts inside of an engine when they heat up?

From the above experiment, we learned a very important fact - heat causes things to "grow". We call this Thermal Expansion. If things "grow" when heated, what do you think happens to them when they get cold?
If you get a chance to check out some railroad tracks, notice the gaps between the rails. (Don't get run over by a train!). Thermal expansion and contraction is why those gaps are intentionally placed there, and why expansion joints are place in long highway bridges. You've probably felt expansion joints on old concrete highways. Remember the "thump - thump" sound as you rode over them?
Most materials expand (grow) and contract (shrink) when heated or cooled. Water is most dense at 4° C. When it gets colder than that, it actually expands! Expansion and contraction occur in all directions but they can be broken down into the following categories: Linear Expansion, for objects such as connecting rods.  Area Expansion, for objects such as pistons.  Volume Expansion, for substances such as fuel in a fuel cell.
Another example of linear expansion is shown by the illustration directly above. Say a steel pushrod starts out cold in the morning at 32° Fahrenheit (T1). The engine warms up to 200° Fahrenheit; a difference (what engineers call Delta T) of 168 degrees. Each inch of the pushrod will expand a certain amount for every degree of temperature rise. This amount is known as the coefficient of linear expansion. Each material has it own unique "coefficient". For example, Aluminum has about twice the expansion rate as mild steel. Now you can see why engine builders need to know their stuff. They have to know how much clearance to build into engine assemblies to allow for thermal expansion and contraction!
	It's extremely important to understand material expansion due to the heat that occurs in many areas of an internal combustion engine. One measurement that is critical is the piston-to-wall clearance. This is the difference between the diameter of the piston and the diameter of the cylinder wall. Engine builders must know how much certain materials will expand when heated. For example, if an engine block is cast iron and a piston is aluminum, the piston and cylinder will expand differently. If the block and piston are made of the same material, the piston-to-wall clearance will expand at the same rate and the clearances will be different.
Another example of linear expansion can be found in piston-ring end gap. This is the space between the ends of a piston ring when installed in the cylinder. The ring undergoes linear expansion as the engine heats up, which causes the end gap to get smaller (the ring tries to grow together as it gets hot). If there is not enough end gap when the engine is put together, the ends of the ring may butt together when the engine gets hot and this could seriously damage the engine.
	Racecars use different fuels such as gasoline, nitromethane and alcohol. These fuels produce different amounts of heat (and power) when burned. Scientists use test devices such as the calorimeter to measure how much heat a particular fuel will produce. How the calorimeter works: Water flows through a calorimeter at a certain rate (for example, 1 gallon per minute). A measured amount of fuel is burned and gives up its heat to the water. The water temperature is measured as it enters and leaves the calorimeter. The difference in temperature is the amount of heat contained in the fuel.
Did you know that the alcohol used in race engines has only about half the heat energy as gasoline for a given amount? This is why engines burning alcohol must run bigger jets in the carburetor than those for gasoline engines.	Did you also know that diesel fuel has more heat energy than gasoline? Another fact about diesel fuel is that it burns slower than gasoline. We'll investigate this further in another lesson.
The table at the right shows the "air/fuel ratios" required for engines using these types of fuels. You will learn more about this in another lesson.	Fuel Type Air/ Fuel Ratio Gasoline 14.6:1 Methanol (a form of alcohol) 6.46:1 Ethanol (a form of alcohol) 8.94:1
Heat Transfer Heat travels from a hot object to a cold object. You might say that heat flows down a temperature hill. So how does heat travel from one object to another? By Conduction, Convection and Radiation.
	Liquids and gases do not conduct heat very well, but they can transfer heat by CONVECTION. Look at the engine at the left. Water carries heat from a hot engine through a pump and delivers it to a radiator, whose duty is to give up heat to the air. Remember, with convection, heat is transferred from one place to another by the motion of the gas or liquid. CONDUCTION is the main way for heat to transfer through solid materials. For example, the outside surface of an engine gets hot because heat energy is transferred from the combustion chamber through the metal to the outside surface.
All solid materials conduct heat, but some do a better job than others. Generally, metals are good conductors while porous materials are not. Styrofoam is an example of a poor conductor. It is a great insulator. Good conductors of electricity are usually good conductors of heat.
	The easiest way to explain heat transfer by RADIATION is by the heat we feel from the sun. Even though the sun is about 93 million miles away from the earth, we still feel some of its heat. It travels to earth through the vacuum (no air) of space by way of rays!
	If you hold your hand near a light bulb (but not too close!), much of the heat that you feel is from RADIATION. How else is the light bulb transferring heat to your hand. Would you guess CONVECTION or CONDUCTION?

Well, that's a quick look at HEAT ENERGY!  We'll cover some of the same material in the lessons on Thermodynamics, Temperature, Heat Transfer and the Properties of Materials. Talk to your teacher about how this subject applies to your racecar and what you can do to improve performance by applying the things you learned in this lesson. Remember, HEAT is what makes your racecar go!

Mechanical Engineering: Heat Transfer QUESTIONS AND ANSWERS::

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations:

1.The time constant of a thermocouple is

the time taken to attain the final temperature to be measured

the time taken to attain 50% of the value of initial temperature difference

the time taken to attain 63.2% of the value of initial temperature difference

determined by the time taken to reach 100�C from 0�C

None of the above.

ANSWER : : the time taken to attain 63.2% of the value of initial temperature difference

2.Thermal conductivity of water in general with rise in temperature

increases

decreases

remains constant

may increase or decrease depending on temperature

None of the above.

ANSWER : : may increase or decrease depending on temperature

3.Which of the following is the case of heat transfer by radiation

blast furnace

heating of building

cooling of parts in furnace

heat received by a person from fireplace

All of the above.

ANSWER : : heat received by a person from fireplace

4.Heat transfer takes place as per -

zeroth law of thermodynamics

first law of thermodynamic

second law of the thermodynamics

Kirchhoff law (e) Stefan's law.

opt 5

ANSWER : : second law of the thermodynamics

5.Thermal conductivity of air with rise in temperature

increases

decreases

remains constant

may increase or decrease depending on temperature

None of the above.

ANSWER : : increases

6.Thermal conductivity of air at room temperature in kcal/m hr �C is of the order of
0.002
0.02
0.01
0.1
0.5.
ANSWER : : 0.02

7.Thermal conductivity of water at 20�C is of the order of

0.1

0.23

0.42

0.51

0.64.

ANSWER : : 0.51

8.Temperature of steam at around 540�C can be measured by

thermometer

radiatiouv pyrometer

thermistor

thermocouple

Thermopile.

ANSWER : : thermocouple

9.Unit of thermal conductivity in S.I. units is

J/m2 sec

J/m �K sec

W/m �K

(a) and (c) above

(b) and (c) above.

ANSWER: (b) and (c) above.

10.Cork is a good insulator because it has

free electrons

atoms colliding frequency

low density

porous body

all of the above.

ANSWER : : porous body