APTITUDE TEST - 1

1 to 10 – One mark each:
1) N trains ply between Chennai and Hyderabad. A person can go from Chennai to Hyderabad by a train and return by a different train in a total of 210 ways. Find N.
a) 30 b) 28 c) 14 d) 15

2) Find the roots of equation y^2- 17y + 160 = 12y -8
a) -21,8 b) 21,8 c) -21,-8 d)21,-8

3) Barat wanted to find ( 13/17 )th of a number. By mistake he found ( 17/13 )th of it. A possible value of the excess of his result over the correct result is (the excess value obtained is an integer)
a) 60 b) 180 c) 240 d) None of these

4) Two unbiased dice were rolled together. Find the probability of the sum of the numbers on them being a two
digit prime number
a) 1/9 b) 1/12 c) 1/18 d) 1/6

5) A triangle whose vertices are ( -a, b ), (-b, -a) and (a,-b) must be
a) Isosceles b) isosceles and right angled c) equilateral d) right angled

6) A five digit number is formed by using the digits 1,2,3,4 and 5 without repetitions. What is probability that the number is divisible by 4?
a) 1/5 b) 5/6 c) 4/5 d) none of these

7) If the eight digit number N = 635a432b is divisible by 36, Find the number of possible values of N
a) 2 b) 3 c) 5 d) none of these

8) For which of the following ranges of x, is the inequality
{x( x+1 )(x + 3)/( x-4 )}>0, necessarily false
a) -3 < x < -1 b) -1 < x < 0 c) x> 4 d) -3< x < 0

9) a, b, and c are 3 real numbers satisfying the following conditions.
a+b+c=8, a^2+b^2+c^2= 38. Find ( ab + bc + ca ).
a) 13 b) -1 c) -13 d) 1

10) If a + b = 30 and ab = 176 , find a^3+b^3=?
a) 10160 b) 11060 c) 11160 d) none of the above

11 to 20 , each carry 2 mark:

11) In a class , there are 50 students among them, 38 students like at most one of chess and carom and 32students like at least one of chess and carom. Find the number of students who like exactly one of these two games.
a) 15 b) 25 c)30 d)20

12)In a certain university , there were eight foreign nationals. At the end of their stay at the university they decided to have a photograph. 3 of them were Kenyans, 4 of them Zambians, 1 of them was Ethiopian. Students of the same country decided to stand together for the photograph, which had all students in a single row. In how
many different ways could they have stood for it?
a) 864 b)768 c)576 d)648

13) Padma borrowed a sum at 4.5% p. a simple interest. She managed to repay it in two years and 4 months. If the amount she repaid was Rs 3,97,800 , find the sum ( in Rs Lakh) she borrowed.
a) 3.75 b) 3.6 c) 3.45 d) 3.3

14) A cube of 3 m edge was cut into small cubes with each smaller cube having an edge of 60 cm. If it was cut into small cubes with each having an edge of 50 cm instead, how many more small cubes would have been formed?
a) 91 b) 87 c) 93 d) 97

15) (p^5)=(q^4)=(r^3)=(s^2)=t
Find log( pqrs / t) {the base of log is t}
a) 17/60 b) 23/60 c)43/60 d)7/60

Answers for 16 to 20 based on the information given below:

In a zoo, 12 animals, Elephant, wolf, deer , bear , gorilla, Tiger, Antelope, Giraffe, Lion, Chimpanzee,Horse and zebra are locked in 12 different cages from
1 to 12(not necessarily in that order. These cages are on either side of a path. Cages 1 to 6 are on the left side of the path and cages 7 to 12 are on the
rightside of the path. Cage 1 is opposite cage 7, cage 2 is opposite cage 8 and
so on. The arrangement of the animals is as follows.
1) The elephant is in the cage 1 and is diagonally opposite the wolf which is opposite to the chimpanzee.
2) The bear is opposite the giraffe which is exactly in between the gorilla and the Antelope.
3) The deer is opposite the lion which is exactly in between the wolf and the tiger.
4) The horse is diagonally opposite the chimpanzee.

16) If the tiger is not opposite the gorilla, then which animal is adjacent to the elephant?
a) Antelope b) horse c) gorilla d) deer

17) In how many ways can the animals be arranged in the cage?
a) One b) two c) three d) four

18) Which animal is exactly in between the giraffe and the deer?
a) Antelope b) Giraffe c) Gorilla d) cannot be determined

19) If zebra is opposite Antelope, then which animal is between Gorilla and chimpanzee?
a) Antelope b) lion c) deer d) cannot be determined
20) The animal in between bear and lion is
a) Zebra b) deer c) tiger d) none of these

VERBAL SECTION:

21 to 30 Each one mark:
21) Potentate is to monarch as quisling is to
a) sybarite b) panhandler c)renegade d)pagan

22) Find the odd one out
a) Quisling – jingoistic b)aficionado—disinterested c)Charlatan—honest
d)stoic—equanimous

23) Find the odd one out
a) Labyrinthine – maze b)asinine – moron
c) supple – convertible d)opprobrious –invective

24) Select the idiom which means: “deeply affected and upset by something”
a) take heart b) heart and soul
c) wear your heart on your sleeve d) take it to heart

25) The meaning of the idiom: ” let the genie out of the bottle “
a) make known a secret, without realizing what you are doing
b) to act according to what you feel rather than what is sensible
c) to allow something bad to happen which cannot then be stopped
d) none of these

26) Pick the option where the word GOODNESS is incorrect or inappropriate
a) For goodness' sake, stop fighting!
b) His essential goodness makes people want to help him.
c) This restaurant is going to remain closed for goodness knows how long.
d) Every body acknowledges the goodness in milk

27 to 30 ) Find the synonyms:

27)TO DISPEL
a) to dissipate b) to dissent c) to distort d) to disfigure

28) ACUMEN
a) exactness b) potential c) shrewdness d) bluntness

LOOK in AeRo MOdeLLerS

This is a simple software tool to calculate the various design parameters of a rc model. just by giving small specifications.. hope you find it intresting

http://www.motocalc.com/motodown.htm

with regards,
Aviator.

FMEA

A failure modes and effects analysis (FMEA), is a procedure in product development and operations management for analysis of potential failure modes within a system for classification by the severity and likelihood of the failures. A successful FMEA activity helps a team to identify potential failure modes based on past experience with similar products or processes, enabling the team to design those failures out of the system with the minimum of effort and resource expenditure, thereby reducing development time and costs. It is widely used in manufacturing industries in various phases of the product life cycle and is now increasingly finding use in the service industry. Failure modes are any errors or defects in a process, design, or item, especially those that affect the customer, and can be potential or actual. Effects analysis refers to studying the consequences of those failures.

The Next Big thing?

edition-1
The memristor, a microscopic component that can "remember" electrical states even when turned off. It's expected to be far cheaper and faster than flash storage. A theoretical concept since 1971, it has now been built in labs and is already starting to revolutionize everything we know about computing, possibly making flash memory, RAM, and even hard drives obsolete within a decade.

The memristor is just one of the incredible technological advances sending shock waves through the world of computing. Other innovations in the works are more down-to-earth, but they also carry watershed significance. From the technologies that finally make paperless offices a reality to those that deliver wireless power, these advances should make your humble PC a far different beast come the turn of the decade.

In the following sections, we outline the basics of 15 upcoming technologies, with predictions on what may come of them. Some are breathing down our necks; some advances are still just out of reach. And all have to be reckoned with.

with regards,
Aviator

V speeds of an aircraft

The takeoff speed required varies with air density, aircraft gross weight, and aircraft configuration (flap and/or slat position, as applicable). Air density
is affected by factors such as field elevation and air temperature. This relationship between temperature, altitude, and air density can be expressed
as a density altitude, or the altitude in the International Standard Atmosphere
at which the air density would be equal to the actual air density.

Operations with transport category aircraft employ the concept of the takeoff
V-Speeds, V1, VR and V2. These speeds are determined not only by the above
factors affecting takeoff performance, but also by the length and slope of the runway and any peculiar conditions, such as obstacles off the end of the runway. Below V1, in case of critical failures, the takeoff should be aborted; above V1
the pilot continues the takeoff and returns for landing. After the co-pilot calls
V1, he/she will call Vr or "rotate," marking speed at which to rotate the aircraft. The VR for transport category aircraft is calculated such as to allow the aircraft to reach the regulatory screen height at V2 with one engine failed. Then, V2 (the safe takeoff speed) is called. This speed must be maintained after an engine failure to meet performance targets for rate of climb and angle of climb.

In a single-engine or light twin-engine aircraft, the pilot calculates the length of runway required to take off and clear any obstacles, to ensure sufficient runway to use for takeoff. A safety margin can be added to provide the option to stop on the runway in case of a rejected takeoff. In most such aircraft, any engine failure results in a rejected takeoff as a matter of course, since even overrunning the end of the runway is preferable to lifting off with insufficient power to maintain flight.

If an obstacle needs to be cleared, the pilot climbs at the speed for maximum climb angle (Vx), which results in the greatest altitude gain per unit of horizontal distance travelled. If no obstacle needs to be cleared, or after an obstacle is cleared, the pilot can accelerate to the best rate of climb speed (Vy), where the aircraft will gain the most altitude in the least amount of time. Generally speaking, Vx is a lower speed than Vy, and requires a higher pitch attitude to achieve.

FEEL THE DIFFERENCE :) FUNNY MOMENTS

No pollution :):):)

SINGAPORE: Singapore's first hydrogen-powered public bus will hit the streets next month.

It'll be the first such bus in Southeast Asia and promises to help save the environment.

Called GreenLite, it does not emit carbon and is "low" on noise.

It's powered by a battery system and fuel cell technology that "converts" hydrogen into electrical energy and creates pure water as a by-product.

The bus is jointly developed by researchers from Singapore's Nanyang Technological University (NTU) and China's Tsinghua University over seven months.

Professor and associate dean (research) at the College of Engineering in NTU, Soh Yeng Chai, says: "This is a new concept in the sense that the standard fuel cell bus uses about 80 to 100 kW (kilowatt), whereas ours is only 40 kW.

"The whole idea is that we want to use the concept of combining hydrogen and battery system to co-power the bus. So under normal conditions, the fuel cell stack is strong enough to power the bus, and at the same time charges the battery. But in high-load conditions, we need to use both the hydrogen and the battery to power the bus.

Such eco-friendly technologies don't come cheap.

Hydrogen costs six times more than diesel.

Prof Soh says: "Currently to run 100 kilometres, we need about 10 kilograms of hydrogen; that translates to about $300."

Still, SBS Transit will be testing out this fuel cell bus, as well as a hybrid bus that runs on both diesel and electricity.

It has trained eight bus captains to operate these buses.

Gan Juay Kiat, CEO, SBS Transit, says: "We're in the early stages of this trial, and we have to consider the capital cost and the operation and maintenance costs of the bus. That's why we're embarking on this trial to understand it more before we make a decision, going forward as to having more hybrid buses in the fleet."

--
With
Regards
Aviator.