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Basic Computer Terms | Important for Competitive Exams

Basic Computer Terms

Basic Computer Terms

Hardware:

The physical parts of a computer –

CPU:
Central processing unit; the brain of the computer; controls the other elements of the computer

Disk Drive:
A peripheral device that reads and/or writes information on a disk

Hard Drive:
A device (usually within the computer case) that reads and writes information, including the operating system, program files, and data files

Keyboard:
A peripheral used to input data by pressing keys

Modem:
A peripheral device used to connect one computer to another over a phone line

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Key Global Warming Terms | Important for Competitive Exams

Key Global Warming Terms, Important for Competitive Exams

Key Global Warming Terms
Important for Competitive Exams

Carbon Dioxide (CO2)

The chemical compound carbon dioxide (also known by its shorthand CO2) is the primary greenhouse gas and driver of climate change.

Greenhouse Gas

A greenhouse gas is a chemical compound found in the Earth’s atmosphere, such as carbon dioxide, methane, water vapor and other human-made gases.

Emissions

In the climate change space, emissions refer to greenhouse gases released into the air that are produced by numerous activities, including burning fossil fuels, industrial agriculture and melting permafrost, to name a few. These gases cause heat to be trapped in the atmosphere, slowly increasing the Earth’s temperature over time.

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Scientific Explanations | Material for all Competitive Exams

Scientific Explanations | Material for all Competitive Exams

Scientific Explanations | Material for all Competitive Exams

Why it is dangerous to sleep in an unventilated room with fire burning?
▪ It is dangerous to sleep in an unventilated room with fire burning inside because the fire produces carbon monoxide and carbon dioxide gases. Carbon monoxide is poisonous and can cause death.

Alcohol is sometimes rubbed on the body of a person suffering from fever
▪ As soon as Alcohol is applied on the body, it evaporates taking away some heat from the body. Since evaporation has a cooling effect, the body temperature can be reduced by rubbing alcohol.

Why people used filament of an electric bulb of tungsten?
▪ The filament of an electric bulb is made of tungsten because it has a high melting point and can be heated to a high temperature to emit light.

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English Grammar English Notes World General Knowledge

Important Idioms and Phrases for All Competitive Exams

Important Idioms & Phrases for All Competitive Exams

Important Idioms and Phrases [Starts with “B”]

Back out — to withdraw from a promise, contract : I felt grieved when he backed out of his promise to help me.

Back up — to support; to sustain : He backed up his report with relevant statistics.

Bear upon — to be relevant to : This argument does not bear upon the subject under discussion.

Blow up — to explode : The mine blew up and all the labourers working inside were killed.

— to reprimand or scold : If you continue to be negligent, the teacher will blow you up.

Break down — of a car; a piece of machinery; to go wrong so that it will not function : The car broke down on our way to Mumbai.

— to collapse; to succumb to uncontrollable weeping : She broke down completely on hearing the news of her husband’s death.

— to succumb to a nervous collapse through overwork or worry : He worked so hard that his health broke down near the examination.

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English Grammar English Notes World General Knowledge

Famous English Characters and Their Creators

Famous English Characters and Their Creators

Famous English Characters and Their Creators

Adam: John Milton

Alice: Lewis Carroll

Ancient Mariner: S.T. Coleridge

Anna Karenina: Leo Tolstoy

Antonio: William Shakespeare

Ariel: William Shakespeare

Bassano: William Shakespeare

Beatrice: William Shakespeare

Beatrix: William M. Thackeray

Bertie Wooster: P.G. Wodehouse

Brutus: William ‘Shakespeare

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5 Worst Accidents in NASA’s History

5 Worst Accidents in NASA's History

5 Worst Accidents in NASA’s History

Wallops Island – Aug. 22, 2008

NASA destroys an unmanned experimental rocket launched from Wallops Island, Virginia, carrying a pair of research satellites after it veers off course. Officials said the rocket – a prototype made by Alliant Techsystems Inc., or ATK – was destroyed by remote control 27 seconds into the pre-dawn flight. It was between 11,000 feet and 12,000 feet high when it exploded. Officials said they do not know why it veered off course. It was destroyed to avoid endangering the public.

Columbia – Feb. 1, 2003

Recovered power-head of one of Columbia's main engines
Recovered power-head of one of Columbia’s main engines

The Columbia shuttle, which had a wing damaged during launch, breaks apart in the Texas skies during re-entry, killing seven astronauts and raining debris over Texas and Louisiana. Investigators determined its left wing was gashed by fuel-tank foam insulation during liftoff, allowing fiery gases to penetrate the shuttle.

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Top 10 Key Space Missions | World General Knowledge Series

World General Knowledge Series

Top 10 Key Space Missions | World General Knowledge Series

Since Russia’s Sputnik 1 satellite entered space on 4 October 1957, thousands of spacecraft – including Earth satellites and deep-space probes – have launched into the cosmos.

Over the last 6 decades, space travel has come on leaps and bounds, with the development of liquid and solid fuels and the use of solar panels and radioactive power sources among many of the impressive innovations, allowing space agencies across the planet to undertake evermore ambitious missions that would once have never been thought possible.

Ten key missions that have advanced the field of space travel to a whole new level are:

Pioneer 10 and 11 (1972 – 2003)

Top 10 Key Space Missions World General Knowledge Series

  • The purpose of NASA’s Pioneer missions was to learn about the outer reaches of the Solar System.
  • These two spacecraft were, at the time of their launch, the most scientifically advanced vehicles to venture into the Solar System.
  • They contained a number of technical instruments that had never been used in space before, which included a charged particle instrument to measure the extent of the Sun’s influence as they travelled towards the edge of the Solar System, and an ultraviolet photometer to determine the composition of Jupiter’s atmosphere.
  • While communication was lost in 2003 (Pioneer 10) and 1995 (Pioneer 11), the probes continue to make their way out of the Solar System, with each possessing an on board plaque detailing the origins of the spacecraft lest they are ever discovered by intelligent life-forms from another world.
  • The Pioneer spacecraft were Earth’s first deep space probes, and held the record for being the furthest man made objects from Earth until they were overtaken by the Voyager probes in the 1990s.
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General Ability & Math MCQs GK MCQ’s MCQs World General Knowledge

Important Questions for Basic Math & I.Q (MCQs)

Important Questions for Basic Math & I.Q (MCQs)

Important Questions for Basic Math & I.Q (MCQs)

1. In decreasing price of a motor bike by 10% number of bikes sold is increased by 10%. What is the change in overall sales?
(a) Increases
(b) decreases
(c) remains same
(d) may increase or may decrease

2. The radius of circle is increased by 20% its area is increased by:
(a) 44%
(b) 40%
(c) 20%
(d) no change

3. A 30-ounce solution is 25% alcohol. If 60-ounces of water are added to it what percent of the new solution is alcohol?
(a) 8%
(b) 8.33%
(c) 8.35%
(d) 8.50%

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Famous Muslim Scientists | World General Knowledge Series

Muslim Scientists

Famous Muslim Scientists | World General Knowledge Series

Abu Ali Sina or Avicenna 980 – June 1037

            Abu Ali al-Hussain Ibn Abdallah Ibn Sina was a Persian physician and philosopher. He was born in 980 A.D. at Afshana near Bukhara (in present-day Uzbekistan) then capital of the Samanid Dynasty. He was an encyclopeadist, philosopher, physiologist, physician, mathematician, astronomer, logi1cian and poet. He gained the titles of Shaikh al-Ra’is (leader among the wise men) and Hujjat al-Haq (proof of God), displayed a remarkable aptitude for learning from an early age.

Contributions and Achievements

  • His most important medical works are the Qanun (Canon) and a treatise on cardiac drugs (hitherto unpublished) Qanun contains many examples of good observation – distinction of mediastinitis from pleurisy; contagious nature of phthitis; distribution of diseases by soil and water; careful description of skin troubles, of sexual diseases; and supervisions; of nervous ailments (including love sickness); many psychological and pathological facts clearly analyzed if badly explained.
  • Sina’s interest in mathematics was philosophical rather than technical and such as we would expect in a late Neoplatonist. He explained the casting out of nines and its application to the verification of square and cubes. Many of his writings were devoted to mathematical and astronomical subjects.
  • He composed a translation on Euclid.
  • He made astronomical observations, and devised a contrivance the purpose of which was similar to that of the vernier, that is, to increase the precision of instrumental readings.
  • He made a profound study of various physical questions – motion, contact, force, vacuum, infinity, light, and heat. He observed that if the perception of light is due to the emission of some sort of particles by the luminous source, and speed of light must be finite.
  • He made investigations on specific gravity.
  • He did not believe the possibility of chemical transmutation, because in his opinion the differences of the metals were not superficial, but much deeper; coloring or bronzing the metals does not affect their essence.
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Branches of Science | World General Knowledge

Branches of Science - World General Knowledge Series

Branches of Science | World General Knowledge

Acoustics

  • This science is the study of mechanical waves in solids, liquids and gases.

Accounting

  • This is the study of financial information about a business entity that is communicated to its shareholders.

Aerodynamics

  • This is the study of forces of air acting on objects in motion relative to air.

Aeronautical Engineering

  • This field is the study of the design and manufacture of flight-capable machines and techniques.
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