Static General Knowledge makes up the rest of the General Awareness section in RRB NTPC, and the notices name its topics: General Science and Life Science up to Class 10, History of India and the freedom struggle, Physical, Social and Economic Geography of India and the world, Indian Polity and Governance, Indian Economy, Art and Culture, Indian Literature, Monuments and Places, Flora and Fauna, Famous Personalities, the UN and other world organisations, environmental issues, Transport Systems in India, Important Government and Public Sector Organisations, Common Abbreviations, and Basics of Computers and Computer Applications. RRB frames these as short factual questions: the unit of a physical quantity, the year of a battle, the article of the Constitution, the river a city stands on, the full form of an abbreviation, the headquarters of an organisation. GK24's GK notes on this page cover each topic in English and Hindi, arranged the way the syllabus lists them, with the facts RRB tends to ask placed first. Work through one topic at a time, note the lists (national parks, dances, articles, schedules, awards), and pair each topic with its quiz on GK24 to check what has stayed with you.
What is the velocity ratio of a single fixed pulley?
In a single fixed pulley the rope that is pulled down moves exactly as far as the load rises, so the distance moved by the effort equals the distance moved by the load and the velocity ratio is one; the pulley gives no gain in force and is used only…
Read the full explanation →A pair of forceps or sugar tongs is an example of which class of lever?
In a pair of tongs the joint is the fulcrum, the hand presses somewhere in the middle of the arms and the object held lies at the far end, so the effort is between the fulcrum and the load; the effort arm is shorter than the load arm, the mechanical…
Read the full explanation →A wheelbarrow is an example of which class of lever?
In a wheelbarrow the wheel acts as the fulcrum, the load sits in the tray between the wheel and the hands, and the effort is applied at the handles, which is the arrangement of a second class lever; because the effort arm is always longer than the load arm, its…
Read the full explanation →Which of the following mechanical devices efficiently distributes or multiplies loads with little effort?
A lever is a rigid bar turning about a fulcrum, and by the principle of moments the load multiplied by the load arm equals the effort multiplied by the effort arm, so a long effort arm lets a small effort balance a large load; this is the simplest way of…
Read the full explanation →The velocity ratio of a simple machine is the ratio of distance travelled by the ________ to the distance travelled by the ________ in the machine.
Velocity ratio is defined as the distance moved by the effort divided by the distance moved by the load in the same interval of time, and because it depends only on the design of the machine it does not change with friction, unlike the mechanical advantage.
Read the full explanation →Find the efficiency of a pulley system which has a mechanical advantage of 2.5 and where the load lifts by 2.5 metres on pulling the rope by 10 m.
The velocity ratio is the distance moved by the effort divided by the distance moved by the load, that is ten divided by two point five, which is four.
Read the full explanation →The effort applied to move a load is 15 units and the mechanical advantage is observed to be 3. Find the load.
Mechanical advantage is defined as the load divided by the effort, so the load is the mechanical advantage multiplied by the effort, that is three multiplied by fifteen, which gives forty-five units.
Read the full explanation →Who among the following was the founder of the 'Self-Respect Movement'?
Periyar launched the Self-Respect Movement in the Madras Presidency in 1925 to fight caste discrimination and Brahmin dominance. Periyar had left the Congress after he felt it did little for non-Brahmins.
Read the full explanation →Under which of the following Articles of the Constitution of India, has the Supreme Court of India placed the Right to Privacy ?
The Supreme Court held that privacy is an intrinsic part of the right to life and personal liberty guaranteed by Article 21.
Read the full explanation →Which one of the following is the correct combination of languages included in the 8th Schedule of the Constitution of India?
All four are among the 22 languages listed in the Eighth Schedule. The Eighth Schedule began with 14 languages in 1950, Urdu among them.
Read the full explanation →Which one of the following statements is NOT correct?
Chaparral is the shrub vegetation of the Mediterranean climate in California, not of the cold Taiga, so this statement is incorrect.
Read the full explanation →Which of the following factors are needed for the growth of corals? 1. Freshwater 2. Clear shallow salt water 3. Plenty of sunlight for photosynthesis 4. Warm water between 23 °C and 25 °C Select the correct answer using the code given below.
Corals grow in clear, shallow, warm sea water with plenty of sunlight; fresh water kills them. Coral reefs are built by tiny animals called polyps, which take calcium carbonate from sea water to make hard skeletons.
Read the full explanation →In India, Cardamom Hills are regarded as a continuation of the
The Cardamom Hills form the southernmost part of the Western Ghats, lying south of the Palghat Gap along the Kerala–Tamil Nadu border.
Read the full explanation →Which one among the following statements is not correct?
Methane and chlorine react in sunlight to give chloromethane and hydrogen chloride, not hydrogen gas. This is a substitution reaction: CH4 + Cl2 → CH3Cl + HCl in the presence of sunlight.
Read the full explanation →Which of the following statements relating to carbon and its compounds are correct? 1. 1-Propyne has three double bonds. 2. The boiling point of acetic acid is higher than methane. 3. Ethanol reacts with sodium metal and produces hydrogen gas. 4. Esters give effervescence on reaction with sodium bicarbonate. Select the answer using the code given below.
Acetic acid boils far above methane, and ethanol gives hydrogen with sodium, while statements 1 and 4 are false. Propyne (CH3–C≡CH) is an alkyne: it has one carbon–carbon triple bond and no double bonds, so statement 1 is wrong.
Read the full explanation →Which one among the following statements regarding gypsum is not correct?
Gypsum heated at 373 K becomes calcium sulphate hemihydrate, CaSO4 · ½H2O, which is plaster of Paris, not CaSO4 · H2O as the statement says.
Read the full explanation →Which of the following is/are the basic step(s) in genetically modifying an organism? 1. Identification of DNA with desirable genes 2. Introduction of the identified DNA into the host 3. Maintenance of introduced DNA in the host and transfer of the DNA to its progeny Select the correct answer using the code given below.
Making a genetically modified organism needs all three steps: find the useful DNA, put it into the host, and make sure the host keeps it and passes it on.
Read the full explanation →In which one of the following regions of the Earth is the ozone hole prominently observed in the stratosphere?
The ozone hole, a sharp seasonal thinning of stratospheric ozone, forms every southern spring over Antarctica. During the long polar winter a strong circular wind, the polar vortex, isolates the air over Antarctica, and temperatures fall low enough to form polar stratospheric clouds.
Read the full explanation →Which of the following statements about eutrophication is/are correct? 1. Eutrophication takes place in young lakes when the water is cold and clear. 2. Eutrophication is caused by nutrient enrichment in water bodies. Select the answer using the code given below.
Eutrophication is the enrichment of a water body with nutrients, so statement 2 is correct, while statement 1 describes the opposite condition.
Read the full explanation →If one set of chromosomes for a given plant is represented as N; in case of double fertilization, the zygote and the endosperm nucleus of a diploid plant would have how many sets of chromosomes respectively?
The zygote is diploid (2N) and the primary endosperm nucleus is triploid (3N). Double fertilisation is a feature of flowering plants.
Read the full explanation →