Rajasthan 2015 Previous Year GK Questions with Answers

The correct answer is D, 35‰. Every kilogram of sea water carries about 35 grams of dissolved salts, written as 35 parts per thousand, and roughly 27 of those grams are common salt, sodium chloride. Salinity is not the same everywhere. It falls where big rivers pour in fresh water or where heavy rain and melting ice dilute the sea, and it rises in hot, enclosed basins where evaporation is strong. That is why the Red Sea stands near 41 parts per thousand while the Baltic Sea is only about 7. A is wrong because 130 parts per thousand is far beyond any open ocean and belongs to a salt pan. B is wrong because 25 parts per thousand describes a brackish coastal patch near a river mouth, not the ocean as a whole. C is wrong because 225 parts per thousand is a laboratory strength brine. Exam tip: 35 average, Red Sea the saltiest sea, Baltic the least salty.

The correct answer is B, adrenaline. Adrenaline, also called epinephrine, is made by the medulla of the adrenal gland and is the body's emergency hormone; it makes the heart beat faster and stronger and narrows the small blood vessels, so blood pressure rises within seconds. That is why an injection of adrenaline is the first treatment when pressure crashes in shock or in a severe allergic reaction. The same hormone widens the air passages, raises blood sugar and gets the body ready for the fight or flight response. A is wrong because insulin, from the beta cells of the pancreas, lowers blood sugar and is used in diabetes. C is wrong because thyroxine from the thyroid controls the rate of metabolism and growth, and acts slowly over days. D is wrong because vasopressin, the antidiuretic hormone of the pituitary, chiefly saves water by making the kidney reabsorb it. Exam tip: adrenal medulla makes adrenaline, the fight or flight hormone that raises heart rate and blood pressure.

The correct answer is A, at maturity. Section 22 of the Negotiable Instruments Act, 1881 says that the maturity of a promissory note or bill of exchange payable otherwise than on demand is the date on which it falls due, and the three days of grace are already counted in arriving at that date. Payment therefore becomes due on the date of maturity itself, and the holder may present the instrument on that day.

Option B, after maturity, is wrong because the instrument is already overdue then and the holder's rights against the earlier parties can be affected. Option C, before maturity, is wrong because no party is bound to pay ahead of the due date, though a bill may be discounted earlier by agreement. Option D is a distortion of the days of grace, which are added while computing maturity and are not a separate day of payment after it. So A alone states the rule correctly.

The correct answer is B, there are not sufficient funds in your account. NSF stands for not sufficient funds, and a bank writes it on the return memo when the balance in the drawer's account is less than the amount of the cheque. This is the ground that attracts Section 138 of the Negotiable Instruments Act, 1881, under which issuing such a cheque is an offence punishable with imprisonment up to two years, or a fine up to twice the amount, or both.

Option A describes a know your customer problem, which is dealt with separately and is not what NSF means. Option C, forgery, is returned with a remark about the signature differing or the instrument appearing altered, and material alteration is covered by Section 87. Option D is not a banking return reason at all. Only the shortage of balance is described by the letters NSF.

The correct answer is A, 70 dB hearing loss in both ears. The Rights of Persons with Disabilities Act, 2016 defines a deaf person in its schedule as one having 70 dB hearing loss in speech frequencies in both ears. A person with 60 to 70 dB loss in speech frequencies in both ears falls in the separate category of hard of hearing, so the two definitions must be read together. The Act replaced the Persons with Disabilities Act of 1995, widened the list of recognised disabilities from seven to twenty-one, and reserved four per cent of government posts for persons with benchmark disability. Options B and C set the bar higher than the schedule does; at 80 or 90 dB many deaf persons would fall outside the definition and lose the benefits the Act gives. Option D, 60 dB, is the lower end of the hard of hearing band, not deafness. Exam tip: 60 to 70 dB is hard of hearing, 70 dB and above is deaf.

The correct answer is C, Residuary powers in the Centre – Canadian Constitution. The makers of the Constitution took the scheme of a federation with a strong centre from Canada, and with it the rule that subjects not listed in any of the three lists stay with the Union; Article 248 and entry 97 of the Union List carry that rule. The appointment of state Governors by the centre and the advisory jurisdiction of the Supreme Court come from the same source. Option A is wrong because the Directive Principles were borrowed from the Irish constitution; Australia gave the Concurrent List, freedom of trade and commerce, and the joint sitting of the two Houses. Option B names the American constitution for the federal system, whereas from the United States came fundamental rights, judicial review, an independent judiciary and the impeachment procedure. Option D is wrong because fundamental duties were taken from the constitution of the erstwhile USSR. Exam tip: Canada for residuary powers, Ireland for Directive Principles, USSR for duties.

The correct answer is D, Toggle Keys. A toggle key switches a feature on with one press and off with the next, so it has two states and keeps whichever one you left it in. Caps Lock, Num Lock, Scroll Lock and the Insert key work this way, and most keyboards carry a small indicator light that glows while the feature is on. Caps Lock, for instance, holds capital letters until it is pressed a second time. Option A is wrong because navigation keys move the cursor or the view: the four arrow keys with Home, End, Page Up and Page Down. Option B is not a standard class; keys such as Enter, Esc, Tab and the Windows key are grouped as control or special keys, and none of them stay switched on. Option C is wrong because the function keys are F1 to F12, which run one command each time they are pressed. Exam tip: the four toggle keys are Caps Lock, Num Lock, Scroll Lock and Insert.

The correct answer is C, 27 K. A rise of 27°C is a rise of 27 K, because one degree Celsius and one kelvin are exactly the same size. The two scales differ only in where they begin: the melting point of ice is 0°C but 273.15 K. So the formula T(K) = t(°C) + 273.15 converts a reading, not a difference. When two temperatures are subtracted the 273.15 cancels out, which is why a rise, a fall or an interval carries the same number on both scales. Option D, 300 K, is the trap in this question: 27 + 273 is the Kelvin reading of a body that is at 27°C, not the size of a 27-degree rise. Options A and B follow from no step at all; they would need a scale whose divisions are smaller than the Celsius degree, and the kelvin is not such a unit. Exam tip: add 273.15 to a reading, but copy an interval straight across.