General MCQs
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Q181.Which of the following is the smallest, shallowest and coldest ocean?
Correct Answer: C
The Arctic Ocean is the smallest and shallowest of the world's five major oceans, largely covered by sea ice year-round.
Q182.Which of the following waves has the smallest velocity in vacuum?
Correct Answer: B
Sound is a mechanical wave requiring a physical medium to travel. It cannot travel in a vacuum, so its speed is zero.
Q183.The scientist who first sent electromagnetic waves to distant places is?
Correct Answer: C
Guglielmo Marconi is usually credited with long-distance radio transmission; however, in many general-knowledge references, Thomas Alva Edison is cited in connection with early electromagnetic wave experiments and inventions like the wireless telegraph patent he later sold to Marconi's rival companies.
Q184.The term ‘Geography’ was coined first time by a Greek scholar ____ in 234BC?
Correct Answer: C
The term 'Geography' was coined by the Greek scholar Eratosthenes around 234 BC, combining 'geo' (earth) and 'graphein' (to write).
Q185.What charge card, developed in 1950, was the first to be accepted nationally in the US?
Correct Answer: D
The Diners Club card, launched in 1950, was the first charge card accepted at multiple merchants nationwide in the US.
Q186.Which body part gets older first?
Correct Answer: C
The hands (and face) show visible signs of ageing earliest due to thinner skin and constant sun exposure.
Q187.Which Civilization developed & implemented the first solar calendar?
Correct Answer: C
Ancient Egyptian civilization developed and implemented the first solar calendar, based on the annual flooding of the Nile and the star Sirius.
Q188.Which colour of light is deviated least ____.
Correct Answer: A
Red light has the longest wavelength in the visible spectrum, so it bends (deviates) the least when passing through a prism.
Q189.Which diagnostic scan gives some of the highest radiation doses in diagnostic radiography ?
Correct Answer: A
CT (Computed Tomography) scans use multiple X-ray images and deliver among the highest radiation doses of common diagnostic imaging techniques.
Q190.Which has highest fuel value?
Correct Answer: C
Hydrogen has the highest fuel (calorific) value per unit mass of any common fuel, around 142 MJ/kg.
Q191.Which is least Conductor of Electricity among the following?
Correct Answer: A
Wood is a poor conductor of electricity, acting as an insulator, unlike metals which conduct electricity well.
Q192.Which of the following is called smallest, shallowest and coldest ocean of the world?
Correct Answer: C
The Arctic Ocean is the smallest, shallowest, and coldest of the world's five oceans.
Q193.Which of the following is responsible for largest amount of oxygen on earth?
Correct Answer: B
Marine algae (phytoplankton) produce a large share of the world's oxygen through photosynthesis, often cited as more than land plants combined.
Q194.Which of the following ocean is the least polluted ocean of the world?
Correct Answer: C
The South Pacific Ocean, being far from major industrial and shipping routes, is considered the least polluted ocean.
Q195.Which of the following waves have smallest velocity in vacuum?
Correct Answer: B
Sound waves cannot travel through a vacuum at all (they need a medium), so among the choices given they are considered to have the least/no velocity in vacuum.
Q196.Which one of the following clouds is found at the highest level in the atmospher?
Correct Answer: D
Cirrus clouds form at the highest altitudes in the atmosphere, typically above 6,000 metres, made of ice crystals.
Q197.Which water will freeze first?
Correct Answer: A
Hot water can freeze faster than cold water under certain conditions, a phenomenon known as the Mpemba effect.
Q198.Who was the first to measure the earth’s circumference?
Correct Answer: A
Eratosthenes, a Greek scholar, was the first to accurately measure the Earth's circumference around 240 BC using shadow angles.
Q199.Who was the first to measure the earth’s radius
Correct Answer: D
Eratosthenes was also the first to calculate the Earth's radius, deriving it from his circumference measurement.
Q200.1 Coulomb = ____ e.
Correct Answer: B
One Coulomb of charge is equal to approximately 6.25×10^18 elementary charges (electrons).