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Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.
Khub.info Learn TNPSC exam and online pratice
Q1. Cryogenic engines find applications in .....
Q2. The difference between a nuclear reactor and an atomic bomb is that .....
Q3. Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?
Q4. Optical fibre works on the principle of ......
Q5. An air bubble in water will act like a .......
Q6. The technique used to transmit audio signals in televisions broadcasts is
Q7. Assertion {A}: A diamond sparkles more than a glass imitation cut to the same shape. Reason {R}: The refractive index of diamond is less than that of glass.
Q8. Suppose a rocketship is receding from the earth at a speed of 2/10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observed on the earth?
Q9. Which one of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure?
Q10. In an electronic watch, the component corresponding to the pendulum of a pendulum clock is a ......
Q11. The basic reason for the extraordinary sparkle of a suitably cut diamond is that......
Q12. A corked bottle full of water when frozen will break because ....
Q13. The half life of a radioactive element is 5 years. The fraction of the radioactive substance that remains after 20 years is ....
Q14. The working of he quartz crystal in the watch is based on the ....
Q15. The formation of brilliant colours in a thin soap film is a consequence of the phenomena of ....
Q16. Assertion (A): A mixture of salt and ice gives temperature below 0 degree C. Reason {R}: The salt raises the freezing point of ice.
Q17. A wooden block is floating in water. If 4/5 of its volume is immersed in water and volume of the water disposed is 800 ml, the volume of the block is ....
Q18. What is the increasing order of the wavelengths of the following colours? (1) Orange (2) Indigo (3) Yellow (4) Violet
Q19. In which one of the following places the boiling point of water is the highest?
Q20. Which one of the following will take place when a watch based on oscillating spring is taken to a deep mine?
Q21. A body is attached to a spring balance suspended from a stand. The reading on the balance is 0.5 kg. The two together are detached from the stand and allowed to fall through a height. While falling the reading in the balance will be .....
Q22. Galvanising of sheet iron is done by dipping the sheet metal into molten ....
Q23. The minimum possible temperature beyond which matter cannot be cooled is .....
Q24. Photons have properties similar to that of .....
Q25. Elements having atomic number higher than '92' in the periodic table are known as .....
Q26. A passing motorcycle causes distortion or disturbance with reception of signal in radio and TV. The cause of this is .....
Q27. Atoms of the same element having the same atomic number but different atomic weight are called.....
Q28. Superconductors are so called because they
Q29. Weights of two pieces, one of gold and one of silver each weighing 100 gms were recorded on a spring balance. Then they were fully immersed in a liquid bath, by letting them hand through a light thread tied to the balance. Compare the recorded weights of the two pieces under that condition. Then,
Q30. A cubic metre of water at 0 degree C is solidified into ice. Density of ice is 0.96 of water at 0 degree C. Which of the following deductions are true? (1) Water expands when solidified. (2) Ice will float in water at 0 degreeC with half its volume above the surface. (3) Density of all liquids are higher than its density when solidified.
Q31. The rainbow and the rainbow like colours seen on a thin film of oil on a water surface are two phenomena. They are ....
Q32. Assertion (A): When a ship moves from the sea wter into fresh water of a river, the ship will relatively sink. Reason {R}: The density of sea wter is higher thana that of the fresh water.
Q33. Assertion (A): Unlike photographic film, which can be used only once, video tapes can be reused several times. Reason {R}: Photography involves chemical change but video recording is a physical change.
Q34. Assertion (A): When a wheel is in motion, a point (on the rim) which is farthest away from the ground will have the highest speed while the point (on the rim) closest to the ground will have the lowest speed. Reason {PR}: The speed of the point on the rim in the diretion of motion and doing along the circumference of the wheel are additive.
Q35. The conversion of electricala energy into chemical energy is observed in .....
Q36. Given below are colours of the visible spectrum. Identify the correct sequence in order of increasing wavelengths.
Q37. Assertion (A): A tennis ball will bounce higher in Calcutta than it would in Shimla. Reason {R}: The downward pull due to gravity is less and air is more rarefied in Shimla than in Calcutta.
Q38. A boat filled with some stones is floating in water. If the stones are dropped into the water, the level of the water will .....
Q39. Total internal reflection occurs when light travels from ......
Q40. A chair is tilted about two of its legs and then left. It would return to its original position if
Q41. Which of the following is CORRECT?
Q42. Sodium vapour lamps are preferred to incandescent lamps because of .....
Q43. If a block of gold weighing 100 gm in air is immersed in water with a string tied to a spring balance, what could be the probable weight indicated by the spring balance?
Q44. Neutron was discovered by
Q45. A free floating astronaut "A" pushes another free floating astronaut "B" in space The mass "A" is greater than of "B". The force exerted by the astronaut "A" on astronaut "B" will be .....
Q46. On the Moon, astronauts inflate a rubber balloon with hydrogen gas and release it at a height of 2 metres. The balloon will ....
Q47. The phenomenon of mirage is due to ....
Q48. The resolving power of an electron microscope is much higher than that of an ordinary light microscope because resolving power increases .....
Q49. If camera A has f 4.5 lens and camera B has f 2.8 lens, and the diameters of both the lenses are equal, then,
Q50. The fuel used in Fast Breeder Test Reactor at Kalpakkam is .....
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