NDA/NA SOLVED PAPER 2016-II (GENERAL KNOWLEDGE)Total Questions: 10021. It is difficult to kill viruses because they(a) consist of tough protein coat(b) are very small in size(c) lack cellular structure(d) spend a lot oftime inside the host's cellsCorrect Answer: (d) spend a lot oftime inside the host's cells22. When a ray of light enters a glass slab, then(a) only the frequency changes(b) frequency and velocity change(c) frequency does not change(d) frequency and wavelength changeCorrect Answer: (c) frequency does not changeSolution:As the light enters from rarer medium to the denser medium the speed of light decreases but the frequency remains the same.23. A ball is thrown vertically upward from the ground with a speed of 25.2 m/s. The ball will reach the highest point of its journey in(a) 5.14s(b) 3.57 s(c) 2.57 s(d) 1.29sCorrect Answer: (c) 2.57 s24. One kilowatt hour is equal to(a) 36 × 10³ joule(b) 36 × 10⁵ joule(c) 10³ joule(d) 10⁵ jouleCorrect Answer: (b) 36 × 10⁵ jouleSolution:One kilowatt hour is 3600000 joules. 1 KWh = 300000 joules = 36 × 106 joules.25. When sound waves are propagated through a medium, the physical quantity/quantities trahsmitted is/are(a) matter only(b) energy only(c) energy and matter only(d) energy, momentum and matterCorrect Answer: (b) energy only26. Pressure is a scalar quantity because(a) it is the ratio of force to area and both force and area are vectors(b) it is the ratio of magnitude of force to area(c) itis the ratio of component of force (normal to area) to area(d) none of the aboveCorrect Answer: (c) itis the ratio of component of force (normal to area) to areaSolution:Pressure is magnitude of force normal to the area.27. A person is unable to read a newspaper without his glasses. He is most probably suffering from(a) myopia(b) presbyopia(c) astigmatism(d) hypermetropiaCorrect Answer: (b) presbyopiaSolution:Long sightedness or hypermetropia is eye related problem in which image is formed behind the retina. This may be due to short eye or cornea or crystalline lens does not refract the light enough.28. The free fall acceleration g increases as one proceeds, at sea level, from the equator toward either pole. The reason is(a) Earth is a sphare with same density everywhere(b) Earth is a sphere with different density at the polar regions than in the equatorial regions(c) Earth is approximatelyan ellipsoid having its equatorial radius greater than its polar radius by 21 km(d) Earth is apporximately an ellipsoid having its equatorial radius smaller than its polar by 21 kmCorrect Answer: (c) Earth is approximatelyan ellipsoid having its equatorial radius greater than its polar radius by 21 km29. Which one of the following statements is correct?(a) The measurment of mass taken by a spring weighing balance is correct at the place where the spring balance is calibrated for(b) The measurment of mass taken by a spring weighing balance is correct at all places(c) The measurment of mass taken by a spring weighing balance is correct at the places where the acceleration due to gravity is same with the place where the spring balance is calibrated for(d) A spring balance cannot be used to measure mass at any placeCorrect Answer: (c) The measurment of mass taken by a spring weighing balance is correct at the places where the acceleration due to gravity is same with the place where the spring balance is calibrated for30. Which one of the following is not a contact force?(a) Push force(b) Gravitational force(c) Frictional force(d) Strain forceCorrect Answer: (b) Gravitational forceSolution:Gravitational force is an imaginary force pulling everything towards the earth surface without any contact to the object.Submit Quiz« Previous12345678910Next »
