NDA/NA SOLVED PAPER 2016-II (GENERAL KNOWLEDGE)Total Questions: 10051. A plan having yellow leaves with dead spots has the deficiency of(a) Potassium(b) Magnesium(c) Nitrate(d) PhosphateCorrect Answer: (a) PotassiumSolution:The Mg-deficient leaves show advanced interveinal chlorosis, with necrosis developing in the highly chlorotic tissue.52. Fluoride toothpaste is sometimes recommended because fluoride(a) prevents plaque formation(b) hardents the enamel of the tooth(c) kills pathogenic bacteria(d) prevents tooth acheCorrect Answer: (b) hardents the enamel of the toothSolution:Fluoride is effective in preventing and reversing the early signs of dental caries (tooth decay) by hardening the enamel of the tooth.53. Along a streamline flow of fluid(a) the velocity of all fluid particles at a given instant is constant(b) the speed of fluid particle remains constant(c) the velocity of all fluid particles crossing a given position is constant(d) the velocity of a fluid particle remains constantCorrect Answer: (a) the velocity of all fluid particles at a given instant is constant54. Howis the kinetic energy of a moving object affected if the net work done on it is positive?(a) Decrease(b) Increases(c) Remains constant(d) Becomes zeroCorrect Answer: (b) Increases55. A particle is executing simple harmonic motion.Which one of the following statements about the acceleration of the oscillating particle is true?(a) It is always in the opposite direction to velocity(b) It is proportional to the frequency of oscillation(c) It is minimum when the speed is maximum(d) It decreases as the potential energy increasesCorrect Answer: (c) It is minimum when the speed is maximum56. Which one of the following four particles, whose displacement x and acceleration aₓ are related as follows, is executing simple harmonic motion?(a) aₓ = +3х(b) aₓ = +3x²(c) aₓ = -3x²(d) aₓ = -3xCorrect Answer: (d) aₓ = -3x57. Ifwe plot a graph between volume Vand inverse of pressure P (i.e. 1/p) for an ideal gas at constant temperature T, the curve so obtained is(a) straight line(b) circle(c) parabola(d) hyperbolaCorrect Answer: (a) straight line58. Which one of the following statements is correct?(a) The speed of sound waves in a medium depends opon the elastic property of the medium but not on inertia property.(b) The speed of sound waves in a medium depends upon the inertia property of the medium but not on elastic property(c) The speed of sound waves in a medium depends neither on its elastic property nor on its inertia property(d) The speed of sound waves in a medium depends both on elastic and inertia properties of the medium.Correct Answer: (d) The speed of sound waves in a medium depends both on elastic and inertia properties of the medium.59. Which one of the following statements is not correct?(a) Pitch of a sound is its characteristic by which we can generally differentiate between a male voice and a female voice(b) The loudness of sound is related to its frequency(c) A musical sound has certain well defined frequencies which are generally harmonics of a fundamental frequency(d) The timbre of a particular musical sound is related to the waveform of the sound waveCorrect Answer: (b) The loudness of sound is related to its frequency60. A particle executes linear simple harmonic motion with amplitude of 2 cm. when the particle is at 1 cm from the mean position, the magnitudes of the velocity and the acceleration are equal. Then its time period (in second) is(a)(b)(c)(d)Correct Answer: (a)Submit Quiz« Previous12345678910Next »
