SBI PO Preliminary English Language Practice quiz 4
Direction (Q. 1 to 10): Read the following passage and answer the questions given below it. A few words have been given in bold so as to help you locate them for the answers to some of the questions. Isaac Newton, the English scientist proposed proposed some new basics of physics to the world. He questioned “If the apple could fall, why the moon held on?” He discovered that against the gravitational pull of the earth, the force of a moving moon balanced it and thus preventing it from falling off. He enunciated his law that “All heavenly bodies attract one another and the universal gravitation pervades the whole of nature and governs the motion of all the bodies. Newton’s famous third law of motion, which states that “to every action, there is an equal and opposite reaction”, has become the basis of rocket and missile propulsion . Thus was published his Principia in 1687, where he gave three prerequisites for a satellite—it should be fast enough, it should be afar the atmosphere, it must be projected horizontally. After Newton, the Russian scientist Tsiolovsky, often regarded as the founder of astronautics, proved that man could go into space only by a rocket. To provide the proper thrust to the rocket, various propellant combinations were suggested, owing to the dimensions and weight of the rocket. A single stage rocket would need fuel roughly four times its own weight but this need would be considerably less if the rocket were in stages. He proposed that if the velocity of combusted gases rushing backwards from the rocket was high, this would result in an increase in its forward thrust t. Sputnik I was the first jump by mankind into space. It was a three-stage rocket launched by Russia. Space technology has been completely revolutionized by the application of transistors and computers.
Nature facilitates the satellite launching by a decrease in the gravitational pull of earth, as we move away from the earth’s surface. To avoid resistance of the atmosphere, a satellite is first taken to a height of 150 km and launched horizontally. For this, a minimum velocity of nearly 8 km per second is required, which means about 28,800 km/hr.
| 1 . | How is thrust helpful in launching the rocket? | ||||
| |||||
| |||||
| 2 . | What appropriate title can be given to the above passage? | ||||
| |||||
| |||||
| 3 . | Which of these statements is analogous to the third law proposed by Newton? | ||||
| |||||
| |||||
| 4 . | What is the Principia? | ||||
| |||||
| |||||
| 5 . | Direction (Q. 45 to 47): Choose the word(s) which conveys the same meaning as the word(s) given in bold letters used in the passage. Q. “pervades the whole” | ||||
| |||||
| |||||
| 6 . | PROPULSION | ||||
| |||||
| |||||
| 7 . | THRUST | ||||
| |||||
| |||||
| 8 . | Direction (Q. 48 to 50): Choose the word from the given choices, which is opposite in meaning to the word given in bold letters used in the passage. Q.PROPOSE | ||||
| |||||
| |||||
| 9 . | REVOLUTIONISED | ||||
| |||||
| |||||
| 10 . | FACILITIES | ||||
| |||||
| |||||
No comments:
Post a Comment