X-rays 1. How do you increase/ decrease the strength of the X-rays produced? By increasing or decreasing the heating current By the nature of anodes By decelerating/ accelerating potential difference between the cathode and anode None Question 1 of 17 2. How is cooling achieved in an X-ray tube in order to dissipate heat? Through the cooling fins on the outside of the tubeCirculation of oil through the channels in the anode (copper) blockUse of a fan use of turbo chargerQuestion 2 of 17 3. Mention the uses of X-rays X-rays are used in hospitals for diagnosis and treatment of diseases. X-rays are used in industries to detect flaws in metal castings and welding X-rays are used to inspect luggage for any hidden weapons. All of the above Question 3 of 17 4. Define X-rays An X-ray is an electromagnetic wave X-rays by their nature are unknownX-rays are produced when a cathode ray beam suddenly hits a metal targetNone of the aboveQuestion 4 of 17 5. Mention the dangers of X-rays Excessive exposure of X-rays on living tissue may lead to damage or death of cells Little exposure leads to slow/ stagnant development of cells X-rays damage luggageNone Question 5 of 17 6. Which of the following statements is CORRECT about Soft X-rays? Have low penetrating power Have longer wavelengths Have less energy All of the above Question 6 of 17 7. Explain what happens when X-rays pass through magnetic or electric fields? They are deflected and charged They are not deflected and not charged They produce heat effect None of the aboveQuestion 7 of 17 8. If you increase the quantity of X-rays produced the strength remains the same (constant)? True False Maybe None Question 8 of 17 9. Hard X-rays are produced by fast moving electrons as a result of a high accelerating voltage. True or False? False True Maybe None Question 9 of 17 10. Mention the 2 types of X-rays? Hard Medium Soft tenderQuestion 10 of 17 11. How is an X-ray tube shielded from stray radiation? They have a protective lead shield Are built in concrete walls to absorb any leaking radiation all of the mentionedHave sound proof materials Question 11 of 17 12. Explain the energy transformation when a cathode ray beam is suddenly stopped by a metal target? Its kinetic energy is transformed to heat energy (99.5%) Only a small component of its kinetic energy is transformed into X-rays radiation (0.05%)no idea Its kinetic energy is transformed to potential energy Question 12 of 17 13. How can you determine the intensity (Quantity) of X-rays? It is controlled by the heating currentIt is controlled by the type of node and cathode The greater the heating current the greater no. of electrons produced No ideaQuestion 13 of 17 14. Which one of the following is not among the properties of X-ray They travel in straight lines at the speed of light (3.0 x 10 to the power of 8 ) m/sThey are electromagnetic radiations of shorter wavelength than visible light They can cause photoelectric emission They have more penetrating power than gamma raysQuestion 14 of 17 15. Which of the following statements is CORRECT about X-rays? They have the shortest wavelength They have the maximum frequency Since C (velocity of light) = f x Lambda then fmax = c/(Lambda min) All of the above Question 15 of 17 16. Which of the following statements is INCORRECT about Hard X-rays? Have high penetrating power They can penetrate through thick steelCan penetrate the flesh but are absorbed by bones Have a shorter wavelengthQuestion 16 of 17 17. Soft X-rays are produced by a relatively lower velocity electron beam than hard X-rays? True or False? True Maybe None DQuestion 17 of 17 Loading...
