T/F Which type of radiation is used for radiographic and radioscopic techniques?
ID: 2075782 • Letter: T
Question
T/F
Which type of radiation is used for radiographic and radioscopic techniques? a. X-rays. b. Gamma rays. c. Electromagnetic waves. d. Elastic waves. For x-ray inspections... a. The operator should visually observe the radiation of the object. b. Should never come in contact with the x-ray tube because of radiation. c. It is only possible to operate in a chamber that screens x-rays. d. X-ray tests in the field with a portable system are possible if regulations for protecting against ionizing radiation are considered. What are reasons for employing gamma sources instead of x-ray tubes for radiographic inspections? a. They are easier to handle. b. They don't need power supply and are portable. c. They have higher photon energies than x-ray tubes. d. The image quality is better. For x-ray testing, the generation of scattered radiation is........ a. Important to get a good image quality. b. Reduces image quality. c. Makes x-ray testing impossible. d. Can be neglected for fine gain materials.Explanation / Answer
1. since radiography is a nondestructive technique, so X-rays and gamma rays are employed. since both are forms of electromagnetic radiation, but eectromagnetic radiations do contain other rays too, so
a) T
b) T
c) F
d) F
2. operator can not visually observe x rays,
X- rays are produced inside tube so it is not harmful to come in contact with tube since rays are inside
it is necessary to operate in a chamber that screen X-rays so that X- rays do not come out and injure anybody
table top models for producing x-rays and using them for various purposes are available and are safe to use
so a) F
b) F
c) T
d) T
3. gamma rays are not easier to handle since they are obtained from radioactive isotopes.
yes they dont need power supply and are portable since their sources can be ported.
gamma rays have higher photon energies than x rays which makes them more penetrable in the sample thereby diagonising better
they have not that image quality as some information is lost
a) F
b) T
c) T
d) F
4. since testing can be done through diffraction and scattering so first option is correct, second option is contradictory to first , cannot be ignored for fine grain particles
a) T
b) F
c) F
d) F
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