Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. Deep scratches on lead intensifying screens will cause?
a. Selective image enhancement
b. Irregular light lines on the film
c. Dark lines on the film
d. Unacceptable blockage of the primary radiation beam
Q. Which of the following is classified as electromagnetic radiation?
a. Visible light
b. X rays
c. Infrared radiation
d. All of the above
Q. The main disadvantage of having a small focal spot on an X ray tube is:
a. Heat is conducted away too fast
b. Sharper radiographic images may be achieved with a larger focal spot
c. A smaller focal spot is limited to lower tube currents because of the potential damage from overheating
d. None of the above
Q. Exposure of whole body to moderate radiation doses of 500 – 2000 mSv (50 to200 rem) would probably cause which of the following effects?
a. Blood cell changes
b. Swelling
c. Possible nausea
d. All of the above
Q. A reaction which occurs when a radiation beam of 90 keV is totally absorbed by a testpiece would probably be:
a. The Compton effect
b. The photoelectric effect
c. Pair production
d. Any of the above
Q. The term used to describe the reaction of human reproductive cells, to ionizingradiation is:
a. Genetic effects
b. Somatic effects
c. Corpuscular effects
d. Hematological effects
Q. How is the wavelength of scattered radiation related to the primary beam?
a. Longer
b. Shorter
c. Same
d. Not related
Q. Higher X ray tube voltages result in:
a. Shorter wavelengths X rays
b. More penetrating X rays
c. Higher intensity X ray beam
d. All of the above
Q. Betatrons are used to produce X rays having energy in the range of:
a. Several MeV
b. 50-500 keV
c. 500-1000keV
d. 0-50 keV
Q. A linear accelerator is used to produce X rays in what range?
a. Several MeV
b. 50-500 keV
c. 500-1000keV
d. 0-50 keV
Q. For a particular isotope, gamma radiation intensity is determined by:
a. Type isotope used
b. Energy level of gamma rays in source
c. Source strength in curies
d. None of the above
Q. A term used to describe the range of radiation intensities falling on the film duringexposure is:
a. Film contrast
b. Radiographic contrast
c. Subject contrast
d. Radiographic sensitivity
Q. An expression which is used to describe the slope of a film characteristic curve is:
a. Film latitude
b. Film contrast
c. Film sensitivity
d. Film gradient
Q. Which of the following factors affect film graininess?
a. Wavelengths of radiation
b. Film processing conditions
c. Film speed
d. All of the above
Q. The amount of radioactivity which corresponds to 3.7 × 1010 disintegrations per secondis called:
a. 0.01 gray (1 rad)
b. 1 Farad
c. 37 GBq (1 curie)
d. 10 mSv (1 roentgen)