Top 150+ Solved Radiographic Testing Level 2 MCQ Questions Answer
Q. The average energy of a T3-170 source is approximately:
a. 60-80 keV
b. 660 keV
c. 400 keV
d. 1.2 MeV
Q. The gamma factor of Co-60 is:
a. 1.37 R·h-1·Ci-1at one metre
b. 0.59 R·h-1·Ci-1at one metre
c. 0.0062 R·h-1·Ci-1at one metre
d. 0.38 R·h-1·Ci-1at one metre
Q. The intensifying effect of lead screens is mainly caused by:
a. X ray generated by the lead screens
b. Fluorescence of the lead screens
c. Excited electrons
d. The Maxwell effect
Q. Which of the following expressions correctly determines radiographic density?
a. Io/It
b. Log (Io/It)
c. Log (Io-It)
d. Io-It
Q. The most significant difference in two X ray beams produced at different kV settingsis:
a. Beam intensity
b. Exposure
c. Wavelength distribution
d. Beam divergence
Q. Most significant difference in two X ray beams produced at different mA settings is:
a. Penetrating power
b. Wavelength distribution
c. X ray quality
d. Beam intensity
Q. Which of the following would be considered a film artifact?
a. Excessive film density
b. Insufficient film density
c. Insufficient definition (penetrameter holes)
d. Static marks
Q. Natural discontinuities comparable in size to the penetrameter holes shown on aradiograph may not be detected because:
a. Natural discontinuities may contain less dense material than the penetrameter holes
b. Natural discontinuities may be thicker than the penetrameter holes
c. Natural discontinuities do not necessarily have as sharp edges as the penetrameter holes
d. All of the above
Q. If the radiation intensity is 1 Gy/h (100 R/h) at a distance of 152.4 cm (5 feet) from asource, what is the intensity at 610 cm (20 feet)?
a. 0.0625 Gy/h (6.25 R/h)
b. 0.25 Gy/h (25 R/h)
c. 16 Gy/h (1600 R/h)
d. 4 Gy/h (400 R/h)
Q. Fluorescent screens are seldom used in industrial radiography because:
a. Light leaks degrade the film image
b. Film fogging can result if used in the vicinity of fluorescent lights
c. Poor definition and screen mottle can result
d. None of the above
Q. Calculate geometric unsharpness for the following conditions: Source size = 2 mm × 2mm; SFD = 700 mm; test piece thickness = 25 mm
a. 0.6 mm
b. 0.06 mm
c. 6,0 mm
d. 0.15 mm
Q. The gamma factor of Ir-192 is:
a. 1.37 R·h-1·Ci-1at one metre
b. 0.59 R·h-1·Ci-1at one metre
c. 0.0062 R·h-1·Ci-1at one metre
d. 0.38 R·h-1·Ci-1at one metre
Q. A test piece with large differences in thickness would have:
a. High film contrast
b. High subject contrast
c. Low subject contrast
d. Low film contrast
Q. A quantity expressed by the formula, 0.693/(absorption co-efficient) is called:
a. Half value layer
b. Mass attenuation constant
c. Half-life
d. Specific activity
Q. Which of the following techniques would probably reduce the amount of scatteredradiation reaching the film during a radiographic exposure?
a. Using a finer grained film
b. Using a filtered X ray beam
c. Removing lead screens
d. All of the above