Top 150+ Solved Radiographic Testing Level 2 MCQ Questions Answer
Q. How does radiation intensity change with increasing distance from the source?
a. Inversely with distance
b. Inversely with the square of distance
c. Directly with distance
d. Directly with the square of distance
Q. A weld discontinuity which consists of unmelted joint surfaces at the root, and whichmay be caused by poor fit- up, is called:
a. Hot short cracking
b. A slag inclusion
c. Incomplete penetration
d. Burn through
Q. Mottling due to X ray diffraction can be identified by:
a. Noting a large change between two successive exposures with the test piece rotated slightly about the beam axis
b. Noting a slight change between two successive exposures with the test piece rotated slightly about the beam axis
c. Noting a characteristic pattern corresponding to the lattice spacing
d. None of the above
Q. Which of the following welding discontinuities would be considered the most serious?
a. Porosity
b. Incomplete penetration
c. Crack
d. Slag inclusions
Q. A depression at the edge of a weld where the base metal has been melted duringwelding is called:
a. Burn through
b. Undercut
c. Root concavity
d. Root convexity
Q. Which of the following would not be considered a film artifact?
a. Sugar
b. Chemical streaks
c. PI lines
d. Pressure marks
Q. Gamma ray or high voltage X ray radiography, using film without lead screens, islikely to result in:
a. Mottling of the film
b. Increased geometric unsharpness
c. No apparent difference, but increased exposure time
d. No apparent difference, but decreased exposure time
Q. Which of the following would be detrimental to radiographic image sharpness?
a. Small focal spot
b. Small film focal distance
c. Small object to film distance
d. None of the above
Q. A change in which the following parameters would require a new X ray exposurechart?
a. kV
b. X ray machine
c. Test piece thickness
d. All of the above
Q. If the required exposure time for a 1850 GBq (50 curie) Ir-192 source is 4 minutes,what exposure time would be required for 925 GBq (25 curie) source:
a. 4 minutes
b. 8 minutes
c. 2 minutes
d. 16 minutes
Q. A radiograph is made using film X with an exposure of 10 mA-min. Film density obtained in the area of interest is 1.0. If it is desired to achieve a density of 2.0 in the area of interest, what exposure is required? (Log relative exposure = 1.1 for a density of 1.0 and 1.62 for a density of 2.0)
a. 41.67 mA-min
b. 10 mA-min
c. 12.6 mA-min
d. 33.1 mA-min
Q. The least offensive of the following welding discontinuities would probably be:
a. Incomplete penetration
b. Lack of fusion
c. Slag inclusions
d. Porosity
Q. A quantity calculated by the formula, 0.693/(decay constant), is called:
a. Half value layer
b. Mass attenuation constant
c. Half-life
d. Specific activity
Q. The density difference displayed from one area of a film radiograph to another is called:
a. Subject contrast
b. Radiographic contrast
c. Film contrast
d. Film latitude