ASNT RT LEVEL II Review
Low-voltage X-ray tubes are usually outfitted with home windows made of:
a. Plastic.
B. Beryllium.
C. Glass.
D. Lead.
B. Beryllium.
The projected place of the goal of an X-ray tube is referred to as the:
a. Focal spot.
B. Focus.
C. Effective focal spot.
D. Geometric unsharpness.
C. Effective focal spot.
The standard technique of manufacturing X-rays involves the sudden deceleration of
excessive-velocity electrons in a stable body called a:
a. Consciousness cup.
B. Filament.
C. Target.
D. Cathode.
C. Target.
F it have been vital to radiograph a 7 in. (177.Eight mm) thick metal product, which of the
subsequent gamma-ray sources would most probably be used?
A. Co-60
b. Tm-one hundred seventy
c. Ir-192
d. Cs-137
a. Co-60
A Co-60 gamma-ray source has an approximate sensible thickness limit of:
a. 2.Five in. (63.Five mm) of steel or its equal.
B. 4 in. (one hundred and one.6 mm) of metal or its equal.
C. 8 in. (203.2 mm) of metallic or its equivalent.
,D. Eleven in. (279.4 mm) of metallic or its equivalent.
C. Eight in. (203.2 mm) of steel or its equal.
The absorption of gamma rays from a given source whilst passing thru matter relies upon on:
a. The atomic wide variety, density, and thickness of the problem.
B. Young's modulus fee of the problem.
C. Poisson's ratio fee of the matter.
D. The specific pastime cost of the source.
A. The atomic number, density, and thickness of the problem.
The truth that gases, while bombarded via radiation, ionize and turn out to be electrically
conductive makes them beneficial in:
a. X-ray transformers.
B. X-ray tubes.
C. Masks.
D. Radiation detection device.
D. Radiation detection system.
The speed of electrons putting the goal in an X-ray tube is a feature of the:
a. Atomic variety of the cathode material.
B. Atomic quantity of the filament material.
C. Voltage difference between the cathode and anode.
D. Modern waft within the rectifier circuit.
C. Voltage difference between the cathode and anode.
The choppy distribution of evolved grains inside the emulsion of a processed X-ray film causes
the subjective affect of:
a. Graininess.
B. Streaks.
C. Spots.
D. White scum.
A. Graininess.
Co-60 is mentioned to have a half-life of five.3 years. By how lots should exposure time be
expanded (over that used to begin with to provide amazing radiographs when the Co-60 source
was new) while the source is two years vintage?
A. No alternate in exposure time is wanted.
B. Exposure time have to be about 11% longer.
C. Exposure time must be approximately 37% longer.
, D. Exposure time must be approximately sixty two% to one hundred% longer.
C. Exposure time ought to be approximately 37% longer.
A supply of Ir-192, whose 1/2-lifestyles is 75 days, affords an most excellent publicity of a given
test object today in a length of 20 min. Five months from now, what publicity time would be
required for the same radiographic density, under comparable publicity conditions?
A. 10 min
b. 20 min
c. 1 h and 20 min
d. 6 h
c. 1 h and 20 min
Of the subsequent, the source presenting the maximum penetrating radiation is:
a. Co-60.
B. 220 kVp X-ray tube.
C. 15 MeV X-ray betatron.
D electrons from Ir-192.
C. 15 MeV X-ray betatron.
The gamma ray intensity at 1 feet (300 mm) from a 1 Ci (37 GBq) source of radioactive Co-60 is
nearest to:
a. 15 R per hour (one hundred fifty mSv in line with hour).
B. A thousand R consistent with hour (10 000 mSv in line with hour).
C. 1 R in step with min (10 mSv in keeping with min).
D. 10 mR according to day (a hundred μSv according to day).
A. 15 R in step with hour (one hundred fifty mSv per hour).
The focal spot in an X-ray tube:
a. Is willing at an angle of 30° from ordinary to the tube axis.
B. Is maintained at a high negative voltage at some stage in operations.
C. Should be as big as possible to make sure a slender beam of primary radiation.
D. Should be as small as possible without unduly shortening the existence of the tube.
D. Must be as small as viable without unduly shortening the lifestyles of the tube.
In an X-ray tube, the filament and focusing cup are the two important parts of the:
a. Anode.
B. Cathode.
C. Rectifier.
Low-voltage X-ray tubes are usually outfitted with home windows made of:
a. Plastic.
B. Beryllium.
C. Glass.
D. Lead.
B. Beryllium.
The projected place of the goal of an X-ray tube is referred to as the:
a. Focal spot.
B. Focus.
C. Effective focal spot.
D. Geometric unsharpness.
C. Effective focal spot.
The standard technique of manufacturing X-rays involves the sudden deceleration of
excessive-velocity electrons in a stable body called a:
a. Consciousness cup.
B. Filament.
C. Target.
D. Cathode.
C. Target.
F it have been vital to radiograph a 7 in. (177.Eight mm) thick metal product, which of the
subsequent gamma-ray sources would most probably be used?
A. Co-60
b. Tm-one hundred seventy
c. Ir-192
d. Cs-137
a. Co-60
A Co-60 gamma-ray source has an approximate sensible thickness limit of:
a. 2.Five in. (63.Five mm) of steel or its equal.
B. 4 in. (one hundred and one.6 mm) of metal or its equal.
C. 8 in. (203.2 mm) of metallic or its equivalent.
,D. Eleven in. (279.4 mm) of metallic or its equivalent.
C. Eight in. (203.2 mm) of steel or its equal.
The absorption of gamma rays from a given source whilst passing thru matter relies upon on:
a. The atomic wide variety, density, and thickness of the problem.
B. Young's modulus fee of the problem.
C. Poisson's ratio fee of the matter.
D. The specific pastime cost of the source.
A. The atomic number, density, and thickness of the problem.
The truth that gases, while bombarded via radiation, ionize and turn out to be electrically
conductive makes them beneficial in:
a. X-ray transformers.
B. X-ray tubes.
C. Masks.
D. Radiation detection device.
D. Radiation detection system.
The speed of electrons putting the goal in an X-ray tube is a feature of the:
a. Atomic variety of the cathode material.
B. Atomic quantity of the filament material.
C. Voltage difference between the cathode and anode.
D. Modern waft within the rectifier circuit.
C. Voltage difference between the cathode and anode.
The choppy distribution of evolved grains inside the emulsion of a processed X-ray film causes
the subjective affect of:
a. Graininess.
B. Streaks.
C. Spots.
D. White scum.
A. Graininess.
Co-60 is mentioned to have a half-life of five.3 years. By how lots should exposure time be
expanded (over that used to begin with to provide amazing radiographs when the Co-60 source
was new) while the source is two years vintage?
A. No alternate in exposure time is wanted.
B. Exposure time have to be about 11% longer.
C. Exposure time must be approximately 37% longer.
, D. Exposure time must be approximately sixty two% to one hundred% longer.
C. Exposure time ought to be approximately 37% longer.
A supply of Ir-192, whose 1/2-lifestyles is 75 days, affords an most excellent publicity of a given
test object today in a length of 20 min. Five months from now, what publicity time would be
required for the same radiographic density, under comparable publicity conditions?
A. 10 min
b. 20 min
c. 1 h and 20 min
d. 6 h
c. 1 h and 20 min
Of the subsequent, the source presenting the maximum penetrating radiation is:
a. Co-60.
B. 220 kVp X-ray tube.
C. 15 MeV X-ray betatron.
D electrons from Ir-192.
C. 15 MeV X-ray betatron.
The gamma ray intensity at 1 feet (300 mm) from a 1 Ci (37 GBq) source of radioactive Co-60 is
nearest to:
a. 15 R per hour (one hundred fifty mSv in line with hour).
B. A thousand R consistent with hour (10 000 mSv in line with hour).
C. 1 R in step with min (10 mSv in keeping with min).
D. 10 mR according to day (a hundred μSv according to day).
A. 15 R in step with hour (one hundred fifty mSv per hour).
The focal spot in an X-ray tube:
a. Is willing at an angle of 30° from ordinary to the tube axis.
B. Is maintained at a high negative voltage at some stage in operations.
C. Should be as big as possible to make sure a slender beam of primary radiation.
D. Should be as small as possible without unduly shortening the existence of the tube.
D. Must be as small as viable without unduly shortening the lifestyles of the tube.
In an X-ray tube, the filament and focusing cup are the two important parts of the:
a. Anode.
B. Cathode.
C. Rectifier.
