RT Questions 2
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1.
Lead shot is sometimes packed around a specimen during exposure to:
2.
Two key properties for a good X-ray tube target are:
3.
Increasing kV with time-compensation to keep equal density usually:
4.
To preserve geometry on a radiograph, the central ray should be:
5.
Compared with low energy radiography, high energy radiography typically has:
6.
Cobalt-60 is produced from Cobalt-59 by capture of:
7.
In an X-ray tube, the cathode assembly comprises:
8.
Approximate practical thickness limit of a 250 kVp X-ray machine using lead foil screens is:
9.
A rotating anode in some X-ray tubes is used to:
10.
Side-scatter most often produces which radiographic effect?
11.
'Bird-foot' or sharp tree-shaped marks on a radiograph are typically caused by:
12.
A voltage selector with a single tapped iron-core winding is called a:
13.
Decrease in gamma-ray energy passing through matter is mainly due to:
14.
Range of specimen thickness adequately recorded on a radiograph is:
15.
Quantity of radiation reaching unit film area equals:
16.
Filtration at the tube during MV (million-volt) radiography:
17.
A small focal spot is preferred when desiring:
18.
Geometric unsharpness Ug equals:
19.
A device that uses a magnet + transformer to circulate electrons to high energies is a:
20.
Maximum scanning speed for conventional fluoroscopy is approximately:
21.
Which factor does NOT materially affect radiograph density?
22.
To increase radiation intensity from an X-ray tube:
23.
Filters between tube and specimen reduce undercutting by:
24.
kV selection should be:
25.
Stop bath in manual processing is used to:
26.
Mechanical stirrers running continuously in the developer can:
27.
Maximum focal-spot loading is governed by:
28.
Films stored long-term between lead screens in heat/humidity may:
29.
Curve relating density vs log(exposure) is the:
30.
Direct contact of lead screens with film helps because:
31.
Latent image is the:
32.
Substituting a faster film for a slower film generally:
33.
Subject contrast is most directly controlled by:
35.
Which of the following is NOT a primary radiation hazard control?
36.
Use of intensifying screens (Pb foil) in industrial RT primarily:
37.
Geometric unsharpness can be reduced by:
38.
Compton scattering predominates at:
39.
If subject contrast must be reduced for a part with both thin and thick sections, the technician should:
40.
During industrial X-ray exposure, the radiograph density is most quickly increased by:
43.
Acceptable density variation in area of interest vs. through-IQI is:
44.
Lead "B" letter for backscatter check should be at least:
45.
Backscatter unacceptable result is recognised by:
46.
DWDI technique is permissible for pipe sizes:
47.
DWSI is required when:
49.
ASTM wire-type IQI Set A contains:
50.
A radiograph quality marking "2-2T" means:
51.
For a weld with reinforcement on one side only and ground flush on the other, the IQI thickness selection is based on:
52.
Densitometer calibration verification is performed:
53.
Stainless steel hole-type IQI typically:
54.
Required calibration of which RT accessory is mandatory?
55.
If a film transmits 1/100 of incident light, its optical density is:
56.
If SFD > radius of curvature on a curved component, the location markers are placed on:
57.
For 30 mm thick Monel weld with 1.5 mm reinforcement on each side, total IQI-selection thickness is:
58.
An evaluator using UW-52 finds scattered porosity of 0.015″ in 25 mm CS plate. The porosity is:
59.
Per ASME Section VIII Div 1 acceptance, a non-relevant indication is:
60.
Which is the source-side location for a hole-type IQI in DWSI on small pipe with limited access?