General RT
False indications caused by something other than a discontinuity or the structural configuration of the test object are referred to as:
What is an artifact?
The QF for Alpha particles:
What is 20?
When numbering a circular test object, are reference numbers oriented in a straight line, clockwise, or counter-clockwise?
Place in a Clockwise Direction.
A film cassette loaded with a paper interleaf left on the film might result in what quality of a radiograph?
What is an excessively LIGHT-DENSITY radiograph?
When we inadvertently expose the same film twice:
What is double exposure?
Becquerel’s and Curies are units of measurement of:
What is Decay Rate?
X-ray quality or penetration is controlled by the:
What is Kv?
Masking is....?
The practice of covering or surrounding portions of the test object with highly absorbent material during exposure
Film static marks, crimp marks and light leaks are all examples of:
What are Artifacts?
The three letter acronym used to describe the radiation dose that causes 50% of those exposed to die:
What is MLD?
X-ray intensity or quantity is controlled by the:
What is mA?
Streaks, stains, and spotting are all signs of:
a. Light streaks
b. Under developing
c. Overdeveloping
d. Improper film processing
d. Improper film processing
Which of the following is NOT a cause for excessive film density?
a. Insufficient time in the developer
b. Excessive time in the developer
c. Fogged film
d. Excessive radiation
a. Insufficient time in the developer
Three factors to keep us safe in regards to working with radiation are:
What are Time, Distance, & Shielding?
When the double-wall/single-image (DWSI) technique is used on a pipe, the IQI shall be based on:
a. Single-wall thickness
b. Double-wall thickness
c. Outside diameter (OD)
d. Inside diameter (ID)
a. Single-wall thickness
The two different types ofImage quality indicators (IQIs) are:
What are Hole and Wire IQI's
This material is used to line a gamma source camera and is typically itself surrounded by lead.
What is depleted Uranium?
Diaphragms and collimators are typically made of what materials?
What are dense materials such as lead or
tungsten?
The mathematical formula to determine safe distances to be from a radiation source is called:
What is the Inverse Square Law?
Which of the following is equivalent to a 600 mAs exposure?
a. 20 mA for 3 min.
b. 15 mA for 1 min.
c. 10 mA for 2 min.
d. 5 mA for 2 min.
d. 5 mA for 2 min.
These cool devices used while exposing radiographic film Emit light, exposing film more quickly.
What is a Fluorescent Screen?