In X-radiography, the ability to penetrate the test object is governed by:

Almost all gamma radiography is performed with:

What does the term R/h refer to when speaking of intensity?

Penetrameters for ________ are considered Group I Materials and do not need to have an identification notch

The best X-rays efficiency is produced when the target material has a:

X-ray tube current is controlled by:

An unshielded isotope source gives a dosage rate of 900 milliroentgen per hour at 3 m. What would the unshielded dosage rate be at 9 m?

The purpose of fixation is:

An excellent radiograph is obtained under given conditions of exposure with the film located at a distance of 91 centimetres from the target of the X-ray tube. If the film is now placed only 46 centimetres from the target, and all exposure conditions except time are held constant, the new exposure time will be:

The lead symbol B is attached to the back of the film holder to determine:

Two X-ray machines operating at the same nominal kilovoltage and milliamperage settings:

A properly exposed radiograph that is developed in a developer solution at a temperature of 14.4 degrees Celsius (58 degrees Fahrenheit) for 5 minutes will probably be:

Scattered radiation caused by any material, such as a wall or floor, on the film side of the specimen is referred to as:

The duration of an X-ray exposure is usually controlled by:

The intensity of X- or gamma radiation is measured in:

A densitometer is an instrument for measuring

X-rays and gamma rays always travel in:

Kilovoltage, exposure time, and source-to-film distance are three of the most important X-ray exposure factors that can be controlled. A fourth such exposure factor is:

The primary parts of an atom are:

A graph showing the relation between material thickness, kilovoltage, and exposure is called:

The radiation quality of a gamma ray source is:

The fact that gases, when bombarded by radiation, ionize and become electrical conductors make them useful in:

Low voltage X-ray tubes are generally fitted with windows made of:

An advantage of the pocket dosimeter type of ionization chamber used to monitor radiation received by personnel is:

The term used to express the number of curies of radioactivity per gram or ounce of source weight is: