Although there may be other reasons for using calcium tungstate screens in industrial radiography, they are most usually used to:

An excellent radiograph is obtained under given exposure conditions with a tube current of 5 mA and an exposure time of 12 minutes. If other conditions are not changed, what exposure time would be required if the X-ray tube current could be raised to 10 mA?

In film radiography, penetrameters are usually placed:

A densitometer is an instrument for measuring:

The two most common causes for excessively high-density radiographs are:

When doing gamma ray radiography with high-intensity emitters, the sources are best handled:

Lead foil in direct contact with X-ray film:

Fluorescent intensifying screens are usually mounted in pairs in rigid holders called:

Which of the following materials is suitable for use in vessels or pails and used to mix processing solutions?

Of the following, which would be especially sensitive to injury by excessive exposure to X or gamma rays?

A penetrameter is used to indicate the:

A fluorescent intensifying screen will:

Static marks, which are black tree-like or circular marks on a radiograph, are often caused by

The purpose of agitating an X-ray film during development is to:

The exposure of personnel to X- and gamma radiation can be measured or monitored by means of:

Assuming that a good radiograph is obtained at a setting of 10 mA in 40 s, how much time will be necessary to obtain one equivalent radiograph if the milliamperage is changed to 5 mA (all other conditions remaining constant) ?

Why is Co-60 used as radiation source for medium-weight metals of thickness ranges from 38 to 229 mm (1.5 to 9 inches)?

During manual film processing, the purpose of the stop bath is:

What is sometimes used to change the alternating current from the high voltage transformer to direct current for the purpose of increasing the X-ray machine output?

Approximately, what percent of the original radioactivity is left after 6 half-lives?