All questions are one- best-response type, in the multiple-choice format. Each consists of a stem (e.g., a question, pictorial material, etc.) followed by a series of four or five possible responses or options. The examinee is required to select the one best "option" among those offered. This type of question usually has a comparative sense, so that one answer is the best among those given. Other options in the set may be plausible or even partially correct, but not the best response or option. Samples follow:

Typical values of the band electron energy levels for tungsten are: K = 69.5 keV; L=12 keV;
M = 2 keV. The energy of the K a characteristic x-rays will be:

1. 10 keV.
2. 12 keV.
3. 57.5 keV.
4. 67.5 keV.
5. 69.5 keV.    

(The correct answer is "C)

The purpose of the ion exchange column in a Mo-Tc generator is to:

1. neutralize all the ions.
2. generate negative ions.
3. convert the Tc to pertechnetate.
4. retain the Mo ions during elution.
5. absorb the energy of Mo decay.                 

(The correct answer is "D")

A patient with suspected air embolism to the heart and great vessels should be placed in which position for treatment?

1. Supine
2. Erect
3. Right lateral decubitus
4. Left lateral decubitus
5. Prone                                                     

(The correct answer is "D")

In hyperparathyroidism, the three soft-tissue organs that most frequently show increased uptake of the bone-seeking agent Tc-99m MDP (methylene diphosphonate) are:

1. lungs, liver, and kidneys.
2. pancreas, thyroid, and adrenals.
3. stomach, lungs, and kidneys.
4. stomach, small intestine, and large intestine.
5.  liver, spleen, and adrenals.                 

(The correct answer is "C")

In computed tomography, the basic factor which sets a limit to differentiation between various tissues is the:

1. ability to provide x-ray beams with sufficient collimation.
2. effect of scattered radiation in reducing contrast.
3. accuracy of computer algorithms for reconstruction.
4. ability to design x-ray tubes with sufficiently high outputs.
5. dependence of statistical variations in photon transmission on patient dose.                                                                

(The correct answer is "E")