Category: Safety-26 Radiation output from a diagnostic tube is measured in which of the following units of measurement?

Category: Procedures-10 In order to demonstrate intestinal fluids or free air in the abdomen, radiographic images should be obtained in AP or lateral projections with the patient in all of the following positions EXCEPT:

Category: Safety-17 The minimum total amount of filtration for a 90 kVp beam is:

Category: Safety-44 An older x-ray tube that has evaporated tungsten deposited on the tube window may cause which of the following problems? Decreased tube output Increased half-value layer Arcing of the tube current

Category: Procedures-59 The Pearson method is an AP projection of the:

Category: Image Production-14 Recorded detail can be improved by decreasing: SID OID Motion unsharpness

Category: Image Production-7 In an x-ray machine, the induction motor is used to:

Category: Procedures-34 What anatomic structure is of primary interest when the head is in the lateral position and the central ray enters at the zygoma?

Category: Safety-21 Which of the following factors can affect the amount or the nature of radiation damage to biologic tissue? Radiation quality Absorbed dose Size of irradiated area

4. Steam in a heating system flows through tubes whose outer diameter is and whose walls are maintained at a temperature of . Circular aluminum alloy fins () of outer diameter and constant thickness are attached to the tube, as shown in the figure. Heat is transferred to the surrounding air at , with a combined heat transfer coefficient of . (a). (4 pts) Determine the heat transfer rate for a single fin if the fin efficiency of a single fin is known to be