What is water hammer?
A. Pressure necessary to overcome friction inside a hydrant
B. An implosion of air pockets drawn into fire pumps connected to the system
C. A sudden surge in pressure caused when a discharge valve is turned off too quickly
D. When fire apparatus operating at low system pressure draws the entire capacity of the system
C
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Persons trained at the ____ level respond to possible hazardous materials/Weapons of Mass Destruction (WMD) incidents, identify the potential for a hazardous materials release, call for trained assistance, and stand by isolating the area and denying entry to other persons.
A. awareness B. operations C. incident commander D. technician
The correct revenue code listed in FL42 for immunology is 0302.
Answer the following statement true (T) or false (F)
You have completed a chest radiograph on a 2-month-old infant using a restraining device at a 72 1d SID. Because of the design of the device, your OID is suboptimum. The image reveals good resolution of the bony anatomy but the pulmonary vasculature is blurred. The EI value is 2040. In an effort to improve the quality of the repeat image, the competent radiographer would
a. raise the mA and decrease the exposure time. b. decrease the SID and maintain the same mAs. c. switch to small focal spot. d. ask for mild sedation of the infant to decease respiration.
The basic principle of MR physics involves an established relationship between an external magnetic field and the gyromagnetic ratio of an atom. This is expressed as the
a. inverse square law. b. Larmor equation. c. Hounsfield coefficient. d. H & D curve.