Describe positron emission tomography (PET) and how it is used.
What will be an ideal response?
PET uses a short-lived radioactive tracer, such as fluorine-18, as part
of a tissue-metabolized compound, such as glucose, to be scanned.
PET works using these five steps:
1. The compound is injected into the bloodstream of the person.
2. The body metabolizes it concentrating it in the target tissue.
3. The radioactive part decays, producing positrons (the antimatter
counterpart of electrons), and these positrons interact with electrons
at the site, destroying both of them.
4. The destruction of the electrons produces photons (light).
5. The imaging scanner detects the light produced and a computer
compiles this information, producing a 3-D image or map of
functional body processes. PET can detect abnormal body processes,
such as abnormal thickening of the aorta wall indicating developing
heart disease.
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Technician A says the elimination of the replaceable PROM chip was part of the OBD II legislation to prevent the use of aftermarket high-performance PROMs. Technician B says that many updates for engine performance concerns can be performed during service by changing the PROM chip. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
What are the three functions of the ignition system?
What will be an ideal response?
Market research and laboratory studies are essential tools of product development and the information collected can later be used by the advertising and sales forces.
Answer the following statement true (T) or false (F)
Describe how the Hall effect is produced using the Hall generator.
What will be an ideal response?