No. Usually not unless there was calcification in the artery walls that shows up on plain film. Otherwise ct scan.
Sometimes. If wall of aneurysm calcified. Ultrasound better.
Most of the time if. If the aneuryism has sufficient calcification in it's wall, it would be visualized on a routine film of the abdomen, if there is concern that the patient might have an aneuryism, the better imaging test would be a abdominal ultrasound. If an aneuryism was found that was significant, usually over 5 cm in diameter, and ct angiogram would be done to determine the surgical approach.