This is where control rods come in. The control rods are lowered into the reactor to absorb some of the neutrons produced during fission reactions to keep the ratio under control. As the temperature rises, the rods are lowered, and as the temperature drops, the rods are raised to allow more fission reactions to occur. In an emergency where the reactor appears to be getting out of control, the rods are fully lowered into the reactor to shut it down altogether. Also known as absorption rods, nuclear reactor control rods are designed to operate even during a crisis situation in which a human being is not available.
Noun. 1. rhetorical device-a use of language that creates a literary effect (but often without regard for literal significance). rhetoric-study of the technique and rules for using language effectively (especially in public speaking). device-something in an artistic work designed to achieve a particular effect.itotes, meiosis-understatement for rhetorical effect (especially when expressing an affirmative by negating its contrary); saying `I was not a little upset' when you mean `I was very upset' is an example of litotes.
Transitional devices are like bridges between parts of your paper. They are cues that help the reader to interpret ideas a paper develops. Transitional devices are words or phrases that help carry a thought from one sentence to another, from one idea to another, or from one paragraph to another. And finally, transitional devices link sentences and paragraphs together smoothly so that there are no abrupt jumps or breaks between ideas. There are several types of transitional devices, and each category leads readers to make certain connections or assumptions. Some lead readers forward and imply the building of an idea or thought, while others make readers compare ideas or draw conclusions from the preceding thoughts.