5. State what component causes a generator to produce direct current rather than alternating current. 6. Identify the point at which the brush contact should change from one commutator segment to the next. 7. State how field strength can be varied in a dc generator. 8. Describe the cause of sparking between brushes and commutator. 9. State what is meant by armature reaction. 10. State the purpose of interpoles. 11. Explain the effect of motor reaction in a dc generator. 12. Explain the causes of armature losses. 13.
There are three main types of fat in food: saturated, monounsaturated, and polyunsaturated. Other types of fat are cholesterol and fats formed during processing of unsaturated oils (hydrogenated fat and trans-fat).Saturated Fat. The saturated form of fat is usually solid at room temperature.onounsaturated Fat. Monounsaturated fats appear to lower bad cholesterol levels in our blood while increasing good cholesterol. Olive oil is one of the richest sources of monounsaturated fat. Other food sources are canola or peanut oil; margarines made from olive, canola, or peanut oil; and nuts and seeds.
Polyunsaturated and monounsaturated fat are both unsaturated fats. âPolyâ means many unsaturated chemical bonds and âmonoâ means one unsaturated chemical bond. These unsaturated fats are often found in liquid vegetable oils. Polyunsaturated oils are liquid at room temperature and in the refrigerator. Common sources of polyunsaturated fat are safflower, sesame and sunflower seeds, corn and soybeans, many nuts and seeds, and their oils.