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Q 1-b: Multiple Choice Questions "Answer 6 Question ONLY" (12 Mark) 1. Two alternators are to be put in parallel. Which of the following factors should be identical for both? A. Frequency B. Phase sequence C. Voltage D. All of the above 2. If two alternators are running in proper synchronism and the voltage of one machine is suddenly increased A. Both machines will stop B. One machines will stop C. Synchronising torque will be produced to restore further synchronism D. None of the above 3. Alternators are usually designed to generate A. Definite currents B. Definite power factor C. Variable frequencies D. Definite frequencies 4. In an alternator, the armature reaction will be completely magnetizing in case the load power factor is A. Zero lagging B. Zero leading C. 0.866 D. Unity 5. When the speed of an alternator increases A. The frequency decrease B. The frequency increases Page 1 of 2 C. The frequency remains same D. The frequency changes 6. In alternators the standrad practice, now a days is to have A. Rotating field B. Rotating armature C. Either of the above D. None of the above 7. An alternator is said to be over excited when it is operating at (A) unity power factor (B) leading power factor (C) lagging power factor (D) lagging to leading power factor