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Assignment Questions - 14177_114
Assignment Questions - 14177_116

Neets Module 05-Introduction to Generators and Motors
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3 1-17.   What type of dc generator application best utilizes the features of the lap- wound armature? 1.     High-voltage 2.     High-current 3.     High-speed 4.     Variable-speed 1-18.   Which of the following is NOT a major classification of dc generators? 1.     Compound-wound 2.     Series-wound 3.     Shunt-wound 4.     Lap-wound 1-19.   What characteristic of series-wound generators makes them unsuitable for most applications? 1.     They require external field excitation 2.     The output voltage varies as the speed varies 3.     They are not capable of supplying heavy loads 4.     The output voltage varies as the load current varies 1-20.   As the load current of a dc generator varies from no-load to full-load, the variation in output voltage is expressed as a percent of the full-load voltage. What term applies to this expression? 1.     Gain 2.     Voltage control 3.     Voltage regulation 4.     Load limit 1-21.   When two or more generators are used to supply a common load, what term is applied to this method of operation? 1.     Series 2.     Compound 3.     Split-load 4.     Parallel 1-22.   What special-purpose dc generator is used as a high-gain power amplifier? 1.     Lap-wound 2.     Shunt-wound 3.     Amplidyne 4.     Compound-connected 1-23.   The gain of an amplifying device can be determined by which of the following formulas? 1.     GAIN = INPUT + OUTPUT 2.     GAIN = INPUT OUTPUT 3.     GAIN = OUTPUT - INPUT 4.     GAIN = OUTPUT + INPUT 1-24.   The maximum gain possible from an amplidyne is approximately 1.          100 2.       5,000 3. 10,000 4. 50,000 1-25.   What determines the direction of rotation of a dc motor? 1.     The type of armature 2.     The method of excitation 3.     The number of armature coils 4.     The polarity of armature current and direction of magnetic flux 1-26.   When you use the right-hand rule for motors, what quantity is indicated by the extended forefinger? 1.    Direction of flux north to south 2.    Direction of flux south to north 3.    Direction of current 4.    Direction of motion






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