Technician A says that a magnetic field is created in the alternator rotor. Technician B says that alternator output is increased if the speed of the generator is decreased. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
A
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The symbol above denotes a limit switch that is ____.
a. Normally Open in the Unoperated Condition b. Normally Open in the Operated Condition c. Normally Closed Held Open d. Normally Open Held Closed
Answer the following statement(s) true (T) or false (F)
1. Changing frequency causes a corresponding change in the inductive reactance of the windings. 2. Alternators are often used to control the speed of several induction motors that require different changes in speed. a. True 3. The Insulated Gate Bipolar Transistor (IGBT) is a current controlled device, not a voltage controlled device 4. Inverter rated motors are specifically designed to be operated by variable frequency drives. 5. Ramping permits the motor to bring the load up to speed slowly as opposed to simply connecting the motor directly to the line.
The purpose of the air occupant restraint controller is to
A. supply back-up power to the system. B. determine if there is a fault in the system. C. monitor the system. D. All of the above.
____ determines the minimum number of receptacles in a given dwelling.
A. Total load B. Wall space C. Total branching D. Available grounding