1 torque - The force that produces rotation

2 the strength of the magnetic field, the number of turns on the coil, and the position of the coil in the field. - The amount of torque developed in a coil depends on several factors including ___

3 split field motor - One method for reversing the direction of rotation employs two field windings wound in opposite directions on the same pole.

4 dc motor - is a rotating machine that transforms direct-current electrical energy into mechanical energy.

5 rheostat - is used to control the speed of shunt motor and it is connected in series with the field winding.

6 split field method - is the process of reversing the direction of rotation employs two field windings wound in opposite directions on the same pole.

7 switch field method - this type of motor reversal employs a double-pole, double-throw switch that changes the direction of current flow in either the armature or the field.

8 copper losses - occur when electrons are forced through the copper armature and field windings.

9 hysteresis losses - result from the armature revolving in an alternating magnetic field and becoming magnetized in two directions.

10 eddy current losses - occur because the armature's iron core acts as a conductor revolving in a magnetic field.  

11 air-cooled - The AC alternators used in large jet-powered aircraft are of the brushless type and are

Usually ____

12 constant speed drive - is used to ensure the alternator rotates at the correct speed to ensure a 400-Hz frequency

13                 ampere-hours - Capacity is measured in ____

14       clean and tight - One of the most important aspects of battery servicing is keeping the battery____

15                 three – how many types of dc generators are there?

16 Battery - converts chemical energy into electricity it is consists of one or more voltaic cells connected in series.

17 Lead-Acid Battery - has traditionally been the most popular type used in smaller aircraft.

18 Nickel-Cadmium or Ni-Cad Battery - has a very distinct advantage that its internal resistance is very low, so its voltage remains constant until it is almost totally discharged.

19 Rectifier - in an electrical system change alternating current (AC) to direct current (DC).

20 Capacity of Battery – a battery’s ability to produce a given amount of current for a specified time.

POINTERS TO REVIEW

1. Electricity is the electromagnetic induction movement of electrons through wires (conductors) to create an electric current. T

2. Field coil is the magnetizing force inside a generator is produced by an electromagnet consisting of a wire coil. T

3. Armature reaction is the distortion of lines of magnetic flux between the poles of the generator. T

4. Frame has two primary functions: 1) It completes the magnetic circuit between the poles, and 2) It acts as a mechanical support for the other parts. T

5. Voltage Regulator is used to control generator output voltage. T

6. Reverse-Current Relay the third unit of a three-unit regulator is used to prevent current from leaving the battery and feeding the generator. T

7. AC alternators have the same function as DC generators. F

(DC Alternators)

8. DC alternators are lighter and more efficient than DC generators. T

9. When installed on most aircraft, the output of a generator typically flows to the aircraft's bus bar where it is distributed to the various electrical components. T

10. If an aircraft has a 60-amp generator installed, the maximum continuous load that can be placed on the electrical system is 48 amps. T

11. The generator control system is designed to keep the generator output within limits for all flight variables. T

12. Aircraft generator output can easily be adjusted through control of the generators magnetic field strength. T

Remember, the strength of the magnetic field has a direct effect on generator output. T

13. The electrical protection system compares the sampled voltage to a reference voltage. F (Over Voltage Protection)

14. This function of a control system is designed to ensure all generator voltage values are within open tolerance before being connected to the load bus. F (Close Tolerance)

15. A typical alternator control circuit for low-output generators modifies current flow to the generator field to control generator output power. F (Typical Generator)