IN ANSWERING QUESTIONS 5-9 THROUGH 5-12, SELECT FROM COLUMN B THE CAUSE OF EACH TYPE OF MAGNETIC NOISE LISTED IN COLUMN A. 5-9. 5-10. 5-11. 5-12. A. TYPES OF NOISE Induced magnetic field Eddy current field Permanent magnet field Direct current circuit B. CAUSES 1. An aircraft electrical load change 2. The parts of an aircraft’s structure 3. An aircraft flight direction change 4. The current flow in the aircraft structure 5-13. Which of the following is NOT an axial coordinate term used to describe the direction of a magnetic field? 1. Vertical 2. Horizontal 3. Lateral 4. Longitudinal 5-14. Which of the following types of fields are constant for a given type of aircraft? 1. 2. 3. 4. Eddy current and direct current circuit Induced magnetic and permanent magnetic Eddy current and induced magnetic Permanent magnetic and direct current circuit 5-15. The detecting head is placed in a magnetically quiet area to compensate for what type of magnetic noise? 1. Permanent magnetic field 2. Induced magnetic field 3. Direct current circuit 4. Eddy current field 5-16. What type of magnetic noise is normally compensated for by the use of Permalloy strips? 1. Permanent magnetic field 2. Induced magnetic field 3. Direct current circuit 4. Eddy current field 5-17. Outrigger compensators of Permalloy are oriented near the detecting element to compensate for a magnetic field that varies under which of the following conditions? 1. 2. 3. 4. After major internal structural changes are made to the aircraft When the aircraft’s direct current load changes When the aircraft’s heading changes According to the rate at which a maneuver is conducted 5-18. Electrical coils are used to compensate for which of the following aircraft magnetic fields? 1. Permanent 2. Induced 3. Direct current circuit 4. Eddy current 5-19. Electromagnetic compensating loops are used to compensate for what aircraft magnetic field? 1. Permanent 2. Induced 3. Direct current circuit 4. Eddy current 32