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Assignment 11-Cont. - 14100_472
Assignment 11-Cont. - 14100_474

Fire Controlman Volume 03-Digital Data Systems
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11-32. 11-33. 11-34. 11-35. 11-36. The head actuator assembly in a floppy disk drive has what purpose? 1. To retract the heads so the disk can be removed  from  the  drive  only 2. To move the heads to the proper position on the   disk 3. To enable the write heads 4. To enable the read heads The two read/write heads in a floppy disk drive move independently of one another. 1.  True 2.   False Which of the following is a description of the construction of the read/write heads in a floppy disk drive? 1. 2. 3. 4. They are made of a hard ferrous material with electromagnetic coils for reading and writing They are made of a soft ferrous material with electromagnetic coils for reading and writing They are made of plastic with electromagnetic coils for reading and writing They are made of a hard ferrous material only and do not need any coils The write head is centered between two erase heads for which of the following reasons? 1. To erase the previous data before new data is   written 2. To cancel the write current when a read operation is performed 3. To ensure that data being written does not spill over to adjacent tracks 4. To erase the previous data after the new data is   written The number of tracks per inch that can be reliably written on a disk is called the 1. linear coercivity 2.  longitudinal  coercivity 3. linear density 4.  longitudinal  density 11-37. 11-38. 11-39. 11-40. 11-41. 11-42. The number of bits per inch that can be reliably written on a track is called the 1. linear coercivity 2.  longitudinal  coercivity 3. linear density 4.  longitudinal  density The strength of the magnetic field required to properly record data on a magnetic medium is referred to by which of the following terms? 1.  Coercivity 2.  Oersteds 3.  Density 4.  Ferrous Oersteds are used to make what type of measurements? 1. 2. 3. 4. Magnetic field strength Permeability of a ferrous material Magnetic density Magnetic polarity A 5.25-inch floppy disk that is labeled as DSDD has a maximum data capacity of 1. 180 kilobytes 2. 360 kilobytes 3. 720 kilobytes 4. 1.2 megabytes The track width of a 3.5-inch floppy disk is 1.  0.l15  mm 2. 0.16 mm 3. 0.33 mm 4. 0.45 mm Reading a 5.25-inch, 360K disk in a 1.2M disk drive will cause what problem, if any? 1. The disk drive will read the disk with massive read errors 2. The disk drive will be unable to read the disk at   all 3. The 360K disk will not fit into a 1.2M disk drive 4. No problem; the disk drive will read the disk normally 77






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