11-69.
11-70.
11-71.
11-72.
In a disk memory set, the data bus control
unit gives the highest priority to which of the
following transfer requests?
1. Disk control logic and buffer memory
2. Processor input and output holding
register
3. Input/output channel
4. Computer generated input data
In a disk memory set, data is written on the
disk using which of the following encoding
methods?
1.
2.
3.
4.
Phase encoding
Non-return-to-zero
Non-return-to-zero-indiscrete
Modified frequency modulation
Which of the following speeds is the
minimum speed required for the heads of a
disk memory set to load?
1. 3,000 rpm
2. 3,100 rpm
3. 3,200 rpm
4. 3,600 rpm
In a disk memory set, if the disk drive
motor’s speed drops below 3,100, which
of the following events will occur?
1.
2.
3.
4.
The heads will crash into the disk
The heads will automatically unload or
retract
The disk memory set will automatically
turn off power
The disk memory set will continue to
operate normally
11-73.
11-74.
11-75.
The speed of the drive motor in a disk
memory set is sensed by which of the
following devices?
1. A tachometer
2. A magnetic switch
3. An optical switch
4. A laser switch
The static ground spring mounted on the
lower end of the spindle assembly serves
which of the following functions?
1.
2.
3.
4.
Protects the disk from a buildup of static
electricity
Provides power to the spindle
Maintains proper pressure of the spindle
and the disk
Provides a static charge to the spindle
Which of the following assemblies are NOT
part of the actuator assembly?
1.
2.
3.
4.
Carriage and voice coil assembly
Rail bracket assembly
Head/arm assemblies
Magnet assembly
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