4-11. For referencing input power aboard ship, which of
the following documents should you use?
1. MIL-STD-1399, Section 300A
2. MIL-STD-480
3. MIL-HDBK-411
4. Each of the above
4-12. Where does the input line voltage go before it is
received by the transformer section of the
computer’s power supply?
1. To the rectifier section
2. To the ON/OFF switch
3. To the blower fan
4. To the filter section
IN ANSWERING QUESTIONS 4-13 THROUGH 4-20,
SELECT THE POWER SUPPLY SECTION THAT
MATCHES THE CHARACTERISTIC DESCRIBED IN
EACH QUESTION.
1. Regulator
2. Rectifier
3. Filter
4. Transformer
4-13. Isolates the power supply from the input line
voltage.
4-14. Provides regulated power to additional circuits for
further filtering and/or conversion.
4-15. Converts an ac input signal to pulsating dc voltage
or ripple.
4-16. Steps up the input line voltage.
4-17. Maintains the output of the power supply at a
constant level.
4-18. Provides the necessary power for the bus system
terminating resistors.
4-19. Removes pulsating dc ripple and produces a
useable dc voltage.
4-20. Provides dc power to the backplane wire harness,
and to remote, operator, and maintenance
consoles.
4-21. The voltage levels and logic convention for
mainframe and minicomputers are identical.
1. True
2. False
4-22. The output of the computer’s power supply can be
distributed by which of the following sections?
1. Rectifier only
2. Regulator only
3. Both rectifier and regulator
4. Filter
4-23. The power supply must protect the computer from
which of the following elements?
1. Incoming power
2. Distributed power
3. Internal cabinet and/or module temperature
4. All of the above
4-24. A power supply will shut off while the computer is
running under what condition(s), if any?
1. A low overtemperature condition
2. A high overtemperature condition only
3. A high overtemperature condition and an
overcurrent condition
4. None
IN ANSWERING QUESTIONS 4-25 THROUGH 4-31,
SELECT FROM THE FOLLOWING LIST THE
SIGNAL GENERATED UNDER THE SPECIFIC
CONDITION DESCRIBED IN EACH QUESTION.
1. POWER INTERRUPT (PI)
2. MASTER CLEAR (MC), AUTOMATIC
3. STOP
4-25. Used for computer initialization after power has
been applied.
4-26. Source power falls below specifications and
returns to normal.
4-27. Generates a class I interrupt.
4-28. Logic power goes out of tolerance.
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