Desktop PC Power Supply Installation and Troubleshooting

Auto audio on: the next questions will be read aloud when you click Continue.

1. 1

   What is the primary function of a desktop PC power supply unit?

   A Convert AC input into regulated DC voltages for computer components B Convert digital instructions into data stored by the computer C Control communication between the processor and system memory
2. 2

   Which power connector is highlighted on the motherboard?

   

   A 15-pin SATA power connector B 24-pin ATX main power connector C 8-pin PCIe graphics power connector
3. 3

   The image shows an eight-pin power cable connected near the processor socket. Which type of cable is it?

   

   A SATA device power cable B PCIe 6+2 graphics power cable C EPS12V 4+4 processor power cable
4. 4

   A multimeter shows 11.10 V while testing the PSU's +12 V rail. Under the standard ±5% ATX tolerance, how should this result be interpreted?

   

   A It is below tolerance and indicates a potential PSU problem B It is within the normal +12 V tolerance C It proves the PSU is operating correctly under every load
5. 5

   When measuring a PSU output with a multimeter, where should the black probe normally be connected?

   

   A To a red +5 V conductor B To a black ground conductor C To the green PS_ON conductor
6. 6

   What can a successful paperclip test establish about an ATX power supply?

   A Every voltage rail remains stable at the PSU's maximum rated load B The motherboard and processor are free from electrical faults C The PSU can be commanded to start, but not that it works correctly under load
7. 7

   A PC operates normally during light use but abruptly powers off when a high-end graphics card is heavily loaded. What should be investigated first?

   A Whether the PSU has adequate capacity and stable PCIe power delivery B Whether the monitor's refresh rate matches the desktop setting C Whether the keyboard is connected through a USB hub
8. 8

   What does an 80 PLUS certification primarily describe?

   A The PSU will always deliver at least 80% of its labeled wattage B The PSU meets specified energy-efficiency targets at defined loads C The PSU can operate safely at 80°C continuously
9. 9

   Why should a modular cable from one PSU model not be connected to another PSU merely because its plug fits?

   

   A The borrowed cable will force the PSU to run only in standby mode B Modular plugs automatically reduce available output wattage C PSU-side pin assignments can differ and may damage connected hardware
10. 10

    A modern PSU fan does not spin while the computer is idle, but the system remains stable. What is the most likely explanation?

    A A semi-passive mode keeps the fan off at low temperature or load B The PSU is supplying only +5 V and has disabled its +12 V rail C The motherboard has switched the PSU from AC power to battery power
11. 11

    What is the safest action when an unplugged PSU is suspected of having failed internally?

    A Open it immediately and test the large capacitors by hand B Replace it or send it to a qualified repair specialist without opening it C Bypass its internal fuse and reconnect it to AC power