Power Supply and Voltage Settings Quiz

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Questions and Answers

What is the best practice when working inside a computer?

  • Keep everything plugged in for easy access
  • Always disconnect from the power source (correct)
  • Work with gloves to avoid shocks
  • Connect yourself to the electrical ground

What should you do even after unplugging from the power source due to capacitors in some components?

  • Touch all components to discharge any remaining power
  • Ignore the capacitors as they pose no risk
  • Follow the manufacturer's instructions to dissipate all power (correct)
  • Immediately reconnect to the power source

What type of power do computer motherboards and components commonly use?

  • Static electricity
  • Mechanical power
  • Direct Current (DC) power (correct)
  • Alternating Current (AC) power

Why is it important not to connect yourself to any part of the electrical ground system?

<p>To avoid electric shocks (C)</p> Signup and view all the answers

What is the recommended approach to determine the proper size of a power supply for your system?

<p>Use a power calculator available on websites (A)</p> Signup and view all the answers

Why might it be beneficial to double the calculated wattage when selecting a power supply?

<p>To ensure that the power supply runs efficiently (B)</p> Signup and view all the answers

When might it be necessary to manually calculate the wattage needed for a power supply?

<p>When using an old or proprietary system (D)</p> Signup and view all the answers

What information can be found in the documentation of a discrete video card that helps in selecting an appropriate power supply?

<p>Recommended power supply wattage (D)</p> Signup and view all the answers

What component inside a computer system converts AC power to DC power?

<p>Power supply (A)</p> Signup and view all the answers

What is the rate of electrons passing by a particular point in one second known as?

<p>Amperes (B)</p> Signup and view all the answers

What is the measurement used to quantify the force pushing electrons through a wire?

<p>Volts (C)</p> Signup and view all the answers

In terms of power supplies, what is a watt used to measure?

<p>Real power use (A)</p> Signup and view all the answers

Which type of current constantly alternates direction?

<p>Alternating current (A)</p> Signup and view all the answers

What is the frequency of alternating current commonly found in the US and Canada?

<p>60 hertz (C)</p> Signup and view all the answers

What happens if you plug a manually switched 120 volt power supply into a 230 volt source?

<p>Sparks and smoke will be generated (A)</p> Signup and view all the answers

What should you set the switch on the back of the power supply to before reconnecting the power?

<p>120 volts (C)</p> Signup and view all the answers

What is a characteristic of direct voltage mentioned in the text?

<p>Can be positive or negative (D)</p> Signup and view all the answers

Which components inside the system are commonly associated with higher voltages?

<p>PCI Express adapters (C)</p> Signup and view all the answers

What is the Standby voltage used for in a computer system?

<p>To provide power when the system is in hibernate mode (B)</p> Signup and view all the answers

What type of voltage might some older components on a system require?

<p>-12 volts (A)</p> Signup and view all the answers

What does the 24-pin connector provide to the motherboard?

<p>+12 volts (D)</p> Signup and view all the answers

What happens if you plug in a 24-pin connector to an older motherboard?

<p>The four pins at the end will not be connected (C)</p> Signup and view all the answers

How can you remove the power connector from the motherboard?

<p>Push down on the clip and remove the entire connector (A)</p> Signup and view all the answers

In a data center or with servers, how are the loads distributed between multiple power supplies when both are plugged in?

<p>Load is evenly distributed across both power supplies (D)</p> Signup and view all the answers

What does hot-swappable mean in relation to power supplies?

<p>The power supplies can be replaced without powering down the server (C)</p> Signup and view all the answers

How do modular power supplies differ from non-modular ones?

<p>Modular power supplies allow you to choose which connections to use (B)</p> Signup and view all the answers

What is one advantage of having a completely modular power supply in your system?

<p>Better customization of cable connections (C)</p> Signup and view all the answers

How would you typically size a power supply for a system?

<p>According to how many watts it can handle (A)</p> Signup and view all the answers

What happens if you purchase a high-wattage power supply compared to what's needed for your system?

<p>'Additional capacity doesn't change overall speed or efficiency' (B)</p> Signup and view all the answers

'Hot-swappable' refers to:

<p>'Power supplies that can be replaced without powering down the server' (B)</p> Signup and view all the answers

'Modular' power supplies allow you to:

<p>'Choose exactly which cables or connections to use' (B)</p> Signup and view all the answers

'Balancing the maximum capacity of a power supply with how much power you’re going to need' is important because:

<p>'It avoids overloading or underutilizing the power supply' (C)</p> Signup and view all the answers

What do the fixed wires of a hybrid version of a fixed and modular power supply do?

<p>Securely attach all connectors permanently (C)</p> Signup and view all the answers

Flashcards

Best practice for working inside a computer

Always disconnect the computer from the power source before working on it.

Dissipating power after unplugging

Even after unplugging, some components may still have residual power due to capacitors. Follow the manufacturer's instructions to ensure all power is dissipated.

Power type used in computers

Most computer motherboards and components use Direct Current (DC) power.

Avoiding electric shocks

Never connect yourself to any part of the electrical ground system while working inside a computer.

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Determining power supply size

Use a power calculator on websites to determine the right size power supply for your system.

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Power supply sizing rule

Double the calculated wattage when selecting a power supply to ensure efficient and stable operation.

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Manually calculating power supply wattage

If you're working with an old or proprietary system, you may need to manually calculate the wattage needed for the power supply.

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Finding recommended power supply wattage

Check the documentation of a discrete video card for the recommended power supply wattage.

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Role of the power supply

The power supply inside a computer converts AC power from the wall to DC power used by the motherboard and components.

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Amperes (Amps)

Amperes (Amps) measure the rate of electron flow through a wire.

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Volts

Volts measure the electrical potential difference that pushes electrons through a wire.

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Watts

Watts measure the actual power used by a device, like a computer power supply.

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Alternating Current (AC)

Alternating Current (AC) continually changes direction, flowing back and forth.

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Frequency of AC power

The frequency of AC power in the US and Canada is 60 Hertz, meaning it changes direction 60 times per second.

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Plugging into the wrong voltage

Plugging a 120-volt power supply into a 230-volt source can cause sparks, smoke, and potentially damage the power supply.

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Setting the power supply switch

Set the switch on the back of the power supply to 120 volts before reconnecting the power.

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Characteristics of Direct Current (DC)

Direct Current (DC) power flows in a single direction and can be positive or negative.

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Higher voltages in computer systems

Components like PCI Express adapters often use higher voltages.

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Standby voltage

Standby voltage provides power to the system when it's in hibernate mode, allowing it to quickly resume.

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Negative voltage in computers

Some older components may require a negative 12-volt supply.

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24-pin connector power

The 24-pin connector on a motherboard provides +12 volts to various components.

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24-pin connector compatibility

Connecting a 24-pin connector to an older motherboard might not connect the last four pins, but can still function for the most part.

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Removing power connector

To remove the power connector from the motherboard, push down on the clip and pull the entire connector off.

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Load distribution in servers

In data centers and servers, loads are evenly distributed between multiple power supplies when both are plugged in.

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Hot-swappable power supplies

Hot-swappable power supplies can be replaced without powering down the server, providing continuous operation.

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Modular power supplies

Modular power supplies allow users to choose which specific cables and connections to use.

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Advantages of modular power supplies

A completely modular power supply allows for better customization and cable management in a system.

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Sizing a power supply

Size a power supply based on the total wattage it can handle to ensure sufficient power for your system.

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High-wattage power supply benefits

A high-wattage power supply won't make your system faster or more efficient, but provides extra capacity for future upgrades or demanding workloads.

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