A+ Form Factors And Power Supplies Chapter 4 Test

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A+ Form Factors And Power Supplies Chapter 4 Test - Quiz

A computer is made up of a lot of components and needs power to operate. A form factor refers to the size, shape, and packaging of a hardware device. Server computers typically come in one of three form factors. The quiz below tests what you understood from the chapter on form factors. Give it a try!


Questions and Answers
  • 1. 

    Which of the following drives the decision on which form factor to use?

    • A.

      CPU

    • B.

      Motherboard

    • C.

      CD-ROM

    • D.

      Peripheral devices

    Correct Answer
    B. Motherboard
    Explanation
    The motherboard drives the decision on which form factor to use because it determines the physical layout and size of the computer system. Different motherboards support different form factors, such as ATX, micro ATX, or mini ITX. The form factor of the motherboard determines the size and shape of the computer case, as well as the compatibility of other components such as the CPU and peripheral devices. Therefore, the motherboard is the primary factor that influences the choice of form factor for a computer system.

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  • 2. 

    Which of the following is the latest form factor?

    • A.

      NLX

    • B.

      BTX

    • C.

      ATX

    • D.

      Baby AT

    Correct Answer
    B. BTX
    Explanation
    BTX (Balanced Technology eXtended) is the latest form factor. It was introduced by Intel as an improvement over the ATX form factor. BTX offers better cooling and noise reduction capabilities compared to ATX, as it features a redesigned layout and airflow system. It also supports newer technologies such as PCI Express and Serial ATA. NLX and Baby AT are older form factors that have been largely replaced by ATX and BTX.

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  • 3. 

    Which of the following electronic device holds an electrical charge for a period of time and smooths the uneven flow of electricity through a circuit?

    • A.

      Transistor

    • B.

      Resistor

    • C.

      Capacitor

    • D.

      Diode

    Correct Answer
    C. Capacitor
    Explanation
    A capacitor is an electronic device that can store electrical charge for a period of time. It consists of two conductive plates separated by an insulating material. When a voltage is applied across the plates, one plate accumulates positive charge while the other accumulates negative charge. This stored charge can then be released when needed, smoothing out the uneven flow of electricity through a circuit. Therefore, a capacitor is the correct answer for the given question.

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  • 4. 

    Which of the following electronic devices protects equipment against sudden changes in power level?

    • A.

      Joule meter

    • B.

      Advanced Configuration and Power Interface (ACPI)

    • C.

      Electromagnetic Interference Suppressor

    • D.

      Surge protector

    Correct Answer
    D. Surge protector
    Explanation
    A surge protector is an electronic device that safeguards equipment from sudden changes in power level, such as power surges or spikes. These power fluctuations can occur due to lightning strikes, power outages, or electrical faults. Surge protectors work by diverting excess voltage away from the connected devices, preventing damage to them. They typically have multiple outlets and may also include features like surge suppression and noise filtering to provide additional protection. Therefore, a surge protector is the correct answer for protecting equipment against sudden changes in power level.

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  • 5. 

    True or False?  The form factor describes the size, shape, and major features of a hardware component.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The form factor refers to the physical characteristics of a hardware component, including its size, shape, and major features. This includes factors such as the dimensions, mounting options, and connectors present on the component. Therefore, the statement "The form factor describes the size, shape, and major features of a hardware component" is true.

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  • 6. 

    True or False?  Using a soft switch, an OS such as Windows XP can turn off the power to a system after the shutdown procedure is done.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Using a soft switch, an operating system like Windows XP can turn off the power to a system after the shutdown procedure is done. This means that the operating system has the capability to control the power supply and initiate a complete shutdown of the system, including cutting off the power. This feature allows for a more efficient and convenient shutdown process, as it eliminates the need for manually turning off the power after shutting down the system.

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  • 7. 

    True or False?  BTX motherboards cannot use an ATX power supply.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement "BTX motherboards cannot use an ATX power supply" is false. BTX motherboards are designed to be compatible with ATX power supplies. The BTX form factor was introduced as an alternative to the ATX form factor, but it still supports the use of ATX power supplies. This allows users to easily upgrade their system without having to replace the power supply.

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  • 8. 

    True or False?  Black wire is used for ground in PC's and DC circuits, as well as in home wiring and in AC circuits.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    False. In PC's and DC circuits, the black wire is commonly used for the negative or return path, while the ground wire is usually green or bare. In home wiring and AC circuits, the black wire is typically used for the hot or live wire, while the ground wire is green or bare.

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  • 9. 

    True or False?  A power supply is considered a field replaceable unit. 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    A power supply is considered a field replaceable unit because it is designed to be easily replaced in the field without requiring any special tools or expertise. This means that if a power supply fails or needs to be upgraded, it can be quickly and easily replaced by simply unplugging the old unit and plugging in a new one. This convenience and ease of replacement make power supplies a common example of field replaceable units in various electronic devices and systems.

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  • 10. 

    A computer case is also known as a ____________________.

    • A.

      Box

    • B.

      Container

    • C.

      Chassis

    • D.

      Profile

    Correct Answer
    C. Chassis
    Explanation
    A computer case is also known as a chassis. The term "chassis" refers to the framework or outer structure of a computer case that houses and protects the internal components of a computer system. It provides a sturdy and secure enclosure for the various hardware components such as the motherboard, power supply, storage devices, and cooling system. The chassis also often includes features such as expansion slots, drive bays, and ports for connecting peripherals.

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  • 11. 

    There are two types of backplanes: ________________ and _______________.  *Be sure to choose two answers!

    • A.

      Active

    • B.

      Flush

    • C.

      Protruding

    • D.

      Passive

    Correct Answer(s)
    A. Active
    D. Passive
    Explanation
    Active backplanes are capable of processing and controlling data, while passive backplanes simply act as a connector or interface between different components. Active backplanes have their own circuitry and can perform functions such as data routing, signal amplification, and protocol conversion. Passive backplanes, on the other hand, rely on external devices to perform these functions. Therefore, the correct answer is active and passive, as these are the two types of backplanes based on their functionality.

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  • 12. 

    When replacing a damaged motherboard with a good one, first test the __________________.

    • A.

      Video card

    • B.

      Memory

    • C.

      Transistors

    • D.

      Power supply

    Correct Answer
    D. Power supply
    Explanation
    When replacing a damaged motherboard with a good one, it is important to first test the power supply. This is because a faulty power supply can cause various issues such as insufficient power delivery to the components, leading to system instability or failure. By testing the power supply, one can ensure that it is functioning properly and providing adequate power to the motherboard and other components. This helps in preventing any potential damage to the new motherboard and ensures a smooth and successful replacement process.

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  • 13. 

    A measure of electrical current is called _______________.

    • A.

      Ohms

    • B.

      Amps or amperes

    • C.

      Watts

    • D.

      Whatts

    Correct Answer
    B. Amps or amperes
    Explanation
    The correct answer is "Amps or amperes." Amps or amperes is the unit used to measure electrical current. It represents the rate at which electric charges flow in a circuit. Ohms is the unit used to measure electrical resistance, watts is the unit used to measure power, and "whatts" is not a recognized unit of measurement.

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  • 14. 

    House current in the United States oscillates 60 times in on second (60 hertz).  Is this AC or DC current?

    • A.

      AC

    • B.

      DC

    Correct Answer
    A. AC
    Explanation
    The correct answer is AC (alternating current). In the United States, the house current oscillates 60 times per second, indicating a frequency of 60 hertz. AC current alternates its direction periodically, allowing for the efficient transmission of electricity over long distances. In contrast, DC (direct current) flows in one direction only and is commonly used in batteries and electronic devices.

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  • 15. 

    _________    _____________    travels in only on direction and is the type of current that most electronic devices require, including computers.

    • A.

      Direct current

    • B.

      Alternating current

    • C.

      Oscillating current

    • D.

      Neutral current

    Correct Answer
    A. Direct current
    Explanation
    Direct current is the correct answer because it travels in only one direction and is the type of current that most electronic devices require, including computers. Unlike alternating current, which constantly changes direction, direct current provides a consistent flow of electricity, making it ideal for powering electronic devices. Oscillating current and neutral current are not valid options as they do not accurately describe the type of current required by electronic devices.

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  • 16. 

    A _____________ is a material such as gold or copper, that easily conducts electricity.

    • A.

      Insulator

    • B.

      Conductor

    • C.

      Semiconductor

    • D.

      Semiinsulator

    Correct Answer
    B. Conductor
    Explanation
    A conductor is a material that easily conducts electricity, such as gold or copper. Conductors have a high number of free electrons that are able to move freely within the material when an electric field is applied. This allows for the easy flow of electric current through the conductor.

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  • 17. 

    A ______________ is a material, such as glass or ceramic, that resists the flow of electricity.

    • A.

      Conductor

    • B.

      Insulator

    • C.

      Semiconductor

    • D.

      Semiinsulatro

    Correct Answer
    B. Insulator
    Explanation
    An insulator is a material that does not allow the flow of electricity easily. It has high resistance to the flow of electric current. Materials like glass and ceramic are examples of insulators as they do not conduct electricity well. Unlike conductors, which allow electricity to flow through them easily, insulators prevent the flow of electrical charges, making them suitable for applications where electrical isolation is required.

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  • 18. 

    What does this symbol represent on an electrical diagram? 

    • A.

      Diode

    • B.

      Resistor

    • C.

      Capacitor

    • D.

      Ground

    Correct Answer
    B. Resistor
    Explanation
    This symbol represents a resistor on an electrical diagram. A resistor is an electronic component that limits the flow of electric current in a circuit. It is typically represented by a zigzag line in circuit diagrams. Resistor values are measured in ohms and they are used to control the amount of current flowing through a circuit and to adjust voltage levels.

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  • 19. 

    What does this symbol represent on an electrical diagram?          

    • A.

      Capacitor

    • B.

      Resistor

    • C.

      Diode

    • D.

      Ground

    Correct Answer
    D. Ground
    Explanation
    This symbol on an electrical diagram represents the ground. Ground is a reference point in an electrical circuit that is connected to the earth or a large conducting body, such as a metal water pipe or a grounding rod. It serves as a common return path for electric current and helps to prevent electrical shocks and equipment damage.

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  • 20. 

    ___________ is caused by the magnetic field produced as a side effect when electricity flows.

    • A.

      EMI

    • B.

      ESD

    • C.

      Diode

    • D.

      Surge

    Correct Answer
    A. EMI
    Explanation
    EMI stands for Electromagnetic Interference, which is caused by the magnetic field produced as a side effect when electricity flows. This interference can disrupt the normal functioning of electronic devices and can be caused by various sources such as power lines, motors, and radio signals. EMI can result in signal degradation, data loss, or even complete failure of electronic systems. Therefore, EMI is the correct answer in this case.

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