单选题Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）A The power supply is faulty and should be replaced.B The heat from a heating， ventilation， and air conditioning （H

题目
单选题
Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）
A

The power supply is faulty and should be replaced.

B

The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.

C

The radio frequency interference （RFI） is being received as noise.

D

A plasma display is emitting infrared noise.

相似考题

1.Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?A.Cooling the air to a temperature just above dew pointB.Heating the air to a point at which moisture will boil off ,then re-cooling itC.Cooling the air to a point below dew point, then reheating itD.Heating the air and then cooling it to a point below dew point

2.A user reports it takes a long time to load all applications and the hard drive LED is showing constant activity. Which of the following is MOST likely the issue?()A. The processor is faulty.B. The file system is fragmented.C. The modem drivers are corrupt.D. The power supply is faulty.

3.A technician suspects the AC voltage into a PC power supply is bad. Which of the following toolswould MOST likely be used to confirm the diagnosis?()A. MultimeterB. OscilloscopeC. Cable testerD. Power supply tester

4.The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A.Faulty thermostatic bypass valveB.Eroded zinc pencils in the heat exchangerC.Steam formation in the expansion tankD.Excessive leakage from jacket water pump seals

更多“单选题Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）A The power supply is faulty and should be replaced.B The heat from a heating， ventilation， and air conditioning （H”相关问题

  • 第1题：

    A technician has had several support requests for one PC. The technician has reseated the PCIcards and replaced the hard drive in the PC located in a school cafeteria kitchen. PCs located in the business office or the classrooms have not had this issue.Which of the following is MOST likely causing this PC’s issue?（）

    A. Faulty RAM

    B. 240 volt Kitchen outlets

    C. Power Brownouts

    D. Excessive Heat


    参考答案：D

  • 第2题：

    If a technician suspects that the voltage being delivered to a desktop computer’s power supply is insufficient or incorrect, which device should be used to determine the correct voltage?（）

    • A、A power supply tester
    • B、A multimeter
    • C、A loopback adapter
    • D、A cable tester

    正确答案:B

  • 第3题：

    Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）

    • A、The power supply is faulty and should be replaced.
    • B、The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.
    • C、The radio frequency interference （RFI） is being received as noise.
    • D、A plasma display is emitting infrared noise.

    正确答案:D

  • 第4题：

    A user is reporting that their computer is making strange noises and randomly powers off. Which of the following tools would MOST likely be used to troubleshoot this problem?（）

    • A、POST diagnostic card
    • B、Power supply tester
    • C、Loop back plug
    • D、Cable tester

    正确答案:B

  • 第5题：

    A technician suspects the AC voltage into a PC power supply is bad. Which of the following toolswould MOST likely be used to confirm the diagnosis?（）

    • A、Multimeter
    • B、Oscilloscope
    • C、Cable tester
    • D、Power supply tester

    正确答案:A

  • 第6题：

    The user turns on the computer and hears a popping sound and detects a burning smell. Thesystem will not power on. Which of the following is the MOST likely problem?（）

    • A、Power supply has blown.
    • B、CPU fan is faulty.
    • C、Motherboard has overheated and shutdown.
    • D、UPS has been tripped.

    正确答案:A

  • 第7题：

    Which of the following factors is the MOST likely cause of a power supply fan failure？（）

    • A、 Extreme temperature variances
    • B、 Extreme humidity variances
    • C、 Power stability fluctuations
    • D、 Excessive dust accumulation

    正确答案:D

  • 第8题：

    单选题
    Which of the following factors is the MOST likely cause of a power supply fan failure？（）
    A

     Extreme temperature variances

    B

     Extreme humidity variances

    C

     Power stability fluctuations

    D

     Excessive dust accumulation


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）
    A

    The power supply is faulty and should be replaced.

    B

    The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.

    C

    The radio frequency interference （RFI） is being received as noise.

    D

    A plasma display is emitting infrared noise.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    After the LED display is flashing 888 and the system is rebooted, which of the following commands should be used to gather dump information?（）
    A

    snap 

    B

    errpt 

    C

    kdb 

    D

    trace


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）
    A

    A room thermostat activates an electric heater at each individual chilled air outlet when necessary

    B

    Varying the number of passes the air makes across the coils

    C

    Varying the temperature of the water through the coils

    D

    Varying the quantity of water flowing through the coils


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional？（）
    A

    Dust

    B

    Power Surge

    C

    Excessive humidity

    D

    High temperatures


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be impracticable to maintain ambient conditions within the comfort zone by air conditioning or any other means. The normal practice is to provide copious mechanical ventilation; in boiler rooms, the quantity is equated to the combustion requirements, while in a motor ship engine room the supply may be 25-50% in excess of the requirements of the engines.

    The axial flow fan is particularly suited to handle these large air volumes at the moderate pressures required, while of course the “straight-through” flow feature places it at an advantage over the centrifugal fan.

    The increasing adoption of automation, with the provision of a separate control room makes less significant the fact that comfort conditions cannot be maintained in the engine room all the time. Which of the following devices should be taken to maintain ambient conditions of the boiler and machinery space?

    A.air compressor

    B.air cooler

    C.air-conditioning plant

    D.mechanical ventilation plant


    正确答案：D

  • 第14题：

    Which of the following will help dissipate heat through the heat sink when upgrading a CPU? （）

    • A、Case fan
    • B、Thermal compound
    • C、Motherboard riser
    • D、Power supply

    正确答案:B

  • 第15题：

    Which of the following tools is BEST used to measure voltage and amperage from a power source?（）

    • A、Loopback Plug
    • B、Multimeter
    • C、Power Supply Tester
    • D、Extension Magnet

    正确答案:B

  • 第16题：

    Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional？（）

    • A、Dust
    • B、Power Surge
    • C、Excessive humidity
    • D、High temperatures

    正确答案:A

  • 第17题：

    A user reports it takes a long time to load all applications and the hard drive LED is showing constant activity. Which of the following is MOST likely the issue?（）

    • A、The processor is faulty.
    • B、The file system is fragmented.
    • C、The modem drivers are corrupt.
    • D、The power supply is faulty.

    正确答案:B

  • 第18题：

    A technician has had several support requests for one PC. The technician has reseated the PCIcards and replaced the hard drive in the PC located in a school cafeteria kitchen. PCs located in the business office or the classrooms have not had this issue. Which of the following is MOST likely causing this PC’s issue?（）

    • A、Faulty RAM
    • B、240 volt Kitchen outlets
    • C、Power Brownouts
    • D、Excessive Heat

    正确答案:D

  • 第19题：

    Which of the following should a technician MOST likely use to test a RS-232 port?（）

    • A、Loopback adapter
    • B、Power supply tester
    • C、The ping command
    • D、Multimeter

    正确答案:A

  • 第20题：

    单选题
    Office A is located 500 miles (805 kilometers) away from Office B, yet they are on the same private network. Which of the following is MOST likely being used to accomplish this scenario?（）
    A

    Trunking

    B

    LAN

    C

    VPN

    D

    Peer to peer


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    A user reports it takes a long time to load all applications and the hard drive LED is showing constant activity. Which of the following is MOST likely the issue?（）
    A

    The processor is faulty.

    B

    The file system is fragmented.

    C

    The modem drivers are corrupt.

    D

    The power supply is faulty.


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    The user turns on the computer and hears a popping sound and detects a burning smell. Thesystem will not power on. Which of the following is the MOST likely problem?（）
    A

    Power supply has blown.

    B

    CPU fan is faulty.

    C

    Motherboard has overheated and shutdown.

    D

    UPS has been tripped.


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    A power loss during a firmware update would MOST likely result in which of the following?（）
    A

    Increased heat output

    B

    Damage of the hardware

    C

    Loss of storage data

    D

    Decreased performance


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    A technician suspects the AC voltage into a PC power supply is bad. Which of the following toolswould MOST likely be used to confirm the diagnosis?（）
    A

    Multimeter

    B

    Oscilloscope

    C

    Cable tester

    D

    Power supply tester


    正确答案： A
    解析： 暂无解析

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