The power supply is faulty and should be replaced.
The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.
The radio frequency interference （RFI） is being received as noise.
A plasma display is emitting infrared noise.
第1题：
A. The processor is faulty.
B. The file system is fragmented.
C. The modem drivers are corrupt.
D. The power supply is faulty.
第2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
第3题：
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 point
B.Heating the air to a point at which moisture will boil off ,then re-cooling it
C.Cooling the air to a point below dew point, then reheating it
D.Heating the air and then cooling it to a point below dew point
第4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？（）
第5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?（）
第6题：
A. Multimeter
B. Oscilloscope
C. Cable tester
D. Power supply tester
第7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
第8题：
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 valve
B.Eroded zinc pencils in the heat exchanger
C.Steam formation in the expansion tank
D.Excessive leakage from jacket water pump seals
第9题：
Which of the following will help dissipate heat through the heat sink when upgrading a CPU? （）
第10题：
Which of the following tools is BEST used to measure voltage and amperage from a power source?（）