Heatsink
Fan
Liquid cooling
Compressed air
单选题Gas exchange, which is a basic part of the cycle of an internal combustion engine, is（）A the supply of normal air and removal of compressed airB the supply of fuel oil and combustion of the atomized oilC the supply of fresh air and removal of exhaust gasesD the supply of fresh air and removal of the extra heat
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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 necessaryB Varying the number of passes the air makes across the coilsC Varying the temperature of the water through the coilsD Varying the quantity of water flowing through the coils
单选题Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）A A shortage of liquid refrigerantB Excessive frost on the evaporatorC Excessive condenser cooling waterD Insufficient condenser cooling water flow
单选题Which of the following terms would best describe the temperature at which a liquid boils at a given pressure?（）A Degree of saturationB Saturation temperatureC Superheated temperatureD Degree of superheat
单选题Which of the following is the MOST critical component related to removing heat from the CPU?（）A Vented caseB Number of fansC Thermal pasteD Liquid cooling
单选题Which of the following would BEST provide cooling to a processor?（）A Case fanB HeatsinkC Liquid cooling systemD CPU fan
单选题Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）A Holding the valve open for a long periodB Increasing the starting air pressure usedC Opening the stating air valve quicklyD Reducing the starting air valve size
