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Which of the following components does not belong to the smoke exhaust system in the fire protection system?
Which of the following components does not belong to the smoke exhaust system in the fire protection system?A . Pressurized blowerB . Smoke ExhaustC . Air ductD . Air sampling tubeView AnswerAnswer: D
Which of the following descriptions about electrical equipment safety is wrong?
Which of the following descriptions about electrical equipment safety is wrong?A . The metal casing of electrical equipment must be grounded (zeroed) for protectionB . Electrical equipment should be corrosion-resistant and moisture-proofC . When a fire occurs in electrical equipment, water can be used to extinguish the fire.D . It...
Which of the following statements about condensers is wrong?
Which of the following statements about condensers is wrong?A . Under normal circumstances, the inlet temperature of the condenser in an air-cooled direct expansion air conditioner is higher than the outdoor temperature.B . Condensers can be divided into air-cooled condensers and water-cooled condensers.C . Condensation water will be generated when...
The active power is 80 kW, the power factor is 0.8, the system rated voltage is 380 V, 50 Hz, what is the current when the equipment is running at full power?
The active power is 80 kW, the power factor is 0.8, the system rated voltage is 380 V, 50 Hz, what is the current when the equipment is running at full power?A . 122 AB . 152 AC . 210 AD . 263 AView AnswerAnswer: B
In a circuit with resistance and capacitance, if the frequency of the current increases from 50 Hz to 100 Hz, how will the impedance of the circuit change?
In a circuit with resistance and capacitance, if the frequency of the current increases from 50 Hz to 100 Hz, how will the impedance of the circuit change?A . IncreaseB . ReduceC . No changeD . UncertainView AnswerAnswer: B
Which of the following is correct about the upward supply and downward return air supply method?
Which of the following is correct about the upward supply and downward return air supply method?A . The air supply outlet is located at the upper part of the air-conditioned room, and the air return outlet is located at the lower part of the air-conditioned room.B . NoneView AnswerAnswer: A
Which of the following interfaces can both power the device and have communication functions?
Which of the following interfaces can both power the device and have communication functions?A . RJ45B . RJ12C . FED . POEView AnswerAnswer: D
Which of the following components is a fire detector that detects smoke particles?
Which of the following components is a fire detector that detects smoke particles?A . Heat DetectorB . Pressure switchC . Smoke detectorD . Sound and light alarmView AnswerAnswer: C
Which of the following components can check whether the refrigerant contains moisture?
Which of the following components can check whether the refrigerant contains moisture?A . Solenoid valveB . Sight glassC . Filter drierD . Oil sight glassView AnswerAnswer: B
Which of the following does not belong to the integrated wiring system?
Which of the following does not belong to the integrated wiring system?A . Raised FloorB . Fiber OpticC . Cable TrayD . Patch PanelView AnswerAnswer: A
