EMT Practice Test

1. Question Content...

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Question1: Dynamic ring monitoring system can be applied to ____________ .

Question2: The following components that can improve the heat exchange capacity of the heat exchanger are
____________ .

Question3: The access control system can only set the user to open the door, and cannot set when to open the door.

Question4: The surface cooler controls the indoor temperature and humidity through the heat exchange between the refrigerant and the indoor air.

Question5: Use RS485 Communication method, the maximum communication distance is ____________ Meter.

Question6: The following ____________ Is the correct statement 6Two fixed valve-regulated sealed lead-acid battery cells are connected in series, and the rated capacity is 150AH.

Question7: CLF Defined as the power consumption of data center cooling equipment and IT The ratio of the power consumption of the device.

Question8: Data center energy consumption mainly comes from environmental equipment, lighting systems, refrigeration systems, power distribution systems, etc. How to reduce the energy consumed by ____________ is the key to solving data center energy conservation in the industry.

Question9: () is a fire detector that detects smoke particles.

Question10: The valve-controlled sealed lead-acid battery safety valve has ____________ Function.

Question11: The user can upgrade the device version in the ____________ interface.

Question12: The following ____________ is not the basic function of low-voltage circuit breakers.

Question13: The leakage protector is mainly divided into electronic type and electromagnetic type according to the action mode.

Question14: The core components of the refrigeration system mainly include ____________ .

Question15: PLE Defined as the power consumption of the data center power supply and distribution system and IT The ratio of the power consumption of the device.

Question16: ____________ Yes upsThe unit of rated capacity.

Question17: Through the query ____________, the user can understand the operation of the device.

Question18: ____________ The main function is electric energy distribution, which distributes the front-end electric energy to various types of electrical equipment according to requirements, standards and specifications, such as ups, Air conditioning, lighting system, etc.

Question19: ABC Circuit breakers are mainly used IT Load front end, such as ups Inside the output cabinet.

Question20: RER It is used to measure the use of renewable energy in the data center to promote the regeneration of solar, wind, and water energy, and the use of energy with no carbon emissions or very little carbon emissions.

Question21: PUE The closer the value ____________, indicating that the energy efficiency status of the data center is good.

Question22: The following () options belong to water-cooled chilled water air conditioners. (Multiple choice)

Question23: ATS The dual power supply automatic switch can realize the fast mechanical switching of the two power supplies.

Question24: Reflects the dryness of the air, the smaller the value, the drier the air.

Question25: The dynamic environment monitoring system focuses on data center infrastructure management, and supports the monitoring of power supply equipment, cooling equipment, environmental equipment and security equipment in the data center.

Question26: The parameters that can reflect the energy efficiency and energy use efficiency of the data center are
____________ .

Question27: ____________ is used to ensure that the fire extinguishing agent has been sprayed out in a specific jet form to promote the rapid gasification of the fire extinguishing agent and reach the fire extinguishing concentration in the protected space.

Question28: The data center computer room monitoring system mainly monitors power systems, environmental systems, and fire fighting systems.

Question29: During the construction process, the nitrogen bottle operation must be equipped with special ____________ .

Question30: The basic principle of the rotary dehumidifier is that the water vapor encounters the condensation water droplets of the cooling tube fins to dehumidify.

Question31: In the air-conditioning system, the function of the ____________ is to use water cooling or air cooling to cool the high-temperature and high-pressure gas discharged from the compressor and release heat to the outside world.

Question32: MCB Circuit breaker CThe setting value of level tripping is in ____________, used in ITLoad occasions.

Question33: Huawei monitoring system ECC800 The collector can be inserted at most ____________ A power supply module.

Question34: The three major indicators of air conditioning are ____________ .

Question35: Sensible heat ratio=Sensible heat/Full heat/Sensible heat/(Sensible heat+Latent heat).

Question36: In the main inverter mode, when the mains input voltage and frequency exceed ups When the allowable range isups Will be inverted from the main circuit. The mode shifts to static bypass mode.

Question37: The following air conditioners are comfortable air conditioners ____________ .

Question38: The following are not part of the agreement ____________ .

Question39: ____________ Not part of Huawei's monitoring system NETECO Provide monitoring functions.

Question40: Use POE When interface, it has two functions of communication and power supply.

Question41: same MCB Rated ultimate short-circuit breaking capacity of circuit breaker LCU Generally less than the rated operating short-circuit breaking capacity LCS.

Question42: MCB Circuit breakers can be divided into ____________ and (magnetic trip) according to the principle of tripping.

Question43: The use of water fire and foam fire extinguishing systems in the data center will not cause damage to communication equipment.

Question44: Exist UPS in the system, the most comprehensive description of the role of the inverter circuit is
____________ .

Question45: The fuse can protect personal safety when the equipment leaks.

Question46: It can be implemented in the alarm management function of the dynamic environment monitoring system
____________ .

Question47: The following ____________ is correct 1A fixed valve-regulated sealed lead-acid battery 2VMonomer, the rated capacity is 800Ah.

Question48: There are three different classifications of grounding forms in low-voltage power distribution systems
____________, where the first capital letter represents ____________ .

Question49: The dynamic environment monitoring system only has a secondary structure.

Question50: Which of the following descriptions about the air supply method from top to bottom is correct ____________ .

Question51: Environmentally friendly refrigerant R410A Refrigeration performance is better than non-refrigerant R22 better.

Question52: The following ____________ Yes UPS 2N. The advantages of the system.

Question53: The air-conditioning energy efficiency ratio is the ratio of the effective input power to the cooling capacity, and its value is W/W Express.

Question54: Compared with comfort air conditioners, special air conditioners for computer rooms have the following advantages ____________ .

Question55: Huawei Monitoring System Neteco Can only access support SNMP Protocol equipment.

Question56: In the low-voltage power distribution system,PE The function of the line is to provide a path for the fault current when the power supply system fails.

Question57: The condensate of the air conditioner is formed by condensation after the air warning surface cooler cools down.

Question58: UPS systematic N+X System ratio 2N The power supply guarantee level of the system is higher.

Question59: pPUE is a data center PUE An extension of the concept, used to evaluate the energy efficiency of a local area of a data center or equipment And analysis.

Question60: The following air conditioning, which is comfort air conditioning?

Question61: Data centers usually use gas fire protection systems.

Question62: The user can use the ____________ function to assign personnel to handle the fault.

Question63: Common device communication methods are RS232,RS485,FE Wait.

Question64: Low-temperature components can improve the continuous low pressure caused by low-temperature start, so that the air conditioner can start normally.

Question65: During the implementation process, corrosive operations should be used ____________ .

Question66: The main fire extinguishing agent used in the data center fire protection system is ____________ .

Question67: Regarding the description of the data center cooling system, the following ____________ is wrong.

Question68: The role of the lead-acid battery battery is to contain electrolyte, plates, separators, etc.

Question69: The possible functions of the dynamic loop monitoring system include ____________ .

Question70: MCB Circuit breakers can be divided into different tripping characteristics B, C, D, Z, K Level, for IT For load, you should use ____________ class Tripping characteristics.

Question71: Water cooling/The refrigerant of ethylene glycol air conditioner has been flushed before leaving the factory, so it is convenient and quick to install on site.