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خذ اختبارات أخرى عبر الإنترنت
السؤال #1
ATS Dual Power Automatic Transfer Switch can achieve the switching of two - way power's fast loading machine.
A. True
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #2
According to the concentration degree of equipment, air conditioning system can be divided into ( ). (Multiple choice)
A. Mixed
B. Semi-centralized
C. decentralized
D. Centralized
عرض الإجابة
اجابة صحيحة: BCD
السؤال #3
At a certain atmospheric pressure and water vapor content, the air is cooled down. When the air reaches saturation, it will continue to cool down. The temperature at the time of condensation is ____________ .
At a certain atmospheric pressure and water vapor content, the air is cooled down. When the air reaches saturation, it will continue to cool down
عرض الإجابة
اجابة صحيحة: A
السؤال #4
In an air conditioning system, which of the following uses water cooling or air cooling to cool the high-temperature and high-pressure gas discharged from the compressor and release the heat to the outside?
A. Evaporator
B. Condensercorrect
C. Compressor
D. Expansion valve
عرض الإجابة
اجابة صحيحة: B
السؤال #5
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.
A. False
B. True
عرض الإجابة
اجابة صحيحة: B
السؤال #6
R410a Refrigerants can produce the greenhouse effect and destroy the ozone layer.
A. True
B. Falsecorrect
عرض الإجابة
اجابة صحيحة: B
السؤال #7
Which of the following is the maximum communication distance of RS485 communication method?
A. 5 m
B. 100 m
C. 15 m
D. 1200 mcorrect
عرض الإجابة
اجابة صحيحة: D
السؤال #8
Regarding the description of the data center cooling system, which of the following is wrong?
A. Among rack-level, row-level and room-level cooling, row-level cooling has the shortest airflow path
B. No other options
عرض الإجابة
اجابة صحيحة: A
السؤال #9
In the access control system interface, the functions that can be realized are ____________ .
A.
عرض الإجابة
اجابة صحيحة: ABCD
السؤال #10
Which of the following devices can be used to store video recordings for a long time?
A. UPS
B. NVRcorrect
C. AC Actuator
D. Switch
عرض الإجابة
اجابة صحيحة: B
السؤال #11
Which of the following belongs to air - cooled line air conditioning?
A. NetCol5000 - C
B. NetCol5000 - A
C. NetCol8000 - C
D. NetCol8000 - A
عرض الإجابة
اجابة صحيحة: B
السؤال #12
MCB circuit breakers can be divided into B, C, D, Z, and K levels according to different tripping characteristics. Which level of tripping characteristics should be used for IT loads?
A. B level
B. C-levelcorrect
C. D level
D. Z level
عرض الإجابة
اجابة صحيحة: B
السؤال #13
What is used to indicate the severity of the corresponding fault in dynamic environment monitoring system?
A. Alarm time
B. Alarm name
C. Alarm level
D. Alarm source
عرض الإجابة
اجابة صحيحة: C
السؤال #14
In the low-voltage power distribution system, N The role of the wire is to return the AC operating current.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #15
The increase of cabinet power density will lead to the emergence of local hot spots in the computer room, and row-level air conditioners can solve local problems. The hot spot is too high.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #16
ATS The dual power supply automatic switch can realize the fast mechanical switching of the two power supplies.
A. True
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #17
Which of the following functions uses electronic tag technology to provide real-time statistics on the location of power distribution, air conditioning, refrigeration and other infrastructure?
A. Operation and maintenance management
B. Asset Managementcorrect
C. Report Management
D. System Management
عرض الإجابة
اجابة صحيحة: B
السؤال #18
The gas fire extinguishing system consists of ()
A. Fire extinguisher storage bottle set, starting device, fire pipe network, sprinklercorrect
B. No other options
عرض الإجابة
اجابة صحيحة: A
السؤال #19
For the unsaturated air, the relationship of size among the dry bulb temperature, wet bulb temperature and dew point temperature is ().
A. Wet bulb temperature> dew point temperature> dry bulb temperature
B. Dry bulb temperature> Dew point temperature> Wet bulb temperature
C. wet bulb temperature> dry bulb temperature> dew point temperature
D. Dry bulb temperature> wet bulb temperature> dew point temperature
عرض الإجابة
اجابة صحيحة: D
السؤال #20
Which of the following descriptions about electrical equipment safety is wrong?
A. The metal casing of electrical equipment must be grounded (zeroed) for protection
B. Electrical equipment should be corrosion-resistant and moisture-proof
C. When a fire occurs in electrical equipment, water can be used to extinguish the fire
D. It is strictly forbidden to use electrical equipment beyond the rated value
عرض الإجابة
اجابة صحيحة: C
السؤال #21
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 A
B. 152 Acorrect
C. 210 A
D. 263 A
عرض الإجابة
اجابة صحيحة: B
السؤال #22
In Main Inverter mode, the UPS will switch from Main Inverter mode to Static Bypass mode when mains input voltage and frequency exceed the allowable range of the UPS.
A. TRUE
B. FALSE
عرض الإجابة
اجابة صحيحة: B
السؤال #23
The access control system can only set the user to open the door, and cannot set when to open the door.
A. True
B. Falsecorrect
عرض الإجابة
اجابة صحيحة: B
السؤال #24
There are generally two types of variable air volume ventilated floors, one is through an adjustable air valve, and the other is a dedicated ventilated floor plus adjustable fans.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #25
Which of the following components can check whether the refrigerant contains moisture?
A. Solenoid valve
B. Sight glasscorrect
C. Filter drier
D. Oil sight glass
عرض الإجابة
اجابة صحيحة: B
السؤال #26
UPS The front-end input can be two mains, one main and one standby, or one mains and one diesel engine input.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #27
Data center energy consumption mainly comes from the ring equipment, lighting system, refrigeration systems, power supply and distribution system. How to reduce the energy dissipations of the ( ) is the key to solve data center energy conservation in the industry at present.
A. IT equipment
B. Refrigeration system
C. Lighting System
D. Power Supply and Distribution System
عرض الإجابة
اجابة صحيحة: B
السؤال #28
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 indoor air passes through the surface of the condenser
D. The condenser of an air-cooled direct expansion air conditioner is generally installed outdoors
عرض الإجابة
اجابة صحيحة: C
السؤال #29
If the capacity of UPS is 20KVA, then in normal operation, the UPS front-end input capacity may be ()
A. 25KVAcorrect
B. 30KVA
C. 28KVA
عرض الإجابة
اجابة صحيحة: A
السؤال #30
Which of the following descriptions about data center monitoring systems is wrong?
A. Can monitor power system, environmental system, fire protection system, etc
B. Remote monitoring is not supportedcorrect
C. Can provide multiple alarm methods such as voice and short message
D. Intelligent monitoring system can improve management efficiency
عرض الإجابة
اجابة صحيحة: B

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