GAQM: Date Centre CDCS-001リアル試験問題と無料最新回答2023年07月25日
CDCS-001究極な学習ガイド
GAQM CDCS-001試験は、データセンター管理のスキルと知識を開発したい個人を対象とした認定試験です。この分野で専門家として自己を確立し、データセンターの管理における熟練度を証明したい人を対象としています。
質問 # 23
___________ measures the amount of electrical current flowing through a circuit during a specific time interval.
- A. Watts
- B. Ampere
- C. Volts
- D. Ohm
正解：B
解説：
Explanation
An ampere (A) is the unit of measurement for electric current. It measures the amount of electrical current flowing through a circuit during a specific time interval. The ampere is named after Andre-Marie Ampere, a French mathematician and physicist who was one of the main discoverers of electromagnetism.
Ohm () is the unit of measurement for electric resistance, which is the opposition to the flow of an electric current through a circuit.
Volt (V) is the unit of measurement for electric potential difference, which is the energy required per unit charge to move a test charge between two places in a static electric field.
Watt (W) is the unit of measurement for power, which is the rate at which energy is used or generated in an electrical circuit.
References:
* "Current" (https://www.britannica.com/topic/current-electricity)
* "Electric current" (https://www.sciencedirect.com/topics/engineering/electric-current)
* "Units of Measurement"
(https://www.allaboutcircuits.com/textbook/direct-current/chpt-1/units-of-measurement/)
質問 # 24
____________ is a systematic variation of the voltage wave form or a series of random voltage changes of small dimensions.
- A. Voltage truncation
- B. Voltage fluctuation
- C. Frequency variation
- D. Standby variation
正解：B
解説：
Explanation
Voltage fluctuation is a systematic variation of the voltage waveform or a series of random voltage changes of small dimensions that occur over a period of time. Voltage fluctuation can be caused by a variety of factors, such as changes in demand, changes in the power system, faults on the power system, or the switching of large loads.
質問 # 25
Which one of the following describes the amount of resistance electricity encounters?
- A. Ohm
- B. Watts
- C. Ampere
- D. Volts
正解：A
解説：
Explanation
Ohm () describes the amount of resistance electricity encounters. It is one of the base units of the International System of Units (SI), and is defined as the amount of resistance that a conductor has when a force of one volt is applied across it. Ohms are used to measure the electrical resistance of a circuit, and can be used to determine the power of a circuit or the amount of current flowing through it.
質問 # 26
For which one of these processes is Direct Current essential, and will not work with alternating current?
- A. Heating
- B. Lighting
- C. Turning a motor
- D. Electrolysis
正解：D
解説：
Explanation
Direct Current (DC) is essential for the process of electrolysis. Electrolysis is the process of breaking down a compound using an electric current. The electric current causes ions to move, which results in a chemical reaction that breaks down the compound. In order for electrolysis to work, a direct current is required, as the ions must flow in one direction. Alternating Current (AC) changes direction and would not provide a consistent flow of ions.
Heating, lighting, and turning a motor can be done by either DC or AC. Heating can be done by passing an electric current through a heating element, which can be powered by either DC or AC. Lighting can be done by passing an electric current through a light bulb, which can be powered by either DC or AC. A motor can be powered by either DC or AC, but the type of motor and the application will determine which type of current is more suitable.
質問 # 27
Which one of the following is a Physical Security Identification Method?
- A. Expression
- B. Sound
- C. Batch ID
- D. Voice
正解：D
解説：
Explanation
Voice identification is a physical security identification method that uses the sound of an individual's voice to identify them. This method is often used in combination with other identification methods, such as biometric scans, to provide a more secure form of authentication. Voice identification is used in a variety of situations, such as when accessing a secure facility or when making financial transactions.
質問 # 28
A __________ generator system is a combination of an electrical generator and a mechanical engine mounted together to form a single piece of equipment.
- A. standby
- B. software
- C. passive
- D. active
正解：A
解説：
Explanation
A Standby Generator System is a combination of an electrical generator and a mechanical engine mounted together to form a single piece of equipment. The generator provides power to essential appliances and equipment in the event of a power outage. Standby Generator Systems are usually powered by gasoline, diesel, natural gas, or propane, and they are designed to be able to be activated quickly in the event of an emergency.
質問 # 29
Which one of the following describes the amount of resistance electricity encounters?
- A. Ohm
- B. Watts
- C. Ampere
- D. Volts
正解：A
解説：
Explanation
Ohm () describes the amount of resistance electricity encounters. It is one of the base units of the International System of Units (SI), and is defined as the amount of resistance that a conductor has when a force of one volt is applied across it. Ohms are used to measure the electrical resistance of a circuit, and can be used to determine the power of a circuit or the amount of current flowing through it.
質問 # 30
Every air distribution system has a ____________ system and a _________ system
- A. Supply, Reverse
- B. Supply, Release
- C. Supply, Return
- D. Maintenance, Regulation
正解：C
解説：
Explanation
Every air distribution system has a supply system, which delivers conditioned air to the space, and a return system, which collects the air from the space and returns it to the air handling unit. The return system is responsible for providing the necessary negative pressure in the space to ensure proper air circulation.
質問 # 31
If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?
- A. 10 kHz
- B. 1000 Hz
- C. 100 kHz
- D. 100 Hz
正解：C
解説：
Explanation
Frequency is the inverse of period, so to calculate the frequency of a signal with a period of 10 microseconds, you would divide 1 by the period, which is equal to 100 kHz.
質問 # 32
True or False: A grounded wire is connected to metal appliance cases
- A. False
- B. True
正解：B
解説：
Explanation
A grounded wire is connected to metal appliance cases in order to provide a safe path for electricity to flow in the event of a short circuit or other electrical problem. This helps to protect the appliance and the people using it from potential electrical shocks, and it also helps prevent fires and other accidents.
質問 # 33
Which one of the following is a disadvantage of Water Cooled System?
- A. Introduces an additional source of liquid
- B. Condenser water piping loops long distances
- C. Usage of the building's condenser water is less expensive than chilled water
- D. All components are located inside the CRAC
正解：A
解説：
Explanation
Water cooled systems introduce an additional source of liquid, which can be a potential source of contamination and damage to the IT equipment. Additionally, water cooled systems require more maintenance than air cooled systems and are more expensive to install due to the additional cost of the cooling tower, piping, and pumps.
質問 # 34
What are the two main applications for ac (alternate current)?
- A. electric, magnetic
- B. power, information
- C. direct, pulsating
- D. static, dynamic
正解：B
解説：
Explanation
The two main applications for AC (alternate current) are power and information. AC is used to generate and transfer power to electrical devices, and is also used to carry information signals in telecommunications.
質問 # 35
Which one of the following is an advantage of Glycol Cooled System?
- A. No additional cost is required
- B. Can be used in big data centers
- C. Glycol pipes can run long distances and can service several CRAC units
- D. No maintenance of glycol
正解：C
解説：
Explanation
Glycol cooled systems are advantageous because they are efficient and can service large data centers with multiple racks. Furthermore, glycol pipes can run long distances, allowing a single system to service several CRAC units. This eliminates the need for multiple systems, resulting in cost savings and reduced maintenance.
質問 # 36
Which mounted system is used to cool small IT environments?
- A. Air Mounted System
- B. Ceiling Mounted System
- C. Floor Mounted System
- D. Chilled Mounted System
正解：A
解説：
Explanation
An air mounted system is often used to cool small IT environments. This type of cooling system is typically mounted on the wall or ceiling and works by blowing cool air into the room to lower the temperature. Air mounted systems are compact, easy to install and maintain, and can be a cost-effective solution for small spaces.
質問 # 37
Which component is designed to protect electrical equipment from damage caused by overload or short circuit?
- A. Transfer Switch
- B. Stabiliser
- C. Circuit Breaker
- D. Transient
正解：C
解説：
Explanation
A circuit breaker is a device designed to protect electrical equipment from damage caused by overload or short circuit. Circuit breakers are designed to detect when too much current is flowing through a circuit and to shut the circuit off when that happens. This protects the equipment from damage due to overloading or short circuiting, and it also helps prevent fires and other accidents.
質問 # 38
How many approaches are there to remove unwanted heat from an IT environment?
- A. Four
- B. Five
- C. Seven
- D. Six
正解：B
解説：
Explanation
There are five common approaches to removing unwanted heat from an IT environment:
* Air conditioning: using mechanical cooling to remove heat from the air.
* Air economization: using outside air to cool the IT environment when the temperature is cooler than the desired temperature inside the data center.
* Liquid cooling: using a liquid coolant to absorb and remove heat from IT equipment.
* Evaporative cooling: using water evaporation to cool the air.
* Immersion cooling: submerging IT equipment in a liquid coolant to remove heat.
質問 # 39
Which one of the following Volt Configurations support commercial environments and data centers?
- A. 3-phase 280V
- B. Single phase 120V and 240V
- C. Single phase 120V
- D. Single phase 240V
正解：A
質問 # 40
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