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The CDCS certification program covers all aspects of data center management, including design, implementation, maintenance, and operation. It also covers topics such as power and cooling, IT service management, virtualization, and cloud computing. Certified Data Centre Specialist (CDCS) certification program is ideal for professionals who are responsible for managing data center operations, including IT managers, system administrators, data center operators, and network engineers. By obtaining the CDCS certification, professionals can demonstrate their expertise and gain recognition for their skills in the data center industry.
NEW QUESTION # 20
___________ measures the amount of electrical current flowing through a circuit during a specific time interval.
- A. Ampere
- B. Ohm
- C. Watts
- D. Volts
Answer: A
Explanation:
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/)
NEW QUESTION # 21
Which mounted system can use any of the five heat removal methodologies?
- A. Floor Mounted System
- B. Ceiling Mounted System
- C. Air Mounted System
- D. Chilled Mounted System
Answer: B
NEW QUESTION # 22
How many approaches are there to remove unwanted heat from an IT environment?
- A. Four
- B. Seven
- C. Five
- D. Six
Answer: C
Explanation:
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.
NEW QUESTION # 23
Data Center Precision Cooling Systems maintain temperature within _____________ degree(s) of their design set point.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 24
A __________ generator system is a combination of an electrical generator and a mechanical engine mounted together to form a single piece of equipment.
- A. passive
- B. standby
- C. software
- D. active
Answer: B
Explanation:
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.
NEW QUESTION # 25
True or False: Human error is a major cause of data center downtime
- A. False
- B. True
Answer: B
Explanation:
Explanation
Human error is a major cause of data center downtime. Human mistakes are one of the top causes of data center outages, accounting for around one-third of all downtime incidents. Common causes of human error in data centers include misconfiguration, inadequate maintenance, and improper security practices. To reduce the risk of human error, it is important to ensure that data center staff receive proper training, have adequate access control measures in place, and are familiar with best practices for data center operations.
NEW QUESTION # 26
Which mounted system is used to cool small IT environments?
- A. Floor Mounted System
- B. Air Mounted System
- C. Ceiling Mounted System
- D. Chilled Mounted System
Answer: B
Explanation:
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.
NEW QUESTION # 27
What are the two main applications for ac (alternate current)?
- A. power, information
- B. static, dynamic
- C. electric, magnetic
- D. direct, pulsating
Answer: A
Explanation:
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.
NEW QUESTION # 28
Which type of power can be a source available to the data center that takes over the function of supplying when utility power is unavailable?
- A. Standby
- B. Passive
- C. Active
- D. Alternate
Answer: A
Explanation:
Explanation
Standby power, also known as backup power, is a type of power that can be a source available to the data center that takes over the function of supplying when utility power is unavailable. Standby power systems are designed to provide power to critical loads in the event of a power outage, and can include generators, uninterruptible power supplies (UPS), and batteries. Standby power systems can be used to provide power to the data center for a short period of time, such as a few hours or days, until utility power is restored.
Passive, Active and Alternate are not specific type of power sources used in data center. They are terms used in different context and have different meaning.
NEW QUESTION # 29
Which one of the following is an advantage of Glycol Cooled System?
- A. No maintenance of glycol
- B. Can be used in big data centers
- C. Glycol pipes can run long distances and can service several CRAC units
- D. No additional cost is required
Answer: C
Explanation:
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.
NEW QUESTION # 30
Which one of the following is an advantage of using Natural Gas?
- A. Tends to cost more
- B. More exhaust able
- C. Maximum carbon build up
- D. Minimum carbon build up
Answer: D
Explanation:
Explanation
The main advantage of using natural gas is that it tends to produce fewer carbon emissions than other fossil fuels, such as coal or oil. Natural gas combustion produces less carbon dioxide and other pollutants than other fuels, making it a cleaner and more renewable source of energy. Additionally, natural gas costs less than other fuels, making it a more cost-effective option.
NEW QUESTION # 31
For which one of these processes is Direct Current essential, and will not work with alternating current?
- A. Electrolysis
- B. Lighting
- C. Heating
- D. Turning a motor
Answer: A
Explanation:
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.
NEW QUESTION # 32
Which one of the following is a Physical Security Device?
- A. Contactless smart card
- B. Token card
- C. Access Key
- D. Fiber optic cable
Answer: A
Explanation:
Explanation
A contactless smart card is a physical security device that uses radio frequency identification (RFID) technology to identify and authenticate an individual. This type of card is used in a variety of applications, such as access control systems and digital payment systems. It is also used in physical access control systems, where the card is used to unlock doors or grant access to restricted areas. Contactless smart cards are also used in building access systems, where the card is used to grant access to certain areas of the building.
NEW QUESTION # 33
Which one of the following describes the amount of resistance electricity encounters?
- A. Ampere
- B. Watts
- C. Ohm
- D. Volts
Answer: C
Explanation:
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.
NEW QUESTION # 34
Which component is designed to protect electrical equipment from damage caused by overload or short circuit?
- A. Stabiliser
- B. Transient
- C. Transfer Switch
- D. Circuit Breaker
Answer: D
Explanation:
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.
NEW QUESTION # 35
Which system in Air Distribution System takes the hot exhaust air from the IT equipment to the CRAC
- A. Regulation system
- B. Maintenance system
- C. Supply system
- D. Return system
Answer: D
Explanation:
Explanation
The return system in an air distribution system takes the hot exhaust air from the IT equipment and returns it to the Computer Room Air Conditioner (CRAC) unit. The CRAC unit cools the hot exhaust air and recirculates it back into the data center. The return system typically includes ducts, grills, and other components that allow the hot air to be efficiently and effectively returned to the CRAC unit.
Supply system is responsible for bringing in the cooled and filtered air from the CRAC unit to the data center.
Maintenance system and regulation system are not related to air distribution system in the data center.
NEW QUESTION # 36
What are the two main applications for ac (alternate current)?
- A. power, information
- B. static, dynamic
- C. electric, magnetic
- D. direct, pulsating
Answer: A
Explanation:
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.
NEW QUESTION # 37
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