is the degree to which a system or component is operational and accessibility when required for use.
Answer(s): D
Availability is the degree to which a system, product or component is operational and accessible when required for use. It is one of the attributes of reliability, which is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. Availability can be calculated as the ratio of the expected value of the uptime (the time when the system is functional) to the total time (uptime plus downtime) of a system or component. Availability can also be influenced by factors such as maintainability, fault tolerance, redundancy, diagnostics, and logistics.
EPI Data Centre Professional (CDCP®) Preparation Guide, page 8; Availability - Wikipedia; Reliability - ISO 25000.
Which one of the following is a device that uses circulating chilled water to remove heat?
Answer(s): A
A computer room air handling unit (CRAH) is a device that uses circulating chilled water to remove heat from the data center environment. A CRAH consists of a fan, a coil, and a filter. The fan draws the warm air from the data center and passes it through the coil, where the heat is transferred to the chilled water. The chilled water is supplied by a chiller or a cooling tower, and the cooled air is returned to the data center. A CRAH is different from a computer room air conditioning unit (CRAC), which uses a refrigerant instead of chilled water to cool the air.
· EPI Data Centre Professional (CDCP®) Preparation Guide, page 36 · Chilled Water Systems: Applications and Common Uses· The Principles of Basic Refrigeration: What is a chiller?
is the ability of a system or component to perform its required functions under stated conditions for a specified period of time.
Answer(s): C
According to the IEEE definition, reliability is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. Reliability is a measure of how often a system or component fails, and how long it takes to recover from a failure. Reliability is closely related to availability, which is the degree to which a system or component is operational and accessible when required for use. Reliability and availability are both affected by factors such as design, maintenance, testing, and environmental conditions.
EPI Data Centre Training Framework, CDCP Preparation Guide, Reliability engineering - Wikipedia
Which type of Humidifier rapidly vibrates waster to create a fog or mist?
An ultrasonic humidifier is a type of cool mist humidifier that uses a metallic diaphragm that vibrates at high frequencies to create water droplets that are added to the air. A fan projects these droplets into the air as mist, which then evaporates and humidifies the room. This type of humidifier rapidly vibrates the water to create a fog or mist.
EPI Data Centre Training Framework, How Humidifiers Can Help Allergies, Humidifier Buying Guide: Pros and Cons of Different Types.
Post your Comments and Discuss EXIN CDCP exam with other Community members:
Mazin commented on October 18, 2024 Good questions Anonymous upvote
Our website is free, but we have to fight against bots and content theft. We're sorry for the inconvenience caused by these security measures. You can access the rest of the CDCP content, but please register or login to continue.