Practice GAQM: Date Centre CDCS-001 exam. Online Exam Practice Tests with detailed explanations! Pass CDCS-001 with confidence!
CDCS-001 - Certified Data Centre Specialist (CDCS) Practice Tests 2023 | PrepAwayExam
NEW QUESTION # 15
Which one of the following uses sensors such as laser beams or touch sensor?
- A. CCTV
- B. Server
- C. Alarms
- D. Backup device
Answer: C
Explanation:
Explanation
Alarms are physical security devices that use sensors such as laser beams or touch sensors to detect movement or intrusion. These devices are used to alert the user of any unauthorized activity in the area. Alarms can also be used in combination with CCTV cameras to provide a comprehensive security system.
NEW QUESTION # 16
True or False: A grounded wire is connected to metal appliance cases
- A. False
- B. True
Answer: B
Explanation:
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.
NEW QUESTION # 17
Which one of the following measures the real power drawn by the load equipment?
- A. Amperes
- B. Watts
- C. Volts
- D. Amps
Answer: B
Explanation:
Explanation
Watts measures the real power drawn by the load equipment and is determined by multiplying the volts and amps of the load
NEW QUESTION # 18
Which component is designed to protect electrical equipment from damage caused by overload or short circuit?
- A. Circuit Breaker
- B. Transient
- C. Stabiliser
- D. Transfer Switch
Answer: A
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 # 19
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
Answer: A
Explanation:
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.
NEW QUESTION # 20
Which one of the following is a Physical Security Device?
- A. Fiber optic cable
- B. Token card
- C. Contactless smart card
- D. Access Key
Answer: C
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 # 21
Which one of the following Volt Configurations support commercial environments and data centers?
- A. Single phase 120V and 240V
- B. 3-phase 280V
- C. Single phase 240V
- D. Single phase 120V
Answer: B
NEW QUESTION # 22
Which type of Circuit Breaker uses an electromagnetic coil to pull a switch when a circuit carries too much current?
- A. Thermal
- B. Pull
- C. Static
- D. Magnetic
Answer: D
Explanation:
Explanation
Magnetic circuit breakers use an electromagnetic coil to pull a switch when a circuit carries too much current, thus tripping the circuit and preventing it from exceeding its rated amperage.
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: B
NEW QUESTION # 24
____________ is a systematic variation of the voltage wave form or a series of random voltage changes of small dimensions.
- A. Frequency variation
- B. Standby variation
- C. Voltage fluctuation
- D. Voltage truncation
Answer: C
Explanation:
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.
NEW QUESTION # 25
For which one of these processes is Direct Current essential, and will not work with alternating current?
- A. Electrolysis
- B. Heating
- C. Lighting
- 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 # 26
__________ represents the maximum power cable of being drawn by the equipment.
- A. Power rating
- B. Star rating
- C. Grade rating
- D. VA rating
Answer: A
Explanation:
Explanation
Power rating represents the maximum power that can be drawn by the equipment. It is usually measured in watts (W) or kilowatts (kW) and represents the maximum amount of power that the equipment can consume without causing damage to the device or the power source.
VA rating (Volt-Ampere rating) is a measure of the apparent power in a circuit, which is the product of the voltage and current in the circuit. It is often used to describe the power handling capability of electronic devices and equipment.
Star rating is a rating system used to indicate the energy efficiency of electrical devices and equipment. The rating ranges from 1 to 5 stars, with 5 stars indicating the most energy-efficient device.
Grade rating is a rating system used to indicate the quality of electrical devices and equipment. It is used in different industry and can indicate the quality of electronic component and material used in equipment.
NEW QUESTION # 27
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 # 28
Which mounted system is used to cool small IT environments?
- A. Air Mounted System
- B. Floor Mounted System
- C. Chilled Mounted System
- D. Ceiling Mounted System
Answer: A
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 # 29
Which one of the following controls the voltage produced at the output of the alternator?
- A. Voltage Stabilizer
- B. Voltage Regulator
- C. Voltage Backup Device
- D. Voltage Meter
Answer: B
Explanation:
Explanation
A voltage regulator controls the voltage produced at the output of the alternator. It's a device that maintains the output voltage of an alternating current (AC) power source within a safe range. The voltage regulator compares the actual output voltage to the desired voltage level and adjusts the voltage accordingly.
Voltage Meter, Voltage Stabilizer, and Voltage Backup Device are not devices that control the voltage produced at the output of the alternator. They are different types of equipment and have different functions.
A voltage meter is a device used to measure the voltage in an electrical circuit. A voltage stabilizer is an electronic device that maintains a constant voltage level. A voltage backup device is a device that provides temporary backup power in case of an electrical outage.
NEW QUESTION # 30
What is a Data Center?
- A. A building or a portion of a building whose primary function is to house a computer room and its related support areas
- B. A room in a building dedicated to monitoring data and information.
- C. A building or a portion of a building where debugging takes place
- D. A building or portion of a building whose primary function is to research new data.
Answer: A
Explanation:
Explanation
A building or a portion of a building whose primary function is to house a computer room and its related support areas. A Data Center is a secure, temperature-controlled environment that houses computer systems, equipment, and associated components. It is typically used to store, process, and distribute large amounts of data and information. Data Centers typically include server racks, storage arrays, network switches, firewalls, and other components necessary for the operation of computer systems.
NEW QUESTION # 31
AC is more easily distributed than DC. This is because:
- A. AC can be transformed from a low voltage to a high voltage and back again with a transformer. DC cannot.
- B. AC can be transmitted using lighter wires.
- C. DC needs wires to be totally insulated, while AC wires can be bare, hung from insulator on pylons.
- D. Wires have less resistance if they are carrying AC
Answer: A
Explanation:
Explanation
AC can be transformed from a low voltage to a high voltage and back again with a transformer, while DC cannot. This makes it easier to distribute AC electricity over long distances and is why it is used more widely than DC electricity. A and B are also true, as wires carrying AC can be bare and don't need to be totally insulated. Wires have less resistance when carrying AC electricity, which is why it is more efficient than DC.
NEW QUESTION # 32
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