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NEW QUESTION 11
A typical data center load would consist of _____ (Choose 3)
- A. Power generator
- B. Software
- C. Computers
- D. Networking equipment
- E. Cooling equipment
Answer: A,C,E
NEW QUESTION 12
Which one of the following measures the real power drawn by the load equipment?
- A. Volts
- B. Watts
- C. Amperes
- 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 13
If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?
- A. 10 kHz
- B. 100 Hz
- C. 100 kHz
- D. 1000 Hz
Answer: C
Explanation:
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.
NEW QUESTION 14
Which one of the following is an advantage of Air Cooled Self-Contained System?
- A. It doesn't requires ductwork and/or dropped ceiling
- B. Lowest installation cost
- C. All components contain more than one unit
- D. It has more heat removal capacity per unit
Answer: A
Explanation:
Explanation
Air cooled self-contained systems are highly efficient and do not require ductwork and/or dropped ceiling for installation. This makes them a great choice for locations where installation costs are a major factor, such as in residential applications, or in places with limited space. Additionally, air cooled self-contained systems have more heat removal capacity per unit compared to water cooled systems, making them more cost-effective in the long run.
NEW QUESTION 15
Which one of the following controls the voltage produced at the output of the alternator?
- A. Voltage Regulator
- B. Voltage Backup Device
- C. Voltage Stabilizer
- D. Voltage Meter
Answer: A
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 16
A __________ generator system is a combination of an electrical generator and a mechanical engine mounted together to form a single piece of equipment.
- A. active
- B. passive
- C. software
- D. standby
Answer: D
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 17
Which one of the following uses sensors such as laser beams or touch sensor?
- A. Backup device
- B. Alarms
- C. CCTV
- D. Server
Answer: B
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 18
Which type of Circuit Breaker uses an electromagnetic coil to pull a switch when a circuit carries too much current?
- A. Thermal
- B. Magnetic
- C. Pull
- D. Static
Answer: B
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 19
For which one of these processes is Direct Current essential, and will not work with alternating current?
- A. Turning a motor
- B. Electrolysis
- C. Lighting
- D. Heating
Answer: B
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 20
______________ security means keeping unauthorized or ill-intentioned people out of places that they do not belong.
- A. Topological
- B. Logical
- C. Network
- D. Physical
Answer: D
Explanation:
Explanation
Physical security means keeping unauthorized or ill-intentioned people out of places that they do not belong.
This can involve a variety of measures, such as locks, alarms, access control systems, cameras, and guards.
Physical security is an important part of any security system, as it helps to protect valuable assets and personnel from theft, vandalism, and other malicious activities.
NEW QUESTION 21
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 22
Which one of the following is a Physical Security Identification Method?
- A. Batch ID
- B. Expression
- C. Voice
- D. Sound
Answer: C
Explanation:
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.
NEW QUESTION 23
Whenever electrical power is being consumed in an IT room or data center. __________ is generated.
- A. Humidity
- B. Static electricity
- C. Condensation
- D. Heat
Answer: D
Explanation:
Explanation
Whenever electrical power is being consumed in an IT room or data center, heat is generated. This heat must be removed in order to maintain an optimal temperature for the equipment, and this is usually done through cooling systems such as air conditioning, air economization, liquid cooling, evaporative cooling, and immersion cooling.
NEW QUESTION 24
AC is more easily distributed than DC. This is because:
- A. DC needs wires to be totally insulated, while AC wires can be bare, hung from insulator on pylons.
- B. Wires have less resistance if they are carrying AC
- C. AC can be transformed from a low voltage to a high voltage and back again with a transformer. DC cannot.
- D. AC can be transmitted using lighter wires.
Answer: C
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 25
Which type of outlet is used for non-computing devices?
- A. Grounding
- B. Harmonic
- C. Static
- D. Convenience
Answer: D
Explanation:
Explanation
Convenience outlets, also known as duplex receptacles or wall outlets, are used to provide power to non-computing devices, such as lamps, televisions, and other household appliances. They are typically found in residential and commercial buildings and are connected to a circuit breaker or fuse for protection against overloading and electrical fires
NEW QUESTION 26
Data Center Precision Cooling Systems maintain temperature within _____________ degree(s) of their design set point.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 27
What are the two main applications for ac (alternate current)?
- A. power, information
- B. direct, pulsating
- C. electric, magnetic
- D. static, dynamic
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
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