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NEW QUESTION # 32
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. Active
- B. Alternate
- C. Passive
- D. Standby
Answer: D
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 # 33
______________ security means keeping unauthorized or ill-intentioned people out of places that they do not belong.
- A. Physical
- B. Logical
- C. Network
- D. Topological
Answer: A
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 # 34
True or False: The availability of fuel typically determines the type of standby generator chosen.
- A. True
- B. False
Answer: A
NEW QUESTION # 35
__________ represents the maximum power cable of being drawn by the equipment.
- A. Grade rating
- B. Power rating
- C. Star rating
- D. VA rating
Answer: B
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 # 36
Which power distribution component is often used when many electrical devices are enclosed proximity especially with audio, video and computers?
- A. Power distribution units (PDU)
- B. Outlet strips
- C. Backup server
- D. Server plug
Answer: A
Explanation:
Explanation
The best option for enclosing many electrical devices in proximity, especially with audio, video and computers, is Power Distribution Units (PDUs). PDUs are designed to provide power to multiple devices using a single power source, such as a wall outlet or a generator, while providing protection against power surges.
PDUs are generally equipped with multiple outlets to allow for a variety of electrical devices to be connected and powered simultaneously.
NEW QUESTION # 37
Which one of the following is a Physical Security Device?
- A. Fiber optic cable
- B. Contactless smart card
- C. Access Key
- D. Token card
Answer: B
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 # 38
___________ measures the amount of electrical current flowing through a circuit during a specific time interval.
- A. Ohm
- B. Watts
- C. Volts
- D. Ampere
Answer: D
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 # 39
Which type of outlet is used for non-computing devices?
- A. Convenience
- B. Harmonic
- C. Grounding
- D. Static
Answer: A
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 # 40
If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?
- A. 100 kHz
- B. 1000 Hz
- C. 10 kHz
- D. 100 Hz
Answer: A
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 # 41
Which one of the following is an advantage of Air Cooled Self-Contained System?
- A. Lowest installation cost
- B. It has more heat removal capacity per unit
- C. All components contain more than one unit
- D. It doesn't requires ductwork and/or dropped ceiling
Answer: D
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 # 42
If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?
- A. 100 kHz
- B. 1000 Hz
- C. 10 kHz
- D. 100 Hz
Answer: A
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 # 43
Which one of the following measures the real power drawn by the load equipment?
- A. Amperes
- B. Watts
- C. Amps
- D. Volts
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 # 44
What are the two primary applications of alternating current (AC)?
- A. direct, pulsating
- B. electric, magnetic
- C. static, dynamic
- D. power, information (Selected)
Answer: D
NEW QUESTION # 45
Every air distribution system has a ____________ system and a _________ system
- A. Supply, Reverse
- B. Maintenance, Regulation
- C. Supply, Release
- D. Supply, Return
Answer: D
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.
NEW QUESTION # 46
Which of the following measures the actual power consumed by the load equipment?
- A. Amperes
- B. Watts
- C. Amps
- D. Volts
Answer: B
NEW QUESTION # 47
The distance that a signal's energy can travel in the time it takes for one cycle to occur is called the signal's:
- A. wavelength
- B. period
- C. frequency
- D. amplitude
Answer: A
Explanation:
Explanation
Wavelength is a measure of the distance that a signal's energy can travel in the time it takes for one cycle of the signal to occur. It is calculated by dividing the speed of light by the frequency of the signal. Wavelength is generally expressed in meters (m).
NEW QUESTION # 48
___________ protects electrical equipment from damage caused by overload or short circuit.
- A. Volt switch
- B. IEC cable
- C. Server
- D. Circuit breaker
Answer: D
Explanation:
Explanation
A circuit breaker is a device that protects electrical equipment from damage caused by overload or short circuit. It does this by automatically disconnecting the power supply when it detects a surge or drop in voltage, preventing the equipment from being damaged.
NEW QUESTION # 49
How many approaches are there to remove unwanted heat from an IT environment?
- A. Seven
- B. Six
- C. Four
- D. Five
Answer: D
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 # 50
Which of the following is an example of a physical security identification method?
- A. Voice
- B. Sound
- C. Batch ID
- D. Expression
Answer: D
NEW QUESTION # 51
What are the two main applications for ac (alternate current)?
- A. direct, pulsating
- B. electric, magnetic
- C. static, dynamic
- D. power, information
Answer: D
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 # 52
What are the two main applications for ac (alternate current)?
- A. direct, pulsating
- B. electric, magnetic
- C. static, dynamic
- D. power, information
Answer: D
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 # 53
Which one of the following uses sensors such as laser beams or touch sensor?
- A. CCTV
- B. Backup device
- C. Server
- D. Alarms
Answer: D
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 # 54
What are the two main applications for ac (alternate current)?
- A. direct, pulsating
- B. electric, magnetic
- C. static, dynamic
- D. power, information
Answer: D
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 # 55
Which component protects electrical equipment from overloads or short circuits?
- A. Circuit Breaker
- B. Transfer Switch
- C. Transient
- D. Stabiliser
Answer: A
NEW QUESTION # 56
Which system in Air Distribution System takes the hot exhaust air from the IT equipment to the CRAC
- A. Return system
- B. Maintenance system
- C. Regulation system
- D. Supply system
Answer: A
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 # 57
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