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NEW QUESTION # 23
Which one of the following describes the amount of resistance electricity encounters?
- A. Watts
- B. Ampere
- 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 # 24
Which one of the following is an advantage of Glycol Cooled System?
- A. Can be used in big data centers
- B. No additional cost is required
- C. No maintenance of glycol
- D. Glycol pipes can run long distances and can service several CRAC units
Answer: D
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 # 25
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. It has more heat removal capacity per unit
- C. All components contain more than one unit
- D. Lowest installation cost
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 # 26
What are the two main applications for ac (alternate current)?
- A. direct, pulsating
- B. static, dynamic
- C. electric, magnetic
- 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 # 27
Which mounted system can use any of the five heat removal methodologies?
- A. Chilled Mounted System
- B. Floor Mounted System
- C. Air Mounted System
- D. Ceiling Mounted System
Answer: D
NEW QUESTION # 28
True or False: Human error is a major cause of data center downtime
- A. True
- B. False
Answer: A
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 # 29
A typical data center load would consist of _____ (Choose 3)
- A. Computers
- B. Software
- C. Cooling equipment
- D. Power generator
- E. Networking equipment
Answer: A,C,D
NEW QUESTION # 30
Which one of the following is a disadvantage of Water Cooled System?
- A. Introduces an additional source of liquid
- B. Usage of the building's condenser water is less expensive than chilled water
- C. All components are located inside the CRAC
- D. Condenser water piping loops long distances
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 # 31
___________ measures the amount of electrical current flowing through a circuit during a specific time interval.
- A. Ohm
- B. Watts
- C. Ampere
- D. Volts
Answer: C
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 # 32
Which component is designed to protect electrical equipment from damage caused by overload or short circuit?
- A. Transient
- B. Circuit Breaker
- C. Stabiliser
- D. Transfer Switch
Answer: B
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 # 33
True or False: Fuel availability generally dictates the type of standby generator selected
- A. True
- B. False
Answer: A
Explanation:
Explanation
Fuel availability generally dictates the type of standby generator selected as different types of generators use different types of fuel. For example, gasoline generators are typically used in residential or small commercial applications, while diesel generators are usually used in larger industrial and commercial applications. Propane or natural gas generators may also be used, depending on the availability of fuel sources.
NEW QUESTION # 34
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 transmitted using lighter wires.
- D. AC can be transformed from a low voltage to a high voltage and back again with a transformer. DC cannot.
Answer: D
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 # 35
True or False: A grounded wire is connected to metal appliance cases
- A. True
- B. False
Answer: A
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 # 36
__________ represents the maximum power cable of being drawn by the equipment.
- A. Grade rating
- B. Star rating
- C. Power rating
- D. VA rating
Answer: C
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 # 37
Which one of the following is an overall consideration for physical security?
- A. Apply the solution
- B. Define the problem
- C. Apply the technology
- D. Identify the problem
Answer: B
Explanation:
Explanation
Defining the problem is an important overall consideration for physical security. This process involves identifying and analyzing the threats and vulnerabilities that could potentially affect the security of the system, as well as determining what steps need to be taken to mitigate these risks. This process should be done before any other steps are taken to ensure physical security, as it helps to ensure that the security measures are tailored to the specific needs of the system.
NEW QUESTION # 38
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 # 39
What are the two main applications for ac (alternate current)?
- A. direct, pulsating
- B. static, dynamic
- C. electric, magnetic
- 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 # 40
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