Testout 15.5.7 Practice Questions

A transistor is used to

amplify and switch electrical signals.

A capacitor temporarily stores

an electrical charge.

A power inverter changes

direct current (DC) power to alternating current (AC) power.

A transformer is typically used to

increase or decrease the voltage of AC power.

Most UPS systems include

line conditioners.

Which of the following equipment will also fit in this rack along with the above equipment?

2U UPS

The use of hot and cold aisles within the server room is an effective method for reducing the temp. The front of your servers should face the cold aisle. This allows them to draw in cooler air to reduce the temp of system components. The rear of your servers should face the hot aisle. This ensures the hot air is directed away from other server systems. The hot aisle should face the ac return duct. This allows the heated air to be cooled by the AC system. The cold aisle should face the ac output ducts. This ensures cool air is drawn into servers to cool their components. You've just installed a new 6U wall-mounted rack in your data center. You need to install the following equipment in this rack:

A 4U redundant power supply / A 4U server / A 4U switch A 2U router

Components within your server room are failing at a rapid pace. You discover that the humidity in the server room is at 60% and the temperature is 80 degrees. What should you do to help reduce problems?

Add a separate AC unit in the server room

You manage the website for your company. The website uses a cluster of 2 servers with a single shared storage device. The shared storage device uses a RAID 1 configuration. Each server has a single connection to the shared storage and a single connection to your ISP. You want to provide redundancy so that a failure in a single component does not cause the website to become unavailable. What should you add to your configuration to accomplish this?

Connect one server to the internet through a different ISP.

You have been hired by a startup company to install a new data center. The company is small , so they have elected to use an unused employee break room as the data center. You are concerned about the physical security of the servers that will be installed in the data center. What should you do? (2)

Install a biometric lock on the data center door. Install racks with locking doors.

You have purchased a solar backup power device to provide temporary electrical power to critical systems in your data center should the power provided by the electrical utility company go out. The solar panel array captures sunlight, converts it into direct current and stores it in large batteries. The power supplies in the servers, switches, and routers in your data center require alternating AC to operate. Which electrical device should you implement to convert DC power stored in the batteries into AC power that can be used in the data center?

Inverter

You are adding a new rack to your data center, which will house 2 new blade servers and a new switch. The new servers will be used for virtualization. The only space you have available in the data center is on the opposite side of the room from your existing rack, which already houses several servers, a switch, and a router. You plan to configure a trunk port on each switch and connect them with a straight-through UTP cable that will run across the floor of the data center. To protect equipment from power failures you also plan to install a UPS in the rack along with redundant power supplies for the server. Will this configuration work?

No you should not run a cable across the floor of the data center.

Your 24U rack currently houses 2 4U server systems. To prevent overheating, you've installed a rack-mounted environment monitoring device within the rack. Currently the device shows that the temp is 70 degrees F. What should you do?

Nothing. The temp is within acceptable limits.

You maintain the network for an industrial manufacturing company. You are concerned about the dust in the area getting into server components and affecting the availability of the network. Which of the following should you implement?

Positive pressure system

Beside protecting a computer from under-voltages, a typical UPS also performs which 2 actions?

Protects from over-voltages / Conditions the power signal

Use positive pressure systems. Positive pressure systems protect the air quality in the facility by causing air to be forced out through the doors, windows and other opening. Negative pressure systems draw air in, potentially bringing in airborne particles such as dust, smoke from a fire or contamination from a chemical leak. Positive pressure systems are more energy efficient. Line conditioners are used to improve the quality of the power by performing one or more of the following:

Remove noise caused by EMI and RFI / Providing small amounts of additional power to protect equipment from power dips or sags / Protecting equipment from spike and surges

Which of the following is the least effective power loss protection for computer systems?

Surge protector

You have been struggling to keep the temp in your server room under control. To address this issue, you have decided to reconfigure the room to create hot and cold aisles. Which of the following are true concerning this configuration? (2)

The front of your servers should face the cold aisle. The rear of your servers should face the hot aisle.

You are adding a new rack to your data center, which will house 2 new blade servers and a new switch. The new servers will be used for virtualization. The only space you have available in the data center is on the opposite side of the room from your existing rack, which already houses several servers, a switch, and a router. You plan to configure a trunk port on each switch and connect them with a cross-over UTP plenum cable that will run through the suspended tile ceiling of the data center. To provide power for the new devices you had an electrician install several new 20-amp wall outlets near the new rack. Each device in the rack will be plugged directly into one of these new wall outlets. What is wrong with this configuration? (2)

You should implement a UPS between the wall outlet and the network devices / You should implement redundant power supplies for the network devices