Module 31 - Environmental Security and Controls - Q&A

Question 1

All of the following are causes of electromagnetic interference (EMI), except.
A. Lightning
B. Electrical motors
C. Fluorescent lighting
D. Broadcast storms

Answer 1

D. Broadcast storms are the result of excessive broadcast traffic on the network; they do not cause and are not related to EMI.

Question 2

Which of the following are possible indications of a fire that can be detected through monitoring and detection equipment? (Choose all that apply.)
A. Heat
B. Smoke
C. Light variation
D. Smell

Answer 2

A, B, C. Heat, smoke, and light variation can be detected as indications of a fire by modern monitoring equipment. Although the smell of burning materials cannot be detected by fire detection equipment, harmful gases that result from burning certain materials can be detected.

Question 3

Which of the following types of fires is most likely the result of faulty computer equipment?
A. Flammable liquid
B. Electrical
C. Flammable metal
D. Ordinary combustible

Answer 3

B. Electrical fires are most commonly associated with faulty computer equipment.

Question 4

Your manager wants you to make sure that enough fire extinguishers are available in the data center to take care of possible  electrical fires. Which class of fire extinguishers should be used in the data center?
A. Class A
B. Class B
C. Class C
D. Class D

Answer 4

C. Class C fire extinguishers are the appropriate type used in electrical fires.

Question 5

Heating, ventilation, and air conditioning (HVAC) systems control all of the following environmental factors in a data center, except.
A. Power
B. Temperature
C. Humidity
D. Air filtration

Answer 5

A. Power is not controlled by HV AC systems.

Question 6

Too much humidly can cause \_\_\_ _, and too little humidity can cause \_\_\_\_ . (Choose two.)
A. evaporation
B. condensation
C. static electricity
D. electrical ground issues

Answer 6

B, C. Humidity levels can cause condensation or static electricity issues with electrical equipment.

Question 7

Which of the following devices would be used to measure humidity levels in a data center?
A. Power conditioner
B. Voltage regulator
C. Thermometer
D. Hygrometer

Answer 7

D. A hygrometer is used to measure humidity levels.

Question 8

Which of the following describes how equipment racks are set up in a hot and cold aisle design?
A. With the front sides of equipment facing each other
B. So cold air blows into all aisles
C. With the front sides of one row facing the back sides of another
D. So hot air blows into all aisles

Answer 8

A. Equipment racks are set up in a hot and cold aisle design with the front sides of equipment facing each other.

Question 9

Which of the following may be centrally monitored by environmental monitoring systems?
A. Bandwidth
B. Humidity
C. Throughput
D. Transmit/receive errors

Answer 9

B. Humidity is monitored by centralized environmental monitoring systems.

Question 10

Which of the following problems would environmental monitoring systems be able to detect and correct automatically?
A. Decrease in air quality due to smoke from smoldering electronics
B. Failed power supplies in equipment
C. Temperature increases due to manual thermostat changes
D. Humidity decreases due to failed HVAC equipment

Answer 10

C. Temperature increases due to manual thermostat changes can be corrected by automatic environmental monitoring systems, if they are configured to do so.