This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.
This Website Uses Cookies
By closing this message or continuing to use our site, you agree to our cookie policy. Learn More
This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.
Mission Critical logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Mission Critical logo
  • Magazine
    • Current Issue
    • Digital Edition
    • The Optimal Edge
    • IT-Colo Strategic Planner
    • Subscribe
    • Single Copy Sales
    • Editorial Calendar
  • News
    • Industry News
    • Coronavirus Coverage
    • Case Studies
    • Events Calendar
    • International Data Center Day
  • Products
    • New Products
  • Technologies
    • 5G
    • Cloud Computing
    • Cybersecurity
    • Edge Computing
    • Infrastructure
    • Power
  • Operations
    • Building Commissioning
    • Decommissioning
    • Facility Design
    • Life Safety
    • Site Selection
    • Thermal Management
    • Training and Education
  • Columns
    • Writing on the Edge
    • Hot Aisle Insight
    • MC Skills Exchange
    • On Target Series
    • Real (Estate) Talk
    • Unconventional Wisdom
    • Guest Column
    • Sustainable Operations
  • Multimedia
    • Videos
    • Podcasts
    • Photo Galleries
    • Infographics
    • Webinars
    • eNewsletter
  • Contests
    • Most Critical Player Award
    • Top Tier Product Awards
    • Women in Technology
  • Directory
    • Buyers Guide
    • Get Listed
    • Take a Tour
  • Resources
    • Quizzes
    • White Papers
    • Glossary
    • Technical Advisory Board
    • Store
    • Classifieds
    • Partners
    • Market Research
    • Custom Content & Marketing Services
    • Continuing Education
    • DCEP
    • Jooble
  • Contact
    • Contact Us
    • Advertise
    • Editorial Guidelines
Home » Thank You For The Submission!

Thank You For The Submission!

check-mark-icon80
You are all set!

 

Thank you for filling out the Data Center Cooling Quiz!

You will receive a confirmation email shortly.

↻ Back to the Data Center Cooling Quiz


 

For More Information On the Data Center Cooling, view these articles:


Answers:

  1. If the top sensor on a rack is showing a high temp alarm, what can you do?
    1. Check blanking panel placement
    2. Disable sensor and re-enable at a later time
    3. Open floor tile to bring temp back in spec
    4. Tell customer it will fix itself
    5.  

  2. If you receive an alarm on your cooling tower for a high water temp, what should you check first?
    1. Check for bird strikes
    2. Check to see if fan is running
    3. Monitor chemical levels
    4. None of the above
    5.  

  3. Dirty filters on a computer room air condition (CRAC) unit can cause excessive condensate to build up in the unit and cause a “water under floor” alarm.
    1. True
    2. False
    3.  

  4. What causes a low-pressure alarm in a CRAC unit?
    1. The belts haven’t been adjusted properly
    2. Blower motor failure
    3. Loss of refrigerant
    4. Restricted airflow
    5. Dirty filters
    6. All of the above
    7.  

  5. What is the primary mechanical difference between CRACs and computer room air handlers (CRAHs)?
    1. CRACs have refrigeration compressors as part of their primary system
    2. CRAHs have refrigeration compressors as part of their primary system
    3. CRACs cannot control humidity at supply like CRAHs can
    4. CRAHs can not be isolated from the rest of the HVAC system for maintenance
    5.  

  6. Which of the following is NOT a benefit of ‘cold aisle containment’?
    1. Increased efficiency of HVAC systems
    2. Better control of peak temperature in the server racks
    3. Work environment for technicians when compared to ‘hot aisle containment’
    4. No need for ‘tile management’
    5.  

  7. What is the primary concern of having too low of humidity in your HVAC system?
    1. Condensation collecting in the server racks
    2. Static build up that can cause major electrical damage
    3. Personal comfort is reduced
    4. Fluctuating temperatures in the HVAC cycle
    5.  

  8. What are the benefits of proper ‘tile management’ in your data center? (Mark all that apply)
    1. Tighter control of temperature regulation
    2. Reducing the cost of cooling
    3. Higher concentration of humidity under the floor
    4. More even distribution of cooled air to the entire server rack
    5.  

  9. What is the biggest disadvantage to having too many perforated tiles in a datacenter
    1. It overloads the CRAC units supporting the space
    2. It reduces the overall underfloor pressure, while also reducing overall cooling impact
    3. It starves CRAC units from return air which overloads fans
    4. It is bad for the environment due to increased C02 from overworked compressors
    5.  

  10. Raised floor cooling can help provide directed cooling by placing perforated tiles only in areas where you would like to direct cooling. What is the standard  volume of air that perforated tiles can provide.
    1. 150 to 250 CFM
    2. 300 to 400 CFM
    3. 450 to 550 CFM
    4. 500 to 600 CFM
    5.  

  11. Which of the following is NOT in the ‘refrigeration cycle’?
    1. Condenser
    2. Compressor
    3. Aeration
    4. Expansion
    5.  

  12. Which of these allow for cooling through a refrigeration cycle?
    1. Heat of Compression
    2. Heat Transfer dynamics
    3. Low boiling point compounds
    4. All of the above
    5.  

  13. What is “heat density” in terms of a data center’s HVAC system?
    1. The average temperature of all sensors/racks
    2. The lowest temperature and highest temperature in the environment added then divided by two
    3. The temperature average in an area, but not the entire site.
    4. Any noticeable temperature difference when moving through a Cold aisle
    5.  

  14. In Compound-X, which has a boiling point of 100°F, what is an example of it being in a super heated state?
    1. Compound-X in a gaseous state with a temperature of 105°F
    2. Compound-X in a liquid state with a temperature of 105°F
    3. Compound-X in a gaseous state with a temperature of 100°F
    4. Compound-X in a liquid state with a temperature of 95°F
    5.  

  15. What is the biggest advantage to direct exchange (DX) cooling systems
    1. Easiest and most cost efficient to maintain
    2. Accepts long piping distances
    3. Air coolers can support multiple devices
    4. Greater cooling capacity due to direct exchange
    5.  

  16. Why would it be more cost effective to have a cooler maximum temperature within your datacenter as opposed to using less compressor cooling?
    1. It isn’t more cost effective, you are using compressors more which cost more energy
    2. When too hot, Computer systems can ramp up their internal fans which can greatly impact the overall KW used within a datacenter.
    3. Fan speeds on CRAC units will be lower at colder temperatures, reducing overall electrical load
    4. Thermal efficiency of CRAC units is always better with lower temperatures.
    5.  

  17. What is a common cause for a drop in under floor pressures in a raised floor environment?
    1. Fan speeds are not high enough
    2. Hot isle causing low pressure in cooler areas
    3. Poorly sealed wiring and cabling cutouts leading under floor within racks.
    4. Too many perforated tiles for the given AC tonnage
    5. Both C & D are correct
    6.  

  18. What is the lowest possible PUE in full EconoPhase operation?
    1. 1.05
    2. 1.30
    3. 1.35
    4. 1.55
    5.  

  19. Which statement below is not part of the basic refrigeration cycle?
    1. Compressor takes a refrigerant vapor in from the low pressure side of the circuit, and discharges it at a much higher pressure into the high pressure side of the circuit.
    2. When the refrigerant passes through the evaporator the refrigerant transfers its heat to the air and turns into a liquid.
    3. When the hot refrigerant vapor discharged from the compressor travels through the condenser, the cool air or water flowing through the condenser coil absorbs enough heat from the vapor to cause it to condense.
    4. The expansion valve is designed to maintain a specific rate of flow of refrigerant into the low side of the system.
    5.  

  20. What are the benefits of rack temperature monitoring?
    1. Provide accurate indication of temperature going into the equipment
    2. Provide a means to control cooling to the equipment
    3. Provide alarm indication if temperature exceeds its set limit
    4. All of the above
    5.  


 

Explore More on Mission Critical Magazine

Subscribe For Free!
  • Digital Edition Subscription
  • eNewsletter
  • Online Registration
  • Subscription Customer Service

More Videos

Popular Stories

2021

2021 Predictions

Top 20

The Top 20 of 2020

Vantage-Zurich

Vantage on Schedule to Deliver 40-MW Hyperscale Campus Near Zurich

ON-TARGET.jpg

Celebrating Women Across the Industry

Seven Points of Resilient Data Center Operations

Seven Points of Resilient Data Center Operations

12/8 MC Kohler webinar

Events

December 30, 2030

Webinar Sponsorship Information

For webinar sponsorship information, visit www.bnpevents.com/webinars or email webinars@bnpmedia.com.

View All Submit An Event

Products

Handbook of Data Center Management, Second Edition (CRC Press Revivals)

Handbook of Data Center Management, Second Edition (CRC Press Revivals)

See More Products
12/16 MC Veritiv webinar

Mission Critical Magazine

MC Cover Image

2021 January

Start the year off right — read about the latest in cloud computing, cybersecurity, and power solutions in our January issue.
View More Create Account
  • Resources
    • List Rental
    • Security Group
    • Product Info (Free)
    • Editorial Guidelines
    • Survey And Sample
  • Want More
    • Connect
  • Privacy
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2021. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing