CDCP General 4 — Questions and Answers
Question 1: What is the recommended inlet temperature range for most data center server equipment according to ASHRAE A1 class guidelines?
- 50–59°F (10–15°C)
- 64–80°F (18–27°C) (Correct answer)
- 85–95°F (29–35°C)
- 41–50°F (5–10°C)
Correct answer: 64–80°F (18–27°C)
ASHRAE A1 class equipment specifies an allowable inlet temperature range of 59–77°F (15–25°C), with the recommended range slightly wider at 64–80°F.
Question 2: Which fire suppression system is most commonly used in active data center rooms due to its equipment-safe characteristics?
- Wet pipe sprinkler system
- Dry pipe sprinkler system
- Clean agent gaseous suppression system (Correct answer)
- Foam deluge system
Correct answer: Clean agent gaseous suppression system
Clean agent systems (such as FM-200 or Novec 1230) suppress fires without water damage to sensitive electronic equipment.
Question 3: What is 'stranded power' in a data center context?
- Power allocated to a rack but not actually consumed by installed equipment (Correct answer)
- Power lost due to faulty wiring
- Power from renewable energy sources not yet connected
- Backup generator power held in reserve
Correct answer: Power allocated to a rack but not actually consumed by installed equipment
Stranded power refers to power capacity allocated (reserved) on paper for equipment that never consumes its rated maximum, reducing effective capacity.
Question 4: In data center cabling, what does an MDA (Main Distribution Area) connect to?
- Directly to end-user devices only
- Horizontal Distribution Areas (HDA) or Equipment Distribution Areas (EDA) (Correct answer)
- Only to external carrier networks
- Directly to patch panels in server racks
Correct answer: Horizontal Distribution Areas (HDA) or Equipment Distribution Areas (EDA)
Per ANSI/TIA-942, the MDA is the core of the data center cabling infrastructure, connecting to HDAs and sometimes directly to EDAs.
Question 5: What is the main purpose of raised floor plenum space in a traditional data center?
- Structural support for heavy server racks
- Distribution of chilled air to equipment inlets (Correct answer)
- Cable management for power circuits only
- Water drainage from cooling systems
Correct answer: Distribution of chilled air to equipment inlets
Raised floor plenums act as a pressurized cold air chamber that distributes cooling air through perforated tiles to equipment cold aisles.
Question 6: Which standard defines the data center Tier classification system used worldwide by Uptime Institute?
- ANSI/TIA-942
- Uptime Institute Tier Standard: Topology (Correct answer)
- ISO/IEC 22237
- BICSI 002
Correct answer: Uptime Institute Tier Standard: Topology
The Uptime Institute's own 'Tier Standard: Topology' document defines Tier I through Tier IV classifications and is separate from TIA-942.
Question 7: What does DCIM stand for and what is its primary function?
- Data Center Infrastructure Management — monitoring and managing data center assets and resources (Correct answer)
- Digital Content Information Module — managing digital media files
- Data Center Internet Monitoring — tracking bandwidth usage
- Distributed Computing Infrastructure Model — cloud architecture planning
Correct answer: Data Center Infrastructure Management — monitoring and managing data center assets and resources
DCIM software integrates IT and facility management to monitor, measure, and manage data center power, cooling, space, and assets.
CDCP General 4
What is the recommended inlet temperature range for most data center server equipment according to ASHRAE A1 class guidelines?