Site Orientation / Security
What is our building address and building number
10051 Brickyard Way, Manassas, VA 20171
&
IAD51
What is LOTO
Lock out Tag out and it ensures equipment cannot be reenergized
What is dew point
Temperature at which condensation begins to form
(-1000 points if your answer includes the word "cloud")
What fuel do our generators use
Ultra Low Sulfer Disel
What are the 3 conditions on a FACP
Trouble - Faults that can prevent proper operation (ex: NAC fault)
Supervisory - Changed of operational state of equipment, system, or process (ex: gen running)
Alarm - Detected alarm condition from component (smoke detection)
What are Digital Realty's core values
1.) Customer Focused
2.) Results Driven
3.) Teamwork
What is an SPD and how many per line up
Surge Protector Device and 3 2 (2 in electrical room and 1 in your generator enclosure)
True or False.
XDMs are backed by UPS
False.
Only thing backed by UPS on XDMs are the pumps
What are the 4 strokes of an engine
2.) Compression
3.) Combustion
4.) Exhuast
Hot Work Permit
What are the 3 event types and description
Green - Equipment has a fault/failure but doesn't affect load/redundancy
Yellow - No loss of load but loss of redundancy
Red - Loss of customers load
What load is carried by G-PNL 2
1.) Pre-action/Vesda
2.) Dampers
3.) Lights
4.) Receptacles
5.) *Humidifers* ?
What causes TES to go discharge mode and how does it go into recharge mode
TES go into discharge mode when water goes 3 degrees over set point and will go into recharge mode once temp is .5 degrees within setpoint
3 conditions that must be met before the SCR system activates
1.) Gen running
2.) Gen carrying 40% load
3.) SCR temp of 575 degrees
Closed
What is our management hierarchy
Andy Power - CEO
Steve Smith - Managing Director, Americas
Ryan Young - VP, Americas Operations (VP of AO)
Andy Cuttia - Director of East America
John Limbacher - Market Technical Manager (MTM)
Kevin Ahart - Sr. Manager Data Center Ops (MDCO)
Stephan Moyer / Waddaice Schoonover -Manager Engineering Operations (MEO)
What is a UPS function and normal sequence of operation
1.) Provide uninterrupted conditioned power
2.) UPS input → Rectifier (AC/DC) to trickle charge batteries → Inverter (DC/AC) → UPS Output
What is superheat and subcooling and why and where does it occur in the refrigeration cycle
Heating/Cooling to ensure change of state of refrigerant
Superheat occurs before the compressor to ensure refrigerant is vapor because you don't want liquid in the compressor
Subcooling occurs before the metering device to ensure refrigerant is liquid because you don't want vapor in the metering device
When is the Ozone season and constraints come with that
May 1st - Sep 30th and no running of gens during 0700-1700
The main 3 different gauges and purpose in a Pre-Action
1. System Air Pressure -Pressure in dry piping (the top pipe)
2.) Priming Pressure - Water pressure closing the Deluge valve (piping on the left of deluge valve)
3.) Water Supply Pressure - Incoming water pressure from water entry room (bottom)
How do we handle yellow/red events
1.) Gather info regarding what's the issue (5-10 Min)
2.) Contact MEO (Wade or Moyer)
3.) Call GCC within 15 minutes of event
Normal electrical flow path starting from utility to server rack
Utility 230KV → Substation 34.5KV → Vista Switch → Step Down Transformer 480V → CT → Switch Gear → UPS → PDU → RPP → Server Rack
What is the 4 main components in order of the refrigeration cycle to include main purpose and state of refrigeration
Compressor - Pushes refrigerant through the system (Hot High PSI Gas)
Condenser - Heat Rejector (Hot High PSI Liquid)
Metering Device - Pressure dropper (Low cold PSI Saturated mix)
Evaporator - Heat Absorber (Low cold PSI Liquid)
How does the generator uses fuel into electrical energy
Fuel is utilized by the engine which then spins the rotor that houses the stator (coils of wire) which spins against a magnetic field creating electrical energy
What happens if you get 2 active smoke detectors but no breaking of a sprinkler head
2 active smoke heads (electrical) will prime/activate the solenoid valve but IT WON'T open until your sprinkler head breaks (mechanical signal)