HVAC- Control Building Flashcards
1
Q
Unit 1 is operating at rated power. A CREFAS is manually initiated with both trains of Control Room Essential AFUs running. Window 7B01A “INST AIR SYSTEM TROUBLE” alarms. Instrument Air header pressure is noticed to be lowering. If the air problem continues to degrade, the Control Room Essential AFUs….
A. will trip.
B. ventilation lineup will not change.
C. will lose cooling water.
D. outside air dampers will fail open.
A
Answer: B
2
Q
EC Train has been declared inoperable due to a pump failure. What is the Maximum Out of Service Time for CREATCS as determined by the SafetyFunction Determination Procedure. (Assume CREATCS is inoperable solely due to its support system EC being inoperable)
A. 144 hours
B. 72 hours
C. 792 hours
D. 720 hours
A
Answer: C
