1
Q
Explain how bearing oil header pressure is maintained
A
The booster pump turbine lowers pressure to 100#
a pressure regulating relief valve further lowers pressure to 25# at front standard
2
Q
State turbine trip due to Main Oil Pump (MOP)
A
- Discharge pressure <100# on 2/3 switches if >75% speed
- Bearing oil header pressure <12# on 2/3
3
Q
State auto start of Motor Suction Pump (MSP)
A
If Main Oil Pump (MOP) suction pressure <10#
this pump is back up to the booster
4
Q
State auto start of Turning Gear Oil pump (TGOP)
A
- Main oil pressure <190#
- Bearing oil pressure <15#
5
Q
State auto start of Emergency Bearing Oil pump (EBOP)
A
- MOP discharge <180# 1/2 AND
- TGOP discharge <17.5# 1/2
OR - TGOP power is lost
6
Q
State auto start of Bearing Lift pumps
A
- EPS @ LR1 with lift pump suction pressure >6#
OR - Armed and TGOP >/= 10#
7
Q
State purpose and precaution of the Vapor Extractor
A
- Removes H2 gases, moisture and air from the reservoir when online
- When off line it needs to be shut down to prevent dirt and air from being sucked through the turbine bearings
