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Controls and Monitoring Preliminary Test
RETURN TO KNOWLEDGE TEST SELECTION
What is the right sequence of events and checks to be done for turbine starting?
Emergency pump test, Auxiliary Ready to Crank, Auxiliary Start Passed, Auxiliary Ready to fire, Auxiliary Ready to Load
Auxiliary Ready to Start, Emergency pump test, Auxiliary Start Passed, Auxiliary ready to Fire, Auxiliary ready to Crank, auxiliary Ready to Load
Auxiliary Ready to Start, Emergency pump test, Auxiliary Start Passed, Auxiliary ready to Crank, Auxiliary ready to Fire, Auxiliary Ready to Load
The same pressure is detected by three sensors, the sensor readings are: sensor A = 11 bar-g, sensor B = 16 bar-g, sensor C = 9 bar-g. What is the pressure value that is used inside the controller logic?
The function of wheelspaces temperature sensors is:
To measure the air temperature between the GG and PT wheels.
To measure the air temperature between shaft and wheel to avoid mechanical stress.
To measure the air temperature at the junction between buckets and wheel to avoid mechanical stress.
According to the following logic, gsf3_ft becomes TRUE if:
If gsf3 is less than both krtdhi and krtdlo.
If gsf3 is less than (at least) one between krtdhi and krtdlo.
If gsf3 is less than krtdlo or greater than krtdhi.
How must be set the jumpers J1A and J1B to connect a two wires transmitter (4-20 mA) not externally powered to Input 1?
J1A = 20mA & J1B = Open
J1A = 20mA & J1B = Ret
J1A = V dc & J1B = Open
What does the T48 temperature indicate for an aeroderivative Gas Turbine?
Gas Generator exhaust temperature.
Turbine compressor outlet temperature.
Power turbine exhaust temperature.
The instrument configuration shown below means:
The two instruments are acquired by the control system but are not shown on the graphic pages.
The two instruments are acquired by the control system and shown on the graphic pages.
The two instruments are shown on the graphic pages but not used on the control logic.
During normal operation (startup sequence completed), the mineral lube oil auxiliary pump (88QA-1/2):
Automatically starts when lube oil pressure is low and automatically stops when the lube oil normal pressure is restored.
Automatically starts when lube oil pressure is low but does not automatically stop when the lube oil normal pressure is restored.
What are the bleed valves for a heavy-duty Gas Turbine?
Bearing air vent valves.
Air cooling bypass valves.
Axial compressor bypass valves.
Can the GT start if any TRIP or SHUTDOWN is active but no longer present?
Yes if the operator ACK ALL the alarms.
Yes if the operator does a MASTER RESET.
A type of RTD is named PT100 because:
The main metal is platinum and the nominal resistance at 0 °C is 100 Ohm.
The main metal is platinum and the nominal resistance at 0 °F is 100 Ohm.
The main metal is platinum and the nominal resistance at 100 °F is 100 Ohm.
The mineral lube oil header pressure is controlled through the PCV valve:
By control system.
By safety control system.
By the PCV itself.
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