PASGT SEMIFINAL QUIZ 1

Why must the turning gear be disengaged before starting the turbine?

• To improve fuel atomization and combustion chamber ignition efficiency

• To avoid severe mechanical damage during rapid rotor acceleration

• To purge residual moisture from the intake before startup

• To keep bearing temperatures low during pre-start cooling

Why is a controlled cool-down phase required after load reduction?

• To allow the lubrication system to circulate oil for extended periods

• To keep the turbine casing temperature slightly elevated for next restart

• To prevent thermal shock, material stress, and rotor bowing during cooldown

• To support the ignition system in maintaining stable flame conditions

Why is maintaining a correct fuel-air ratio important during operation?

• To extend the service life of the fuel pump and burner nozzles

• To slow the rate of exhaust gas expansion and rotor acceleration

• To ensure efficient combustion while avoiding thermal stress and incomplete burning

• To improve lubricating oil flow rate throughout the system

Why should lubrication pumps remain operational during a turbine rundown?

• To prevent bearing wear or damage while the rotor decelerates under inertia

• To regulate exhaust gas flow and stabilize post-combustion cooling

• To enable the turbine to accelerate quickly on the next startup

• To preheat the fuel system before shutdown is complete

What is the primary purpose of gradual load application during startup?

• To reduce vibration in the reduction gear before coupling to the shaft

• To activate trip circuits and alarms before the ignition stage

• To enable maximum thrust to be reached more quickly and efficiently

• To avoid thermal shock, material expansion issues, and allow steady stabilization

Why is PPE essential during turbine operation?

• To optimize cooling air distribution and reduce blade temperature

• To reduce exhaust gas temperature during post-combustion operation

• To protect personnel from risks such as intense noise, radiant heat, and fire hazards

• To extend the operating life of major rotating components

Why must foreign object debris (FOD) be removed before startup?

• To minimize temperature fluctuations in the exhaust sensor array

• To accelerate combustion chamber ignition and airflow response

• To allow intake pressure to rise more rapidly during initial startup

• To prevent blade erosion, imbalance, and potentially catastrophic fractures

Why must operators respond immediately to alarm conditions?

• To accelerate load transition and improve performance during transients

• To delay automatic trip signals and extend operation beyond normal limits

• To optimize idle fuel consumption and efficiency during low-load operation

• To prevent system faults from escalating into major failures or accidents

Why is sudden load change strongly discouraged during operation?

• Because it can reduce exhaust temperature and minimize pressure oscillations

• Because it may cause compressor surge, intense vibration, or even flameout

• Because it reduces lubrication oil flow during startup conditions

• Because it improves turbine thermal efficiency and combustion quality

Why must emergency drills be conducted on a regular schedule?

• To ensure the crew is prepared to respond quickly and effectively to real emergencies

• To minimize false alarms and reduce the number of automatic trips

• To eliminate the need for detailed safety documentation or records

• To reduce turbine start-up times and speed up operational readiness