turbo 2

The diffuser section of a jet engine is located between

• A. The burner section and the turbine section
• B. Station Nº 7 and station Nº8
• C. the compressor section and the burner section.

When the leading edge of a first-stage turbine blades is found to have stress rupture cracks, which of the fol-lowing should be suspected?

• A. Faulty cooling shield
• B. Overtemperature condition.
• C. Overspeed condition.

Turbine blades are generally more susceptible to operating damage than blades because of

• A. Higher centrifugal loading
• B. Exposure to high temperatures
• C. High pressure and high velocity gas flow.

Which of the following is the ultimate limiting factor of turbine engine operation?

• A. Compressor inlet air temperature
• B. Turbine inlet temperature
• C. Burner-can pressure

The recurrent ingestion of dust or other fine airborne particulates into a turbine can result in.

• A. Foreign object damage to the compressor section.
• B. The need for less frequent abrasive grit cleaning of the engine
• C. Erosion damage to the compressor and turbine sections

Which of the following engine variables is the most critical during turbine engine operation?

• A. Compressor inlet air temperature
• B. Compressor RPM
• C. Turbine inlet temperature

Reduced blades vibration and improved airflow char-acteristics in gas turbines are brought about by

• A. Fir-tree blades attachment
• B. Impulse type blades
• C. Shrouded turbine rotor blades

Which turbine engine compressor offers the great-est advantages for both starting flexibility and improved high-altitude performance?

• A. Dual-stage, centrifugal-flow
• B. Split-spool, axial-flow
• C. Single-spool, axail-flow

Jet engine turbine blades removed for detailet inspection must be reinstalled in

• A. A specified slot 180º away
• B. A specified slot 90º away in the direction of rotation
• C. The same slot

An advantage of the centrifugal-flow compressor is its high

• A. Pressure rise per stage
• B. Ram efficiency
• C. Peak efficiency