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The thermal energy added to the gas as it flows through the combustion section has what effect on the gas?
Increase volume
In a gas turbine, the air charge is permitted to be compressed adiabatically by what factor, process, or condition?
Speed of the process
The Brayton cycle is a series of events best described by which of the following statements?
Intake, compression, combustion, expansion, exhaust
Suck, squeeze, bang, blow (basically)
Why is a gas turbine considered to operate on the Brayton cycle?
Combustion occurs with now increase in pressure
In a twin-spool turbine, secondary air is most essential for cooling in what section?
HP turbine
Which of the following statements is true regarding centrifugal compressors?
The centrifugal compressor is frequently used on small, low pressure turbines.
A centrifugal compressor assembly consist the following.
A rotating impeller and a stationary diffuser.
While air is being compressed in a centrifugal flow gas turbine, what happens to the direction of air flow?
Changes at each separate component.
What is the disadvantage of using a dual-entry centrifugal compressor compared to a single-entry centrifugal compressor?
The dual-entry compressor utilizes a more complicated inlet ducting.
When working on gas turbine synthetic lube oil, which of the following safety measures should be observed?
Multiple: wash area thoroughly, avoid skin contact. Avoid prolonged inhaling of vapors. Wear eye protection and gloves.
All the above
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