Gas Turbine - Assistant Engineer

The thermal energy added to the gas as it flows through the combustion section has what effect on the gas?

In a gas turbine, the air charge is permitted to be compressed adiabatically by what factor, process, or condition? ...

The Brayton Cycle is a series of events best described by which of the following statements?

Why is a gas turbine considered to operate on the Brayton cycle?

In a twin-spool turbine, secondary air is most essential for cooling in what section?

Which of the following statements is true regarding centrifugal compressors?

A centrifugal compressor assembly consists of which of the following?

While air is being compressed in a centrifugal flow gas turbine, what happens to the direction of air flow?

What is the disadvantage of a dual-entry centrifugal compressor compared to a single-entry centrifugal compressor?

When working with gas turbine synthetic lube oil, which of the following safety measures should always be observed? ...

When working in or around intake areas, which of the following precautions should be taken?

On the GE LM2500 gas turbine engine, magnetic pickups are utilized for what purpose?

In a gas turbine propulsion installation, the typical control system is designed to perform which of the following three...

Thermal energy is the only form of energy that can be added to or removed from a substance. How is thermal energy that i...

Rankine is the temperature scale that corresponds to which of the following?

Which of the following terms refers to thermal energy in transition?

Kelvin is the absolute temperature scale that corresponds to which of the following?

What is the term given to a process that occurs without a loss or gain of heat?

Which of the following is the definition of absolute temperature?

What is the purpose of the spring in a lip-type oil seal?

What type of air seal is used in the combustor and turbine mid-frame of a gas turbine?

What type of seal is used in the gearbox of a gas turbine engine?

What type of air seal is used in the sump and turbine areas of a gas turbine engine?

Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine engin...

Which of the following statements is true concerning the fuel oil ignition system of the gas turbine engine shown in the...

How is the HP turbine rotor of the GE LM2500 gas turbine cooled?

Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure?

What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine?

How many shock mounts are used to secure the GE LM2500 gas turbine enclosure to the ship's foundation?

The gas generator section of the GE LM2500 gas turbine is composed of all of the following components EXCEPT which of th...

The struts of the GE LM2500 compressor front frame provide passages for all of the following mediums EXCEPT which of the...

What type of combustor is used by the GE LM2500 gas turbine?

In comparing a centrifugal-type to an axial-type compressor, which of the following statements is true?

The two basic types of compressors used in gas turbine engines are which of the following?

Rotation of the Controllable Pitch Propeller (CPP) blades is achieved through axial movement of what component in the hu...

The fuel oil system of a gas turbine engine provides all EXCEPT which of the following?

Gas turbine fuel manifold pressure is established by which of the following actions?

Before combustion can occur, the combustion air must be delivered to the combustor at a high-pressure and low-velocity. ...

In a centrifugal compressor, which component reduces the velocity and increases the static pressure of the air?

Which of the following wrenches should NOT be used while working on a gas turbine?

Which of the following instruments is designed to help you when performing an internal inspection of the gas turbine eng...

The only hand tools that should be used on gas turbine engines are chrome plated, nickel plated, or which of the followi...

Wrenches that are recommended for use on gas turbine engines should be plated with which of the following elements? ...

Provisions for avoiding the build-up of ice on the intake air surfaces of a gas turbine plant can be found where?

The divergent area of the exhaust duct aids in what process?

How is the clutch shown in the attached illustration engaged? Illustration GT-0018

The term "lockout" on the Synchro-Self-Shifting (SSS) clutch system means that the _______________.

How do you manually lockout an SSS clutch?

Which of the following statements is true about the "lockout control" on a Synchro-Self-Shifting (SSS) clutch?

As shown in the illustration of a gas turbine fuel oil system, when the engine fuel oil valves are de-energized, the rem...

What is the primary function of the main fuel control on the GE LM2500 gas turbine engine?

For the GE LM2500 gas turbine shown in the illustration, the 9th stage bleed air is used for which of the following? Ill...

For the GE LM2500 gas turbine engine shown in the illustration, the 13th stage bleed air is used for which of the follow...

In order to get a ready indication for a normal start with an GE LM2500 gas turbine engine, what permissive(s) must be m...

For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage nozzle vanes are cooled by whic...

For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by whic...

For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage blades are cooled by convection...

Turbine disks are commonly attached to the shaft by which of the following methods?

To keep the exit pressures relatively constant across a HP turbine blade, which type of construction is generally utiliz...

HP turbine blades are generally cooled by which of the following methods?

Which of the following designs is the most satisfactory method for attaching turbine blades to the rotor disk?

"Standard Day" conditions, as defined by the ISO, is which of the following?

In the ignition system of a gas turbine engine, how is optimum spark achieved?

What is the power source for the ignition exciter of a gas turbine engine?

What is the most common type of spark igniter used on a gas turbine engine?

On a propulsion marine gas turbine, if full power temperatures become excessive, what action should the operator take? ...

If the lube oil scavenge temperature exceeds 300 degrees Fahrenheit on the gas turbine engine shown in the illustration,...

Accelerometers are generally used on gas turbine engines to sense which of the following?

Displacement, velocity and acceleration describe three types of which of the following?

When removing the gas turbine engine as shown in the illustration, how is the engine removal accomplished? Illustration ...

Which of the following could cause compressor stall?

The two main types of compressor stall are known as what?

What is the term given to the condition in which cyclic pressure changes result in a repetitive failure and recovery of ...

How can compressor stall be prevented?

Compressor surge is caused by which of the following factors?

When a compressor is in a stall condition, what will happen to the combustor and turbine temperatures?

The acronym MFC represents which of the following?

The acronym CDP stands for which of the following?

The acronym GG represents which of the following?

The acronym VSV represents which of the following?

The acronym FOD stands for which of the following?

Power is defined as which of the following?

Which of the following statements correctly describes force?

Mechanical work is defined as which of the following?

Potential energy is defined as which of the following?

What is the term used to describe the stationary vanes preceding the first stage of an axial compressor?

Variable stator vanes give an axial gas turbine compressor which of the following capabilities?

Two functions of the compressor stator vanes include which of the following?

What is the function of the stator in a axial gas turbine compressor?

An axial compressor stator vane that is mechanically adjusted to provide optimum compressor performance over a wide oper...

The main reduction gear performs which of the following functions?

What type of main reduction gear arrangement prevents independent axial and rotational movement of the pinions?

The purpose of the main reduction gear in a marine gas turbine propulsion installation is which of the following?

What feature is commonly used on articulated reduction gear arrangements for the correction of misalignment between the ...

In a gas turbine engine, the majority of the energy is added to the working fluid in which of the following components? ...

A centrifugal-flow gas turbine uses what type of combustion chamber?

The three most common types of combustors used in gas turbine engines are which of the following?

Which of the following statements concerning fluid flow is true?

The term "divergent" is best described as which of the following?

Why is the cycle efficiency higher in the intercooled-recuperated cycle as compared to a simple cycle gas turbine? Illus...

A gas turbine engine in which exhaust gas heat energy is added to the compressor air charge before entering the combusto...

A gas turbine engine in which exhaust gas heat energy is added to the air charge between the compressor and combustion c...

A gas turbine engine’s main lube oil system pump check valve serves to maintain system prime and perform what other func...

How is the lube oil supplied to each bearing in a gas turbine engine controlled?

The electrostatic vent fog precipitator removes oil mist from which of the following areas?

When the main reduction gear lube oil system is secured, which of the following components maintains the air within the ...

For the gas turbine engine lube oil system shown in the illustration, what is the purpose of the lube oil supply check v...

The lube oil scavenge pressure on the marine gas turbine shown in the illustration is sensed by which of the following? ...

While standing watch on a ship equipped with the gas turbine engine shown in the illustration, a fire emergency stop is ...

An open cycle gas turbine engine is best described by which of the following statements?

What is the difference between an open cycle and a closed cycle gas turbine engine?

Which of the following are the principle factors that affect the performance of a gas turbine compressor?

Compressor characteristics are normally summarized in the form of which of the following?

In a typical gas turbine propulsion plant, the main thrust bearing directly positions which part(s) of the main reductio...

Which of the following is a disadvantage of utilizing a gas turbine versus a diesel engine for propulsion?

Compared to other types of engines, what is the biggest advantage of a gas turbine engine?

Which of the following drawbacks of a gas turbine engine provides the greatest potential for injury to personnel? ...

Newton's Second Law of Motion states which of the following?

Newton's Third Law of Motion states which of the following?

Newton's First Law of Motion states which of the following?

The bleed air surge relief valve differs from a normal relief valve in which of the following ways?

All clock positions, engine references, and enclosure references apply to viewing the gas turbine engine shown in the il...

On a vessel equipped with propulsion gas turbines, the operators initial response to a high vibration alarm should be wh...

Which of the following is the principle that a magnetic speed sensor/pickup operates on?

A magnet pickup typically produces what type of signal output?

In the operation of a marine propulsion gas turbine, kinetic and thermal energy required to drive the main propeller sha...

How do the high-velocity high-temperature gases cause the gas turbine rotor to rotate?

The turbine nozzles convert heat and pressure energy to velocity energy by means of which of the following?

A turbine stage is represented by which of the following components and in which order?

The gas generating sections of marine gas turbine engines are based on which of the following?

What are two common methods of power turbine blade retention?

Which of the following is a feature of a power turbine blade that is not found on a high temperature turbine blade? ...

Accelerating the compressor to the self sustaining speed of the engine is the function of which of the following compone...

What type of engine starter motor is commonly found on the marine gas turbine shown in the illustration? Illustration GT...

What type of starter is commonly used on smaller gas turbine engines?

Which of the following statements is true about an axial compressor disk-type rotor?

The primary function of an axial compressor rotor blade is which of the following?

Why are loose-fitting blades used on the first several stages of large axial compressors?

What is a compressor midspan shrould?

What are the two common forms of axial compressor rotor blade roots?

The lube oil system shown in the illustration, is designed to lubricate the main bearings by what principle? Illustratio...

As shown in the illustration, what is the purpose of pressurizing the main bearing lube oil sumps on a typical marine ga...

On the gas turbine engine lube oil system shown in the illustration, air and oil are primarily separated in the air/oil ...

On the marine gas turbine engine shown in the illustration, the 8th stage bleed air is used for which of the following? ...

The lube oil system shown in the illustration, consists of which of the following sub-systems? Illustration GT-0024 ...

What is the purpose of the air/oil separator shown in the illustration of the gas turbine lube oil system? Illustration ...

The turbine nozzles function to direct the gases in what direction?

What are the two principle functions of the turbine nozzle guide vanes?

The circle of turbine stationary vanes that convert pressure and thermal energy to velocity energy and direct the combus...

What method is utilized to allow turbine nozzle blades to withstand high inlet temperatures?

The turbine nozzle blades convert the combustion gases heat and pressure energy into what form of energy?

Which of the following conditions permits a gas turbine to produce 100% power?

On most marine gas turbines used aboard ships, vibration sensors are identified as which of the following?

Routine water washing of the gas turbine engine compressor shown in the illustration, is usually performed while operat...

The two primary sources of deposits that build up on compressor blades are?

When auto starting a gas turbine engine similar to the one shown in the illustration, a "False Start" indication will i...

During an auto-start sequence on the marine gas turbine control console shown in the illustration, what would be the cor...

Aboard ship, single-shaft gas turbines are used mostly as prime movers for which of the following applications?

Which of the following is an advantage of a single-shaft gas turbine engine compared to a split-shaft gas turbine engine...

In a single shaft, cold-end drive gas turbine, the power output speed has what relationship to the speed of the compress...

Which of the following is the main advantage of a split axial compressor case?

A pressure stage of an axial-type compressor consists of which of the following?

Each stage of an axial-compressor of a gas turbine can compress the atmospheric air a total of how many times? ...

The purpose of the metal spray rub coating on the rotor and stator casing of an axial type compressor is which of the fo...

An axial compressor basically consists of which of the following?

An axial compressor stage is represented by which of the following components and in which order?

Which of the following components removes the oil from the transfer gearbox?

The short length of the can-annular combustion chamber provides for which of the following conditions?

Ball or roller antifriction bearings are used to support gas turbine rotors for all EXCEPT which of the following?

Under standard atmospheric conditions, 208.7 PSIG converts to approximately what in absolute pressure?

A temperature of 69.5 degrees Fahrenheit converts to approximately what temperature in degrees Rankine?

A temperature of 32.5 degrees Celsius converts to approximately what temperature in degrees Kelvin?