GAS TURBINE EXAM, 3RD CLASS STATIONARY
STEAM ENGINEER LICENSE 300 QUESTIONS &
CORRECT ANSWERS LATEST 2025
Steam turbines are driven by the pressure of high-velocity_____________
discharged at a high pressure and temperature against the turbine vanes. -
ANSWER-steam
A(n) __________ turbine is used as driver for high-differential pressure and high
horsepower applications. - ANSWER-multistage
A ___________ is used to control the speed of the turbine as steam is channeled
through the restrictive component called a nozzle. - ANSWER-governor
Provides a place for the fuel and air to be mixed and then burned. - ANSWER-
combustion chamber
During what stage of a combustion gas turbine can heat recovery take place? -
ANSWER-Compression
Which of the following is true of a non-condensing steam turbine? (select all) -
ANSWER-It is also called a back-pressure turbine / It functions like a pressure
reducing valve / Steam exits at a lower pressure.
,When equipment hazards are associated with a failure to maintain sufficient inlet
steam pressure. (select all) - ANSWER-Machine failure / Turbine shutdown
_______ is a device that uses the combustion of natural gas to spin the turbine
rotor. - ANSWER-Gas Turbine
_______ is a device that is operated or affected by a liquid (water wheel) -
ANSWER-Hydraulic Turbine
_______ is a device that uses a reactive force of pressure or mass of the motive
fluid to turn a rotor; this is an example of newtons third law of motion. - ANSWER-
Reaction Turbine
______ is a device that is driven by the pressure of high-velocity steam. -
ANSWER-Steam Turbine
_________ is a device that uses a directed flow of high velocity fluid against rotor
blades to move the rotor; an example of newtons second law of motion. -
ANSWER-Impulse Turbine
_______ is a device used to control the speed of a piece of equipment, such as a
turbine. - ANSWER-Governor
________ is a blade inside a turbine, attached to the casing, that determines the
direction of the power fluid. - ANSWER-Fixed Blade
,________ components attached to the shaft of the turbine. The motive fluid
causes the turbine to spin by impinging on the rotating blades. - ANSWER-
Rotating Blade
Name in order, with the direction of flow, the components of the Cold section. -
ANSWER-Inlet, Compressor, Diffuser, Accessory Gear Box
Name in order, with the direction of flow, the components of the Hot section. -
ANSWER-Combustor, Turbine, Exhaust
What are the 4 sections of the Gas Turbine that are required for operation in
order with flow direction? - ANSWER-Compressor, Diffuser, Combustor, Turbine
________A duct that increases Velocity of a fluid, while decreasing the Pressure
and Temperature. - ANSWER-Convergent Ducts
______A duct that decreases Velocity of a fluid, while increasing Pressure and
Temperature. - ANSWER-Divergent Ducts
Three factors that affect power output of a gas turbine are, RPM's, air density,
and (______________). - ANSWER-Humidity
What do the letters IGV stand for? - ANSWER-Inlet Guide Vanes
(______________) compressors compress air, parallel to the axis of the machine,
either horizontally or vertically. - ANSWER-Axial Flow Compressor
, A (______________) (___________) is a part of the gas turbine that is needed to
convert the velocity of the air flow into pressure. In the compressor section, these
are placed after every row of rotating blades. - ANSWER-Stationary Vanes
Up, Down, Left, and Right is the type of movement that the journal bearing
prevents. What term is used to describe this movement of the shaft? Referred to
as (____________) movement. - ANSWER-Radial
What type of movement does a Thrust bearing prevent? - ANSWER-Axial
Are transition ducts Convergent or Divergent in shape? - ANSWER-Convergent
The purpose of the (_______________) section is to convert the energy in the gas
stream into mechanical energy. - ANSWER-Turbine
A (___________) edge is the first part of the blade that contacts the air flow and
is the thicker of the two blade edges. - ANSWER-leading
A (____________) edge is thinner and can become damaged more easily by
foreign or domestic debris. - ANSWER-Trailing
What does S.O.A.P stand for? - ANSWER-Spectrometric Oil Analysis Program
Describe a Can Combustor. - ANSWER-Multiple inner cases & Multiple outer cases
Describe an Annular Combustor - ANSWER-One inner case, and One outer case
STEAM ENGINEER LICENSE 300 QUESTIONS &
CORRECT ANSWERS LATEST 2025
Steam turbines are driven by the pressure of high-velocity_____________
discharged at a high pressure and temperature against the turbine vanes. -
ANSWER-steam
A(n) __________ turbine is used as driver for high-differential pressure and high
horsepower applications. - ANSWER-multistage
A ___________ is used to control the speed of the turbine as steam is channeled
through the restrictive component called a nozzle. - ANSWER-governor
Provides a place for the fuel and air to be mixed and then burned. - ANSWER-
combustion chamber
During what stage of a combustion gas turbine can heat recovery take place? -
ANSWER-Compression
Which of the following is true of a non-condensing steam turbine? (select all) -
ANSWER-It is also called a back-pressure turbine / It functions like a pressure
reducing valve / Steam exits at a lower pressure.
,When equipment hazards are associated with a failure to maintain sufficient inlet
steam pressure. (select all) - ANSWER-Machine failure / Turbine shutdown
_______ is a device that uses the combustion of natural gas to spin the turbine
rotor. - ANSWER-Gas Turbine
_______ is a device that is operated or affected by a liquid (water wheel) -
ANSWER-Hydraulic Turbine
_______ is a device that uses a reactive force of pressure or mass of the motive
fluid to turn a rotor; this is an example of newtons third law of motion. - ANSWER-
Reaction Turbine
______ is a device that is driven by the pressure of high-velocity steam. -
ANSWER-Steam Turbine
_________ is a device that uses a directed flow of high velocity fluid against rotor
blades to move the rotor; an example of newtons second law of motion. -
ANSWER-Impulse Turbine
_______ is a device used to control the speed of a piece of equipment, such as a
turbine. - ANSWER-Governor
________ is a blade inside a turbine, attached to the casing, that determines the
direction of the power fluid. - ANSWER-Fixed Blade
,________ components attached to the shaft of the turbine. The motive fluid
causes the turbine to spin by impinging on the rotating blades. - ANSWER-
Rotating Blade
Name in order, with the direction of flow, the components of the Cold section. -
ANSWER-Inlet, Compressor, Diffuser, Accessory Gear Box
Name in order, with the direction of flow, the components of the Hot section. -
ANSWER-Combustor, Turbine, Exhaust
What are the 4 sections of the Gas Turbine that are required for operation in
order with flow direction? - ANSWER-Compressor, Diffuser, Combustor, Turbine
________A duct that increases Velocity of a fluid, while decreasing the Pressure
and Temperature. - ANSWER-Convergent Ducts
______A duct that decreases Velocity of a fluid, while increasing Pressure and
Temperature. - ANSWER-Divergent Ducts
Three factors that affect power output of a gas turbine are, RPM's, air density,
and (______________). - ANSWER-Humidity
What do the letters IGV stand for? - ANSWER-Inlet Guide Vanes
(______________) compressors compress air, parallel to the axis of the machine,
either horizontally or vertically. - ANSWER-Axial Flow Compressor
, A (______________) (___________) is a part of the gas turbine that is needed to
convert the velocity of the air flow into pressure. In the compressor section, these
are placed after every row of rotating blades. - ANSWER-Stationary Vanes
Up, Down, Left, and Right is the type of movement that the journal bearing
prevents. What term is used to describe this movement of the shaft? Referred to
as (____________) movement. - ANSWER-Radial
What type of movement does a Thrust bearing prevent? - ANSWER-Axial
Are transition ducts Convergent or Divergent in shape? - ANSWER-Convergent
The purpose of the (_______________) section is to convert the energy in the gas
stream into mechanical energy. - ANSWER-Turbine
A (___________) edge is the first part of the blade that contacts the air flow and
is the thicker of the two blade edges. - ANSWER-leading
A (____________) edge is thinner and can become damaged more easily by
foreign or domestic debris. - ANSWER-Trailing
What does S.O.A.P stand for? - ANSWER-Spectrometric Oil Analysis Program
Describe a Can Combustor. - ANSWER-Multiple inner cases & Multiple outer cases
Describe an Annular Combustor - ANSWER-One inner case, and One outer case
