GSM Test Study Guide Questions &
Answers 2024/2025
Who is creddited with inventing the jet engine? - ANSWERSHero
Define an open cycle. - ANSWERSAll working fluid passes through the engine only once.
How is a GTE classified? - ANSWERSCompressor, combustion, or shaft design
What are the two types of compressors? - ANSWERSAxial and Centrifugal
What are the 3 types of shaft design? - ANSWERSSingle, split, or twin spool
LM2500 rated at? (hp) - ANSWERS20,000 brake horsepower
LM2500 pt rated at? - ANSWERS3,600 rpm
How many shock mounts does the LM2500 have? - ANSWERS32 shock mounts
Characteristics of a fireproof enclosure - ANSWERS2000*F for 15mins
What schedules VSV position. - ANSWERSGG and CIT
By hydraulic fuel pressure from the MFC
How much air from the compressor is actually used for combustion? - ANSWERS30%
How much air from the compressor is used for cooling, seal pressurization, and ships service use? -
ANSWERS70%
,MFC uses what for fuel scheduling - ANSWERSCIT, CDP, and Ngg
MFC uses what for VSV actuation - ANSWERSGG and CIT
What bearings are in the C sump? - ANSWERS5R and 6R
What bearings are in the B sump? - ANSWERS4R and 4B
What type of oil seal prevents leakage into sumps - ANSWERSLabryinth/windback
What is ignition speed for a GTM - ANSWERS1,200rpm
What rpm are the igniters secured? - ANSWERS4,500rpm
What stage is used as bleed air. (CDP) - ANSWERS16 stage
What Is the Pt2 - ANSWERSCompressor Inlet total pressure
What is the Pt5.4 - ANSWERSPower turbine inlet total Pressure
What is T2 - ANSWERSCompressor Inlet Temperature
What is T5.4 - ANSWERSPower turbine Inlet gas temperature
When date were both GSE and GSM put into effect? - ANSWERSOctober 1,1978
What does the bell logger do? - ANSWERSLegal document of any engine order regarding a change in the
movement of the propeller.
,What is the maximum allowable BS&W of an acceptable replenishment F/O sample? - ANSWERS0.1
percent
What is the designation for JP5? What NSTM? - ANSWERSF-44
NSTM 542
What is the tech manual for boilers? - ANSWERSNSTM 220
What two phosphates do boilers use? - ANSWERSTrisodium phosphate(TSP)
Disodium phosphate (DSP)
What is the NSTM for propulsion reduction gears? - ANSWERSNSTM 241
What is Charles law? - ANSWERSIf pressure is constant. Volume varies directly with temp
What is Boyle's Law? - ANSWERSIf temperature remains the same. Volume decreases as pressure
increases
What is the equation of Celsius to Fahrenheit? - ANSWERSF=(9/5C)+32
What gear does the turning gear drive? - ANSWERSUpper outboard second reduction pinion
How much oil does the vent fog precipitator remove from the air? - ANSWERS95%
What is medium air? - ANSWERS551psi to 1000psi
What kind of motor driven line oil pumps do we have? - ANSWERSVertical screw
Positive displacement
, Flexibly couple to motor
How many twists per inch of .020 are required? - ANSWERS9-12 twists
How many twists per inch of .032 are required? - ANSWERS7-10 twists
What year was the GS rate created? - ANSWERS1978
How are NSTM's kept up-to-date? - ANSWERSBy quarterly changes
What is the primary objective of the 3M system? - ANSWERSTo ensure maximum operational readiness
A deferred action must be prepared if a piece of equipment t CANNOT be repaired within what minimum
time frame? - ANSWERS30 days
What standing order applies specifically to engineering? - ANSWERSRestricted maneuvering doctrine
What shipboard document provides info for reporting, fighting, and extinguishing a fire - ANSWERSThe
ship's fire doctrine
How often do the cheng and CO sign the engineering log? - ANSWERSCheng- daily
CO- last day of month
What colors are used for safety posters? - ANSWERSRed and yellow
How many thermocouples are on a GTM? - ANSWERS11
How many thermocouples are on a GTG? - ANSWERS18
Answers 2024/2025
Who is creddited with inventing the jet engine? - ANSWERSHero
Define an open cycle. - ANSWERSAll working fluid passes through the engine only once.
How is a GTE classified? - ANSWERSCompressor, combustion, or shaft design
What are the two types of compressors? - ANSWERSAxial and Centrifugal
What are the 3 types of shaft design? - ANSWERSSingle, split, or twin spool
LM2500 rated at? (hp) - ANSWERS20,000 brake horsepower
LM2500 pt rated at? - ANSWERS3,600 rpm
How many shock mounts does the LM2500 have? - ANSWERS32 shock mounts
Characteristics of a fireproof enclosure - ANSWERS2000*F for 15mins
What schedules VSV position. - ANSWERSGG and CIT
By hydraulic fuel pressure from the MFC
How much air from the compressor is actually used for combustion? - ANSWERS30%
How much air from the compressor is used for cooling, seal pressurization, and ships service use? -
ANSWERS70%
,MFC uses what for fuel scheduling - ANSWERSCIT, CDP, and Ngg
MFC uses what for VSV actuation - ANSWERSGG and CIT
What bearings are in the C sump? - ANSWERS5R and 6R
What bearings are in the B sump? - ANSWERS4R and 4B
What type of oil seal prevents leakage into sumps - ANSWERSLabryinth/windback
What is ignition speed for a GTM - ANSWERS1,200rpm
What rpm are the igniters secured? - ANSWERS4,500rpm
What stage is used as bleed air. (CDP) - ANSWERS16 stage
What Is the Pt2 - ANSWERSCompressor Inlet total pressure
What is the Pt5.4 - ANSWERSPower turbine inlet total Pressure
What is T2 - ANSWERSCompressor Inlet Temperature
What is T5.4 - ANSWERSPower turbine Inlet gas temperature
When date were both GSE and GSM put into effect? - ANSWERSOctober 1,1978
What does the bell logger do? - ANSWERSLegal document of any engine order regarding a change in the
movement of the propeller.
,What is the maximum allowable BS&W of an acceptable replenishment F/O sample? - ANSWERS0.1
percent
What is the designation for JP5? What NSTM? - ANSWERSF-44
NSTM 542
What is the tech manual for boilers? - ANSWERSNSTM 220
What two phosphates do boilers use? - ANSWERSTrisodium phosphate(TSP)
Disodium phosphate (DSP)
What is the NSTM for propulsion reduction gears? - ANSWERSNSTM 241
What is Charles law? - ANSWERSIf pressure is constant. Volume varies directly with temp
What is Boyle's Law? - ANSWERSIf temperature remains the same. Volume decreases as pressure
increases
What is the equation of Celsius to Fahrenheit? - ANSWERSF=(9/5C)+32
What gear does the turning gear drive? - ANSWERSUpper outboard second reduction pinion
How much oil does the vent fog precipitator remove from the air? - ANSWERS95%
What is medium air? - ANSWERS551psi to 1000psi
What kind of motor driven line oil pumps do we have? - ANSWERSVertical screw
Positive displacement
, Flexibly couple to motor
How many twists per inch of .020 are required? - ANSWERS9-12 twists
How many twists per inch of .032 are required? - ANSWERS7-10 twists
What year was the GS rate created? - ANSWERS1978
How are NSTM's kept up-to-date? - ANSWERSBy quarterly changes
What is the primary objective of the 3M system? - ANSWERSTo ensure maximum operational readiness
A deferred action must be prepared if a piece of equipment t CANNOT be repaired within what minimum
time frame? - ANSWERS30 days
What standing order applies specifically to engineering? - ANSWERSRestricted maneuvering doctrine
What shipboard document provides info for reporting, fighting, and extinguishing a fire - ANSWERSThe
ship's fire doctrine
How often do the cheng and CO sign the engineering log? - ANSWERSCheng- daily
CO- last day of month
What colors are used for safety posters? - ANSWERSRed and yellow
How many thermocouples are on a GTM? - ANSWERS11
How many thermocouples are on a GTG? - ANSWERS18
