GSM NAMTS Exam Questions &
Answers 2024/2025
(290.08 Tee Handle Puller) The pullers are manufactured from _____. - ANSWERS3/4" high grade
aluminum
(131.17 Borescope Inspection) What is the name of the specially designed viewing device that is a
precision and monocular device used for the visual inspection of internal parts of a gas turbine without
the need for disassembly? - ANSWERSBorescope
(131.17 Borescope Inspection) What malfunction is the primary cause of DOD to the HP turbine? -
ANSWERSBlade cracking
(131.17 Borescope Inspection) LP turbine inlet probes extend radially into the gas path and can be
removed to inspect the _____? - ANSWERSHP turbine exhaust
(131.17 Borescope Inspection) Why is it good engineering practice to review machinery history prior to
performing a borescope inspection? - ANSWERSYou will discover the status of parts that have been
changed or modified
(131.17 Borescope Inspection) What will blade rub on the compressor case cause? - ANSWERSTip curl
(131.17 Borescope Inspection) What are the two basic types of object damage found during a borescope
inspection? - ANSWERSFOD, DOD
(131.17 Borescope Inspection) What is a blade that has a crack on the aft side of the dovetail and is
leaning in the forward direction is known as? - ANSWERSA leaner
(131.17 Borescope Inspection) What is an engine preparation prerequisite to complete borescope
inspections in order to to achieve an accurate evaluation of an engine's condition? - ANSWERSEngine
water washing
,(131.19 Special Support Equipment for LM2500) In the case of an LM2500 what color are the anodized
rails for FFG-7 and DD-963 class? - ANSWERSClear
(131.19 Special Support Equipment for LM2500) In the case of a LM2500 what color are the anodized
rails that are unique to DD-963 and CG-47 class designs? - ANSWERSClear
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 what tow bar device provides
a means of towing empty gas generator and power turbine dollies between storage and dockside
locations? - ANSWERSDockside dollies
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 Support Equipment. How
many dollies are required to complete a gas generator replacement? - ANSWERS2
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 what support fixture is
designed to support the forward end of the exhaust duct outer cone when disconnected from the
turbine rear frame? - ANSWERSGenerator cone
(131.19 Special Support Equipment for LM2500) What installation clamping set is used to retain O-rings
when installing air/oil seals at No. 3, 4, 5, 6, and 7 bearings? - ANSWERSO-ring installation clamping set
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 which installation guide pins
are used when installing engine bearings or seals to prevent damage to the bearing housings? -
ANSWERSBearing and seal
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 which protective cover set
consists of a four-piece locking cover for the power turbine forward end and a bag-type cover for the
power turbine aft end at the turbine rear frame? - ANSWERSPower turbine
(131.19 Special Support Equipment for LM2500) Which support fixture is designed to function as a
bracket, and supports the shaft shroud out of the way allowing access to the high speed coupling shaft
aft flexible coupling? - ANSWERSShroud
,(131.19 Special Support Equipment for LM2500) Special Support Equipment (SSE) storage locations are
identified by painted tool shadows and SSE part numbers marked on the container walls. Shadow color
code "Red" designates tools to be used on what class ships? - ANSWERSFFG-7
(131.19 Special Support Equipment for LM2500) Special Support Equipment (SSE) storage locations are
identified by painted tool shadows and SSE part numbers marked on the container walls. Shadow color
code "Blue" designates tool use on what class of ships? - ANSWERSCG-47
(131.20 Special Support Equipment for Allison 501-K17/K34) When is the PTO midbearing guide tool
used? - ANSWERSWhen the PTO assembly is removed from the reduction gear housing
(131.19 Special Support Equipment for LM2500) For an LM2500, what does the over speed transducer
clearance gauge measure? - ANSWERSThe tip clearance between the speed sensor ring and the over
speed transducer
(131.20 Special Support Equipment for Allison 501-K17/K34) Where is the generator turbine unit lifting
adapter attached? - ANSWERSTurbine inlet casing-to-outer combustion chamber casing split line
(131.19 Special Support Equipment for LM2500) What type of instrument is the Igniter Plug Immersion
Gauge? - ANSWERSVernier depth gauge
(131.20 Special Support Equipment for Allison 501-K17/K34) What is the front mount pivot adapter set
used for? - ANSWERSTo rotate and support the gas generator front mount support when removing the
gas generator
(131.19 Special Support Equipment for LM2500) What is the gas generator horizontal lift fixture used
for? - ANSWERSMove the gas generator into and out of the GG shipping container
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which cover is
installed on the turbine inlet when the engine has been disassembled and moved to a vertical position? -
ANSWERSTurbine rotor
, (131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which adapter
attaches to the turbine shaft and is used to vertically remove and install the turbine rotor in the rear
bearing support? - ANSWERSTurbine rotor lift ring
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which wrench is
used when disassembling the turbine front bearing and oil seal? - ANSWERSCoupling clamp nut wrench
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which barring tool
is installed on the reduction gear after the starter is removed? - ANSWERSTurbine barring tool
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, what device is used
to remove the bearing outer race and rollers when they are to be removed? - ANSWERSOuter race drift
(131.20 Special Support Equipment for Allison 501-K17/K34) Which pins are installed through the
primary and secondary seal assemblies to align the rear compressor bearing components for assembly? -
ANSWERSDiffuser guide pins
(131.20 Special Support Equipment for Allison 501-K17/K34) What stand is used to disassemble and
reassemble the Allison 501K series engine? - ANSWERSSupport stand
(131.20 Special Support Equipment for Allison 501-K17/K34) Unless otherwise specified, what must all
gas turbine engine fasteners, such as nuts, bolts and screws be lubricated with? - ANSWERSGas turbine
engine lube oil
(131.20 Special Support Equipment for Allison 501-K17/K34) What tool mounts on the rear side of the
rear turbine bearing support assembly, and is used to support and align the wrenches used on the
tiebolt lock-nut and turbine to compressor tiebolt? - ANSWERSClamp nut wrench
(131.20 Special Support Equipment for Allison 501-K17/K34) What kit in the Allison 501-K17/K34 SSE
Change Out Van (COV) provides the adapters and gages necessary to pressurize the engine container
with inert gas (nitrogen) for shipment or storage. - ANSWERSEngine container pressurization kit
(131.60 Mechanical Fundamentals) A duplex sea water strainer is what kind of valve? - ANSWERSPlug
Answers 2024/2025
(290.08 Tee Handle Puller) The pullers are manufactured from _____. - ANSWERS3/4" high grade
aluminum
(131.17 Borescope Inspection) What is the name of the specially designed viewing device that is a
precision and monocular device used for the visual inspection of internal parts of a gas turbine without
the need for disassembly? - ANSWERSBorescope
(131.17 Borescope Inspection) What malfunction is the primary cause of DOD to the HP turbine? -
ANSWERSBlade cracking
(131.17 Borescope Inspection) LP turbine inlet probes extend radially into the gas path and can be
removed to inspect the _____? - ANSWERSHP turbine exhaust
(131.17 Borescope Inspection) Why is it good engineering practice to review machinery history prior to
performing a borescope inspection? - ANSWERSYou will discover the status of parts that have been
changed or modified
(131.17 Borescope Inspection) What will blade rub on the compressor case cause? - ANSWERSTip curl
(131.17 Borescope Inspection) What are the two basic types of object damage found during a borescope
inspection? - ANSWERSFOD, DOD
(131.17 Borescope Inspection) What is a blade that has a crack on the aft side of the dovetail and is
leaning in the forward direction is known as? - ANSWERSA leaner
(131.17 Borescope Inspection) What is an engine preparation prerequisite to complete borescope
inspections in order to to achieve an accurate evaluation of an engine's condition? - ANSWERSEngine
water washing
,(131.19 Special Support Equipment for LM2500) In the case of an LM2500 what color are the anodized
rails for FFG-7 and DD-963 class? - ANSWERSClear
(131.19 Special Support Equipment for LM2500) In the case of a LM2500 what color are the anodized
rails that are unique to DD-963 and CG-47 class designs? - ANSWERSClear
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 what tow bar device provides
a means of towing empty gas generator and power turbine dollies between storage and dockside
locations? - ANSWERSDockside dollies
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 Support Equipment. How
many dollies are required to complete a gas generator replacement? - ANSWERS2
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 what support fixture is
designed to support the forward end of the exhaust duct outer cone when disconnected from the
turbine rear frame? - ANSWERSGenerator cone
(131.19 Special Support Equipment for LM2500) What installation clamping set is used to retain O-rings
when installing air/oil seals at No. 3, 4, 5, 6, and 7 bearings? - ANSWERSO-ring installation clamping set
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 which installation guide pins
are used when installing engine bearings or seals to prevent damage to the bearing housings? -
ANSWERSBearing and seal
(131.19 Special Support Equipment for LM2500) In the case of an LM2500 which protective cover set
consists of a four-piece locking cover for the power turbine forward end and a bag-type cover for the
power turbine aft end at the turbine rear frame? - ANSWERSPower turbine
(131.19 Special Support Equipment for LM2500) Which support fixture is designed to function as a
bracket, and supports the shaft shroud out of the way allowing access to the high speed coupling shaft
aft flexible coupling? - ANSWERSShroud
,(131.19 Special Support Equipment for LM2500) Special Support Equipment (SSE) storage locations are
identified by painted tool shadows and SSE part numbers marked on the container walls. Shadow color
code "Red" designates tools to be used on what class ships? - ANSWERSFFG-7
(131.19 Special Support Equipment for LM2500) Special Support Equipment (SSE) storage locations are
identified by painted tool shadows and SSE part numbers marked on the container walls. Shadow color
code "Blue" designates tool use on what class of ships? - ANSWERSCG-47
(131.20 Special Support Equipment for Allison 501-K17/K34) When is the PTO midbearing guide tool
used? - ANSWERSWhen the PTO assembly is removed from the reduction gear housing
(131.19 Special Support Equipment for LM2500) For an LM2500, what does the over speed transducer
clearance gauge measure? - ANSWERSThe tip clearance between the speed sensor ring and the over
speed transducer
(131.20 Special Support Equipment for Allison 501-K17/K34) Where is the generator turbine unit lifting
adapter attached? - ANSWERSTurbine inlet casing-to-outer combustion chamber casing split line
(131.19 Special Support Equipment for LM2500) What type of instrument is the Igniter Plug Immersion
Gauge? - ANSWERSVernier depth gauge
(131.20 Special Support Equipment for Allison 501-K17/K34) What is the front mount pivot adapter set
used for? - ANSWERSTo rotate and support the gas generator front mount support when removing the
gas generator
(131.19 Special Support Equipment for LM2500) What is the gas generator horizontal lift fixture used
for? - ANSWERSMove the gas generator into and out of the GG shipping container
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which cover is
installed on the turbine inlet when the engine has been disassembled and moved to a vertical position? -
ANSWERSTurbine rotor
, (131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which adapter
attaches to the turbine shaft and is used to vertically remove and install the turbine rotor in the rear
bearing support? - ANSWERSTurbine rotor lift ring
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which wrench is
used when disassembling the turbine front bearing and oil seal? - ANSWERSCoupling clamp nut wrench
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, which barring tool
is installed on the reduction gear after the starter is removed? - ANSWERSTurbine barring tool
(131.20 Special Support Equipment for Allison 501-K17/K34) For the Allison 501-K17, what device is used
to remove the bearing outer race and rollers when they are to be removed? - ANSWERSOuter race drift
(131.20 Special Support Equipment for Allison 501-K17/K34) Which pins are installed through the
primary and secondary seal assemblies to align the rear compressor bearing components for assembly? -
ANSWERSDiffuser guide pins
(131.20 Special Support Equipment for Allison 501-K17/K34) What stand is used to disassemble and
reassemble the Allison 501K series engine? - ANSWERSSupport stand
(131.20 Special Support Equipment for Allison 501-K17/K34) Unless otherwise specified, what must all
gas turbine engine fasteners, such as nuts, bolts and screws be lubricated with? - ANSWERSGas turbine
engine lube oil
(131.20 Special Support Equipment for Allison 501-K17/K34) What tool mounts on the rear side of the
rear turbine bearing support assembly, and is used to support and align the wrenches used on the
tiebolt lock-nut and turbine to compressor tiebolt? - ANSWERSClamp nut wrench
(131.20 Special Support Equipment for Allison 501-K17/K34) What kit in the Allison 501-K17/K34 SSE
Change Out Van (COV) provides the adapters and gages necessary to pressurize the engine container
with inert gas (nitrogen) for shipment or storage. - ANSWERSEngine container pressurization kit
(131.60 Mechanical Fundamentals) A duplex sea water strainer is what kind of valve? - ANSWERSPlug
