1|Page
MACHINIST MATE EXAM LATEST EXAM QUESTIONS
AND CORRECT ANSWERS (ALREADY GRADED A+) |
PROFESSOR VERIFIED | LATEST VERSION 2025
What NSTM deals with propulsion and SSTG Turbines? - (answers)NSTM 231
Whats type of rotary pump is frequently used as a lubricanting pump on pumpe
and other aux equipment? - (answers)Simple gear pimp
What is the normal length of a tapered plug? - (answers)3"
What is installed on a non-condensing turbone to protect turbine casing from
excessive pressure? - (answers)Combination exhaust relief valve 2-3 psi above
exhaust line pressure
On an SSTG, what protects turbine casing from excessive pressure? -
(answers)Back pressure trip
When starting an SSTG, what is a minimum lube oil temp? - (answers)60 degrees
What are the four sections of a PQS? - (answers)Fundamentals, systems,
watchstations, qual card
What is the number for a PMS feedback report? - (answers)4790/7B
When should oil coolers be put into operation on aux machinery? -
(answers)When temp of lube oil leaving cooler is 100 degrees
DFT is designed to operate at what pressure and temp? - (answers)15 psi and 240-
250 degrees
What is installed on a centrifugal pump to eliminate renewing of an entire
propellor and pump casing due to rapid wear? - (answers)Wearing rings
The federal water pollution control act was amended in what year? -
(answers)1970
,2|Page
What is the NSTM for compressed air systems? - (answers)551
What is the max allowable pressure drop across a fuel oil duplex strainer when
online? - (answers)3%
What is the NSTM for general reduction gear? - (answers)241
What is the NSTM for forced draft blowers? - (answers)554
What is the required amount of sodium nitrate used for a sodium nitrate wet lay
up? - (answers)10lbs per 1,000 gallons of feed water
What is the NSTM for insulation and lagging? - (answers)635
What is QA chapter 11? - (answers)QA forms and instructions
What is QA chapter 12? - (answers)Submarine preservation
What is QA chapter 13? - (answers)Wire removal and replacement
What is QA chapter 10? - (answers)Quality assurance records
What is QA chapter 9? - (answers)Audits, surveillance, evaluations and
assesments
What is QA chapter 3? - (answers)PQS and training
What is QA chapter 2? - (answers)Quality maintenance process
What is QA chapter 4? - (answers)Welder, brazer, and NDT qualifications
What is QA chapter 5? - (answers)In process control
When is the current ships maintenance project verified and updated? -
(answers)Monthly
PMS schedules are categorized in what manner? - (answers)Cycle, quarterly,
,3|Page
weekly
Main feed pump is classified as what type of pump? - (answers)Multi stage
High speed
Turbine driven
How long must the engine room/fire room operating log be kept for? - (answers)2
years
Main feed pumps are fitted with what two types of governors? - (answers)Speed
limiting
Constant speed
the number of revolutions to major speed change is entered in what column? -
(answers)3
Entries for astern pitch are preceded by what level? - (answers)B
What is the max allowable super heater outlet temp during transition periods of
15mins - 1 hour on a 1200 psig D type boiler? - (answers)1020 degrees
What is the first action taken, when you are experiencing difficulty in maintaining
boiler water level on an automated ship? - (answers)Shift boiler feed water
control to remote/manual
In the engineering bell book, what does I mean? - (answers)Ahead standard speed
In the engineering bell book, what does III mean? - (answers)Ahead flank speed
In the engineering bell book, what does B 1/3 mean? - (answers)Back 1/3 speed
In the engineering bell book, what does Z mean? - (answers)Stop
In the engineering bell book, what does BF mean? - (answers)Back full speed
In the engineering bell book, what does BEM mean? - (answers)Back emergency
speed
, 4|Page
In the engineering bell book, what does II mean? - (answers)Ahead full speed
When order received is recorded as RPM in what column? - (answers)2
What QA for is used for testing and inspection? - (answers)QA form 17
Boiler high water alarm is set to what parameter - (answers)+7 inches
During a white smoke casualty to a boiler, what must never be adjusted? -
(answers)Fuel oil header pressure
What temp is lube oil maintained on an operating main engine? - (answers)120-
130 degrees
A ruptured feed water control valve diaphragm will have what adverse effect on
boiler water level? - (answers)Water level increase
Valve will fail open
Maximum steady state superheater outlet temp on a D type 1200 psig boiler? -
(answers)1000 degrees
During loss of vacuum casualty on a main condenser, what action must be taken
when vacuum decreases to 15"? - (answers)Main engine must be stopped and
casualty procedure IAW EOCC
Temporary distortion of SSTG rotor numerous start/stop episodes is known as
what? - (answers)Bowed rotor
Whenever a propulsion turbine casing joint is opened for any reason, a final
contact check is required by taking a red and blue check of the made up joint,
what is the required contact for non pumping groove joints? - (answers)75%
contact over entire joint, 1/4" minimum continuous contact inside the groove and
across each pressure section
What is the function of staff packing on SSTG - (answers)Prevent leakage of stem
from ingress of air into turbines
MACHINIST MATE EXAM LATEST EXAM QUESTIONS
AND CORRECT ANSWERS (ALREADY GRADED A+) |
PROFESSOR VERIFIED | LATEST VERSION 2025
What NSTM deals with propulsion and SSTG Turbines? - (answers)NSTM 231
Whats type of rotary pump is frequently used as a lubricanting pump on pumpe
and other aux equipment? - (answers)Simple gear pimp
What is the normal length of a tapered plug? - (answers)3"
What is installed on a non-condensing turbone to protect turbine casing from
excessive pressure? - (answers)Combination exhaust relief valve 2-3 psi above
exhaust line pressure
On an SSTG, what protects turbine casing from excessive pressure? -
(answers)Back pressure trip
When starting an SSTG, what is a minimum lube oil temp? - (answers)60 degrees
What are the four sections of a PQS? - (answers)Fundamentals, systems,
watchstations, qual card
What is the number for a PMS feedback report? - (answers)4790/7B
When should oil coolers be put into operation on aux machinery? -
(answers)When temp of lube oil leaving cooler is 100 degrees
DFT is designed to operate at what pressure and temp? - (answers)15 psi and 240-
250 degrees
What is installed on a centrifugal pump to eliminate renewing of an entire
propellor and pump casing due to rapid wear? - (answers)Wearing rings
The federal water pollution control act was amended in what year? -
(answers)1970
,2|Page
What is the NSTM for compressed air systems? - (answers)551
What is the max allowable pressure drop across a fuel oil duplex strainer when
online? - (answers)3%
What is the NSTM for general reduction gear? - (answers)241
What is the NSTM for forced draft blowers? - (answers)554
What is the required amount of sodium nitrate used for a sodium nitrate wet lay
up? - (answers)10lbs per 1,000 gallons of feed water
What is the NSTM for insulation and lagging? - (answers)635
What is QA chapter 11? - (answers)QA forms and instructions
What is QA chapter 12? - (answers)Submarine preservation
What is QA chapter 13? - (answers)Wire removal and replacement
What is QA chapter 10? - (answers)Quality assurance records
What is QA chapter 9? - (answers)Audits, surveillance, evaluations and
assesments
What is QA chapter 3? - (answers)PQS and training
What is QA chapter 2? - (answers)Quality maintenance process
What is QA chapter 4? - (answers)Welder, brazer, and NDT qualifications
What is QA chapter 5? - (answers)In process control
When is the current ships maintenance project verified and updated? -
(answers)Monthly
PMS schedules are categorized in what manner? - (answers)Cycle, quarterly,
,3|Page
weekly
Main feed pump is classified as what type of pump? - (answers)Multi stage
High speed
Turbine driven
How long must the engine room/fire room operating log be kept for? - (answers)2
years
Main feed pumps are fitted with what two types of governors? - (answers)Speed
limiting
Constant speed
the number of revolutions to major speed change is entered in what column? -
(answers)3
Entries for astern pitch are preceded by what level? - (answers)B
What is the max allowable super heater outlet temp during transition periods of
15mins - 1 hour on a 1200 psig D type boiler? - (answers)1020 degrees
What is the first action taken, when you are experiencing difficulty in maintaining
boiler water level on an automated ship? - (answers)Shift boiler feed water
control to remote/manual
In the engineering bell book, what does I mean? - (answers)Ahead standard speed
In the engineering bell book, what does III mean? - (answers)Ahead flank speed
In the engineering bell book, what does B 1/3 mean? - (answers)Back 1/3 speed
In the engineering bell book, what does Z mean? - (answers)Stop
In the engineering bell book, what does BF mean? - (answers)Back full speed
In the engineering bell book, what does BEM mean? - (answers)Back emergency
speed
, 4|Page
In the engineering bell book, what does II mean? - (answers)Ahead full speed
When order received is recorded as RPM in what column? - (answers)2
What QA for is used for testing and inspection? - (answers)QA form 17
Boiler high water alarm is set to what parameter - (answers)+7 inches
During a white smoke casualty to a boiler, what must never be adjusted? -
(answers)Fuel oil header pressure
What temp is lube oil maintained on an operating main engine? - (answers)120-
130 degrees
A ruptured feed water control valve diaphragm will have what adverse effect on
boiler water level? - (answers)Water level increase
Valve will fail open
Maximum steady state superheater outlet temp on a D type 1200 psig boiler? -
(answers)1000 degrees
During loss of vacuum casualty on a main condenser, what action must be taken
when vacuum decreases to 15"? - (answers)Main engine must be stopped and
casualty procedure IAW EOCC
Temporary distortion of SSTG rotor numerous start/stop episodes is known as
what? - (answers)Bowed rotor
Whenever a propulsion turbine casing joint is opened for any reason, a final
contact check is required by taking a red and blue check of the made up joint,
what is the required contact for non pumping groove joints? - (answers)75%
contact over entire joint, 1/4" minimum continuous contact inside the groove and
across each pressure section
What is the function of staff packing on SSTG - (answers)Prevent leakage of stem
from ingress of air into turbines
