MACHINIST MATE EXAM LATEST EXAM QUESTIONS
AND CORRECT ANSWERS || GRADED A+) |
PROFESSOR VERIFIED | LATEST VERSION 2025
Whats type of rotary pump is frequently used as a lubricanting pump on pumpe and
other aux equipment? -CORRECT ANSWER Simple gear pimp
What NSTM deals with propulsion and SSTG Turbines? -CORRECT ANSWER
NSTM 231
What is the normal length of a tapered plug? -CORRECT ANSWER 3"
What is installed on a non-condensing turbone to protect turbine casing from excessive
pressure? -CORRECT ANSWER Combination exhaust relief valve 2-3 psi above
exhaust line pressure
On an SSTG, what protects turbine casing from excessive pressure? -CORRECT
ANSWER Back pressure trip
When starting an SSTG, what is a minimum lube oil temp? -CORRECT ANSWER 60
degrees
What are the four sections of a PQS? -CORRECT ANSWER Fundamentals, systems,
watchstations, qual card
What is the number for a PMS feedback report? -CORRECT ANSWER 4790/7B
When should oil coolers be put into operation on aux machinery? -CORRECT
ANSWER When temp of lube oil leaving cooler is 100 degrees
DFT is designed to operate at what pressure and temp? -CORRECT ANSWER 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? -CORRECT ANSWER Wearing rings
The federal water pollution control act was amended in what year? -CORRECT
ANSWER 1970
,What is the NSTM for compressed air systems? -CORRECT ANSWER 551
What is the max allowable pressure drop across a fuel oil duplex strainer when online? -
CORRECT ANSWER 3%
What is the NSTM for general reduction gear? -CORRECT ANSWER 241
What is the NSTM for forced draft blowers? -CORRECT ANSWER 554
What is the required amount of sodium nitrate used for a sodium nitrate wet lay up? -
CORRECT ANSWER 10lbs per 1,000 gallons of feed water
What is the NSTM for insulation and lagging? -CORRECT ANSWER 635
What is QA chapter 11? -CORRECT ANSWER QA forms and instructions
What is QA chapter 12? -CORRECT ANSWER Submarine preservation
What is QA chapter 13? -CORRECT ANSWER Wire removal and replacement
What is QA chapter 10? -CORRECT ANSWER Quality assurance records
What is QA chapter 9? -CORRECT ANSWER Audits, surveillance, evaluations and
assesments
What is QA chapter 3? -CORRECT ANSWER PQS and training
What is QA chapter 2? -CORRECT ANSWER Quality maintenance process
What is QA chapter 4? -CORRECT ANSWER Welder, brazer, and NDT qualifications
What is QA chapter 5? -CORRECT ANSWER In process control
When is the current ships maintenance project verified and updated? -CORRECT
ANSWER Monthly
PMS schedules are categorized in what manner? -CORRECT ANSWER Cycle,
quarterly, weekly
Main feed pump is classified as what type of pump? -CORRECT ANSWER Multi
stage
High speed
,Turbine driven
How long must the engine room/fire room operating log be kept for? -CORRECT
ANSWER 2 years
Main feed pumps are fitted with what two types of governors? -CORRECT ANSWER
Speed limiting
Constant speed
the number of revolutions to major speed change is entered in what column? -
CORRECT ANSWER 3
Entries for astern pitch are preceded by what level? -CORRECT ANSWER B
What is the max allowable super heater outlet temp during transition periods of 15mins -
1 hour on a 1200 psig D type boiler? -CORRECT ANSWER 1020 degrees
What is the first action taken, when you are experiencing difficulty in maintaining boiler
water level on an automated ship? -CORRECT ANSWER Shift boiler feed water
control to remote/manual
In the engineering bell book, what does I mean? -CORRECT ANSWER Ahead
standard speed
In the engineering bell book, what does III mean? -CORRECT ANSWER Ahead flank
speed
In the engineering bell book, what does B 1/3 mean? -CORRECT ANSWER Back 1/3
speed
In the engineering bell book, what does Z mean? -CORRECT ANSWER Stop
In the engineering bell book, what does BF mean? -CORRECT ANSWER Back full
speed
In the engineering bell book, what does BEM mean? -CORRECT ANSWER Back
emergency speed
In the engineering bell book, what does II mean? -CORRECT ANSWER Ahead full
speed
When order received is recorded as RPM in what column? -CORRECT ANSWER 2
, What QA for is used for testing and inspection? -CORRECT ANSWER QA form 17
Boiler high water alarm is set to what parameter -CORRECT ANSWER +7 inches
During a white smoke casualty to a boiler, what must never be adjusted? -CORRECT
ANSWER Fuel oil header pressure
What temp is lube oil maintained on an operating main engine? -CORRECT
ANSWER 120-130 degrees
A ruptured feed water control valve diaphragm will have what adverse effect on boiler
water level? -CORRECT ANSWER Water level increase
Valve will fail open
Maximum steady state superheater outlet temp on a D type 1200 psig boiler? -
CORRECT ANSWER 1000 degrees
During loss of vacuum casualty on a main condenser, what action must be taken when
vacuum decreases to 15"? -CORRECT ANSWER Main engine must be stopped and
casualty procedure IAW EOCC
Temporary distortion of SSTG rotor numerous start/stop episodes is known as what? -
CORRECT ANSWER 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? -CORRECT ANSWER 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 -CORRECT ANSWER Prevent leakage
of stem from ingress of air into turbines
Prior to conducting thrust measurements on a main engine, turbine must be at ambient
temp with throttles shit for how long? -CORRECT ANSWER 24 hours
Main engine turbine bearings are measured for wear at what normal interval? -
CORRECT ANSWER Annually
Lube oil cooler should be bypassed on operating aux turbine until discharge oil temp
reaches what temp? -CORRECT ANSWER 100 degrees
AND CORRECT ANSWERS || GRADED A+) |
PROFESSOR VERIFIED | LATEST VERSION 2025
Whats type of rotary pump is frequently used as a lubricanting pump on pumpe and
other aux equipment? -CORRECT ANSWER Simple gear pimp
What NSTM deals with propulsion and SSTG Turbines? -CORRECT ANSWER
NSTM 231
What is the normal length of a tapered plug? -CORRECT ANSWER 3"
What is installed on a non-condensing turbone to protect turbine casing from excessive
pressure? -CORRECT ANSWER Combination exhaust relief valve 2-3 psi above
exhaust line pressure
On an SSTG, what protects turbine casing from excessive pressure? -CORRECT
ANSWER Back pressure trip
When starting an SSTG, what is a minimum lube oil temp? -CORRECT ANSWER 60
degrees
What are the four sections of a PQS? -CORRECT ANSWER Fundamentals, systems,
watchstations, qual card
What is the number for a PMS feedback report? -CORRECT ANSWER 4790/7B
When should oil coolers be put into operation on aux machinery? -CORRECT
ANSWER When temp of lube oil leaving cooler is 100 degrees
DFT is designed to operate at what pressure and temp? -CORRECT ANSWER 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? -CORRECT ANSWER Wearing rings
The federal water pollution control act was amended in what year? -CORRECT
ANSWER 1970
,What is the NSTM for compressed air systems? -CORRECT ANSWER 551
What is the max allowable pressure drop across a fuel oil duplex strainer when online? -
CORRECT ANSWER 3%
What is the NSTM for general reduction gear? -CORRECT ANSWER 241
What is the NSTM for forced draft blowers? -CORRECT ANSWER 554
What is the required amount of sodium nitrate used for a sodium nitrate wet lay up? -
CORRECT ANSWER 10lbs per 1,000 gallons of feed water
What is the NSTM for insulation and lagging? -CORRECT ANSWER 635
What is QA chapter 11? -CORRECT ANSWER QA forms and instructions
What is QA chapter 12? -CORRECT ANSWER Submarine preservation
What is QA chapter 13? -CORRECT ANSWER Wire removal and replacement
What is QA chapter 10? -CORRECT ANSWER Quality assurance records
What is QA chapter 9? -CORRECT ANSWER Audits, surveillance, evaluations and
assesments
What is QA chapter 3? -CORRECT ANSWER PQS and training
What is QA chapter 2? -CORRECT ANSWER Quality maintenance process
What is QA chapter 4? -CORRECT ANSWER Welder, brazer, and NDT qualifications
What is QA chapter 5? -CORRECT ANSWER In process control
When is the current ships maintenance project verified and updated? -CORRECT
ANSWER Monthly
PMS schedules are categorized in what manner? -CORRECT ANSWER Cycle,
quarterly, weekly
Main feed pump is classified as what type of pump? -CORRECT ANSWER Multi
stage
High speed
,Turbine driven
How long must the engine room/fire room operating log be kept for? -CORRECT
ANSWER 2 years
Main feed pumps are fitted with what two types of governors? -CORRECT ANSWER
Speed limiting
Constant speed
the number of revolutions to major speed change is entered in what column? -
CORRECT ANSWER 3
Entries for astern pitch are preceded by what level? -CORRECT ANSWER B
What is the max allowable super heater outlet temp during transition periods of 15mins -
1 hour on a 1200 psig D type boiler? -CORRECT ANSWER 1020 degrees
What is the first action taken, when you are experiencing difficulty in maintaining boiler
water level on an automated ship? -CORRECT ANSWER Shift boiler feed water
control to remote/manual
In the engineering bell book, what does I mean? -CORRECT ANSWER Ahead
standard speed
In the engineering bell book, what does III mean? -CORRECT ANSWER Ahead flank
speed
In the engineering bell book, what does B 1/3 mean? -CORRECT ANSWER Back 1/3
speed
In the engineering bell book, what does Z mean? -CORRECT ANSWER Stop
In the engineering bell book, what does BF mean? -CORRECT ANSWER Back full
speed
In the engineering bell book, what does BEM mean? -CORRECT ANSWER Back
emergency speed
In the engineering bell book, what does II mean? -CORRECT ANSWER Ahead full
speed
When order received is recorded as RPM in what column? -CORRECT ANSWER 2
, What QA for is used for testing and inspection? -CORRECT ANSWER QA form 17
Boiler high water alarm is set to what parameter -CORRECT ANSWER +7 inches
During a white smoke casualty to a boiler, what must never be adjusted? -CORRECT
ANSWER Fuel oil header pressure
What temp is lube oil maintained on an operating main engine? -CORRECT
ANSWER 120-130 degrees
A ruptured feed water control valve diaphragm will have what adverse effect on boiler
water level? -CORRECT ANSWER Water level increase
Valve will fail open
Maximum steady state superheater outlet temp on a D type 1200 psig boiler? -
CORRECT ANSWER 1000 degrees
During loss of vacuum casualty on a main condenser, what action must be taken when
vacuum decreases to 15"? -CORRECT ANSWER Main engine must be stopped and
casualty procedure IAW EOCC
Temporary distortion of SSTG rotor numerous start/stop episodes is known as what? -
CORRECT ANSWER 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? -CORRECT ANSWER 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 -CORRECT ANSWER Prevent leakage
of stem from ingress of air into turbines
Prior to conducting thrust measurements on a main engine, turbine must be at ambient
temp with throttles shit for how long? -CORRECT ANSWER 24 hours
Main engine turbine bearings are measured for wear at what normal interval? -
CORRECT ANSWER Annually
Lube oil cooler should be bypassed on operating aux turbine until discharge oil temp
reaches what temp? -CORRECT ANSWER 100 degrees
