Machinist Mate Test 2023 Questions and Answers with
complete solution
What NSTM deals with propulsion and SSTG Turbines?
NSTM 231
Whats type of rotary pump is frequently used as a lubricanting pump on pumpe
and other aux equipment?
Simple gear pimp
What is the normal length of a tapered plug?
3"
What is installed on a non-condensing turbone to protect turbine casing from
excessive pressure?
Combination exhaust relief valve 2-3 psi above exhaust line pressure
On an SSTG, what protects turbine casing from excessive pressure?
Back pressure trip
When starting an SSTG, what is a minimum lube oil temp?
60 degrees
What are the four sections of a PQS?
Fundamentals, systems, watchstations, qual card
What is the number for a PMS feedback report?
4790/7B
When should oil coolers be put into operation on aux machinery?
When temp of lube oil leaving cooler is 100 degrees
DFT is designed to operate at what pressure and temp?
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?
Wearing rings
The federal water pollution control act was amended in what year?
1970
What is the NSTM for compressed air systems?
551
What is the max allowable pressure drop across a fuel oil duplex strainer when
online?
3%
What is the NSTM for general reduction gear?
241
What is the NSTM for forced draft blowers?
554
What is the required amount of sodium nitrate used for a sodium nitrate wet lay
up?
10lbs per 1,000 gallons of feed water
What is the NSTM for insulation and lagging?
635
What is QA chapter 11?
,QA forms and instructions
What is QA chapter 12?
Submarine preservation
What is QA chapter 13?
Wire removal and replacement
What is QA chapter 10?
Quality assurance records
What is QA chapter 9?
Audits, surveillance, evaluations and assesments
What is QA chapter 3?
PQS and training
What is QA chapter 2?
Quality maintenance process
What is QA chapter 4?
Welder, brazer, and NDT qualifications
What is QA chapter 5?
In process control
When is the current ships maintenance project verified and updated?
Monthly
PMS schedules are categorized in what manner?
Cycle, quarterly, weekly
Main feed pump is classified as what type of pump?
Multi stage
High speed
Turbine driven
How long must the engine room/fire room operating log be kept for?
2 years
Main feed pumps are fitted with what two types of governors?
Speed limiting
Constant speed
the number of revolutions to major speed change is entered in what column?
3
Entries for astern pitch are preceded by what level?
B
What is the max allowable super heater outlet temp during transition periods of
15mins - 1 hour on a 1200 psig D type boiler?
1020 degrees
What is the first action taken, when you are experiencing difficulty in maintaining
boiler water level on an automated ship?
Shift boiler feed water control to remote/manual
In the engineering bell book, what does I mean?
Ahead standard speed
In the engineering bell book, what does III mean?
Ahead flank speed
In the engineering bell book, what does B 1/3 mean?
Back 1/3 speed
, In the engineering bell book, what does Z mean?
Stop
In the engineering bell book, what does BF mean?
Back full speed
In the engineering bell book, what does BEM mean?
Back emergency speed
In the engineering bell book, what does II mean?
Ahead full speed
When order received is recorded as RPM in what column?
2
What QA for is used for testing and inspection?
QA form 17
Boiler high water alarm is set to what parameter
+7 inches
During a white smoke casualty to a boiler, what must never be adjusted?
Fuel oil header pressure
What temp is lube oil maintained on an operating main engine?
120-130 degrees
A ruptured feed water control valve diaphragm will have what adverse effect on
boiler water level?
Water level increase
Valve will fail open
Maximum steady state superheater outlet temp on a D type 1200 psig boiler?
1000 degrees
During loss of vacuum casualty on a main condenser, what action must be taken
when vacuum decreases to 15"?
Main engine must be stopped and casualty procedure IAW EOCC
Temporary distortion of SSTG rotor numerous start/stop episodes is known as
what?
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?
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
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?
24 hours
Main engine turbine bearings are measured for wear at what normal interval?
Annually
Lube oil cooler should be bypassed on operating aux turbine until discharge oil
temp reaches what temp?
100 degrees
complete solution
What NSTM deals with propulsion and SSTG Turbines?
NSTM 231
Whats type of rotary pump is frequently used as a lubricanting pump on pumpe
and other aux equipment?
Simple gear pimp
What is the normal length of a tapered plug?
3"
What is installed on a non-condensing turbone to protect turbine casing from
excessive pressure?
Combination exhaust relief valve 2-3 psi above exhaust line pressure
On an SSTG, what protects turbine casing from excessive pressure?
Back pressure trip
When starting an SSTG, what is a minimum lube oil temp?
60 degrees
What are the four sections of a PQS?
Fundamentals, systems, watchstations, qual card
What is the number for a PMS feedback report?
4790/7B
When should oil coolers be put into operation on aux machinery?
When temp of lube oil leaving cooler is 100 degrees
DFT is designed to operate at what pressure and temp?
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?
Wearing rings
The federal water pollution control act was amended in what year?
1970
What is the NSTM for compressed air systems?
551
What is the max allowable pressure drop across a fuel oil duplex strainer when
online?
3%
What is the NSTM for general reduction gear?
241
What is the NSTM for forced draft blowers?
554
What is the required amount of sodium nitrate used for a sodium nitrate wet lay
up?
10lbs per 1,000 gallons of feed water
What is the NSTM for insulation and lagging?
635
What is QA chapter 11?
,QA forms and instructions
What is QA chapter 12?
Submarine preservation
What is QA chapter 13?
Wire removal and replacement
What is QA chapter 10?
Quality assurance records
What is QA chapter 9?
Audits, surveillance, evaluations and assesments
What is QA chapter 3?
PQS and training
What is QA chapter 2?
Quality maintenance process
What is QA chapter 4?
Welder, brazer, and NDT qualifications
What is QA chapter 5?
In process control
When is the current ships maintenance project verified and updated?
Monthly
PMS schedules are categorized in what manner?
Cycle, quarterly, weekly
Main feed pump is classified as what type of pump?
Multi stage
High speed
Turbine driven
How long must the engine room/fire room operating log be kept for?
2 years
Main feed pumps are fitted with what two types of governors?
Speed limiting
Constant speed
the number of revolutions to major speed change is entered in what column?
3
Entries for astern pitch are preceded by what level?
B
What is the max allowable super heater outlet temp during transition periods of
15mins - 1 hour on a 1200 psig D type boiler?
1020 degrees
What is the first action taken, when you are experiencing difficulty in maintaining
boiler water level on an automated ship?
Shift boiler feed water control to remote/manual
In the engineering bell book, what does I mean?
Ahead standard speed
In the engineering bell book, what does III mean?
Ahead flank speed
In the engineering bell book, what does B 1/3 mean?
Back 1/3 speed
, In the engineering bell book, what does Z mean?
Stop
In the engineering bell book, what does BF mean?
Back full speed
In the engineering bell book, what does BEM mean?
Back emergency speed
In the engineering bell book, what does II mean?
Ahead full speed
When order received is recorded as RPM in what column?
2
What QA for is used for testing and inspection?
QA form 17
Boiler high water alarm is set to what parameter
+7 inches
During a white smoke casualty to a boiler, what must never be adjusted?
Fuel oil header pressure
What temp is lube oil maintained on an operating main engine?
120-130 degrees
A ruptured feed water control valve diaphragm will have what adverse effect on
boiler water level?
Water level increase
Valve will fail open
Maximum steady state superheater outlet temp on a D type 1200 psig boiler?
1000 degrees
During loss of vacuum casualty on a main condenser, what action must be taken
when vacuum decreases to 15"?
Main engine must be stopped and casualty procedure IAW EOCC
Temporary distortion of SSTG rotor numerous start/stop episodes is known as
what?
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?
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
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?
24 hours
Main engine turbine bearings are measured for wear at what normal interval?
Annually
Lube oil cooler should be bypassed on operating aux turbine until discharge oil
temp reaches what temp?
100 degrees
