MACHINIST MATE EXAM, PRACTICE EXAM
AND STUDY GUIDE NEWEST 2024 ALL IN ONE
DOCUMENT 500 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+.
What is the purpose of the gland dealing system? - ANSWER>>> It
prevent steam from leaking out of the main engine and from air
entering
How are flanges installed in a non ferrous system? - ANSWER>>>
Brazing
How often are fuel tanks emptied to reduce heavy sludge deposits? -
ANSWER>>> Every 12 months
What lubricated corrugated ribbon packing? - ANSWER>>> Graphite
What must be done to lube oil coolers that are online more than 24
hours? - ANSWER>>> Drain seawater side
What material are oil deflectors made from? - ANSWER>>> Aluminum
or bronze
DFT will maintain dissolved oxygen context at or below what level? -
ANSWER>>> 15 ppm
What fuel oil test uses hydrazine? - ANSWER>>> API gravity
What device is installed on main engine to prevent leakage or steam
from engine? - ANSWER>>> Labyrinth packing
If rotary pumps are operated at higher than normal speed what will
occur? - ANSWER>>> Erosion and excessive wear
,When shall safety valve gauge be placed on boiler prior to safety
settings? - ANSWER>>> When steam drum pressure is 100 to 200
psi below lower valve settings or 75% or working pressure, whichever
is higher
To obtain max effective sealing of labyrinth packing the tip width of
packing teeth should be maintained within what parameter? -
ANSWER>>> .010"
Idle line shaft bearing oil must be sampi 60 At what periodicity? -
ANSWER>>> Weekly
Transverse diametrical pitch of reduction gear - ANSWER>>> Ratio of
number of teeth to number of inches of pitch diameter
What type of reduction gear would you expect to find in aux type
shop? - ANSWER>>> Tandem articulated
Double reduction
With one or more inputs
Typical end play with cold engine is what? - ANSWER>>> .008-.014"
What type of gauge is used to measure clearance between high
pressure and low pressure turbines? - ANSWER>>> Taper gauge
Chloride is an indication of what type of contamination? -
ANSWER>>> Sea water
How are steel flanges installed in systems? - ANSWER>>> Welding
What type of corrosion is caused by shore water contamination? -
ANSWER>>> Caustic
Max silica content of shore source feed water - ANSWER>>> .20 ppm
,What is primary source of silica contamination? - ANSWER>>> Poor
quality shore feed water
Which dishwasher is fully automatic? - ANSWER>>> 3 tank machine
Max moisture content of an oil sample drown from centrifugal
compressor? - ANSWER>>> 100ppm
Main condenser is what type of heat exchanger? - ANSWER>>>
Cross flow
When stripping fuel oil tanks, system is aligned to draw off how many
gallons of fuel? - ANSWER>>> 150-300 gallons
Time limit on sodium nitrate wet lay up? - ANSWER>>> No time limit
What device is installed on main engine thrust bearing to indicate
flow? - ANSWER>>> Sight flow indicator
Boiler full power capacity will be affected if what percent of generating
tubes are plugged? - ANSWER>>> >5%
When warming up a propulsion turbine the turbine should be rotated
with steam at which interval? - ANSWER>>> 2-3 mins
Main reduction gear dehumidifier system must be checked at what
frequency for correct operation? - ANSWER>>> Daily
All boiler tubes are identified in what manner? - ANSWER>>> Tube
rows by lettering
Individual tubes in each row by numbers
SSTGs are fitted with what type of governor? - ANSWER>>>
Constant speed
What is installed on a pump shaft to prevent total replacement of shaft
due to excessive wear and scoring - ANSWER>>> Shaft sleeves
, Minimum steam atomization temp at the burner front is what? -
ANSWER>>> 370 degrees
What is the purpose of apron plates ? - ANSWER>>> To form annular
passageway for steam and water mixture from generating tubes to
separators
What are the two main parts of a reciprocating pump? - ANSWER>>>
Waters end
Steam end
Three authorized cleaning methods for removing soft deposits? -
ANSWER>>> High pressure water jet
EDTA
Power driven wire brush
How much desiccant is used for a proper dry lay up? - ANSWER>>>
16lbs for every 1000 gallons of cold water capacity
What chapter deals with pollution control? - ANSWER>>> NSTM 593
What is the min water temp used for boiler hydrostatic testing? -
ANSWER>>> 70
How is the operation of a bellows type steam trap controlled? -
ANSWER>>> Expansion of the vapor of volotize liquid which is
enclosed in the bellows
What is the cooling source for inline de super heater? - ANSWER>>>
Feedwater
Automatic unloading valves are installed to exhaust to what major
component? - ANSWER>>> Main and aux condensers
On spring loaded reducing valve what determines position of aux
valve? - ANSWER>>> Position of controlling diaphragm
AND STUDY GUIDE NEWEST 2024 ALL IN ONE
DOCUMENT 500 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+.
What is the purpose of the gland dealing system? - ANSWER>>> It
prevent steam from leaking out of the main engine and from air
entering
How are flanges installed in a non ferrous system? - ANSWER>>>
Brazing
How often are fuel tanks emptied to reduce heavy sludge deposits? -
ANSWER>>> Every 12 months
What lubricated corrugated ribbon packing? - ANSWER>>> Graphite
What must be done to lube oil coolers that are online more than 24
hours? - ANSWER>>> Drain seawater side
What material are oil deflectors made from? - ANSWER>>> Aluminum
or bronze
DFT will maintain dissolved oxygen context at or below what level? -
ANSWER>>> 15 ppm
What fuel oil test uses hydrazine? - ANSWER>>> API gravity
What device is installed on main engine to prevent leakage or steam
from engine? - ANSWER>>> Labyrinth packing
If rotary pumps are operated at higher than normal speed what will
occur? - ANSWER>>> Erosion and excessive wear
,When shall safety valve gauge be placed on boiler prior to safety
settings? - ANSWER>>> When steam drum pressure is 100 to 200
psi below lower valve settings or 75% or working pressure, whichever
is higher
To obtain max effective sealing of labyrinth packing the tip width of
packing teeth should be maintained within what parameter? -
ANSWER>>> .010"
Idle line shaft bearing oil must be sampi 60 At what periodicity? -
ANSWER>>> Weekly
Transverse diametrical pitch of reduction gear - ANSWER>>> Ratio of
number of teeth to number of inches of pitch diameter
What type of reduction gear would you expect to find in aux type
shop? - ANSWER>>> Tandem articulated
Double reduction
With one or more inputs
Typical end play with cold engine is what? - ANSWER>>> .008-.014"
What type of gauge is used to measure clearance between high
pressure and low pressure turbines? - ANSWER>>> Taper gauge
Chloride is an indication of what type of contamination? -
ANSWER>>> Sea water
How are steel flanges installed in systems? - ANSWER>>> Welding
What type of corrosion is caused by shore water contamination? -
ANSWER>>> Caustic
Max silica content of shore source feed water - ANSWER>>> .20 ppm
,What is primary source of silica contamination? - ANSWER>>> Poor
quality shore feed water
Which dishwasher is fully automatic? - ANSWER>>> 3 tank machine
Max moisture content of an oil sample drown from centrifugal
compressor? - ANSWER>>> 100ppm
Main condenser is what type of heat exchanger? - ANSWER>>>
Cross flow
When stripping fuel oil tanks, system is aligned to draw off how many
gallons of fuel? - ANSWER>>> 150-300 gallons
Time limit on sodium nitrate wet lay up? - ANSWER>>> No time limit
What device is installed on main engine thrust bearing to indicate
flow? - ANSWER>>> Sight flow indicator
Boiler full power capacity will be affected if what percent of generating
tubes are plugged? - ANSWER>>> >5%
When warming up a propulsion turbine the turbine should be rotated
with steam at which interval? - ANSWER>>> 2-3 mins
Main reduction gear dehumidifier system must be checked at what
frequency for correct operation? - ANSWER>>> Daily
All boiler tubes are identified in what manner? - ANSWER>>> Tube
rows by lettering
Individual tubes in each row by numbers
SSTGs are fitted with what type of governor? - ANSWER>>>
Constant speed
What is installed on a pump shaft to prevent total replacement of shaft
due to excessive wear and scoring - ANSWER>>> Shaft sleeves
, Minimum steam atomization temp at the burner front is what? -
ANSWER>>> 370 degrees
What is the purpose of apron plates ? - ANSWER>>> To form annular
passageway for steam and water mixture from generating tubes to
separators
What are the two main parts of a reciprocating pump? - ANSWER>>>
Waters end
Steam end
Three authorized cleaning methods for removing soft deposits? -
ANSWER>>> High pressure water jet
EDTA
Power driven wire brush
How much desiccant is used for a proper dry lay up? - ANSWER>>>
16lbs for every 1000 gallons of cold water capacity
What chapter deals with pollution control? - ANSWER>>> NSTM 593
What is the min water temp used for boiler hydrostatic testing? -
ANSWER>>> 70
How is the operation of a bellows type steam trap controlled? -
ANSWER>>> Expansion of the vapor of volotize liquid which is
enclosed in the bellows
What is the cooling source for inline de super heater? - ANSWER>>>
Feedwater
Automatic unloading valves are installed to exhaust to what major
component? - ANSWER>>> Main and aux condensers
On spring loaded reducing valve what determines position of aux
valve? - ANSWER>>> Position of controlling diaphragm
