Boiler Operation and Maintenance Exam
Questions & Answers (Grade A+)
The number of pounds of steam generated per hour at the pressure
and temperature for all purposes to develop contract shaft
horsepower of the ship divided by the numbers of boilers installed
is defined as? -
correct answer ✅Boiler full power capacity
Boiler overload capacity is normally what percentage of boiler full
power capacity? -
correct answer ✅120%
What is the minimum steam drum pressure on an operating boiler?
-
correct answer ✅85% of boiler operating pressure
Do header type boilers have a water drum? -
correct answer ✅No
What is installed between inner and outer casings of the boiler to
carry the downward flow of relatively cool water drums and this
maintain the boiler circulation? -
correct answer ✅Downcomers
,Boiler Operation and Maintenance Exam
Questions & Answers (Grade A+)
Refractory expansion joints are normally what size? -
correct answer ✅1/4"
During a heavy black smoke condition the burner flame will be
what color? -
correct answer ✅Dark Orange
Minimum steam atomization temp at the burner front is what? -
correct answer ✅370 degrees F
What are the three end points a steaming boiler has? -
correct answer ✅1.) End point of circulation, 2.)Endpoint of
moisture carryover, 3.) Endpoint of combustion
Is it allowable to use shore steam for steam atomization ? -
correct answer ✅No, Due to its poor quality
Water contamination tests for fuel oil storage and service tanks and
procedures for cleaning such contaminated tasks can be found
where? -
correct answer ✅NSTM 541, petroleum and fuel oil testing
, Boiler Operation and Maintenance Exam
Questions & Answers (Grade A+)
What refractory is used for the innermost layer of the firebox
furnace? -
correct answer ✅Firebrick
When is a steam blanket lay up considered lost? -
correct answer ✅When the boiler steam pressure falls to
atmospheric pressure and cannot be reestablished
When is industrial hydrazine/morpholine lay up considered a loss? -
correct answer ✅If the hydrazine concentration falls below 10ppm
the lay-up is lost
What is used to indicate that a desiccant lay-up is within
requirements? -
correct answer ✅Humidity indicator cards
What is the periodicity of lubricating sliding feet? -
correct answer ✅Monthly in accordance with PMS
What function do the steam drum swash plates have ? -
correct answer ✅They are used to reduce the surging of water
from one end of the drum to the other as the ship moves
Questions & Answers (Grade A+)
The number of pounds of steam generated per hour at the pressure
and temperature for all purposes to develop contract shaft
horsepower of the ship divided by the numbers of boilers installed
is defined as? -
correct answer ✅Boiler full power capacity
Boiler overload capacity is normally what percentage of boiler full
power capacity? -
correct answer ✅120%
What is the minimum steam drum pressure on an operating boiler?
-
correct answer ✅85% of boiler operating pressure
Do header type boilers have a water drum? -
correct answer ✅No
What is installed between inner and outer casings of the boiler to
carry the downward flow of relatively cool water drums and this
maintain the boiler circulation? -
correct answer ✅Downcomers
,Boiler Operation and Maintenance Exam
Questions & Answers (Grade A+)
Refractory expansion joints are normally what size? -
correct answer ✅1/4"
During a heavy black smoke condition the burner flame will be
what color? -
correct answer ✅Dark Orange
Minimum steam atomization temp at the burner front is what? -
correct answer ✅370 degrees F
What are the three end points a steaming boiler has? -
correct answer ✅1.) End point of circulation, 2.)Endpoint of
moisture carryover, 3.) Endpoint of combustion
Is it allowable to use shore steam for steam atomization ? -
correct answer ✅No, Due to its poor quality
Water contamination tests for fuel oil storage and service tanks and
procedures for cleaning such contaminated tasks can be found
where? -
correct answer ✅NSTM 541, petroleum and fuel oil testing
, Boiler Operation and Maintenance Exam
Questions & Answers (Grade A+)
What refractory is used for the innermost layer of the firebox
furnace? -
correct answer ✅Firebrick
When is a steam blanket lay up considered lost? -
correct answer ✅When the boiler steam pressure falls to
atmospheric pressure and cannot be reestablished
When is industrial hydrazine/morpholine lay up considered a loss? -
correct answer ✅If the hydrazine concentration falls below 10ppm
the lay-up is lost
What is used to indicate that a desiccant lay-up is within
requirements? -
correct answer ✅Humidity indicator cards
What is the periodicity of lubricating sliding feet? -
correct answer ✅Monthly in accordance with PMS
What function do the steam drum swash plates have ? -
correct answer ✅They are used to reduce the surging of water
from one end of the drum to the other as the ship moves
