|
It is recommended that a two-hour class of lecture and discussion be held each day. During some other part of the day a conducted inspection of the equipment discussed should be made. Each man should be required to keep a notebook in which to make notes and sketches during the course. These notebooks should be inspected each week when the quizzes are marked.
OUTLINE OF COURSE
First Week
1st day-General outline of course-explanation of steam cycle.
2d day-Arrangement of machinery, manufacturer and type, speeds, location, etc.
3d day-Condensate system-Construction and operation of main condenser, condensate pumps, main air ejector and deaerating feed tank.
4th day-Piping arrangement of condensate system-condensate vents, drains and recirculating.
5th day-Feed system-operation and construction of main feed booster pumps, main feed pumps, and Foster pressure regulating governor.
6th day-Quiz.
Second Week
1st day-Review of quiz. Feed booster pump suction and discharge piping, main feed discharge piping.
2d day-Make-up and excess-feed system, emergency feed pump suctions and discharge, Bailey feed water level regulator.
3d day-Boilers-superheated and saturated sides,
economizer and general construction.
4th day-Blowdown lines, safety valves, soot blowers.
5th day-Fuel oil registers and burners; forced draft blowers.
6th day-Quiz.
Third Week
1st day-Review of quiz-Main steam piping.
|
|
2d day-Turbines-construction and layout, throttle valves, crossover valve.
3d day-Gland sealing system, reduction gears and cruising turbine disconnect gear.
4th day-Lubricating oil pumps and controls. Lubricating oil supply and drain piping.
5th day-Lubricating oil settling and purifying system, auxiliary steam system.
6th day-Quiz.
Fourth Week
1st day-Review of quiz; Fuel oil service system.
2d day-Fuel oil transfer system, and fuel oil tank ballast and drain system.
3d day-Ship's service generator and auxiliary plant, low pressure drain tank and H.P., L.P. and fuel oil heater drains.
4th day-Swartwout valve; distilling plant.
5th day-Operation-Plant line-up, divided and parallel. Lighting off and putting boiler on line. Warming up and getting underway; securing.
6th day-General review and discussion.
Quiz-First Week
I. What types are the following steam driven pumps and what mechanisms drive them:
1. Fire-and-bilge pump
2. Fuel oil service pump
3. Lubricating oil service pump.
4. Main feed booster pump
5. Emergency feed pump
6. Main feed pump?
|
II. Which of the above pumps are controlled by a constant pressure pump governor?
III. Roughly sketch a first stage air ejector nozzle and explain its operation.
IV. What is the three-fold purpose of the deaerating feed tank?
V. Make a rough sketch of the loop seal. Explain its purpose and describe its operation.
VI Make a sketch (in section) of the main feed booster pump. Indicate the location of the wearing rings (suction and discharge) and vent connections, and show by arrows the flow of water through the pump.
|
|
Alternate Quiz-First Week
I. A. What types are the following pumps
1. Main feed pump.
2. Lubricating oil pump.
3. Main condensate pump
4. Fuel oil service pump
5. Emergency feed pump
|
B. Which of the above are controlled by constant pressure pump governors?
II. Sketch a first stage air ejector nozzle and explain its operation.
III. A. What is the function of the micrometer valve in the Cochrane deaerating feed tank?
B. What is the three-fold purpose of the deaerating feed tank?
IV. Sketch the main loop seal. What is its purpose and describe its operation?
V. A. What is a wearing ring? What purpose does it serve?
B. The speed of the steam main condensate and the steam main feed booster pumps is controlled by what?
C. Condensate from the main condenser is pumped through the main air ejector to serve what purpose?
Quiz-Second Week
I. Why it is desirable to recirculate water from the main feed booster pump discharge back through the deaerating tank for a period of time before feeding to the boilers from the tank?
II. Make a list of details to check before turning over a main feed pump.
III. A. What is an economizer? How does it operate?
B. Why is it necessary to keep a very close watch on the boiler water level when feeding with the Bailey feed water level regulator?
IV. Sketch a boiler in outline, indicating location of saturated furnace, saturated tube nest, superheater furnace, superheater, economizer, all drums and burners.
V. A. No. 1 emergency feed pump can take suction from where (list all points.)
B. No. 1 emergency feed pump can discharge to forward feed tanks only when taking suction from where?
VI. A. What is meant by the "blowback" of a safety valve?
|
|
B. What two purposes does the drum pilot valve serve?
C. Why is it necessary for the superheater safety valve to lift before or at the same time as the first drum safety valve?
VII. Sketch the rear view and a cross-section of a fuel oil burner sprayer plate.
Alternate Quiz-Second Week
1. Make a list of details to check before turning over a main feed pump.
II. Sketch a boiler in outline, indicating saturated furnace, saturated tube nest, superheater furnace, superheater, all drums, economizer, and location of burners.
III. A. What is an economizer? How does it operate?
B. Why is it necessary to keep a very close watch on the boiler water level when feeding with the Bailey Feed Water Level Regulator?
IV. A. No. 1 emergency feed pump can take suction from where (list all points) ?
B. No. 1 emergency feed pump can discharge to forward feed tanks only when taking suction front where?
V. A. What is meant by the "blow back" of a safety valve?
B. What two purposes does the drum pilot valve serve?
C. Sketch the rear view and a cross-section of a fuel oil burner sprayer plate.
D. List the lifting and reseating pressures of all the safety valves.
Quiz-Third Week
For Ships with 35 p.s.i. Oil system
I. Make a line sketch of the main steam piping, showing the location of all valves.
II. A. List the five steam admission valves of the high pressure turbine, showing into which stage each opens.
B. Sketch the crossover valve. State its purpose and describe its operation.
III. Sketch the gland sealing steam system, indicating all valves. Show which valves are automatic and which hand operated.
IV. What automatic devices control the operation of the lubricating oil service pumps? Describe how the pumps interlock stating pressures involved.
|
|
V. A. Which main bearing needle valves can be fully closed?
B. What two features cause a drop in pressure in the lubricating oil supply system from 35 p.s.i. at, the pumps to 10 p.s.i. at the needle valves?
C. How can an empty lube. oil sump tank be tilled when striking down oil from topside?
D. The lubricating oil cross-connection between the two purifier systems must be kept locked to insure against what?
Quiz-Third Week
For Ships With 10 p.s.i. Lubricating Oil System
I. Make a line sketch of the main steam piping, showing location of all valves.
II. A. List the five steam admission valves of the high pressure turbine, showing into which stage each opens.
B. Sketch the cross-over valve. State its purpose and describe its operation.
|
|
III. Sketch the gland sealing steam system, showing all valves. Give a summary of its operation, stating at about what speeds the various valves are opened.
IV. A. Describe two methods of shifting from time cruising combination of the main turbines to the high-pressure combination.
B. What automatic devices control the operation of the main lubricating oil pumps? Describe how the pumps interlock, stating pressures involved.
V. A. What effect does fully closing a main bearing needle valve have on the bearing?
B. What two precautions must be taken to protect the turbine rotor before discharging oil to the turbine bearings?
C. How can an empty lubricating oil sump tank be filled when striking down oil from topside?
D. The lubricating oil cross-connection between the two purifier systems must be kept locked to guard against what?
|
