Certification Assistance for Marine Engineers

Canadian Second Class ME 
Engineering Knowledge - Steam

In Canada, Transport Canada administers the Marine Engineering examination process; visit the Training Page for details on the process. The actual exam consist of nine (9) questions randomly drawn from a question bank of the various subject. Six (only) must be answered in a 3.5hrs time frame. The exam questions are similar to these, presented below, and are drawn heavily from similar question in the Reed's Marine Engineering series of books. 
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Transport Canada has ask us to advise users of this webpage to keep in mind that these questions are not the exact questions found in their exams. Martin's Marine Engineering Page - www.dieselduck.net is not affiliated with Transport Canada and these questions have been gathered from various sources.

Attempt any SIX (6) questions
Time = 3.5 hrs

These questions were forwarded by S.A. who stated that he took the exam in late 2003 and these are some of the questions on it...

1) If excessive weardown takes place at the bearings of a high pressure reaction type turbine, what damage is liable to occur? How is the weardown measured?

2) Describe the action and principle of a uiflow type steam reciprocating engine. Why is it more economical than the usual triple expansion steam engine? Editor's Note - Are you kiddin me???

3) What is Steam Lap, Exhaust Lap, Lead and how are these measured? What is the advantage of giving a valve Steam Lap? Given Lap, Lead and valve travel, how is the angle of advance arrived at?

4) What advantages are gained by the use of independent air pumps and independent circulating pumps? Describe an air pump which you are familiar.


Test A

1) In conjunction with 2 or 3 coal-fired boilers, discuss the differences, advantages and disadvantages of forced draught and natural draught.

2) Explain how the steam is used in a triple expansion engine, compared to a single cylinder engine. Is this the same way steam is used in a turbine?

3) Sketch and describe a steam trap. Why are they used? How do they work? Where are they used?

4) Sketch and describe a 2-stage air ejector in conjunction with a regenerative condenser and a closed feed system.

5) Describe the construction of a saturated steam drum for a water tube boiler. Name the tests carried out on the various materials and at what stage in the process they are carried out.

6) Sketch and describe a high-lift safety v/v. List the various components and the material they would be made of.

7) Describe the operation of the "STEPHENSON" link motion used on triple expansion engines.

Test B

1) How is vacuum maintained in a modern condenser? What vacuum would you carry in a reciprocating engine and a turbine? Why?

2) Describe a water tube boiler, make a sketch of the longitudinal section of the steam drum.

3) Sketch a L/O system for a single screw turbo-electric ship.

4) Sketch and describe a forced draught system for a water tube boiler. Give pressures and temperatures.

5) Name dissolved solids in salt water. What effects do they have in the boiler and what remedies are taken for these effects?

6) Survey an old Scotch boiler, what defects would you expect to find?

7) Describe an evaporator, how would you run it to get maximum efficiency? How would you estimate the cost in fuel?

8) What governs the area of a safety v/v? How can you turn the v/v on its seat? Why is the boiler pressure lower when v/v re-seats?

9) How would you check v/v seating on a large HP engine having in-side steam piston v/v?

Test C

1) Sketch and describe a reducing station. How does it work and state any differences in the steam after being reduced.

2) Sketch and describe a single reduction gear and pinion. How would bearings be checked for wear?

3) State how you would get main engines ready for inspections on the last ship you were on. State type of engine.

4) Some steam engines have poppet v/v�s, sketch and explain how they work. (RED BOOK pg. 66)

5) Sketch a steam card you would expect to get from an HP cylinder. From copies of this sketch show in dotted lines, cards you would expect from a) Early lead and expansion
b) Late lead and expansion
c) Late exhaust opening

6) Explain why there is poor water circulation in a smoke tube boiler. What means are they�re of starting up circulation in
a) 3 boiler ship, starting from cold (pg. 90 Kandy)
b) A boiler already working (use hydrokineter)

7) Sketch and describe a feed water heater. What is its purpose and show piping and v/vs.

8) Sketch and describe a main steam stop v/v that will be used in a steam line hooked to other water tube boilers.

9) Sketch and describe an engine used for a shaft-reversing engine.

Test D

1) Describe a safety v/v for a high-pressure boiler. What procedure is carried out for say 6 boilers is parallel?

2) Describe the action-reaction Impulse type turbine. What are its advantages to other types?

3) Describe the heat required for a feed water heater of a high- pressure boiler and give readings.

4) Describe a UNIFLOW engine.

5) Sketch and describe a turbo feed p/p., what precautions are required before starting up?

6) Sketch and describe a tube and top end plate for a Scotch boiler (riveted) and show how it is attached to the boiler shell and also in the way of the longitudinal Double Butt Straps.

7) Sketch and describe the arrangement of supply air to a high- pressure boiler. Give temperatures and pressures found. What means are they�re of measuring excess air? 

Test E

1) Sketch and describe a super-heater as fitted to a water tube boiler. Indicate the path of the superheated steam and temperatures of combustion gases when they reach the super-heaters. What attention does the super-heater require?

2) Describe the procedures adopted when inspecting a set of double reduction gears and associated bearings. State the faults, which you would look for, and the causes of them.

3) What type of turbine develops the greatest amount of end thrust? Explain how this thrust is developed and how the thrust force is absorbed. Describe how clearances are altered. Illustrate with sketches.

4) Sketch and describe a soot blower suitable for a water tube boiler.

5) Sketch a turbine rotor suitable for high pressure and high temperature steam and describe its construction. Show how discs are attached to the rotor and how blades are attached to the discs.

6) Show the riveted connections for the longitudinal and circumferential joints. What factors govern calculations for same? (BOILERS?)

7) Sketch and describe an arrangement for the automatic combustion control of an oil-fired boiler.

8) What would be the effect in water tube boilers of saltwater in the fuel oil with respect to;
a) Corrosion of boiler heating surfaces
b) Deterioration of boiler refractors (RED BOOK pg. 73)
c) Formation of bonded deposits

9) What are the differences, with salient points, of the following types of turbines;
a) Pressure compounded
b) Pure impulse
c) Velocity compounded
d) Pure reaction
e) Impulse-reaction

10) Sketch and describe a forced circulation boiler. Explain how the flow is controlled. Compare the forced circulation method with the circulation in a normal water tube boiler

Test F

1) Explain how to slow down and reverse a turbo-electric ship.

2) Explain how to take a turbine rotor out for inspection, what to look for and how to replace it.

3) Sketch a double ported slide v/v as used in a triple expansion engine.

4) Sketch indicator cards for HP, IP & LP cylinders. Show cards for leaking pistons and valves.

5) Explain mechanical clearance and volumetric clearance for a triple expansion engine. Show how volumetric clearance can be spotted on an indicator card.

6) Sketch and describe a deaerator.

7) Show how a super-heater is fitted in a Scotch boiler. How is it mounted? What precautions are required?

8) How is salt water prepared for a Water tube boiler and a Scotch boiler? What densities are required for each.

Test G

1) Sketch a diagram showing the results of NEGATIVE EXHAUST LAP. In what type of v/v and where is it used? (pg. 55 small McGibbons)

2) Describe a type of boiler you are familiar with indicating salient points. What care, in general, is taken with water tube boilers?

3) General maintenance and management of an oil fired boiler room.

4) What is linking in and linking out of a triple expansion engine? (Red Book pg.�s 5,6,133,135)

5) Sketch and describe a distiller suitable for drinking water and feed water. What maintenance is required?

6) Sketch and describe a D.C. Heater. What are the advantages of it? Give a diagram of the controls.

7) Sketch and describe a main turbine governor. What percentage does it over-speed at? (110%?)

8) How is steam consumption found from an indicator card? Sketch a diagram. (pg 477 big McGibbons)

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Brought to you by www.dieselduck.net comments to [email protected]
Transport Canada has ask us to advise users of this webpage to keep in mind that these questions are not the exact questions found in their exams. Martin's Marine Engineering Page - www.dieselduck.net is not affiliated with Transport Canada and these questions have been gathered from various sources.