DieselShip's Online Content Library

Q1: Describe how the following conditions are prevented in auxiliary boilers:

A. Feed contamination by oil from heating coil drains.

B. Internal corrosion.

C. Furnace blowback.

D. Uptake fire.

Q2. Write a report to your Engineer Superintendent describing a breakdown of the main refrigerating plant for cargo or ship provision giving reasons for the breakdown, the method of repair and the action taken to prevent a recurrence.

Q4. A. During the weighment of CO2 bottles required for total flooding of Engine room, it was observed that few bottles are less than the original capacity. State the reasons for the same and checks / tests to be made prior refilling. (8)

B. State how often the CO2 bottles are required to be weighed and pressure tested. (8)

---Previously Asked As---

2022/APR/07 - 2022/JAN/05

Q5. A.  During the weighment of CO2 bottles required for total flooding of Engine room, it was observed that few bottles are less than the original capacity.  State the reasons for the same and checks / tests to be made prior refilling;

B. With reference to MSC1/Circ.1318/Rev.1, high pressure cylinders (CO2 bottles) are subjected to an internal inspection and hydrostatic test and periodic test. State the stipulated criteria for such hydrostatic test and periodic test interval of high-pressure cylinders (CO2 bottles).

Q5. During the past four months since you joined the ship as Second engineer a number of main engine exhaust valve have suffered from cracking and corrosion at the seating faces. Write a report to the Superintendent Engineer covering the following points:

A. An explanation detailing how the problem becomes evident.

B. Your action upon recognizing the extent and seriousness of the problem.

C. Your reasoned view regarding the possible causes of the problem.

D. Your recommendations to avoid future incidents.

Q6. A. Describe the events leading to a crankcase explosion.

B. State how overheating might be indicated other than by a mist detector.

C. Discuss the procedure to follow in the invent of overheating being indicated.

D. State how severity of a crankcase explosion is limited. (4X4)

Q7. Describe the procedure for overhauling a boiler safety valve and explain using sketches where necessary those parts, which require close attention. Also describe the procedure for setting of boiler safety valves. (16)

---Previously Asked As ---

2011/JAN/06 - 2011/MAR/02 - 2012/SEP/04 - 2015/OCT/06 - 2016/AUG/05 - 2017/FEB/05 - 2018/FEB/06 - 2021/AUG/03 - 2022/JAN/02 - 2022/APR/05

Q2. A). Describe the overhaul of a boiler safety valve and explain using sketches where necessary those parts which require particularly close attention;

B). Describe the setting of boiler safety valve to comply with classification society requirements.

Q7. What are the routine maintenance carried out to an a.c. motor; and- A. Explain the meaning of single phasing in a.c. machinery; B. State the dangers associated with single phasing and enumerate the protective normally fitted to counteract such dangers.

Q6. With reference to marine gearing and gearbox.

A. Why the first examination after commissioning is of special importance.

B. What part would receive the closest scrutiny and what defects might possibly be found.

C. The gearing faults that are likely to develop early in the life of the vessel.

Q3. a) Briefly explain the term metal fatigue and further explain how fatigue failure occurs. (4)

b) State the difference between high stress/low cycle and low stress/high cycle fatigue giving example of each. (4)

c) State how defects in the metal can influence the expected safe life of a component. (4)

d) State how fuel injection timing and cylinder power balance influence the possibility of fatigue cracks developing in the bedplate. (4)

---Previously Asked As---

2023/NOV/01 - 2024/OCT/02 - 2025/DEC/09

Q9. a) Explain metal fatigue and how fatigue failure occurs. (4)

b) Differentiate between high stress/low cycle and low stress/high cycle fatigue giving example of each. (4)

c) How do defects in the metal influence the expected life of a component. (4)

d) How does fuel injection timing and cylinder power balance influence the possibility of fatigue cracks developing in the bedplate. (4)