DieselShip's Online Content Library

Q1: With reference to an emergency fire pump state –  A. The regulation that influence its location, capacity and power; B. How the power supply to emergency pump is ensured? C. Why a relief valve is necessary on the deck main?

Q1. With reference to automatic sprinkler system for firefighting purposes:

a) Explain, with the aid of a heat release versus time diagram, the difference between fire control and fire suppression

b) State the limitations of using glass bulb to activate sprinkler heads and suggest, with reasons, an alternative mechanism

c) The safety devices incorporated in the system

d) The parameters governing the volume of the pressure tank

Q5. a) Sketch the following detection heads and for each give a brief description of their operation.

(i) Rate of air temperature rise detector.

(ii) Flame detector,

(iii) Fixed temperature fire detector of the quartzoid bulb sprinkler type.

b) (i) What type of space is the rate of temperature rise detector used to protect? Give two spaces on board the ship where it would be fitted.

(ii) State where the fixed temperature fire detector is fitted on board the ship. Name

three places on the detector where its working temperature is indicated.

(iii) Where are flame detectors usually required to be fitted on ship?

Q4. A. Sketch a simplified circuit that may be incorporated in a control panel for an array of fire detectors.

B. Describe the following features that may be found in a control panel for fire detectors:

i) Audible fire alarm circuits;

ii) Identification, of zone of fire;

iii) Automatic change, over from normal power supply

Q8. What are the core features of the FSS Code? (International fire safety systems code). Elaborate on any one test prescribed by the Code. (20)

Q3. Outline the measures to prevent fires caused by spillage of fuel, lubricating and hydraulic oil, involving EACH of the following:

(a) Pipes, filters, valves and cocks; (2)

(b) Oil units; (2)

(c) Overflow arrangements; (2)

(d) Sounding arrangements: (2)

(e) Thermometer fittings; (2)

(f) Pumps and fittings; (2)

(g) Electric cables; (2)

(h) Exhaust turnings. (2)

Q3. Explain in detail how you would isolate one section of a water sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service. (16)

Q4. i) State the means provided for cutting off air supply to contain or extinguish fire in engine room through ventilation ducts. (4)

ii) Show an arrangement as to how remote shutting off of engine room fan dampers is possible. (8)

iii) What are funnel dampers? Why are they provided? Explain mode of operation in of engine room fire. (8)

Q7. Write short notes on following:

i) Fire hoses. (5)

ii) Nozzles for firefighting. (5)

iii) Fire hydrants. (5)

iv) International shore coupling. (5)

Q7. State why the following equipment’s require shut down during a major fire which has necessitated the evacuation of the machinery spaces:

(a) Settling and service tank valves. (4)

(b) Fuel transfer and supply pumps (4)

(c) Mechanical and natural ventilation (4)

(d) State how the fire is brought under control using the facilities available outside the machinery spaces. (8)

Q7. Petroleum vapours are a dangerous substance and when mixed with air can be ignited. With this in mind, briefly describe:

(a) An explosimeter or combustion gas indicator which can be used to check the atmosphere of a tank or pump room (10)

(b) Describe the explosimeter and its operation (10)

Q1. Explain the advantages and disadvantages of an inert gas smothering system from flue compared to an inert gas generator. Explain why inert gas generator is more advantageous.
Why it is unsuitable for use in machinery spaces. (20)