DieselShip's Online Content Library

Q1. A large oil fire is slowly spreading in the ships steering gear compartment. Suggest some procedures means of extinguishing such fires. Propose a safety notice you would issue to the crew to prevent such fires.

Q3. What are the various stages of fire in the exhaust gas boiler? Discuss the factors responsible for ignition and development of ignition of soot, small soot fires and high temperature fires.

Q4. A. Sketch a simplified circuit that may be incorporated in a control panel for an array of fire detectors. (8)

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

i) Audible fire alarm circuits. (4)

ii) Identification, of zone of fire. (4)

iii) Automatic change, over from normal power supply. (4)

Q8. Sketch and describe the following detectors, explaining their mode of operation and Stating where they would be fitted in the machinery spaces:

(a) Heat Detector

(b) combustion or smoke detector.

State the regulations that govern the fixing of these detectors. (20)

--- PREVIOUSLY ASKED AS ---

2012/JAN/02 - 2013/APR/02

Q2. Sketch and describe the following detectors, explaining their mode of operation and stating where they would be fitted in the machinery spaces: A. Flash or sudden flare up fire detector; B. Combustion or smoke detector.

Q7. With reference to equipment supplied to detect and combat hold fires in dry cargo ships:

a) Describe, for a ship that carries dangerous cargo, the bridge-based detection arrangement, (10)

b) Explain how fires described in (a) above are dealt with bearing in mind that cargo quantity varies. (10)

Q4. a) CO₂ is to be released in engine room in case of fire. Briefly describe steps taken before it can be released. What means are provided to prevent inadvertent release of CO₂ in engine room? (12)

b) Briefly discuss the procedure for re-entering the engine room after the release of CO₂. (8)

--- PREVIOUSLY ASKED AS ---
2024/JUL/02

Q2. a) C02 is to be released in engine room in case of fire. Briefly describe steps taken before it can be released. (7)

b) What means are provided to prevent inadvertent release of CO₂ in engine room? (7)

c) How the number of CO₂ bottles required for a ship is calculated? (6)

Q5. a) Briefly describe the cargo hold fire detection system on a bulk carrier, and how does the system function to detect and alert the crew to the presence of a fire? (10)

b) Give reasons why fire detectors in cargo holds differ from those in machinery spaces. (5)

c) Describe how to verify that each is in working order. (5)

--- PREVIOUSLY ASKED AS ---

2018/JAN/02

Q2. (a) Give reasons why fire detectors in cargo holds differ from those in machinery spaces. (b) Describe how to verify that each is in working order.

Q5. a) List the precautions that must be taken before releasing CO₂ into the engine room in the event of a fire. Why is it critical to ensure these steps are followed to safeguard crew and equipment? (7)

b) Describe the actions that should be taken immediately after CO₂ release to manage the fire and prevent re-ignition. (6)

c) Explain the factors that determine the quality of CO₂ required for effective fire suppression in ship’s engine room. Outline the formula and method used to calculate the number of CO₂ bottles needed on board. (7)

Q9. With reference to an automatic water sprinkler, fire detecting alarm and extinguishing system for accommodation spaces:

a) Sketch a typical system. (4)

b) Describe the operation of this system. (4)

c) State the sources of water available. (2)

d) Describe the sprinkler head and its operation. (3)

e) State how the temperature rating of the sprinkler head is determined. (3)

Q8. (a) Draw and explain a fixed Foam fire fighting system. (12)

(b) What is the proportion ratio of both high expansion and low expansion Foam fire fighting system? (4)

(c) What periodic test are carried out to ensure the readiness of the fixed foam fire fighting system? (4)

Q4. Explain the cargo hold fire detection system used on ships. Discuss the maintenance procedures for this system and outline the steps taken when a fire is detected in the cargo hold. (20)

Q4. (a) Sketch a line diagram of a mechanical low expansion foam fixed firefighting system suitable for machinery spaces.

(b) Describe the operation of the system sketched.

(c) Explain how a mixture of foam making compound and sea water are converted into foam.