DieselShip's Online Content Library

Q1. With reference to alkaline batteries used on board ship.

a) Describe the operation of a battery cell and state the material used. (8)

b) Describe how the cells are mounted to form a battery. (4)

c) State the advantages and disadvantages compared with lead-acid batteries. (4)

Q5. (a) What are the hazards associated with batteries? (4)

(b) What safety precautions are to be taken while operating and maintaining the batteries including in battery room. (6)

(c) What are the safety arrangements seen in the Battery room of a ship? (6)

Q5. a) What are the hazards associated with batteries? (6)

b) What safety precautions are to be taken while operating and maintaining the batteries including in battery room. (10)

Q2. a) Distinguish between primary and secondary cells. (4)

b) Explain Internal resistance in a battery. (4)

c) What are the factors affecting internal resistance of a battery. (8)

Q1. a) Explain the working principle of an alkaline battery. (8)

b) Compare the alkaline battery with Lead-Acid battery. (8)

Q3. (a) Sketch and describe the working of a Lead-Acid battery. (12)

(b) What routine maintenance is carried out on these batteries? (4)

Q5. (a) Describe the changes which take place within a lead-acid battery during discharge and when charging is taking place (10)

(b) What are the safety features you would find in (10)

(i) Paint store

(ii) Battery room

Q3. With reference to batteries onboard:

a) Distinguish between ‘Lead acid cell’ and ‘Alkaline cell’ (6)

b) Describe how a battery of alkaline cells may be tested for its usefulness, after a long storage and if found deficient, how it can be remedied? (6)

c) Explain how the ambient temperature is taken into account when determining the condition of the battery (4)

Q9. State how safety is achieved with regard to gas emission in battery rooms where a large number of lead-acid cells are stored with reference to
a) Provision of lighting (4)
b) Ventilation if a fan is fitted (4)
c) Type of distilled water container for topping up (4)
d) Use of tools and replacement of defective batteries (4)

Q3. a) Describe an alkaline battery cell, listing the materials used in its manufacture. (6)

b) With reference to alkaline batteries used on ships, state each of the following: (10)

i) Significance of the relative density reading of the electrolyte.

ii) When the electrolyte would normally be renewed.

iii) Reasons why the voltage reading of this type of battery is not necessarily indicative of its condition.

iv) The normal temperature range and safe temperature limit of battery.

v) Effects of high and low temperature.