148
THE HONGKONG GOVERNMENT GAZETTE, MARCH 11, 1910.
Describe any well-known ash ejector.
266.
267.
Describe any well-known independent feed pumps.
268.
Are independent feed pumps automatic in their action? Explain the action.
269.
What advantage, if any, have independent feed pumps over feed pumps worked by the main engines?
270.
To about what temperature is the feed water raised by passing through a feed-heater ?
271.
What fittings are usually placed on a feed-heater? Why are they necessary
272.
Describe the construction of a feed-filter, enumerating its valves and cocks.
273.
How can the filter be cleaned? What ingredients are generally removed when cleaning takes place?
274.
What is the intercepting material in a filter made of? How is it fitted?
275.
Describe an evaporator, and mention the type.
276.
What fittings are necessary with evaporators?
277.
How is the brine got rid of in an evaporator ?
278.
How may the evaporator coils be cleaned?
279.
What is a dynamo? Describe its various parts. For what is it used ?
280.
In what respect does an electric motor differ from a dynamo? Where are electric motors sometimes used on board ship?
281.
Describe a system of electric lighting employed on board ship.
282.
How is the position of a fault in the electric circuit discovered ?
283.
What is "sparking", and may it under some circumstances (naming them) be a danger?
281.
What is "short-circuiting", and to what evil may it give rise?
285.
What means are employed to prevent any part of the circuit becoming overheated?
Describe the features of an arc lamp.
286.
287.
Describe the construction of a glow-lamp.
288.
What is the usual candle-power of the small glow-lamps in general use on board ship?
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