THE HONGKONG GOVERNMENT GAZETTE, MARCH 11, 1910.
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65.
An air valve is sometimes fitted to a circulating reciprocating pump; what purpose does it serve?
66.
What is the difference between a bucket air-pump, a piston air-pump, and a plunger air-pump?
67.
Are double-acting air-pumps made with plungers, with pistons, or with buckets ? Describe the construction and action of circulating pumps.
68.
What is an air-pump trunk? When is it necessary? How is it attached to the bucket? Centrifugal pumps; describe their construction, and mode of working.
69.
What class of air-pump requires both foot and delivery valves, and in what other class can either of these valves be in some cases dispensed with ?
What are marine governors ?
70.
What is their general construction? How do they act?
71.
With a surface condenser and a single acting air-pump, what is the effect of a leaky foot valve, and what is the effect of a leaky bucket when there is also a foot valve?
72.
What is its
Where is the air-pump pet cock or valve placed? How does it act? object? Does it in every case reduce the effective capacity of the pump? Is it equally applicable to double-acting pump?
73.
At what temperature is the hot well worked ? What is the effect of higher tempera- tures? What is the effect of lower temperatures ? What limits the lowness of tem- perature? Has a very low temperature any disadvantages?
71.
Bilge injection with common condensers; what are the fittings required? When is it used? What precautions are necessary in using it?
75.
When surface condensers are used what takes the place of the bilge injection? To what is the connection made? How is its valve formed? Why is this necessary?
76.
What are the practical guides to the proper amount of opening of the inlet valve for the circulating pump?
77.
Feed-pump pet cock or valve; where is it placed? What is its use? How does it act? Is it always a necessary fitting?
78.
About
What are some of the ways of fastening the ends of surface condenser tubes? what size and about what thickness are condenser tubes? What parts of a surface condenser are made of brass ?
79.
What is a blow-through valve or cock? To what is it attached? There is sometimes a valve that when opened admits steam from the slide valve casing to the exhaust port; what is its use? To which cylinder is it fitted?
80.
What are snifting valves? Why are they generally omitted now ?
81.
What connections are generally fitted to the donkey pump, and to what services can it be applied ?
82.
When the engines are stopped in harbour with steam up, what are to be shut and what are to be opened ?