Auxiliary Machinery. Test 79

What is the usual pressure adjustment method on boiler safety valves?

In a refrigeration system the method of reducing the capacity without reducing the compressor speed is called:

The engine room high level bilge alarm keeps sounding every few minutes even though the bilge is empty. What action would you take ?

Check the function of the level switch and the printed circuit board for this alarm group.
Disconnect the alarm and see if it helps.
Start the bilge pump.
Change the setting on the alarm printed circuit board.

What is the most dangerous effect of scale build up in the boiler water space?

How is a vacuum created in the fresh water generator?

What is the purpose of air release valves on boiler shell?

Which of the following would indicate the steam trap in the drawing was operating correctly?

A boiler burner fails each time it is started with failure indicated as 'flame failure'. Indicate the most likely reason.

Review Answers