Auxiliary Machinery. Test 15 – Online Maritime Tests

Why is it important to keep the condense PH- value in correct range?

To neutralize the acids occurring in the condensate system.
It is not important.
To prevent oxygen corrosions.
To prevent sludge depositing in the water.

For a low pressure boiler, after testing the water, You found the Chloride level to be 50 PPM, what action would You take?

Increase dosage.
Reduce dosage.
Do nothing.
Blow down the boiler and reduce dosage.

What will You do if the PH-value in the boiler water is over 11?

Decrease the dosage of chemicals.
Nothing.
Increase the dosage of chemicals.
Blow the boiler and renew water until the PH-value is normal again.

In a low pressure auxiliary boiler, if after testing the water, You found the P. alkalinity to be 50 PPM CaCO3, what action would You take?

Increase dosage.
Do nothing.
Reduce dosage.
Blow down the boiler and reduce dosage.

What will You do if the PH-value in the boiler water is under 7?

Blow the boiler and renew some water.
Increase the dosage of chemicals, and take new test of the water.
Nothing.
Decrease the dosage of chemicals, and take new test of the water.

After complete shut down of the steam plant, the boiler have been heated in accordance to correct starting up procedure, and is now firing at working pressure. You are going to open the main steam valve to the system. What will be the correct procedure for this operation?

Don't open the main valve before you have top pressure on the boiler.
Open steam valve very slowly, considering system expansion.
Open as fast as possible to get rid of water assembly in the piping system.
Open as fast as possible to heat the piping system.

What initial simple recommendation can we give to reduce oxygen in the boiler water?

Lower the feed water temperature.
Increase the boiler pressure.
Increase the 'Blow down'.
Raise the feed water temperature.

Review Answers