High Pressure Boiler Practical
Questions with Correct and Revised
Answers.
What type of Boiler is It - Answer scotch Marine, dry back, horizontal tube, 3-pass
How do you know that it is a fire tube - Answer no drums
how many passes - Answer 3
how do you know its 3-pass - Answer breaching is in the rear
when you first come on watch what do you do. - Answer check water level,blow down water
column, gauge glass and low water cut off, reset lwco,check log book
which would you blow down first - Answer water column, gauge glass
if you cant see the water level,what do you do. - Answer shut the water at the side of the
boiler, close all steam outlets, let boiler cool
if water level is low what do you do - Answer trouble shoot the feed water pumps and feed
water control(mcdonald miller lwco)
if water level is high what do you do - Answer shut off feed water by closing valve at boiler use
surface blow downs , shut boiler off, check water level using my tri cocks, trouble shoot the
pump and feed water control.
how do you user bottom blow downs - Answer 2 man operation, 1 to watch the gauge, 1 to
operate the vaves, check to see if the slow opening vale is closed, open the quick opening valve,
slowly open the slow opening valve, 20-30secs. close the slow opening valve,close the quick
opening valve,open the slow opening valve,close the slow opening valve.
when do you blow down the boiler, - Answer remove sludge and sediememt, or once a day,
done at low load, when first starting up.
, what is the surface blowdown for - Answer Remove scum and oil
how many low water cut offs are there - Answer 2
which LWCO completely takes out boiler and wont let it back on - Answer the one by itself on
the left side with the manual reset.
name some boiler safeties - Answer vapor stat,solenoids,LWCO,safety valves,explosion
door,high furnance pressure trip,flame detector,fuel oil fusible link, pressuretrol,proof of closure
valves,non return valve
are solenoids on the gas line safeties, - Answer yes
why are there 2 safeties on the boiler - Answer asme requires atleast 2 for heating surface
greater then 500 sq.ft.
how often do you test safety valves - Answer manually once a month, annually by raising the
pressure
how do you know the heating surface - Answer on the name plate. 1750sqft fireside
point out flame detector how does it work. - Answer the infrared light drops the resistance
across a lead sulfide cell allowing current to flow, this is picked up by the controler, if there is no
flame then there is no current
what are some oil safeties point them out, - Answer fusible link,low pressure oil switch
what are some gas safeties - Answer solenoids, high and low press gas switch, proof of
closure. Solenoids fail closed upon loss of power
what if the proof of closure valve is stuck open can the boiler light on oil. - Answer no
where is the low pressure gas cut out - Answer on the gas line before the regulator
Questions with Correct and Revised
Answers.
What type of Boiler is It - Answer scotch Marine, dry back, horizontal tube, 3-pass
How do you know that it is a fire tube - Answer no drums
how many passes - Answer 3
how do you know its 3-pass - Answer breaching is in the rear
when you first come on watch what do you do. - Answer check water level,blow down water
column, gauge glass and low water cut off, reset lwco,check log book
which would you blow down first - Answer water column, gauge glass
if you cant see the water level,what do you do. - Answer shut the water at the side of the
boiler, close all steam outlets, let boiler cool
if water level is low what do you do - Answer trouble shoot the feed water pumps and feed
water control(mcdonald miller lwco)
if water level is high what do you do - Answer shut off feed water by closing valve at boiler use
surface blow downs , shut boiler off, check water level using my tri cocks, trouble shoot the
pump and feed water control.
how do you user bottom blow downs - Answer 2 man operation, 1 to watch the gauge, 1 to
operate the vaves, check to see if the slow opening vale is closed, open the quick opening valve,
slowly open the slow opening valve, 20-30secs. close the slow opening valve,close the quick
opening valve,open the slow opening valve,close the slow opening valve.
when do you blow down the boiler, - Answer remove sludge and sediememt, or once a day,
done at low load, when first starting up.
, what is the surface blowdown for - Answer Remove scum and oil
how many low water cut offs are there - Answer 2
which LWCO completely takes out boiler and wont let it back on - Answer the one by itself on
the left side with the manual reset.
name some boiler safeties - Answer vapor stat,solenoids,LWCO,safety valves,explosion
door,high furnance pressure trip,flame detector,fuel oil fusible link, pressuretrol,proof of closure
valves,non return valve
are solenoids on the gas line safeties, - Answer yes
why are there 2 safeties on the boiler - Answer asme requires atleast 2 for heating surface
greater then 500 sq.ft.
how often do you test safety valves - Answer manually once a month, annually by raising the
pressure
how do you know the heating surface - Answer on the name plate. 1750sqft fireside
point out flame detector how does it work. - Answer the infrared light drops the resistance
across a lead sulfide cell allowing current to flow, this is picked up by the controler, if there is no
flame then there is no current
what are some oil safeties point them out, - Answer fusible link,low pressure oil switch
what are some gas safeties - Answer solenoids, high and low press gas switch, proof of
closure. Solenoids fail closed upon loss of power
what if the proof of closure valve is stuck open can the boiler light on oil. - Answer no
where is the low pressure gas cut out - Answer on the gas line before the regulator
