Exam (elaborations)
4th Class Power Engineering Unit A11: Introduction to Boiler Designs
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4th Class Power Engineering Unit A11: Introduction to Boiler Designs
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4th Class Power Engineering UnitA11: Introduction to Boiler Designs
This type of boiler is more tolerant of Class 1 water treatment, because they
are more resistant to corrosion:
Select one:
a. coil type
b. fire tube
c. cast iron
d. water tube - -c
-One disadvantage of a firetube boiler is:
Select one:
a. higher maintenance costs than watertube boilers
b. slow response to load changes
c. require very high quality feedwater
d. slow to bring up to operating pressure and temperature - -d
-Tubes used for high pressure boiler service are usually:
Select one:
a. welded
b. rolled
c. seamless
d. beaded - -c
-In this type of sectional cast iron boiler, a single nipple connects two
sections:
Select one:
a. horizontal
b. vertical
c. atmospheric
d. resistance - -a
-A disadvantage of watertube boilers in comparison to firetube boilers is:
Select one:
a. they have poorer water circulation
b. they require much higher quality feedwater
c. they cannot make superheated steam
d. they contain less water at the same steaming capacity - -b
-The two general types of electric boilers are the:
Select one:
a. electrode and immersion
b. generator and immersion
,c. electrode and generator
d. electrode and relay - -a
-In boiler design, even the weakest component of a boiler must be strong
enough to operate at the:
Select one:
a. MANP
b. MASP
c. MAWP
d. MAXP - -c
-Flexible watertube heating boiler tubes are designed for:
Select one:
a. simple replacement
b. maximum flow
c. minimum expansion
d. turbulent scrubbing - -a
-In the jet type electrode boiler, the _________ depends upon the amount of
water sprayed:
Select one:
a. circulation produced
b. voltage produced
c. resistance produced
d. current produced - -d
-Packaged watertube boilers are described by:
Select one:
a. the shape that their tubes and drums form
b. the number of mud drums they employ
c. the area of floor space they occupy
d. the type of drums they employ - -a
-This is the name given to the gaseous products of combustion entering the
stack:
Select one:
a. saturated gas
b. hot gas
c. stack gas
d. flue gas - -d
-This type of boiler is assembled piece by piece on the work site:
Select one:
a. field-assembled
b. field-erected
c. packaged
, d. auxiliary - -b
-A cylindrical pressure vessel component to which heads or matching
components can be attached:
Select one:
a. downcomer
b. riser
c. flue
d. course - -d
-When speaking of boilers, HRT is the acronym for:
Select one:
a. horizontal return tubular
b. horizontal riveted tubular
c. heated return tubular
d. heated riveted tubular - -a
-This type of steam generating unit employs a pump to maintain
water/steam velocity in the tubes:
Select one:
a. fluidized bed
b. radiant
c. convection
d. supercritical - -d
-An advantage of an electric boiler over a fuel fired boiler is:
Select one:
a. they contain more water at the same steaming capacity
b. they are less expensive to purchase
c. they are silent in operation
d. they are simpler to maintain - -c
-This ASME section deals with the "Recommended Guidelines for the Care of
Power Boilers:
Select one:
a. VII
b. VI
c. V
d. IV - -a
-When the scotch boiler is used as a heating boiler, it is equipped with:
Select one:
a. hot water supply and return isolating valves
b. hot water supply and return pumps
c. hot water supply and return drains
d. none of the listed items - -a
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