Power Engineering 3B1 1-8 UPDATED ACTUAL Questions and
CORRECT Answers
Question: A particular application of the once-through boiler design is the steam-flooding boiler. This is a
boiler used for flooding oil wells with steam in order to increase the oil recovery. a. True b. False
Correct Answer: a
Question: team injection is a procedure for increasing the recovery of oil from wells, which have been
_______ depleted. a. completely b. partially c. entirely d. almost
Correct Answer: b
Question: The reason for the use of steam is to allow the maximum quantity of heat to be put into the well
with the ________ quantity of injected fluid. a. minimum b. maximum c. most d. super
Correct Answer: a
Question: In order to keep the salts in the boiler water dissolved, and to avoid deposits on the tubes, the
steam produced contains _____ moisture. a. 30% b. 50% c. 20% d. 10%
Correct Answer: c
Question: Outputs from Steam Flooding Boilers range from ___ million kJ/h to ___ million kJ/h in
standard sizes. a. 1,100 b. 5,50 c. 100 , 200 d. 1,50
Correct Answer: b
Question: One method of burning _____ is called fluidized bed combustion. a. liquids b. wood c. methane
d. coa
Correct Answer: d
Question: Crushed coal from 1.6 mm to 6 mm is injected into the bed by means of an ________. a. elevato
b. air-stream c. injector d. pulverizer
Correct Answer: b
Question: Combustion air is introduced underneath the bed and is blown through the entire bed. a. True b.
False
Correct Answer: a
Question: Fluidized bed boilers have the ability to burn ________ fuels in an environmentally acceptable
manner. a. low grade b. high grade c. liquid d. vaporized
Correct Answer: a
Question: Combustion can take place at temperatures ranging from ____°C to ____°C instead of normal
combustion temperatures of 1600°C to 1900°C for pulverized coal and oil firing. a. 300 , 500 b. 200 , 400 c.
800 , 900 d. 600 , 700
Correct Answer: c
Question: Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can
be added to the bed. It acts as a sorbent to remove _____ from the flue gases. a. SO2 b. O2 c. NoX d. W ater
Correct Answer: a
,Question: Bubbling Fluid Bed Boilers (BFB) are subject to _____ erosion rates. a. low b. moderate c.
extreme d. high
Correct Answer: d
Question: The concept of using waste energy to generate steam has been gaining in popularity. This is
mainly because of ______ fuel costs a. lower b. moderate c. higher d. more
Correct Answer: c
Question: A simple combined cycle power generation system can consist of
Correct Answer: a. a single gas turbine generator b. a HRSG (heat recovery steam generator) c. a single
steam turbine-generator d. condenser e. all of the above: e
Question: The HRSG has supplemental firing in the form of duct burners. These are coal fired and are used
to add additional heat to the boiler coils. a. True b. False
Correct Answer: b
Question: The main application for ______ boilers is steam generation using gas turbine exhaust gas as a
heat source. a. fluidized bed b. HRSG c. Once through d. Steam flooding
Correct Answer: b
Question: The Kraft Process uses sodium sulfide (NaSO4) as a makeup chemical. a. True b. False
Correct Answer: b
Question: Combustion air is fed at three elevations of the furnace
Correct Answer: primary, secondary, and ______. a. upper b. lower c. tertiary d. after: b
Question: The liquor droplets must be ______ enough to minimize entrainment in the combustion gases. a.
small b. large c. dispersed d. fine
Correct Answer: b
Question: The primary function of the recovery boiler is to process ______ liquor a. white b. green c. black
d. liquor
Correct Answer: c
Question: List the five functions of the auxiliary fuel burners. 1. Raise steam during startup 2. Sustain a
stable ignition while establishing a char bed 3. Stabilize conditions during upsets in the black liquor feed 4.
Produce extra steam as required by the process of for power production 5. Burn out the char bed when
shutting down 6. Maintain furnace temperatures a. 1,2,3,4,5 b. 3,4,5,6 c. 1,3,5 d. 1,2,3,4,5,6
Correct Answer: a
Question: If water contacts molten smelt, a violent explosion will result. It is not a _______ reaction but a
_________ reaction. a. chemical, physical b. physical, chemical c. violent, mild d. small, large
Correct Answer: a
Question: If the black liquor is too ______, it too can result in an explosion a. strong b. thin c. weak d. thick
Correct Answer: c
Question: Heat recovery started to be added to the refuse incinerators, as did strict air pollution guidelines.
The basic incinerators with waste heat recovery have evolved into _________ boilers with integral stokers
,a. packaged b. fire tubed c. open harth d. water-wall
Correct Answer: d
Question: The combustion products from burning municipal waste are very ________ a. hot b. corrosive c.
many d. wet
Correct Answer: b
Question: There is also corrosion caused by _________ in refuse-fired boilers a. chlorides b. fuels c.
materials d. burning
Correct Answer: a
Question: The higher the tube metal temperature, the ________ the degree of tube metal loss a. less b.
greater c. minimum d. smaller
Correct Answer: b
Question: Corrosion of the ______ furnace area of the boiler can be severe during refuse firing a. upper b.
middle c. lower d. recovery
Correct Answer: c
Question: InconelTM is an alloy composed mostly of ______ and chromium. a. lead b. copper c. steel d.
nickel
Correct Answer: d
Question: Biomass is anything that is or recently was alive, such as leaves, grasses, bamboo, vine
clippings, sugar cane, coffee grounds, and rice hulls a. True b. False
Correct Answer: a
Question: Systems to burn wood and biomass usually involve a separate ________, called a dutch oven, or
a traveling grate or vibrating grate arrangement a. oven b. furnace c. collection d. burner
Correct Answer: b
Question: The pinhole grates have __________ air holes to admit air to the burning material on the grate. a.
venture-type b. square c. round d. large
Correct Answer: c
Question: The vibrating grate systems, have grate bars attached to a frame that _______ to remove the ash.
a. rotate b. move c. vibrate d. turn
Correct Answer: c
Question: The vibration also serves to aid combustion by _______ out the bed of burning biomass. a.
shaking b. leveling c. turning d. moving
Correct Answer: b
Question: Packaged watertube boilers capacities range from? a. 2300 kg to 65000 kg per hour b. 500 kg to
100 mg per hour c. 15 psi to 15000 kg per hour d. 65000 to 100000 kg per hour
Correct Answer: a
Question: The main advantage of the packaged boiler is its _____ _____. a. small size b. compact design c.
low cost d. quality steam
, Correct Answer: c
Question: Field erected boilers have outputs of? a. 75000 kg/h b. 100000 kg/h c. 100 mg/h d. 150000 kg/h
or more
Correct Answer: d
Question: One square meter of heating surface equals 10 kilowatts. The heating surface of a boiler must be
determined by computing the area of the surface involved in square metres and where a computation is to be
made of a curved surface; the surface having the greater radius shall be taken. a. True b. False
Correct Answer: a
Question: Where electric power is used as the heating source, the boiler rating shall be the maximum
kilowatt rating of the ______ ______. a. Power Plant b. Heating element c. Boiler wiring d. MCC
Correct Answer: b
Question: Where the boiler provides the entire steam supply to an electric generating unit, the output of the
boiler is expressed in terms of power output of the generator (for example a 300 megawatt boiler). a. True b.
False
Correct Answer: a
Question: The downcomers are located in the ______ regions of the boiler, or external to the furnace
altogether. The risers are located in the ________ zones of the boiler, being exposed to radiant heat of the
furnace or to the very hot flue gases near the furnace. a. back, front b. cooler, hottest c. water, furnace d.
drum, radiant
Correct Answer: b
Question: Most downcomers run horizontally between the steam drum and the mud drum. a. True b. False
Correct Answer: b
Question: The steam separating equipment separates the _______ from the steam/water mixture. a. water b.
steam c. impurities d. water droplets
Correct Answer: b
Question: There are several factors that influence the natural circulation in a watertube boiler. These are
Correct Answer: a. The height of the steam drum above the bottom drum or header. b. The amount of heat
applied to the tube. The hotter the tube becomes, the more steam bubbles are formed, creating more mass
differential and thus more circulation. c. The operating pressure of the boiler. As boiler pressures increase,
the density of the steam increases d. The cleanliness of the tubes can also affect circulation. e. All of the
above: e
Question: The purpose of the downcomer is to supply
Correct Answer: a. Hot water to the steam drum b. Cool water to the steam drum c. Cool water from steam
drum to rest of boiler d. Steam to steam drum e. boiler feed water to the boiler: c
Question: These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace
walls. a. watertubes b. fans c. desuperheaters d. air circulation
Correct Answer: a
CORRECT Answers
Question: A particular application of the once-through boiler design is the steam-flooding boiler. This is a
boiler used for flooding oil wells with steam in order to increase the oil recovery. a. True b. False
Correct Answer: a
Question: team injection is a procedure for increasing the recovery of oil from wells, which have been
_______ depleted. a. completely b. partially c. entirely d. almost
Correct Answer: b
Question: The reason for the use of steam is to allow the maximum quantity of heat to be put into the well
with the ________ quantity of injected fluid. a. minimum b. maximum c. most d. super
Correct Answer: a
Question: In order to keep the salts in the boiler water dissolved, and to avoid deposits on the tubes, the
steam produced contains _____ moisture. a. 30% b. 50% c. 20% d. 10%
Correct Answer: c
Question: Outputs from Steam Flooding Boilers range from ___ million kJ/h to ___ million kJ/h in
standard sizes. a. 1,100 b. 5,50 c. 100 , 200 d. 1,50
Correct Answer: b
Question: One method of burning _____ is called fluidized bed combustion. a. liquids b. wood c. methane
d. coa
Correct Answer: d
Question: Crushed coal from 1.6 mm to 6 mm is injected into the bed by means of an ________. a. elevato
b. air-stream c. injector d. pulverizer
Correct Answer: b
Question: Combustion air is introduced underneath the bed and is blown through the entire bed. a. True b.
False
Correct Answer: a
Question: Fluidized bed boilers have the ability to burn ________ fuels in an environmentally acceptable
manner. a. low grade b. high grade c. liquid d. vaporized
Correct Answer: a
Question: Combustion can take place at temperatures ranging from ____°C to ____°C instead of normal
combustion temperatures of 1600°C to 1900°C for pulverized coal and oil firing. a. 300 , 500 b. 200 , 400 c.
800 , 900 d. 600 , 700
Correct Answer: c
Question: Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can
be added to the bed. It acts as a sorbent to remove _____ from the flue gases. a. SO2 b. O2 c. NoX d. W ater
Correct Answer: a
,Question: Bubbling Fluid Bed Boilers (BFB) are subject to _____ erosion rates. a. low b. moderate c.
extreme d. high
Correct Answer: d
Question: The concept of using waste energy to generate steam has been gaining in popularity. This is
mainly because of ______ fuel costs a. lower b. moderate c. higher d. more
Correct Answer: c
Question: A simple combined cycle power generation system can consist of
Correct Answer: a. a single gas turbine generator b. a HRSG (heat recovery steam generator) c. a single
steam turbine-generator d. condenser e. all of the above: e
Question: The HRSG has supplemental firing in the form of duct burners. These are coal fired and are used
to add additional heat to the boiler coils. a. True b. False
Correct Answer: b
Question: The main application for ______ boilers is steam generation using gas turbine exhaust gas as a
heat source. a. fluidized bed b. HRSG c. Once through d. Steam flooding
Correct Answer: b
Question: The Kraft Process uses sodium sulfide (NaSO4) as a makeup chemical. a. True b. False
Correct Answer: b
Question: Combustion air is fed at three elevations of the furnace
Correct Answer: primary, secondary, and ______. a. upper b. lower c. tertiary d. after: b
Question: The liquor droplets must be ______ enough to minimize entrainment in the combustion gases. a.
small b. large c. dispersed d. fine
Correct Answer: b
Question: The primary function of the recovery boiler is to process ______ liquor a. white b. green c. black
d. liquor
Correct Answer: c
Question: List the five functions of the auxiliary fuel burners. 1. Raise steam during startup 2. Sustain a
stable ignition while establishing a char bed 3. Stabilize conditions during upsets in the black liquor feed 4.
Produce extra steam as required by the process of for power production 5. Burn out the char bed when
shutting down 6. Maintain furnace temperatures a. 1,2,3,4,5 b. 3,4,5,6 c. 1,3,5 d. 1,2,3,4,5,6
Correct Answer: a
Question: If water contacts molten smelt, a violent explosion will result. It is not a _______ reaction but a
_________ reaction. a. chemical, physical b. physical, chemical c. violent, mild d. small, large
Correct Answer: a
Question: If the black liquor is too ______, it too can result in an explosion a. strong b. thin c. weak d. thick
Correct Answer: c
Question: Heat recovery started to be added to the refuse incinerators, as did strict air pollution guidelines.
The basic incinerators with waste heat recovery have evolved into _________ boilers with integral stokers
,a. packaged b. fire tubed c. open harth d. water-wall
Correct Answer: d
Question: The combustion products from burning municipal waste are very ________ a. hot b. corrosive c.
many d. wet
Correct Answer: b
Question: There is also corrosion caused by _________ in refuse-fired boilers a. chlorides b. fuels c.
materials d. burning
Correct Answer: a
Question: The higher the tube metal temperature, the ________ the degree of tube metal loss a. less b.
greater c. minimum d. smaller
Correct Answer: b
Question: Corrosion of the ______ furnace area of the boiler can be severe during refuse firing a. upper b.
middle c. lower d. recovery
Correct Answer: c
Question: InconelTM is an alloy composed mostly of ______ and chromium. a. lead b. copper c. steel d.
nickel
Correct Answer: d
Question: Biomass is anything that is or recently was alive, such as leaves, grasses, bamboo, vine
clippings, sugar cane, coffee grounds, and rice hulls a. True b. False
Correct Answer: a
Question: Systems to burn wood and biomass usually involve a separate ________, called a dutch oven, or
a traveling grate or vibrating grate arrangement a. oven b. furnace c. collection d. burner
Correct Answer: b
Question: The pinhole grates have __________ air holes to admit air to the burning material on the grate. a.
venture-type b. square c. round d. large
Correct Answer: c
Question: The vibrating grate systems, have grate bars attached to a frame that _______ to remove the ash.
a. rotate b. move c. vibrate d. turn
Correct Answer: c
Question: The vibration also serves to aid combustion by _______ out the bed of burning biomass. a.
shaking b. leveling c. turning d. moving
Correct Answer: b
Question: Packaged watertube boilers capacities range from? a. 2300 kg to 65000 kg per hour b. 500 kg to
100 mg per hour c. 15 psi to 15000 kg per hour d. 65000 to 100000 kg per hour
Correct Answer: a
Question: The main advantage of the packaged boiler is its _____ _____. a. small size b. compact design c.
low cost d. quality steam
, Correct Answer: c
Question: Field erected boilers have outputs of? a. 75000 kg/h b. 100000 kg/h c. 100 mg/h d. 150000 kg/h
or more
Correct Answer: d
Question: One square meter of heating surface equals 10 kilowatts. The heating surface of a boiler must be
determined by computing the area of the surface involved in square metres and where a computation is to be
made of a curved surface; the surface having the greater radius shall be taken. a. True b. False
Correct Answer: a
Question: Where electric power is used as the heating source, the boiler rating shall be the maximum
kilowatt rating of the ______ ______. a. Power Plant b. Heating element c. Boiler wiring d. MCC
Correct Answer: b
Question: Where the boiler provides the entire steam supply to an electric generating unit, the output of the
boiler is expressed in terms of power output of the generator (for example a 300 megawatt boiler). a. True b.
False
Correct Answer: a
Question: The downcomers are located in the ______ regions of the boiler, or external to the furnace
altogether. The risers are located in the ________ zones of the boiler, being exposed to radiant heat of the
furnace or to the very hot flue gases near the furnace. a. back, front b. cooler, hottest c. water, furnace d.
drum, radiant
Correct Answer: b
Question: Most downcomers run horizontally between the steam drum and the mud drum. a. True b. False
Correct Answer: b
Question: The steam separating equipment separates the _______ from the steam/water mixture. a. water b.
steam c. impurities d. water droplets
Correct Answer: b
Question: There are several factors that influence the natural circulation in a watertube boiler. These are
Correct Answer: a. The height of the steam drum above the bottom drum or header. b. The amount of heat
applied to the tube. The hotter the tube becomes, the more steam bubbles are formed, creating more mass
differential and thus more circulation. c. The operating pressure of the boiler. As boiler pressures increase,
the density of the steam increases d. The cleanliness of the tubes can also affect circulation. e. All of the
above: e
Question: The purpose of the downcomer is to supply
Correct Answer: a. Hot water to the steam drum b. Cool water to the steam drum c. Cool water from steam
drum to rest of boiler d. Steam to steam drum e. boiler feed water to the boiler: c
Question: These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace
walls. a. watertubes b. fans c. desuperheaters d. air circulation
Correct Answer: a
