ABSA B1 Study Bank Questions and Answers Latest
1. According to their method of operation, pumps can be divided into three
main classes. These are:
a. Direct acting, power driven, plunger type
b. Single acting, double acting, triplex
c. Centrifugal, rotary, reciprocating
d. Three lobe, two screw, internal gear
e. Centrifugal, centripedal, impulse: c
2. 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: A
3. The main advantage of the packaged boiler is its
a. small size
b. compact design
c. low cost
D. quality steam: C
4. Feild erected boilers have outputs of?
A 75,000 kg/h
B 100,000 kg/h
C 100 mg/h
D 150,000 kg/h or more: D
5. Where electric power is used as a heating source, the boiler rating shall be the
maximum kilowatt rating of the
A Power plant
B Heating element
C Boiler wiring
D MCC: B
6. The downcomers are located in the regions of the boiler, or external to
the furnace all together. The risers are located in the zones of the boiler
being exposed to radiant heat of the furnace or very hot flu gases near the
furnace
, ABSA B1 Study Bank Questions and Answers Latest
A Back, front
B Cooler, hottest
C Water, furnace
D Drum, radiant: B
7. The steam separating equipment separates the from the steam/water
mixture
A Water
B Steam
C Impurities
D Water droplets: B
8. There are several factors that influence the natural circulation in a watertube
boiler. These are:
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
9. The purpose of the downcomer is to supply:
A Hot water to the steam drum
B Cool water to the steam drum
C Cool water from the steam drum to the rest of the boiler
D Steam to the steam drum
E Boiler feed water to the boiler: C
10. 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: A
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11. A steam generating unit consists of a number of elements all of which con-
tribute to the production of steam. The elements of a typical steam generator
include:
1 Boiler
2 Superheater
3 Ash removal equipment
4 Reheater
5 Economizer
6 Steam piping
7 Air heater
8 Fuel equipment
9 Draft fans
A 1,2,7,8,9
B 1,2,4,5,7,8,9
C 3,4,6,7,8
D 1,2,3,4,5,7,8,9: D
12. In steam generating units the feed water entering the boiler section 1st
passes through the section where it is heated by the combustion gases
leaving the boiler
A Furnace
B Economizer
C Boiler drum
D Superheater: B
13. Combustion air for the burners is preheated to in the air heater
section by combustion gas is leaving the economizer section
A 150°C
B 100°C
C 350°C
D 500°C: C
14. Generally two types of draft fans are used. A fan supplies air
to the preheater. The preheated air [350°C] for combustion goes to the coal
, ABSA B1 Study Bank Questions and Answers Latest
pulverizers and to the burners. An fan exhaust the combustion
gases [170°C] from the air heater to the stack
A Centre mounted, external mounted
B Forced draft, induced draft
C Induced draft, forced draft
D Turbine draft, ejection draft: B
15. Natural circulation in a boiler depends upon the in the density of
a column of water and the density of a column containing a steam/water
mixture
A Amount
B Mass
C Difference
D Density: C
16. The difference in density between water and saturated steam becomes
progressively less with increased pressure and disappears altogether at the
critical pressure
A 22,106 kPa
B 15,000 kPa
C 10,000 kPa
D 21,206 kPa: A
17. Steam generator is operating above critical pressure are said to be -
critical and steam generator is operating below critical pressure are classified
as - critical
A Sub, super
B Super, sub
C Normal, pre-
D High, low: B
18. The advantage of forced circulation in a boiler is a flow in all tubes
A Negative
B Greater
C Positive
D Mass: C
1. According to their method of operation, pumps can be divided into three
main classes. These are:
a. Direct acting, power driven, plunger type
b. Single acting, double acting, triplex
c. Centrifugal, rotary, reciprocating
d. Three lobe, two screw, internal gear
e. Centrifugal, centripedal, impulse: c
2. 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: A
3. The main advantage of the packaged boiler is its
a. small size
b. compact design
c. low cost
D. quality steam: C
4. Feild erected boilers have outputs of?
A 75,000 kg/h
B 100,000 kg/h
C 100 mg/h
D 150,000 kg/h or more: D
5. Where electric power is used as a heating source, the boiler rating shall be the
maximum kilowatt rating of the
A Power plant
B Heating element
C Boiler wiring
D MCC: B
6. The downcomers are located in the regions of the boiler, or external to
the furnace all together. The risers are located in the zones of the boiler
being exposed to radiant heat of the furnace or very hot flu gases near the
furnace
, ABSA B1 Study Bank Questions and Answers Latest
A Back, front
B Cooler, hottest
C Water, furnace
D Drum, radiant: B
7. The steam separating equipment separates the from the steam/water
mixture
A Water
B Steam
C Impurities
D Water droplets: B
8. There are several factors that influence the natural circulation in a watertube
boiler. These are:
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
9. The purpose of the downcomer is to supply:
A Hot water to the steam drum
B Cool water to the steam drum
C Cool water from the steam drum to the rest of the boiler
D Steam to the steam drum
E Boiler feed water to the boiler: C
10. 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: A
, ABSA B1 Study Bank Questions and Answers Latest
11. A steam generating unit consists of a number of elements all of which con-
tribute to the production of steam. The elements of a typical steam generator
include:
1 Boiler
2 Superheater
3 Ash removal equipment
4 Reheater
5 Economizer
6 Steam piping
7 Air heater
8 Fuel equipment
9 Draft fans
A 1,2,7,8,9
B 1,2,4,5,7,8,9
C 3,4,6,7,8
D 1,2,3,4,5,7,8,9: D
12. In steam generating units the feed water entering the boiler section 1st
passes through the section where it is heated by the combustion gases
leaving the boiler
A Furnace
B Economizer
C Boiler drum
D Superheater: B
13. Combustion air for the burners is preheated to in the air heater
section by combustion gas is leaving the economizer section
A 150°C
B 100°C
C 350°C
D 500°C: C
14. Generally two types of draft fans are used. A fan supplies air
to the preheater. The preheated air [350°C] for combustion goes to the coal
, ABSA B1 Study Bank Questions and Answers Latest
pulverizers and to the burners. An fan exhaust the combustion
gases [170°C] from the air heater to the stack
A Centre mounted, external mounted
B Forced draft, induced draft
C Induced draft, forced draft
D Turbine draft, ejection draft: B
15. Natural circulation in a boiler depends upon the in the density of
a column of water and the density of a column containing a steam/water
mixture
A Amount
B Mass
C Difference
D Density: C
16. The difference in density between water and saturated steam becomes
progressively less with increased pressure and disappears altogether at the
critical pressure
A 22,106 kPa
B 15,000 kPa
C 10,000 kPa
D 21,206 kPa: A
17. Steam generator is operating above critical pressure are said to be -
critical and steam generator is operating below critical pressure are classified
as - critical
A Sub, super
B Super, sub
C Normal, pre-
D High, low: B
18. The advantage of forced circulation in a boiler is a flow in all tubes
A Negative
B Greater
C Positive
D Mass: C
