ABSA 3B1 Practice Exam Questions And Correct
Answers| Latest Update
Chapter 1 - Number Of Questions On Exam - 7
Chapter 1
Packaged water tube 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. 2300 kg to 65000 kg per hour
The main advantage of the packaged boiler is its _____ _____. a. small size
b. compact design
c. low cost
d. quality steam
c. low cost
Field erected boilers have outputs of?
a. 75000 kg/h
b. 100000 kg/h
c. 100 mg/h
,d. 150000 kg/h or more
d. 150000 kg/h or more
One square metre 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
a. True
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
b. heating element
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
a. True
,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
b. cooler, hottest
Most downcomers run horizontally between the steam drum and the mud drum.
a. True
b. False
b. False
The steam separating equipment separates the _______ from the steam/water mixture. a.
water
b. steam
c. impurities
d. water droplets
b. steam
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. All of the above
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 steam drum to rest of boiler
d. Steam to steam drum
e. Boiler feed water to the boiler
d. Steam to steam drum
These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace walls.
a. water tubes
b. fans
c. desuperheaters
d. air circulation
a. water tubes
Answers| Latest Update
Chapter 1 - Number Of Questions On Exam - 7
Chapter 1
Packaged water tube 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. 2300 kg to 65000 kg per hour
The main advantage of the packaged boiler is its _____ _____. a. small size
b. compact design
c. low cost
d. quality steam
c. low cost
Field erected boilers have outputs of?
a. 75000 kg/h
b. 100000 kg/h
c. 100 mg/h
,d. 150000 kg/h or more
d. 150000 kg/h or more
One square metre 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
a. True
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
b. heating element
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
a. True
,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
b. cooler, hottest
Most downcomers run horizontally between the steam drum and the mud drum.
a. True
b. False
b. False
The steam separating equipment separates the _______ from the steam/water mixture. a.
water
b. steam
c. impurities
d. water droplets
b. steam
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. All of the above
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 steam drum to rest of boiler
d. Steam to steam drum
e. Boiler feed water to the boiler
d. Steam to steam drum
These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace walls.
a. water tubes
b. fans
c. desuperheaters
d. air circulation
a. water tubes
