ABSA 4TH CLASS PART B - COMPREHENSIVE EXAM
3|2025/2026 WITH COMPLETE SOLUTION NEWEST 100%
PASS
1. Which type of oil produces higher fluid friction?
Select one
a. High viscosity oil
b. Low viscosity oil
c. Synthetic oils
d. Fixed oils ANS >> a
2. A counter-flow cooling tower than a crossflow cooling tower.
Select one
a. requires less fan power
b. has a lower pressure drop
c. is shorter
d. requires less floor space ANS >> d
3. Which of the following are chemicals used for boiler cleaning and treatment,
that require careful control and vigilant monitoring?
Select one
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, a. Chelants
b. Phosphates
c. Sulfites
d. Sulfates ANS >> a
4. A hot water system which circulates water through the pipes with a pump is
known as a
Select one
a. Forced circulation system
b. Circulating system
c. Upfeed system
d. Closed system ANS >> a
5. Air compressor oil should
Select one
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, a. Have a very low viscosity
b. Have low carbon residue
c. Have a low flash point
d. Not contain anti-oxidants ANS >> b
6. Although boilers have many different ignition systems, they all follow the
same sequence of steps. Which of the following is the first step?
Select one
a. Run period
b. Main burner ignition
c. Pilot ignition
d. Pre-purge ANS >> d
7. Most municipal water distribution systems operate at pressures between
Select one
a. 590 and 602 kPa
b. 490 and 690 kPa
c. 250 and 350 kPa
d. 350 and 490 kPa ANS >> d
8. In newer steam heating systems, the condensate discharged by the steam
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, traps drains by gravity through the return piping to
Select one
a. A deaerator
b. A combination feeder/cut-off control.
c. A condensate tank
d. The boiler ANS >> c
9. The purpose of a boiler boil out is to
Select one
a. clean the fireside surfaces.
b. dry out the refractory.
https://www.stuvia.com/user/Mboffin
3|2025/2026 WITH COMPLETE SOLUTION NEWEST 100%
PASS
1. Which type of oil produces higher fluid friction?
Select one
a. High viscosity oil
b. Low viscosity oil
c. Synthetic oils
d. Fixed oils ANS >> a
2. A counter-flow cooling tower than a crossflow cooling tower.
Select one
a. requires less fan power
b. has a lower pressure drop
c. is shorter
d. requires less floor space ANS >> d
3. Which of the following are chemicals used for boiler cleaning and treatment,
that require careful control and vigilant monitoring?
Select one
https://www.stuvia.com/user/Mboffin
, a. Chelants
b. Phosphates
c. Sulfites
d. Sulfates ANS >> a
4. A hot water system which circulates water through the pipes with a pump is
known as a
Select one
a. Forced circulation system
b. Circulating system
c. Upfeed system
d. Closed system ANS >> a
5. Air compressor oil should
Select one
https://www.stuvia.com/user/Mboffin
, a. Have a very low viscosity
b. Have low carbon residue
c. Have a low flash point
d. Not contain anti-oxidants ANS >> b
6. Although boilers have many different ignition systems, they all follow the
same sequence of steps. Which of the following is the first step?
Select one
a. Run period
b. Main burner ignition
c. Pilot ignition
d. Pre-purge ANS >> d
7. Most municipal water distribution systems operate at pressures between
Select one
a. 590 and 602 kPa
b. 490 and 690 kPa
c. 250 and 350 kPa
d. 350 and 490 kPa ANS >> d
8. In newer steam heating systems, the condensate discharged by the steam
https://www.stuvia.com/user/Mboffin
, traps drains by gravity through the return piping to
Select one
a. A deaerator
b. A combination feeder/cut-off control.
c. A condensate tank
d. The boiler ANS >> c
9. The purpose of a boiler boil out is to
Select one
a. clean the fireside surfaces.
b. dry out the refractory.
https://www.stuvia.com/user/Mboffin
