4B - 145 Boiler Maintenance Exam
Questions & Answers (Grade A+)
A steam heating boiler that is to be shut down for six months
during the summer, should be:
a. Drained, thoroughly dried out, quick lime placed inside and left
open.
b. Drained, thoroughly dried out, quick lime placed inside and
closed up.
c. Left with the water at normal working level but opened up to
atmosphere.
d. Left with the water at normal working level and pressurised
with air to 50 kPa.
e. Filled completely with water and the vent left open to
atmosphere. -
correct answer ✅B
A substance that will absorb humidity inside a boiler during dry lay
up is:
a. Zeolite.
b. Sodium sulphite.
c. Sodium chloride.
d. Activated alumina.
, 4B - 145 Boiler Maintenance Exam
Questions & Answers (Grade A+)
e. Lime soda. -
correct answer ✅D
A boiler circulating pump gland should have some leakage:
a. To prevent the packing from drying out.
b. So that the shaft sleeve will take the wear.
c. In order for the stuffing box to run at the desired high
temperature.
d. So the operator can tell when the pump becomes vapour
bound.
e. In order to keep the motor amperage down -
correct answer ✅A
A water tank should be installed above the boiler and attached to
the vent connection during a wet lay up in order to:
a. Permit the injection of chemicals.
b. Prevent air from entering the boiler during water contraction.
c. Hold the manway doors closed.
d. Prevent water vapour from entering the power plant.
Questions & Answers (Grade A+)
A steam heating boiler that is to be shut down for six months
during the summer, should be:
a. Drained, thoroughly dried out, quick lime placed inside and left
open.
b. Drained, thoroughly dried out, quick lime placed inside and
closed up.
c. Left with the water at normal working level but opened up to
atmosphere.
d. Left with the water at normal working level and pressurised
with air to 50 kPa.
e. Filled completely with water and the vent left open to
atmosphere. -
correct answer ✅B
A substance that will absorb humidity inside a boiler during dry lay
up is:
a. Zeolite.
b. Sodium sulphite.
c. Sodium chloride.
d. Activated alumina.
, 4B - 145 Boiler Maintenance Exam
Questions & Answers (Grade A+)
e. Lime soda. -
correct answer ✅D
A boiler circulating pump gland should have some leakage:
a. To prevent the packing from drying out.
b. So that the shaft sleeve will take the wear.
c. In order for the stuffing box to run at the desired high
temperature.
d. So the operator can tell when the pump becomes vapour
bound.
e. In order to keep the motor amperage down -
correct answer ✅A
A water tank should be installed above the boiler and attached to
the vent connection during a wet lay up in order to:
a. Permit the injection of chemicals.
b. Prevent air from entering the boiler during water contraction.
c. Hold the manway doors closed.
d. Prevent water vapour from entering the power plant.
