4th TSSA Part B Test (I) 2025/2026 Exam
Questions and Answers | A+ Score
Assured
When a combustion air opening is equipped with dampers, the dampers
must be - 🧠ANSWER ✔✔interlocked with the burner, and fully open before
starting the boiler.
R4B05-03-02-02 A substance that absorbs humidity inside a boiler during
dry layup is: - 🧠ANSWER ✔✔Activated alumina
(4-142-1.3) The high oil temperature shutdown device of an oil-fired heater
senses the: - 🧠ANSWER ✔✔Oil temperature at the furnace outlet
R4B04-01-02-06 A boiler furnace pre-purge: - 🧠ANSWER ✔✔must last a
specific amount of time.
R4B08-02-01-05 In a building plumbing system, the potable water pressure
should not drop below: - 🧠ANSWER ✔✔175 kPa
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,(4-066-1.13) Which of the following is an example of a dissolved solid? -
🧠ANSWER ✔✔Magnesium sulphate
(4-143-2.11) "Barking", as it occurs in a pulp mill, means: - 🧠ANSWER
✔✔The removal of bark from the logs
R4B01-02-03-09 A collar thrust bearing: - 🧠ANSWER ✔✔Has boundary
lubrication
4B07-04-01-02 The combustion chamber of a gas turbine: - 🧠ANSWER
✔✔is where fuel is added to air, andburned.
R4B01-01-02-08 All semi-solid lubricants: - 🧠ANSWER ✔✔Are capable of
sealing out dirt and water from bearings
(4-074-2.7) Compression type packing: - 🧠ANSWER ✔✔May be saturated
with a lubricating material
(4-059-3.4) The set pressure of a safety valve may only be adjusted by: -
🧠ANSWER ✔✔the safety valve manufacturer, its authorized representative,
or an assembler
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, (4-127-1.3) Air duct velocity pressure is measured by connecting a: -
🧠ANSWER ✔✔Manometer to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
R4B05-03-03-01 When the fireside of a boiler is opened up, locations of
water leakage may be detected by: - 🧠ANSWER ✔✔White dissolved solids
left from water evaporation
As the temperature of the air drawn into a gas turbine compressor
increases, the____________________ of the gas turbine
_________________. - 🧠ANSWER ✔✔output power, decreases
(4-066-3.6) The zeolite inside a water softener is used to: - 🧠ANSWER
✔✔Exchange sodium ions for calcium and magnesium ions
(4-059-1.18) What does the boiler inspector do to prevent tampering with
the settings of a safety valve? - 🧠ANSWER ✔✔Installs a seal
(4-117-2.1) The amount of water used in an evaporative condenser is only
a small percentage of that used in a water-cooled condenser of the same
capacity, because - 🧠ANSWER ✔✔The cooling water evaporates,
removing far more heat per kilogram of system coolant.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
Questions and Answers | A+ Score
Assured
When a combustion air opening is equipped with dampers, the dampers
must be - 🧠ANSWER ✔✔interlocked with the burner, and fully open before
starting the boiler.
R4B05-03-02-02 A substance that absorbs humidity inside a boiler during
dry layup is: - 🧠ANSWER ✔✔Activated alumina
(4-142-1.3) The high oil temperature shutdown device of an oil-fired heater
senses the: - 🧠ANSWER ✔✔Oil temperature at the furnace outlet
R4B04-01-02-06 A boiler furnace pre-purge: - 🧠ANSWER ✔✔must last a
specific amount of time.
R4B08-02-01-05 In a building plumbing system, the potable water pressure
should not drop below: - 🧠ANSWER ✔✔175 kPa
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,(4-066-1.13) Which of the following is an example of a dissolved solid? -
🧠ANSWER ✔✔Magnesium sulphate
(4-143-2.11) "Barking", as it occurs in a pulp mill, means: - 🧠ANSWER
✔✔The removal of bark from the logs
R4B01-02-03-09 A collar thrust bearing: - 🧠ANSWER ✔✔Has boundary
lubrication
4B07-04-01-02 The combustion chamber of a gas turbine: - 🧠ANSWER
✔✔is where fuel is added to air, andburned.
R4B01-01-02-08 All semi-solid lubricants: - 🧠ANSWER ✔✔Are capable of
sealing out dirt and water from bearings
(4-074-2.7) Compression type packing: - 🧠ANSWER ✔✔May be saturated
with a lubricating material
(4-059-3.4) The set pressure of a safety valve may only be adjusted by: -
🧠ANSWER ✔✔the safety valve manufacturer, its authorized representative,
or an assembler
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, (4-127-1.3) Air duct velocity pressure is measured by connecting a: -
🧠ANSWER ✔✔Manometer to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
R4B05-03-03-01 When the fireside of a boiler is opened up, locations of
water leakage may be detected by: - 🧠ANSWER ✔✔White dissolved solids
left from water evaporation
As the temperature of the air drawn into a gas turbine compressor
increases, the____________________ of the gas turbine
_________________. - 🧠ANSWER ✔✔output power, decreases
(4-066-3.6) The zeolite inside a water softener is used to: - 🧠ANSWER
✔✔Exchange sodium ions for calcium and magnesium ions
(4-059-1.18) What does the boiler inspector do to prevent tampering with
the settings of a safety valve? - 🧠ANSWER ✔✔Installs a seal
(4-117-2.1) The amount of water used in an evaporative condenser is only
a small percentage of that used in a water-cooled condenser of the same
capacity, because - 🧠ANSWER ✔✔The cooling water evaporates,
removing far more heat per kilogram of system coolant.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
