4th TSSA Part B - Unit 4 | Exam Questions with Correct Answers and
Answers with Verified Solutions | Latest 2026 Update
Q: Before performing a try lever test on a power boiler, what pressure should the
boiler be at?
Answer:
at least 75% of the set pressure of the safety valve A power boiler in steam service
has a safety valve set to 2000 kPa. What should the maximum operating pressure be
for this boiler? 1800kPa. In many plants, the standby boiler feedwater pump starts
automatically when the on-line pump fails to provide adequate feedwater pressure.
R4B04-02-06-01 Rising stack temperatures, at a given firing rate, indicate heat
transfer surfaces are becoming dirty. How often should a LWCO float chamber
blowdown test be performed on a power boiler? daily R4B04-03-02-04 Rust in the
gauge glass is an indication that: Corrosion is occurring in the system Which of the
following is NOT a way to maintain a positive pressure on a boiler during a wet
layup? use an oxygen scavenger. Which of the following may cause water hammer in
steam lines? missing or damaged pipe insulation. R4B04-03-03-01 If a boiler
sustains a low water condition shut down the burner, let the boiler cool slowly, then
drain and inspect it for damage due to overheating.
, Q: R4B04-02-01-04 Slight smoking when first starting a cold oil-fired boiler occurs
because the furnace is cold. Mechanical chart recorders require regular
replacement of paper and ink. R4B04-01-02-02 A boiler boil-out is done with an
alkaline solution. R4B04-02-01-05 If a cold boiler is warmed up slowly it will
develop less stress due to uneven thermal expansion. With regard to plant
operations, the acronym "STAR" stands for Stop, Think, Act, Review Who can
remove the supervisory lock from the lock box?
Answer:
The chief engineer, shift engineer, or qualified person delegated by the chief
engineer. R4B04-03-03-09 A boiler pressure explosion is NOT caused by:
Insufficient combustion air As part of a preventative maintenance schedule, duty
swaps: distribute wear between regular and standby equipment. R4B04-03-02-05
How often should the low water cut-off of a low pressure steam heating boiler be
blown off? Daily R4B04-02-01-02 When warming up a boiler, it should be: warmed
up at 55 degrees Celsius per hour, to prevent thermal shock
Answers with Verified Solutions | Latest 2026 Update
Q: Before performing a try lever test on a power boiler, what pressure should the
boiler be at?
Answer:
at least 75% of the set pressure of the safety valve A power boiler in steam service
has a safety valve set to 2000 kPa. What should the maximum operating pressure be
for this boiler? 1800kPa. In many plants, the standby boiler feedwater pump starts
automatically when the on-line pump fails to provide adequate feedwater pressure.
R4B04-02-06-01 Rising stack temperatures, at a given firing rate, indicate heat
transfer surfaces are becoming dirty. How often should a LWCO float chamber
blowdown test be performed on a power boiler? daily R4B04-03-02-04 Rust in the
gauge glass is an indication that: Corrosion is occurring in the system Which of the
following is NOT a way to maintain a positive pressure on a boiler during a wet
layup? use an oxygen scavenger. Which of the following may cause water hammer in
steam lines? missing or damaged pipe insulation. R4B04-03-03-01 If a boiler
sustains a low water condition shut down the burner, let the boiler cool slowly, then
drain and inspect it for damage due to overheating.
, Q: R4B04-02-01-04 Slight smoking when first starting a cold oil-fired boiler occurs
because the furnace is cold. Mechanical chart recorders require regular
replacement of paper and ink. R4B04-01-02-02 A boiler boil-out is done with an
alkaline solution. R4B04-02-01-05 If a cold boiler is warmed up slowly it will
develop less stress due to uneven thermal expansion. With regard to plant
operations, the acronym "STAR" stands for Stop, Think, Act, Review Who can
remove the supervisory lock from the lock box?
Answer:
The chief engineer, shift engineer, or qualified person delegated by the chief
engineer. R4B04-03-03-09 A boiler pressure explosion is NOT caused by:
Insufficient combustion air As part of a preventative maintenance schedule, duty
swaps: distribute wear between regular and standby equipment. R4B04-03-02-05
How often should the low water cut-off of a low pressure steam heating boiler be
blown off? Daily R4B04-02-01-02 When warming up a boiler, it should be: warmed
up at 55 degrees Celsius per hour, to prevent thermal shock
