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4th TSSA Part B Unit 4 Exam Questions and Answers.
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4th TSSA Part B Unit 4Exam Questions and
Answers
Larger capacity, high pressure fuel trains are - Answer-more complex
The main burner test firing valve should be opened - Answer-before starting the main
burner
What is the recommended boiler water pH for wet layup? - Answer-10
R4B04-03-03-07 Failure to _____ the furnace thoroughly before light-up can cause a
furnace explosion. - Answer-purge
R4B04-05-02-01 When cooling down a steam boiler that has been taken out of service,
a vent valve on a steam drum should be opened to: - Answer-Prevent a vacuum from
forming in the boiler
How often should operator rounds be performed? - Answer-1 to 3 times per shift
What should Power Engineers carry at all times? - Answer-a flashlight
When a power failure occurs, control valves - Answer-go to a fail-safe position.
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.
New boilers require a _____________ and a _____________ dry-out before entering
operation. - Answer-boil-out, refractory
R4B04-03-03-11 If a steam boiler is in service and no water level shows in the gauge
glass, the first action would be to: - Answer-determine whether the gauge glass is
completely full or completely empty.
Because natural gas is colourless and odourless, ___________ is added to the gas so
that it is easier to detect a leak. - Answer-mercaptan
, In a multiple boiler high pressure steam plant, when starting an entire system from cold
- Answer-The entire system warms and pressurizes as one boiler warms, except for the
boilers being left off line.
On a semi-automatic ignition system, the switch on the supervised cock - Answer-keeps
the boiler from pre-purging if the main test firing valve is open.
Which code contains information on safety valves for high pressure steam boilers? -
Answer-ASME Section I
R4B04-01-02-04 New refractory in a boiler must be thoroughly dried on low fire -
Answer-to dry the refractory slowly and keep it from cracking.
What is the recommended test frequency for flame safeguard devices? - Answer-weekly
If the safety relief valve of a hot water heating boiler is set to open at 207 kPa, the
operating pressure should not exceed - Answer-138 kPa.
R4B04-03-03-06 Furnace explosions may be caused by: - Answer-The accumulation of
fuel-air mixture in the furnace
When preparing to start a steam boiler with a fully modulating firing rate control, set the
manual/automatic switch to _________ and the flame control switch to the __________
position. - Answer-manual, low-fire
Who should verify a steam boiler lockout? - Answer-A second qualified operator.
When closing up a boiler, - Answer-new handhole and manhole gaskets must be used,
to prevent dangerous blowouts and costly unplanned boiler outages.
R4B04-03-02-01 A wide and rapid fluctuation of the water level in a boiler gauge glass
may be the result of: - Answer-High dissolved solids concentration in the boiler water
Which of the following is NOT done when preparing a steam boiler feedwater system? -
Answer-Open the feedwater control bypass valve.
In the event of a power failure, which of the following will likely require a manual restart
when power is restored? - Answer-large air compressors
R4B04-03-03-02 If the water level in the boiler gauge glass cannot be seen, the first
thing to do is: - Answer-Open the gauge glass drain to determine whether the glass is
full or empty.
When warming up a steam boiler, open the boiler drum vent to - Answer-permit the
release of corrosive dissolved gases, such as oxygen and carbon dioxide, from the
boiler water.
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