4th TSSA Part B - Unit 4 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Larger capacity, high pressure fuel trains are - CORRECT ANSWER - more complex
The main burner test firing valve should be opened - CORRECT ANSWER - before
starting the main burner
What is the recommended boiler water pH for wet layup? - CORRECT ANSWER - 10
R4B04-03-03-07 Failure to _____ the furnace thoroughly before light-up can cause a furnace
explosion. - CORRECT 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: - CORRECT ANSWER - Prevent a vacuum
from forming in the boiler
How often should operator rounds be performed? - CORRECT ANSWER - 1 to 3 times
per shift
What should Power Engineers carry at all times? - CORRECT ANSWER - a flashlight
When a power failure occurs, control valves - CORRECT ANSWER - go to a fail-safe
position.
When a combustion air opening is equipped with dampers, the dampers must be - CORRECT
ANSWER - interlocked with the burner, and fully open before starting the boiler.
, New boilers require a _____________ and a _____________ dry-out before entering operation. -
CORRECT 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: - CORRECT 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. - CORRECT ANSWER - mercaptan
In a multiple boiler high pressure steam plant, when starting an entire system from cold -
CORRECT 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 - CORRECT
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? - CORRECT
ANSWER - ASME Section I
R4B04-01-02-04 New refractory in a boiler must be thoroughly dried on low fire - CORRECT
ANSWER - to dry the refractory slowly and keep it from cracking.
What is the recommended test frequency for flame safeguard devices? - CORRECT
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 - CORRECT ANSWER - 138 kPa.
R4B04-03-03-06 Furnace explosions may be caused by: - CORRECT ANSWER - The
accumulation of fuel-air mixture in the furnace
ACTUAL Exam Questions and CORRECT
Answers
Larger capacity, high pressure fuel trains are - CORRECT ANSWER - more complex
The main burner test firing valve should be opened - CORRECT ANSWER - before
starting the main burner
What is the recommended boiler water pH for wet layup? - CORRECT ANSWER - 10
R4B04-03-03-07 Failure to _____ the furnace thoroughly before light-up can cause a furnace
explosion. - CORRECT 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: - CORRECT ANSWER - Prevent a vacuum
from forming in the boiler
How often should operator rounds be performed? - CORRECT ANSWER - 1 to 3 times
per shift
What should Power Engineers carry at all times? - CORRECT ANSWER - a flashlight
When a power failure occurs, control valves - CORRECT ANSWER - go to a fail-safe
position.
When a combustion air opening is equipped with dampers, the dampers must be - CORRECT
ANSWER - interlocked with the burner, and fully open before starting the boiler.
, New boilers require a _____________ and a _____________ dry-out before entering operation. -
CORRECT 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: - CORRECT 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. - CORRECT ANSWER - mercaptan
In a multiple boiler high pressure steam plant, when starting an entire system from cold -
CORRECT 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 - CORRECT
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? - CORRECT
ANSWER - ASME Section I
R4B04-01-02-04 New refractory in a boiler must be thoroughly dried on low fire - CORRECT
ANSWER - to dry the refractory slowly and keep it from cracking.
What is the recommended test frequency for flame safeguard devices? - CORRECT
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 - CORRECT ANSWER - 138 kPa.
R4B04-03-03-06 Furnace explosions may be caused by: - CORRECT ANSWER - The
accumulation of fuel-air mixture in the furnace
