NJ BOILER BLACK SEAL LP 3
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT!!!
Question: What is the absolute most positive, reliable physical method for an
operator to determine the actual water level inside a steam boiler?
Answer: ✔✔ Manually opening and observing the discharges from the try-cocks.
Question: If a gauge glass reading is suspect or unreadable, what is the best
alternative method to definitively verify the true water level in a steam boiler?
Answer: ✔✔ Testing the water column using the built-in try-cocks.
Question: What is a common mechanical design configuration for an automatic
feedwater regulator typically installed on low-pressure heating boilers?
Answer: ✔✔ A pressure-sensitive device (or a float-operated mechanism that
reacts directly to changes in water column pressure/level).
Question: During a routine inspection of your boiler room, you hear an unusual,
loud metallic noise coming from the operating feedwater pump. You notice the
pump casing is hot to the touch and the water temperature has spiked well above
normal. What is the most likely cause of these symptoms?
Answer: ✔✔ Pump cavitation (caused by feedwater flashing into vapor inside the
pump impellers due to high temperatures or low suction pressure).
Question: While inspecting a centrifugal pump equipped with a standard packed
stuffing box, you notice a small, steady drip of liquid coming from the packing
gland. How should you evaluate this condition?
, Answer: ✔✔ This is completely normal and necessary; a slight, controlled leakage
is required to lubricate and cool the packing material to prevent it from burning up.
What is the primary purpose of a feedwater regulator? - ANSWER....to maintain
the water level in the boiler at the proper level
Which of the following valves is used in a steam feedwater supply line to control
the direction of fluid flow to prevent backflow in a system? - ANSWER....check
valve
What is the prime purpose of the try cocks found on boilers? - ANSWER....to
ascertain the water level in the boiler
The most important rule in the safe operation of a steam boiler is to: -
ANSWER....keep the boiler water at the proper level
An operator must be familiar with how water pressure works and the basic
concepts that determine pressure head. Therefore, a column of water 1-inch and 1-
foot high weighs how much? - ANSWER.....433 lbs
When taking over a shift, the operator must first check: - ANSWER....water level
on all boilers online by blowing down the water column and gauge glass
The water temperature indicator of a hot water heating boiler should measure the
temperature: - ANSWER....at the boiler supply
What should new or re-tubed boilers be cleaned with? - ANSWER....an alkaline
detergent solution
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT!!!
Question: What is the absolute most positive, reliable physical method for an
operator to determine the actual water level inside a steam boiler?
Answer: ✔✔ Manually opening and observing the discharges from the try-cocks.
Question: If a gauge glass reading is suspect or unreadable, what is the best
alternative method to definitively verify the true water level in a steam boiler?
Answer: ✔✔ Testing the water column using the built-in try-cocks.
Question: What is a common mechanical design configuration for an automatic
feedwater regulator typically installed on low-pressure heating boilers?
Answer: ✔✔ A pressure-sensitive device (or a float-operated mechanism that
reacts directly to changes in water column pressure/level).
Question: During a routine inspection of your boiler room, you hear an unusual,
loud metallic noise coming from the operating feedwater pump. You notice the
pump casing is hot to the touch and the water temperature has spiked well above
normal. What is the most likely cause of these symptoms?
Answer: ✔✔ Pump cavitation (caused by feedwater flashing into vapor inside the
pump impellers due to high temperatures or low suction pressure).
Question: While inspecting a centrifugal pump equipped with a standard packed
stuffing box, you notice a small, steady drip of liquid coming from the packing
gland. How should you evaluate this condition?
, Answer: ✔✔ This is completely normal and necessary; a slight, controlled leakage
is required to lubricate and cool the packing material to prevent it from burning up.
What is the primary purpose of a feedwater regulator? - ANSWER....to maintain
the water level in the boiler at the proper level
Which of the following valves is used in a steam feedwater supply line to control
the direction of fluid flow to prevent backflow in a system? - ANSWER....check
valve
What is the prime purpose of the try cocks found on boilers? - ANSWER....to
ascertain the water level in the boiler
The most important rule in the safe operation of a steam boiler is to: -
ANSWER....keep the boiler water at the proper level
An operator must be familiar with how water pressure works and the basic
concepts that determine pressure head. Therefore, a column of water 1-inch and 1-
foot high weighs how much? - ANSWER.....433 lbs
When taking over a shift, the operator must first check: - ANSWER....water level
on all boilers online by blowing down the water column and gauge glass
The water temperature indicator of a hot water heating boiler should measure the
temperature: - ANSWER....at the boiler supply
What should new or re-tubed boilers be cleaned with? - ANSWER....an alkaline
detergent solution
