EXAM 916 CUSTODIAL MAINTENANCE FULLY
SOLVED TEST PAPER GRADED A+
◉ How does a steam boiler differ from a hot-water boiler?
Answer: It produces steam for distribution.
◉ What should not be done if a nuisance trip occurs on an LWCO?
Answer: Bypassed as a normal response.
◉ What can poor heat transfer in a boiler result from?
Answer: Scale and sediment buildup.
◉ What indicates frequent lifting of a safety valve?
Answer: Another problem such as control failure or overfiring.
◉ What is a danger of a clogged gauge glass connection?
Answer: It may show a false normal water level.
◉ What is the best answer regarding the safety valve?
Answer: It should never be plugged or isolated in service.
,◉ What does the water column connect in a boiler?
Answer: The boiler to the gauge glass and low-water controls.
◉ What is the difference between a pressure control used for
normal cycling and a safety high-limit device?
Answer: The pressure control is used for normal cycling.
◉ What is a common cause of scale buildup in an LWCO chamber?
Answer: Sludge accumulation.
◉ What is the first action if no water is visible in the gauge glass?
Answer: Shut the burner down and determine true water level.
◉ What is the purpose of bottom blowdown?
Answer: To remove sediment from low points.
◉ What is a common misconception about steam boilers?
Answer: That they never need controls.
◉ What should be done if a safety valve is frequently lifting?
Answer: Investigate for control failure or overfiring.
,◉ What does the safety valve protect against?
Answer: Overpressure in the boiler.
◉ What is the main purpose of a safety valve?
Answer: To prevent boiler overpressure.
◉ What is the burner flame?
Answer: The flame produced by the burner in a boiler, used to heat
water and generate steam.
◉ What is the condensate tank?
Answer: A tank that collects condensate, which is the water formed
when steam cools and condenses.
◉ What is the feedwater line?
Answer: A pipe that delivers water to the boiler for steam
generation.
◉ What is the safety high-limit device?
Answer: A safety mechanism that shuts down the boiler if the
temperature exceeds a preset limit.
◉ What is a pressure control used for normal cycling?
, Answer: It is different from the safety high-limit device.
◉ What does blowing down the water column confirm?
Answer: The level passages are open and accurate.
◉ What connects the boiler to the gauge glass?
Answer: The water column.
◉ What is the main purpose of a fuse?
Answer: To protect a circuit by melting open during overcurrent.
◉ What should you do if a breaker keeps tripping?
Answer: Find and correct the cause.
◉ What does grounding mainly help with?
Answer: Stabilizing the system and reducing shock hazards.
◉ What does bonding connect metal parts together for?
Answer: So that fault current can clear safely.
◉ What is a GFCI primarily intended to protect against?
Answer: Ground-fault shock hazards.
SOLVED TEST PAPER GRADED A+
◉ How does a steam boiler differ from a hot-water boiler?
Answer: It produces steam for distribution.
◉ What should not be done if a nuisance trip occurs on an LWCO?
Answer: Bypassed as a normal response.
◉ What can poor heat transfer in a boiler result from?
Answer: Scale and sediment buildup.
◉ What indicates frequent lifting of a safety valve?
Answer: Another problem such as control failure or overfiring.
◉ What is a danger of a clogged gauge glass connection?
Answer: It may show a false normal water level.
◉ What is the best answer regarding the safety valve?
Answer: It should never be plugged or isolated in service.
,◉ What does the water column connect in a boiler?
Answer: The boiler to the gauge glass and low-water controls.
◉ What is the difference between a pressure control used for
normal cycling and a safety high-limit device?
Answer: The pressure control is used for normal cycling.
◉ What is a common cause of scale buildup in an LWCO chamber?
Answer: Sludge accumulation.
◉ What is the first action if no water is visible in the gauge glass?
Answer: Shut the burner down and determine true water level.
◉ What is the purpose of bottom blowdown?
Answer: To remove sediment from low points.
◉ What is a common misconception about steam boilers?
Answer: That they never need controls.
◉ What should be done if a safety valve is frequently lifting?
Answer: Investigate for control failure or overfiring.
,◉ What does the safety valve protect against?
Answer: Overpressure in the boiler.
◉ What is the main purpose of a safety valve?
Answer: To prevent boiler overpressure.
◉ What is the burner flame?
Answer: The flame produced by the burner in a boiler, used to heat
water and generate steam.
◉ What is the condensate tank?
Answer: A tank that collects condensate, which is the water formed
when steam cools and condenses.
◉ What is the feedwater line?
Answer: A pipe that delivers water to the boiler for steam
generation.
◉ What is the safety high-limit device?
Answer: A safety mechanism that shuts down the boiler if the
temperature exceeds a preset limit.
◉ What is a pressure control used for normal cycling?
, Answer: It is different from the safety high-limit device.
◉ What does blowing down the water column confirm?
Answer: The level passages are open and accurate.
◉ What connects the boiler to the gauge glass?
Answer: The water column.
◉ What is the main purpose of a fuse?
Answer: To protect a circuit by melting open during overcurrent.
◉ What should you do if a breaker keeps tripping?
Answer: Find and correct the cause.
◉ What does grounding mainly help with?
Answer: Stabilizing the system and reducing shock hazards.
◉ What does bonding connect metal parts together for?
Answer: So that fault current can clear safely.
◉ What is a GFCI primarily intended to protect against?
Answer: Ground-fault shock hazards.
