DC 3RD CLASS BOILER FINAL EXAM ACTUAL QUESTIONS
AND ANSWERS GRADED A+
✔✔In an open type expansion tank, how high should the tank be mounted? - ✔✔at least
4 feet above the highest heating element
✔✔Which element does not take an actual action in the combustion process -
✔✔Nitrogen
✔✔Immediately after a repair to refrigeration system, what is used to move moisture -
✔✔Vacuum pump
✔✔What would you add to a boiler if you are needed to protect the refractory from
excess heat and to increase the capacity of the boiler? - ✔✔riser tubes
✔✔A condensate tank has a lot of steam existing from its vent. It is registering 20
Fahrenheit higher than normal. What could be the reason? - ✔✔Steam trap failing open
✔✔What kind of valve allows a boiler to be cut in online when the main isolation valve is
open or closed - ✔✔stop check valve
✔✔In a siphon, what is the water seal between the boiler and the pressure controls
called? - ✔✔condensate
✔✔Where is the cooling tower bleed line? - ✔✔Drain line
✔✔Plume discharges from the cooling tower shall not less than? - ✔✔5 feet
✔✔How is far to in a boiler secured? - ✔✔To the tube sheet
✔✔What kind of steam trap has a simple float/disc that lifts? - ✔✔Inverted bucket
✔✔What type of maintenance is practice when a piece of equipment is allowed to run
until it fails - ✔✔Breakdown
✔✔The height and feet of a liquid above a point such as Pump suction is - ✔✔Static
head
✔✔And the design of a water tube boiler the? - ✔✔gases of combustion pass over the
tubes and the water circulates through the tubes
✔✔Which of the following methods are used to support large furnaces in a SM Boiler -
✔✔Any of the above methods may be used
AND ANSWERS GRADED A+
✔✔In an open type expansion tank, how high should the tank be mounted? - ✔✔at least
4 feet above the highest heating element
✔✔Which element does not take an actual action in the combustion process -
✔✔Nitrogen
✔✔Immediately after a repair to refrigeration system, what is used to move moisture -
✔✔Vacuum pump
✔✔What would you add to a boiler if you are needed to protect the refractory from
excess heat and to increase the capacity of the boiler? - ✔✔riser tubes
✔✔A condensate tank has a lot of steam existing from its vent. It is registering 20
Fahrenheit higher than normal. What could be the reason? - ✔✔Steam trap failing open
✔✔What kind of valve allows a boiler to be cut in online when the main isolation valve is
open or closed - ✔✔stop check valve
✔✔In a siphon, what is the water seal between the boiler and the pressure controls
called? - ✔✔condensate
✔✔Where is the cooling tower bleed line? - ✔✔Drain line
✔✔Plume discharges from the cooling tower shall not less than? - ✔✔5 feet
✔✔How is far to in a boiler secured? - ✔✔To the tube sheet
✔✔What kind of steam trap has a simple float/disc that lifts? - ✔✔Inverted bucket
✔✔What type of maintenance is practice when a piece of equipment is allowed to run
until it fails - ✔✔Breakdown
✔✔The height and feet of a liquid above a point such as Pump suction is - ✔✔Static
head
✔✔And the design of a water tube boiler the? - ✔✔gases of combustion pass over the
tubes and the water circulates through the tubes
✔✔Which of the following methods are used to support large furnaces in a SM Boiler -
✔✔Any of the above methods may be used
