chapter 12 Flashcards
A hissing sound at the front or rear of a firetube boiler could indicate:
a. Incomplete combustion
b. High gas pressure
c. Overfiring
d. A tube leak
d
Black light is the popular name for invisible light in the near ____________ range of wave lengths
a. Violet light
b. Ultraviolet
c. Green light
d. Ultrasonic
b
When performing a hydrostatic test, the pressure on the boiler should be increased to:
a. 5 x the safety valve setting
b. 1.5 X the boiler’s MAWP
c. Just below the safety valve setting
d. 2.5 X the boiler’s MAWP
b
The Dye-penetrant and the Black Light methods of non-destructive testing both detect:
a. Discontinuities within the metal
b. Surface cracks
c. Corrosion
d. Scale Build-up
b
In a firetube boiler, cracks in the ends of firetubes are not serious because the tube ends are not pressure components.
True False
false
When a boiler is to be kept out of service for a considerable length of time, proper layup will protect it from:
a. Corrosion
b. Over-firing
c. Thermal Shock
d. Priming
a
Portable lamps of ________________ or less, with current supplied from a transformer to batteries, should be provided to eliminate the danger of electrocution to personnel inside the boiler.
a. 24V
b. 12V
c. 110V
d. 1.5V
b
“Wet lay-up” means:
a. Boiler water carryover into the steam main
b. The fuel-water ratio is set for standby service
c. The boiler is on stand-by, ready to be placed into service in a relatively short time period
d. The condensate system is chemically treated to protect against corrosion
c
Inspect the boiler feed or circulating pump packing glands:
a. for proper oil level
b. Weekly
c. Semi-annually
d. For out-of-round condition
b
If you see signs that indicate there may be a tube leaking in your firetube boiler you should:
a. Contact the Boiler Inspection branch immediately and leave the boiler in service until the inspector arrives
b. Shut down the boiler immediately and evacuate the building
c. Shut down the boiler immediately and drain the water in the boiler immediately to avoid explosion
d. Shut down the boiler immediately and maintain normal water level in the boiler until the boiler cools down
d
The internal inspection is a thorough examination of both the _____ and the _____ of the boiler.
1. Fireside
2. Outside
3. Waterside
4. Topside
A.2, 3
B.1, 2
C.1, 4
D.1, 3
E.2, 4
d
In the wet boiler lay up method after the boiler water has cooled it is filled:
A.To half a gauge glass
B.To the bottom of the gauge glass
C.To the top of the gauge glass
D.To half fill the boiler
E.Completely
e
Leakage of a few drops a minute leakage from the packing gland of circulating pumps is desirable to prevent drying out of packing and:
A.Corrosion of the shaft
B.Prevent ingress of air
C.Over cooling of the shaft
D.Scoring of the shaft
E.Creating to large a mess
d
Whenever there are signs of a tube leak during boiler operation:
A.Close the stop valve on the steam outlet
B.Shut down the boiler immediately
C.Watch that it does not get worse
D.Reduce the firing rate to the minimum
E.Maintain a steady firing rate
b
Flame retarders can be found in the boiler:
A.Shell
B.Steam drum
C.Water tubes
D.Mud drum
E.Fire tubes
e
