Power Engineering 4th Class - B4 Verified questions and correct answers
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Power Engineering
Institución
Power Engineering
Power Engineering 4th Class - B4 Verified questions and correct answers
A typical natural gas flame should be:
a. blue, with orange at the tip of the flame
b. asymmetrical, and as close as possible to the heat transfer surfaces.
c. bright yellow, with black tips.
d. bright yellow, with orang...
Power Engineering 4th Class - B4 Verified
questions and correct answers
A typical natural gas flame should be:
a. blue, with orange at the tip of the flame
b. asymmetrical, and as close as possible to the heat transfer surfaces.
c. bright yellow, with black tips.
A
d. bright yellow, with orange tips. - ANS a
VI
Which of the following is NOT done when preparing a steam boiler feedwater system?
a. Confirm that the boiler water level is within range.
TU
b. Verify that the boiler feedwater pumps are in service.
c. Place the feedwater pre-treatment equipment in service.
d. Open the feedwater control bypass valve. - ANS d
IS
How often should operator rounds be performed?
a. once a week
OM
b. 1 to 3 times per shift
c. every hour
d. every day - ANS b
Prior to shutting down a hot water boiler for an extended shutdown:
NA
a. Shut the boiler off when firing on high by closing the main test firing valve.
b. Start draining the boiler slowly.
c. Raise the pressure to test the safety relief valve.
JP
d. Test all operating and limit controls. - ANS d
Failure to _____ the furnace thoroughly before light-up can cause a furnace explosion
a. purge
b. soot-blow
c. cool
d. preheat - ANS a
,To prevent water hammer and the severe damage it causes, it is imperative that
a. steam lines and headers are isolated before boilers are started.
b. steam lines and headers are warmed up before admitting steam to the steam lines.
c. boilers are warmed slowly.
d. steam traps are isolated during warm up. - ANS b
Regarding maintenance programs, what does "PM" stand for?
a. Planned Maintenance
A
b. Preventative Maintenance
c. Periodic Maintenance
VI
d. Plant Maintenance - ANS b
When preparing to start a steam boiler with a fully modulating firing rate control, set the
TU
manual /"automatic switch to _________ and the flame control switch to the
__________ position.
a. manual, low-fire
IS
b. automatic, low-fire
c. manual, high-fire
d. manual, automatic - ANS b
OM
Boilers should be warmed up
a. using only the pilot burner.
b. slowly, to minimize differential expansion and thermal shock
NA
c. rapidly, so the metal heats up faster
d. with maximum combustion air, to prevent smoking - ANS b
The most important rule in safe operation of steam boilers is to:
JP
a. keep water in the boiler at the proper level.
b. try to keep make-up water to a minimum.
c. maintain the boiler room log
d. keep the heat transfer surfaces clean. - ANS a
One way to keep oxygen out of the boiler water system is to:
a. Control the boiler water pH.
, b. Keep the drum vent closed when the boiler is not in operation.
c. Keep make-up water to a minimum.
d. Increase the continuous blowdown to remove water with high dissolved oxygen
concentration. - ANS c
While a boiler is warming up, it is good practice to:
a. operate the sootblowers.
b. perform a try-lever test before the boiler develops pressure.
c. ensure proper operation of the low water fuel cut-off.
A
d. make the manhole and handhole gaskets as tight as possible - ANS c
VI
How often should the desiccant be checked during a dry layup?
a. Semi-annually.
TU
b. Bi-weekly to monthly.
c. Annually.
d. Daily. - ANS b
IS
Which is the first step when starting a boiler's fuel oil system?
a. Start the fuel pump.
OM
b. Reset the low oil pressure cut-off switch.
c. Check for leaks.
d. Check the pressure drop across the fuel filter. - ANS a
Slight smoking when first starting a cold oil-fired boiler
NA
a. occurs because the furnace is cold.
b. is abnormal, and requires immediate attention.
c. is caused by too little fuel pressure.
d. is caused by too much excess air. - ANS a
JP
To help operators keep track of what step they are at in a procedure, the ___________
method is often used.
a. Simplified Startup
b. Circle/Slash
c. Buddy
d. Call-in - ANS b
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