B-04: Boiler Plant Operation And Management Flashcards
(20 cards)
The main test firing valve should be opened:
A. During a flame-out
B. When testing the high gas pressure cut-off
C. When taking a fuel sample
D. Before starting the main burner
D. Before starting the main burner
ASME.VI states that the differential between the safety relief valve set pressure and the boiler operating pressure should be at least _____ kPa or _____% of the safety relief valve setting, whichever is greater.
A. 69 kPa or 25%
B. 69 kPa or 5%
C. 75 kPa or 25%
D. 75 kPa or 2%
A. 69 kPa or 25%
For a wet layup, what is the recommended boiler water sodium sulfite residual?
A. 40 ppm
B. 10 ppm
C. 50 to 80 ppm
D. 200 ppm
D. 200 ppm
Cutting steam boilers into a pressurized system is different for heating boilers and power boilers, because:
A. Power boilers do not generally have non-return valves
B. Steam heating systems are more complex than power boiler systems
C. Generally speaking, steam heating systems do not use condensate return systems
D. Steam heating systems may not have all the valves and drains that power boiler systems have.
D. Steam heating systems may not have all the valves and drains that power boiler systems have.
New boilers require a _____ and a _____ dry-out before entering operation.
A. Certificate, complete
B. Boil-out, refractory
C. Refractory curing, waterside
D. Mechanical cleaning, fireside
B. Boil-out, refractory
R4B04-01-02-03 If a new boiler is not boiled out correctly, the result may be:
A. Refractory damage
B. Excessive waterside corrosion
C. Excessively high water circulation rates
D. Foaming
D. Foaming
Which of the following actions does NOT result in water hammer?
A. Warming up steam lines using small warm-up lines
B. Closing manual valves quickly
C. Opening manual valves quickly
D. Starting pumps suddenly, with the discharge valves fully open
A. Warming up steam lines using small warm-up lines
Larger capacity, high pressure fuel trains are:
A. Simpler
B. More complex
C. Safer
D. More efficient
B. More complex
Prior to shutting down a hot water boiler for an extended shutdown:
A. Start draining the boiler slowly
B. Raise the pressure to test the safety relief valve
C. Test all operating and limit controls
D. Shut the boiler off when firing on high by closing the main test firing valve.
C. Test all operating and limit controls
R4B04-03-03-06 Furnace explosions may be caused by:
A. Inoperative low water fuel cut-offs
B. The accumulation of fuel-air mixture in the furnace
C. Scale accumulations on the boiler surfaces
D. Excessive furnace purging
B. The accumulation of fuel-air mixture in the furnace
Which of the following is NOT done when preparing a steam boiler feedwater system ?
A. Confirm that the boiler water level is within range
B. Open the feedwater control bypass valve
C. Place the feedwater pressure-treatment equipment in service
D. Verify that the boiler feedwater pumps are in service
B. Open the feedwater control bypass valve
R4B04-03-03-06 Failure to ______ the furnace thoroughly before light-up can cause a furnace explosion.
A. Preheat
B. Soot-blow
C. Cool
D. Purge
D. Purge
How should the operating limit pressure control switch on a steam boiler be tested?
A. Jumper the contacts and observe when the boiler shuts off
B. Remove the control from the boiler and test with a pressure course and a master pressure gauge
C. Observe that the boiler cuts in and cuts out during routine boiler operation
D. Install a new control annually, because the operating limit cannot be easily tested.
C. Observe that the boiler cuts in and cuts out during routine boiler operation.
What is the term for adding a previously non-operating boiler to a system that is already in operation?
A. Cutting in
B. Joining in
C. Adding in
D. Splicing in
A. Cutting in
If the safety relief valve of a hot water heating boiler is set to open at 207 kPa, the operating pressure should not exceed:
A. 138 kPa
B. 207 kPa
C. 52 kPa
D. 155 kPa
A. 138 kPa
R4B04-03-02-05 How often should the low water cut-off of a low pressure steam heating boiler be blown off?
A. Daily
B. Monthly
C. Twice per shift
D. Weekly
A. Daily
R4B04-02-02-02 While warming up and cutting-in a hot water heating boiler with a hot system, which of the following is true?
A. Keep the stop valves in the supply and return lines to the boiler closed during warm-up.
B. While warming up, the boiler must be on “high fire” or “automatic”
C. Close the valves connecting the expansion tank to the on-line boilers, and open the valve that connects the cold boiler to the expansion tank.
D. Make sure the burner shuts off before the safety valve opens.
A. Keep the stop valves in the supply and return lines to the boiler closed during warm-up.
Which of the following is not displayed by a computer-based display?
A. Historical conditions of plant parameters
B. Valve positions
C. Temperatures, levels and pressures
D. Pump maintenance schedule
D. Pump maintenance schedule
Who should verify a steam boiler lockout?
A. Nobody
B. A second qualified operator
C. A representative of the plant workplace safety and health committee
D. Each and every contractor or employee working on the boiler
B. A second qualified operator
Before performing a try level test on a power boiler, what pressure should the boiler be at?
A. The set pressure of the safety valve
B. At least 75% of the set pressure of the safety valve
C. At or above 750 kPa
D. The boiler MAWP
B. At least 75% of the set pressure of the safety valve
