海船船员考试
单选题The furnace of an oil fired boiler should be （） before the operating burner is lit.A filled with waterB purgedC cleared of airD None of the above is true
题目
filled with water
purged
cleared of air
None of the above is true
相似问题和答案
第1题：
A firebox explosion in an automatically fired auxiliary boiler may be the result of ______.
A.excessive purging before lighting off
B.insufficient trail for ignition period
C.a faulty transformer in the ignition circuit
D.insufficient purging before lighting off
第2题：
in the event of a flame failure
in the event of a stack fire
when the water level reach the crown sheet
when the feed pump discharge pressure drops to a preset minimum
第3题：
A.water-tube
B.fire-tube
C.exhaust gas
D.composite
第4题：
open the bypass line
cut in the lube oil cooler
pressurize the lube oil system
top off the expansion tank
第5题：
yellowish flame
golden yellow flame
white flame
brilliant white flame
第6题：
check the pyrometer readings
check the crankcase oil level
check the fuel oil strainers
clean the fuel system
第7题：
descriptions
discrepancies
different
deflections
第8题：
When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.
A.increase the fuel oil temperature
B.decrease the fuel oil temperature
C.decrease the fuel oil supply pressure
D.increase the air supply
第9题：
relight the boiler immediately to prevent loss of steam pressure
relight the fire off the brickwork as the bricks are cherry red
purge the furnace of any combustible gases before attempting to relight the fire
speed up the feed pump to prevent dry firing when the burner flame is reestablished
第10题：
increase the fuel oil temperature
decrease the fuel oil temperature
decrease the fuel oil supply pressure
increase the air supply