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单项选择题
A.(1)and(2)
B.(1)and(3)
C.(2)and(3)
D.(1),(2)and(3)
单项选择题
A.higher than the actual drum water level
B.equal to the actual drum water level
C.increasing due to steam condensation in the glass
D.lower than actual drum water level
单项选择题
A.no combustion
B.deposits in the fuel
C.excessive air in the fuel
D.cold fuel oil
单项选择题
A.swell
B.shrinkage
C.flash off
D.lack of water
单项选择题
A.Water Head Register
B.Water Heater Re-circulating
C.Waste Heat Recovery
D.Waste Handle Reference
单项选择题
A.yellowish flame
B.golden yellow flame
C.milky flame
D.brilliant white flame
单项选择题
A.(1)
B.(1)and(2)
C.(2)
D.neither(1)nor(2)
单项选择题
A.latent heat of condensation
B.latent heat of vaporization
C.latent heat of saturation
D.sensible heat of condensation
单项选择题
A.physical state
B.temperature
C.atmospheric pressure
D.sensible pressure
单项选择题
A.The blow down valve
B.The scum valve
C.The air release cock
D.The soot-blower