increase exhaust gas velocity through the boiler
reduce accumulations of carbon deposits on the heat transfer surfaces
eliminate exhaust gas pulsations and noise
increase the rate of heat transfer to the waterside
第1题：
The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust ______.
A.gas composition
B.gas temperature
C.pressure
D.timing
第2题：
to reduce heat stress
to reduce low temperature corrosion
to improve firing and starting performance
fuel saving
第3题：
A.with
B.by
C.to
D.into
第4题：
decorating the house
showing off one’s artistic taste
reminding people of things past
revealing one’s tendency to waste money
第5题：
第6题：
Control of evaporation
A separate means to prevent feed-water contamination
Power circulating pump
Super-heater
第7题：
to increase the system efficiency by sensible heat transfer
to stop the liquid from flashing
to reduce the load on the compressor
to remove latent heat of vaporization and the suction piping transfer
第8题：
For what purpose are the diving pipes used?
A. To absorb heat from the sun.
B. To store heat for future use.
C. To turn solar energy into heat energy.
D. To carry heat down below the surface.
第9题：
prevent engine back pressure at heavy loads
increase total engine efficiency at low loads
prevent boiler corrosion at low engine loads
improve engine fuel consumption at any load
第10题：
cyclone furnace boiler type
dry back boiler type
water-tube type
critical circulation boiler type