海船船员考试
单选题Diesel engine waste heat boiler construction is usually of the fire-tube or（）A cyclone furnace boiler typeB dry back boiler typeC water-tube typeD critical circulation boiler type
题目
cyclone furnace boiler type
dry back boiler type
water-tube type
critical circulation boiler type
参考答案和解析
相似问题和答案
第1题：
To prevent internal damage form local overheating
To ensure the fuel nozzles are flushed clean
To clear the smoke stack
To let the waste heat boiler reduce its rate of steam generation
第2题：
Control of evaporation
A separate means to prevent feed-water contamination
Power circulating pump
Super-heater
第3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4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5题：
improper adjustment
contaminated fuel
kinked fuel lines
excessive engine vibration
第6题：
electric
heat
mechanical
exhaust
第7题：
possible
necessary
practicable
impracticable
第8题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第9题：
bypass exhaust gas at high loads to prevent excessive back pressure
bypass a portion of the exhaust gas at peak loads for better efficiency
recycle exhaust gas to the turbocharger
minimize moisture condensation in the boiler gas passages at low loads
第10题：
Leaking seal ring
Insufficient heat transfer from the exhaust valves
Block cooling water passages to the head
Excessive scavenging air provided to the engine