网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Black smoke coming from a boiler can be caused by （）.
A
low water level
B
low oil pressure
C
excessively high fuel pressure
D
an improper air/fuel ratio
参考答案
参考解析
解析：
暂无解析
更多 “单选题Black smoke coming from a boiler can be caused by （）.A low water levelB low oil pressureC excessively high fuel pressureD an improper air/fuel ratio” 相关考题
考题
When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.A.increase the fuel oil temperatureB.decrease the fuel oil temperatureC.decrease the fuel oil supply pressureD.increase the air supply
考题
Haze is not caused by ______．A.forest firesB.smoke from industrial areasC.dust or sand stormsD.water droplets with the relative humidity more than 95%
考题
If heavy smoke is coming from the paint locker, the FIRST firefighting response should be to ______.A.release the CO2 flooding systemB.open the door to evaluate the extent of the fireC.enter and use a portable extinguisherD.secure the ventilation
考题
It can be known from the passage that increase in the salinity of ocean water is caused by___________.A.melting of sea ice
B.precipitation
C.evaporation
D.supplement of salt
考题
An administrator sees that smoke is coming from the UPS. Which of the following should they doFIRST？（）A、Use a Class A fire extinguisher.B、Evacuate personnel.C、Install additional fans in the UPSD、Backup the servers.
考题
单选题Black smoke exhausting from a diesel engine indicates（）A
proper fuel injectionB
water in the fuelC
incomplete combustionD
burning of lube oil
考题
单选题White smoke exhausting from a diesel engine can be caused by （）A
low combustion temperatureB
a leaking fuel nozzle check valveC
late fuel injectionD
plugged oil-scraper ring hole
考题
单选题The indications of a scavenge fire are excessive black smoke, （） and peeling from scavenge trunking.A
turbo-chargers surgeB
spark seen from the drainsC
paint blisteringD
all above are right
考题
单选题Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）A
water in the fuelB
insufficient fuel for combustionC
clogged air intake passagesD
burning lubricating oil
考题
单选题White smoke exhausting from a diesel engine can be caused by a （）A
high combustion temperatureB
high compression pressureC
cracked cylinder linerD
fuel with a high vanadium content
考题
单选题Black smoke coming from a boiler can be caused by （）.A
low water levelB
high water levelC
excessively high fuel pressureD
low oil temperature
考题
单选题While maneuvering, you discover heavy smoke coming from the turbocharger casing, you should （）A
check the air filter for dirtB
check for an exhaust leakC
check the cooling water temperatureD
notify the bridge that you are going to shut the engine down
考题
单选题White smoke exhausting from a diesel engine can result from （）A
high exhaust temperatureB
high lube oil temperatureC
low turbo-charger speedD
low cooling water temperature
考题
单选题When an auxiliary boiler is panting and emitting black smoke, you should （）.A
increase the fuel oil temperatureB
decrease the fuel oil temperatureC
decrease the fuel oil supply pressureD
increase the air supply
考题
单选题A dark exhaust from a running diesel engine can be caused by （）A
late ignitionB
water in the fuelC
high compression temperatureD
starting valve stuck open
考题
单选题Black smoke exhausting from an operating diesel engine can be caused by （）A
fuel dribbling from leaking fuel injectorsB
burning fuel with a high carbon contentC
burning fuel with a high vanadium contentD
burning fuel with a lower sulphur content
考题
单选题High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.A
engine overloadB
low combustion temperatureC
plugged fuel nozzle holesD
excessive compression pressure
考题
单选题Water in the fuel can prevent the engine from starting, prevent it from developing full power, or （）A
run at an irregular speedB
create high lube oil temperatureC
cause the engine to over-speedD
cause blue smoke in the exhaust
考题
单选题Excessive vibration of an automatically fired auxiliary boiler can be caused by （）A
air or water in the furnaceB
combustion pulsesC
fuel oil pump failureD
flame failure
考题
单选题A burner responsible for producing black smoke in an automatic auxiliary boiler, would be caused by a （）A
defective solenoid valveB
dirty fuel nozzleC
grounded high tension leadD
faulty ignition cable connector
考题
单选题Impurities from the boiler water surface can be removed through the （）.A
safety valveB
blow down valveC
scum valveD
feed check valve
考题
单选题Foaming in the steam drum may be caused by （） in a boiler.A
oxygen in the waterB
poor boiler designC
density too highD
excessive steam demand
考题
单选题Flame failure in an automatically fired auxiliary boiler can from a/an （）A
incorrect electrode settingB
incorrect nozzle positionC
clogged fuel nozzleD
broken high tension lead
考题
单选题If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）A
check the air filter for obstructionB
check for an exhaust leakC
check the exhaust temperatureD
secure the engine
考题
单选题If heavy smoke is coming from the paint locker,the first firefighting response should be to（）.A
release the CO fiooding systemB
open the door to evaluate of the fireC
enter and use a portable extinguisherD
secure the ventilation
考题
单选题Explosions do occur （） caused by the ignition of oil or vapour gaining access from compressors or defective engine starting valves.A
in boiler drumsB
in refrigerating plantsC
in starting air pipesD
in air coolers
考题
单选题The transition of the Earth’s magnetic field is possibly caused by _____.A
the flows of melted iron inside the EarthB
the periodical movement of the EarthC
the mechanical energy of the solar systemD
the force coming from outer space
热门标签
最新试卷
