更多"In boilers, besides maintaining the"的相关试题:
[单项选择]Fuel injection systems meter fuel, atomize fuel, and （）.
A. create turbulence in the combustion chamber
B. aid in completing cylinder scavenging
C. inject fuel at the proper time
D. minimize fuel penetration into the cylinder
[单项选择]Oxygen corrosion in auxiliary boilers is prevented by treating the boiler feed tank with either sodium （）
A. sulfite or hydrazine
B. sulfite or hygroscopic sulfite
C. bromide or hydrazine
D. bromide or hygroscopic sulfite
[单项选择]Auxiliary boilers are divided into several classifications, one of which is（）
A. fire-tube controlled circulation
B. fire-tube supercritical circulation
C. water-tube natural circulation
D. water-tube express circulation
[单项选择]Auxiliary boilers can be classified as（）
A. water-tube natural circulation boilers
B. fire-tube boilers
C. water-tube forced circulation boilers
D. all of the above
[单项选择]Boilers and cylinders are（）.
A. raw metallic products
B. finished metallic products
C. consumable products
D. Manufactured goods of large Size
[单项选择]The procedures recommended for auxiliary boilers having high salinity include （）.
A. treating with oxygen scavengers
B. securing the boiler and giving it a blowing down
C. increasing the pH
D. reducing the phosphate level
[单项选择]Generating tubes in waste heat boilers are finned to （）.
A. reduce gas flow turbulence
B. prevent exhaust gas corrosion
C. increase the rate of combustion
D. increase the rate of heat transfer
[单项选择]Who is in charge of the auxiliary boilers?（）
A. The chief engineer
B. The second engineer
C. The third engineer
D. The fourth engineer
[单项选择]The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.
A. water
B. oil
C. heat
D. steam
[单项选择]The purpose of designing some waste heat boilers with sinuous fire tubes, is to（）
A. increase exhaust gas velocity through the boiler
B. reduce accumulations of carbon deposits on the heat transfer surfaces
C. eliminate exhaust gas pulsations and noise
D. increase the rate of heat transfer to the waterside
[单项选择]Fusible plugs are installed in fire-tube boilers to （）.
A. provide a means of draining the boiler
B. warn the engineer of low water level
C. cool the crown sheet at high firing rates
D. open the burners electrical firing circuits
[单项选择]Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）
A. a burned out solenoid in the oil supply valve
B. high temperature excess air
C. incorrectly setting the hot-well dump valve
D. an incorrectly positioned burner snubber realy
[单项选择]
When does auxiliary burner of rotary nozzle incinerator begin to work? （）
Ⅰ.hen igniting
Ⅱ.he sludge for dealing with is too much
Ⅲ.efore stopping incinerator
A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
[单项选择]（）is normally responsible for maintaining records of corrections to navigational charts and nautical publications.
A. The chief officer
B. The second officer
C. The third officer
D. The PSC officer
[单项选择]Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.
A. fuel/water separators
B. day tanks
C. injector test stand
D. fuel filters
[单项选择]Maintaining the proper fuel oil temperature will result in （）
A. the elimination of valve wear
B. improved atomization
C. a decrease in cylinder blow-by
D. an increase in cylinder blow-by
[单项选择]
When does auxiliary burner of incinerator put into operation? （）
Ⅰ. start incinerator when it is cold
Ⅱ. the sludge for dealing with is little
Ⅲ. the sludge for dealing with is large
Ⅳ. the water and impurity in sludge are too much
Ⅴ. the temperature in incinerator is low
Ⅵ. dealing with little solid rubbish
A. Ⅰ+Ⅱ+Ⅲ+Ⅴ
B. Ⅰ+Ⅱ+Ⅲ+Ⅳ
C. Ⅰ+Ⅳ+Ⅴ+Ⅵ
D. Ⅰ+Ⅱ+Ⅲ+Ⅵ
