更多"Which of the following problems may"的相关试题:
[单项选择]Which of the following problems may occur when using fuel oil with a high sulphur content?（）
A. Injection lag
B. Lube oil dilution
C. Pre-ignition
D. Corrosion
[单项选择]Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?（）
A. The amount of fuel injected will be increased
B. The start of injection will be retarded
C. The nozzle will permit fuel to dribble
D. The spray pattern will be distorted
[单项选择]Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver?（）
A. Corrosion and eventual failure of the tank
B. Gumming of the tank relief valves
C. Immediate failure of components downstream of the compressed air system
D. Boiling of the water oil mixture as pressure is reduced
[单项选择]Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）
A. The reservoir would become vapor bound
B. The valve would be placed in hydraulic lock
C. The spring loaded relief ports would open
D. The buffering chambers would be unable to function
[单项选择]Which of the following problems will occur if a disk-type centrifugal lube oil purifier is not properly primed prior to admitting oil flow to the bowl?（）
A. Contamination of the lube oil by emulsification will result
B. The lube oil will not be subjected to the proper centrifugal force
C. The lube oil will overheat and flash
D. Oil will discharge from the heavy phase discharge port and be wasted
[单项选择]Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?（）
A. Worn intake valve guides
B. Pitted pre-combustion chambers
C. Loose valve tappets
D. High exhaust back pressure
[单项选择]Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）
A. Defective temperature controls in the system
B. Cavitation in the cooling water pump
C. Opened vent in the cooling system
D. Restricted water passages in the engine
[单项选择]Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?（）
A. Faulty turbocharger turbine diffuser ring
B. Faulty turbocharger compressor ring
C. Insufficient cooling water flow
D. Clogged air intake filters
[单项选择]Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?（）
A. Reduce engine speed to idle before removing the filter
B. Soak the dirty filter in kerosene only
C. Blow out the air inlet with compressed air
D. Cover the air inlet after removing the filter
[单项选择]Which of the following problems could cause air to blow out through the inlet air filter of a running compressor?（）
A. Excessive compression in the cylinder
B. A broken intake valve
C. A dirty inlet filter element
D. An improperly adjusted discharge valve
[单项选择]Which of the following problems would be the probable cause for the faulty operation of a reciprocating air compressor suction valve?（）
A. Carbon build up in the piston ring belt
B. Faulty operation of a cylinder un-loader
C. Compressor operation in an area of high relative humidity
D. Lifting of intercooler rebel valve
[单项选择]Which of the following problems is the main source of fuel pump and injection system malfunctions?（）
A. Improper lubrication
B. Air in the fuel system
C. Coated fuel lines
D. Excessive vibration
[单项选择]Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
A. A shortage of liquid refrigerant
B. Excessive frost on the evaporator
C. Excessive condenser cooling water
D. Insufficient condenser cooling water flow
[单项选择]Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? （）
A. Hydraulic stress and distortion will develop
B. Hot spots will develop
C. Fuel oil viscosity will increased
D. An increase in trapped deposits of scale and dirt
[单项选择]Which person may command a lifeboat in ocean service?（）
A. Licensed deck officer
B. Able seaman
C. Certificated person
D. All of the above
[单项选择]Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
A. Loading
B. Discharging
C. Crude oil washing
D. Steaming tanks
[单项选择]Which vessel may show three lights in a vertical line，the top and bottom being red and the middle being white? （）
A. A vessel engaged in diving operations
B. A pilot vessel
C. A vessel trawling
D. All of the above
[单项选择]Which system may be useful for messages，such as local storm warnings or a shore-to-ship distress alert，for which it is inappropriate to alert all ships in the satellite coverage area?（）
A. NAVTEX
B. EGC
C. AMVER
D. DSC
