考题
Which of the following problems is the main source of fuel pump and injection system malfunctions?A.Improper lubricationB.Air in the fuel systemC.Coated fuel linesD.Excessive vibration
考题
The major cause of fuel pump and injection system problems is _____.A.improper adjustmentsB.contaminated fuelC.kinked fuel linesD.excessive engine vibration
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_______can be a direct cause of faulty operation of diesel engine fuel injection nozzles.A.Excessive fuel nozzle holder coolingB.Sediment in the fuel supplyC.Distortion of the fuel spray patternD.Improper atomization of the fuel
考题
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.
考题
Which of the following factors is the MOST likely cause of a power supply fan failure?()
A. Extreme temperature variancesB. Extreme humidity variancesC. Power stability fluctuationsD. Excessive dust accumulation
考题
If a diesel engine turned over freely but failed to start, the cause could be ________.A.water in the fuelB.cold lube oilC.excessive starting air pressureD.excessive fuel pressure
考题
One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?A.Low loading of the cylinderB.Excessive cooling of that pistonC.Sluggish ring action on the pistonD.A mechanical defect in a working part
考题
A Windows workstation is taking an excessive amount of time to load the desktop after login.Which of the following could be causing the issue?()A、BIOS on the system board needs to be updated.B、The power supply is providing insufficient wattage.C、The incorrect video drivers are installed on the computer.D、Too many startup applications are running.
考题
Which of the following bottlenecks would MOST likely cause excessive hard drive activity?()A、Inadequate RAMB、Slow processorC、PCI busD、Excessive network traffic
考题
Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional?()A、DustB、Power SurgeC、Excessive humidityD、High temperatures
考题
Which of the following factors is the MOST likely cause of a power supply fan failure?()A、 Extreme temperature variancesB、 Extreme humidity variancesC、 Power stability fluctuationsD、 Excessive dust accumulation
考题
单选题Which of the following bottlenecks would MOST likely cause excessive hard drive activity?()A
Inadequate RAMB
Slow processorC
PCI busD
Excessive network traffic
考题
单选题Due to excessive water in the fuel, a diesel engine fails to startBefore the engine can be started, the water must be removed from the ().A
fuel pumpsB
cylindersC
fuel strainersD
all of above
考题
单选题Which of the following problems is the main source of fuel pump and injection system malfunctions?()A
Improper lubricationB
Air in the fuel systemC
Coated fuel linesD
Excessive vibration
考题
单选题Which of the following factors is the MOST likely cause of a power supply fan failure?()A
Extreme temperature variancesB
Extreme humidity variancesC
Power stability fluctuationsD
Excessive dust accumulation
考题
单选题If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?()A
Move the fuel control mechanism to the no fuel positionB
Block the fuel supply by closing the master fuel valveC
Shut off the fuel supply and block the flow of intake airD
Relieve all pressure in the fuel system
考题
单选题Which of the following condition is likely to develop if the thermocouple element of a pyrometer becomes coated with excessive amounts of combustion by-products?()A
Indicated exhaust pressure readings will increaseB
Pyrometer responses will be retardedC
Indicated cylinder temperature readings will increaseD
Indicated firing pressure readings will increase
考题
单选题Which of the following conditions can cause excessive lube oil consumption in a diesel engine?()A
Low lube oil temperatureB
Dirty lube oil strainerC
Low lube oil pressureD
High lube oil temperature
考题
单选题Excessive clearances in the main or crank-pin bearings will sometimes be indicated by () before any bearing knock is heard.A
loss of flow in the fuel systemB
loss of pressure in the air systemC
loss of flow in the lubricating systemD
loss of pressure in the lubricating system
考题
单选题Which of the following bottlenecks would MOST likely cause excessive hard drive activity?()A
Inadequate RAMB
Slow processorC
PCI busD
Excessive network traffic
考题
单选题A Windows workstation is taking an excessive amount of time to load the desktop after login.Which of the following could be causing the issue?()A
BIOS on the system board needs to be updated.B
The power supply is providing insufficient wattage.C
The incorrect video drivers are installed on the computer.D
Too many startup applications are running.
考题
单选题Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?()A
Leaking fuel injectorsB
Lower than normal compressionC
Delayed fuel injectionD
All of the above are correct
考题
单选题Which of the following will take place if the clearance of the main bearings are excessive?()A
bearing knocksB
dropping of pressure of LOC
noisesD
all the above
考题
单选题Which of the following may take place if the clearance of the main bearings are excessive?()A
bearing knocksB
dropping of pressure of LOC
noisesD
all the above
考题
单选题Which of the following italicized phrases indicates CAUSE?A
Why don’t you do it for the sake of your friends?B
I wish I could write as well as you.C
For all his efforts, he didn’t get an A.D
Her eyes were red from excessive reading.
考题
单选题To avoid excessive pressures in the fuel oil filling system during bunkering, you should ().A
close the tank filling valves quicklyB
top off all tanks at the same timeC
rill completely all tanks to less than 95% fullD
reduce the loading rate when topping off
考题
单选题Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to ()A
burn excessive amounts of lube oilB
overheat without smokingC
operate with reduce power or stopD
run away without load