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单选题
Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?（）
A
Excessive cylinder liner
B
water in the fuel system
C
Cracked cylinder liner
D
Leaking lube oil cooler
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单选题Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）A
Proper refrigerant chargeB
Faulty expansion valveC
Insufficient refrigerantD
Solenoid valve stuck open
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单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）A
cold fuel oilB
low fuel oil pressureC
low atomizing steam pressureD
water in the fuel oil
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单选题Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）A
Improper fuel rack positioningB
Lengthy opening of the exhaust valveC
Excessively early injection timingD
Extended light load operation
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单选题Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）A
clogged air filterB
compression strokeC
burned exhaust valvesD
all of the above
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单选题Which of the listed problems could produce a high absolute pressure within a flash type evaporator?（）A
Production of high salinity distillateB
Seawater feed temperature below 165℃C
A leak in the first stage demisterD
A cracked distillate pump vent line
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单选题Which of the problems listed represents the major difficulty encountered with thermal expansion valve operation?（）A
Lube oil passing through the systemB
Moisture or foreign matter collecting at the valve seat and orificeC
Variable spring tension caused by the changing temperatureD
Frost on the liquid line
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单选题For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.A
Class A and class BB
Class B and class CC
Class A and class CD
Class C, class D, and class E
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单选题Which of the listed classes of fire would most likely occur in the engine room of a vessel?（）A
Classes A and BB
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Classes C and DD
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单选题If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）A
Dry chemicalB
HalonC
Low velocity fogD
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Fuel oilB
WoodC
CelluloidD
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单选题If ignited, which of the listed materials would be a class "B" fire?（）A
MagnesiumB
PaperC
WoodD
Diesel Oil
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The reservoir would become vapor boundB
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单选题In which of the areas listed would you expect to find the highest salt concentration in a flash evaporator?（）A
Distiller air ejector cooling mediumB
Saltwater heater dischargeC
First-stage internal feed boxD
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单选题Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?（）A
The pump delivers full capacity when started, but gradually slackens off toan abnormally low flowB
The pump packing gland overheats after short operating periodsC
The motor over-current protective device continually shuts the pump downD
Pounding noises can be heard at the pump suction chest
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单选题In which cases listed below, the class would not being suspended or withdrawn（）A
Annual/Intermediate Surveys not complete within three months of due dateB
Repairs made are not acceptable to classC
Accommodation common toilet flushing device isn’t workingD
Not complying with regulations
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单选题When a fuel injection nozzle overheats, which of the problems listed can be expected?（）A
The fuel metering will varyB
The fuel will explodeC
The cylinder head will crackD
The engine will stop
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单选题A system administrator is trying to troubleshoot company wide email problems that may be related to DNS. Which of the following network tools would be MOST useful to determine if it is a DNS issue？（）A
netstatB
tracertC
nslookupD
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单选题When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?（）A
Advanced ignitionB
Clogged air intakeC
Leaky exhaust valveD
High exhaust pressure
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单选题Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）A
Thermal expansion valve frozen openB
Suction gas heat exchanger bypassedC
Condenser clogged or fouledD
High pressure cutout switch inoperative
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单选题Which of the listed devices would be installed at a control system air pressure reducing station?（）A
Moisture separatorB
Vacuum breakerC
LubricatorD
Non-return valve
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