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单选题
Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）
A
An increased air temperature differential between the cooler inlet and outlet
B
A decrease in the air pressure differential across the cooler
C
Excessive condensate forming in the air box
D
A decrease in the air temperature differential between the cooler inlet and outlet
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更多 “单选题Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）A An increased air temperature differential between the cooler inlet and outletB A decrease in the air pressure differential across the coolerC Excessive condensate forming in the air boxD A decrease in the air temperature differential between the cooler inlet and outlet” 相关考题
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On which side shall we get alongside the wharf?（）A、On port side .B、On right side.C、On left side.D、On deck.
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单选题A ship’s bottom is given a coating of （）which contains poison.A
varnishB
anti-fouling paintC
boottopping paintD
primer
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单选题Air blowing from the intake air filter of an operating air compressor indicates （）.A
broken inlet valvesB
broken discharge valvesC
pulsations in the air distribution systemD
overloading of the air distribution system
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Serrated range ringsB
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increasedC
fixedD
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has a crown-faceB
exceeds wear limits through normal wearC
has excessive blow-byD
is in good condition
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inefficient coolingB
a leaking air start valveC
a clogged drain valveD
a leaking air bottle
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单选题Exhaust temperature increases in all cylinders, the possible cause may be（） (1) increased scavenging air temperature (2) air in fuel pumps and fuel valves (3) fouling of air and gas passagesA
(1)+(2)B
(1)+(3)C
(2)+(3)D
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单选题Which statement is TRUE concerning the gooseneck（）.A
It is a sailing maneuver which brings the vessel's head through the windB
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单选题If over a period of weeks the air-box pressure of a turbo-charged, diesel engine, operating at full load, appears to be dropping off, the cause can be （）.A
open air-box drainsB
loss of cooling water to the diffuserC
gradual fouling of the air filtersD
improperly timed exhaust valves
考题
单选题In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）A
DifferentialB
TrunkC
BarrelD
Valve-in-head
考题
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on an even keelB
listing about 1° to the side the light is displayed onC
listing over 5° With the light displayed on the high sideD
listing，and the chutes should be directed to the side where the light is displayed
考题
单选题Which condition is necessary for a substance to burn?（）A
The temperature of the substance must be equal to or above its fire pointB
The air must contain oxygen in sufficient quantityC
The mixture of vapors with air must be within the explosive rangeD
All of the above
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central air condition systemB
high velocity systemC
low velocity systemD
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dirty delivery ductsB
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the fouling filtersD
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slight alkalinityC
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excessive acidity
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单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）A
noise coming from that air starting valveB
continuous operation of the starting air compressorC
zero air pressure in the air starting systemD
overheated starting air pipe to the cylinder head
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单选题In a diesel engine cooling water system, a pH of 60 indicates a/an （）.A
slightly acidic conditionB
slightly alkaline conditionC
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单选题Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.A
A backing windB
A veering windC
A northerD
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单选题A dazzling white burner flame in the boiler furnace indicates （）.A
no combustionB
deposits in the fuelC
excessive air in the fuelD
cold fuel oil
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