Defective air cooler in a diesel engine will lead to ().
A . smoky exhaust
B . starting failure
C . overload
D . over speed
相似题目
-
When used in conjunction with a turbocharger, the main function of an after-cooler is to ()
A . increase the density of the cylinder air charge
B . prevent turbocharger overheating
C . liminate the need for a pre-cooler
D . remove moisture from air compressed by the turbocharger
-
On what do you depend having the air cooler of main engine chemically washed?()
A . increased air pressure differenced before and aft air cooler
B . reduced exhaust temperature in all cylinders
C . reduced temperature difference between water inlet and outlet
D . both A and C
-
Air bubbles in a hydraulic governor can cause ()
A . sluggish response
B . speed droop variations
C . isochronous governing
D . sensitivity increase
-
In a central cooling system, used in some modem ships, sea water is supplied to cool ()which will circulate to other individual cooler, greatly reducing the corrosion problems.
A . fresh water
B . sea water
C . cooling oil
D . emulsio
-
The scavenge air receiver is of a simplified and modular design with integral non-return flaps, hanging cooler and two auxiliary air blowers()
A . dozens
B . parcels
C . bundles
D . gallo
-
In an oil cooler circulated by sea water, the oil is at a larger pressure the result being that any leak in the cooler will mean a loss of ().
A . oil
B . sea water
C . refrigerant
D . fresh water
-
Defective timing gear in a diesel engine may lead to ().
A . smoky exhaust
B . starting failure
C . overload
D . over speed
-
In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of ().
A . oil
B . sea water
C . air
D . fresh water
-
Compared to a low pressure system,generally the air in a high is().
A . warmer,less dense,and less stable
B . cool,more dense,and drier
C . muggy and cloudy
D . extremely moist with high relative humidity
-
With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to ().
A . allow filtration of less viscous oil
B . decrease the pressure drop across the filter
C . improve overall filtration
D . all of the above
-
What is the function of the after-cooler installed in the diesel engine air intakes system?()
A . Decrease the air density
B . Increase the exhaust temperature
C . Decrease the lube oil temperature
D . Increase the air density
-
The fresh air coming in through the inner air ports, is compressed by() to a higher pressure.
A . the cylinder head
B . the cross-head
C . the moving piston
D . the stationary pisto
-
Condensate must be drained from the intercooler and after-coolers of an air compressor because ().
A . the cooling effect of the condensate reduces the compressors efficiency
B . a danger of explosion exists whenever water is present in a compressor
C . water causes erratic operation of pneumatic components
D . the volumetric capacity of the first stage is reduced if water remai
-
A defective injector nozzle in a propulsion diesel engine can cause()
A . engine power losses
B . smoking due to unburned fuel
C . high exhaust temperature readings
D . all of the above
-
The efficiency of turbocharge system is increased by fitting a charge air cooler () the compressor.
A . inside
B . before
C . after
D . against
-
The air charge leaving an intercooler, or after-cooler of an air compressor can be expected to be ().
A、superheated
B、super-cooled
C、at or below the dew point
D、All of the above
-
Defective governor in a diesel engine may lead to ().
A . smoky exhaust
B . starting failure
C . ignition relay
D . over speed
-
A restricted air intake to a diesel engine may result in the engine ().
A . failing to reach rated speed
B . knocking under maximum load
C . hunting or surging under light load
D . overspeeding and running away
-
When operating the air supply system in a covered lifeboat the().
A . fuel supply valve should be closed
B . hatches,doors,and oar ports should be closed
C . air cylinder shut-off valve should be closed
D . engine should be shut off
-
When the air in a certain space is squeezed to occupy a smaller space, the air is said to be ______.
A.commenced
B.compressed
C.compromised
D.compensated
-
In international air cargo transportation, a freightforwarder offering a consolidation service will issue its own air waybill.Thisis called().
A.MAWB
B.HAWB
C.IATA
D.TACT
-
翻译:Yet there was a bigger movement in the air by 1750.
-
They made a fire in the open air and cooked a meal over it. ______ was made in the open air and a meal ______ over it.