更多"High exhaust temperature and black "的相关试题:
[单项选择]Black smoke exhausting from a diesel engine indicates（）
A. proper fuel injection
B. water in the fuel
C. incomplete combustion
D. burning of lube oil
[单项选择]Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）
A. water in the fuel
B. insufficient fuel for combustion
C. clogged air intake passages
D. burning lubricating oil
[单项选择]A burner responsible for producing black smoke in an automatic auxiliary boiler, would be caused by a （）
A. defective solenoid valve
B. dirty fuel nozzle
C. grounded high tension lead
D. faulty ignition cable connector
[单项选择]Black smoke coming from a boiler can be caused by （）.
A. low water level
B. low oil pressure
C. excessively high fuel pressure
D. an improper air/fuel ratio
[单项选择]A diesel engine emits blue exhaust smoke as a result of（）
A. cold intake air
B. excessive compression pressure
C. excessive cylinder lubrication
D. a light load
[单项选择]If exhaust temperatures are too high, you should check （）.
A. air cooler
B. turbocharger
C. charge air
D. A+B+C
[单项选择]White smoke issuing from the exhaust of an auxiliary diesel engine valve opening （）
A. the engine is overloaded
B. the engine is cold
C. there is too much lube oil in the cylinders
D. the turbocharger is fouled
[单项选择]High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an（）
A. inoperative turbocharger
B. inadequate fuel supply
C. overload on one cylinder
D. unequal load distribution
[单项选择]High firing pressures and a low exhaust temperature in a diesel engine may result from （）.
A. decreased piston to cylinder head clearance
B. increased exhaust system back pressure
C. early fuel injection timing
D. low scavenge air temperature
[单项选择]High exhaust back pressure will result in an increase in （）
A. turbocharger efficiency
B. engine power output
C. carbon deposits on fuel injectors
D. cylinder scavenging
[单项选择]Pyrometers commonly found on diesel engine exhaust systems, consist of（）
A. pyrostats and a voltmeter
B. a gas-filled bellows, a tube and a pressure gauge
C. thermocouples and a voltmeter
D. ammeters and thermocouples
[单项选择]Additional heat extraction from the exhaust gases can be effected by adding an （） section to the unit in plants.
A. air cooler
B. economizer
C. injector
D. air blower
[单项选择]Exhaust pyrometer readings provide an indication of the （）
A. effectiveness of water-cooled exhaust elbows
B. distribution of the load between engine cylinders
C. amount of fuel penetration into the engine cylinders
D. indicated horsepower of the engine cylinders
[单项选择]The mechanical exhaust valve operation system is replaced by（）in an electronic controlled ME engine.
A. a system with a Hydraulic Power Supply (HPS) unit
B. a system with roller guides for exhaust valves
C. a system with an electronically controlled Alpha Lubricator
D. a system directly powered by electric motor
[单项选择]The rising of the exhaust temperature in manifold pipe may NOT result from （）.
A. too great a loading
B. fouled turbocharger
C. bad combustion
D. excessive air
[单项选择]
The exhaust valve opens before bottom dead center in a four stroke engine to（）
Ⅰ.allow for blow down
Ⅱ.Reduce pumping losses
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
