更多"What does a pyrometer measure on a "的相关试题:
[单项选择]In the construction of a diesel engine, what is the purpose of end plates?（）
A. To provide accessibility to the cylinder liners
B. To add stability to the engine block
C. To add rigidity to the block and a surface for attaching other parts
D. To make a surface for the base
[单项选择]Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A. low oil pressure
B. high coolant pressure
C. leaking fuel injector
D. cracked cylinder head or liner
[单项选择]What is one effect of running a diesel engine at too cool a temperature? （）
A. Buildup of sludge in the lubricating system
B. Excessive fuel consumption
C. Severe heat stresses on mechanical parts
D. Foaming of the lubricating oil
[单项选择]Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
A. open the bypass line
B. cut in the lube oil cooler
C. pressurize the lube oil system
D. top off the expansion tank
[单项选择]A diesel engine is similar to a gasoline engine except that the former has no （）.
A. cross-head
B. cylinder
C. connecting rod
D. spark plug
[单项选择]Diesel engine crankshaft deflection readings are generally taken at four crank positionsGood engineering practice requires the deflection gage or indicator to be（）
A. placed as near the crankpin axis as possible
B. removed each time the crankshaft is repositioned
C. left in place for all four readings
D. reset to zero for all four readings
[单项选择]An operating turbocharged diesel engine that suddenly loses power, is due to a/an（）
A. restricted turbocharger air intake
B. oil leak into the turbocharger
C. dribbling injector
D. low fuel viscosity
[单项选择]Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）
A. higher speed required
B. flywheel-effect
C. lower starting temperatures
D. higher compression pressures
[单项选择]Theoretical perfect combustion in a diesel engine yields by-products of （）.
A. aldehydes and carbon dioxide
B. water vapor and carbon monoxide
C. nitrogen and carbon monoxide
D. water vapor and carbon dioxide
[单项选择]Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.
A. respectable
B. respectful
C. respective
D. respectively
[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]The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A. principle
B. principal
C. cause
D. case
[单项选择]（） the engines, the diesel engine is（） used engine on board.
A. Between；more commonly
B. Among；the most commonly
C. Between；not more commonly
D. Among；not the most commonly
[单项选择]Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.
A. operated manually once an hour
B. operated until the engine has started
C. placed into operation only at maximum load
D. adjustable to meet lubrication requirements
[单项选择]Diesel engine mufflers accomplish noise reduction by （）
A. reducing exhaust gas velocity
B. increasing the frequency of gas vibration
C. the use of long head pipes
D. the use of zinc electrodes
[单项选择]Intake air flow from a diesel engine turbocharger is directly proportional to engine（）
A. exhaust gas pressure
B. exhaust gas temperature
C. speed
D. load
[单项选择]Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）
A. residual carbon deposits
B. lube oil viscosity breakdown
C. uneven heat expansion of the rings
D. uneven heat expansion of the piston
[单项选择]Which of the diesel engine cylinder liners listed has internal cooling water passages?（）
A. Internally finned liner
B. Externally finned liner
C. Wet liner
D. Integral water-jacket liner
[单项选择]A smoking exhaust from an operating diesel engine could be caused by （）
A. low sulfur content in the fuel
B. a loose injector inlet connection
C. late fuel injection
D. high injection pressure
