更多"Intake air flow from a diesel engin"的相关试题:
[单项选择]The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）
A. Low compression pressure and high exhaust temperature
B. Low firing pressure and high exhaust temperature
C. Low compression pressure and low exhaust temperature
D. Low firing pressure and low exhaust temperature
[单项选择]Diesel engine air start valve timing is controlled by（）
A. engine operating speed
B. an air manifold
C. a hydraulic distributor
D. individual cams and valve gear
[单项选择]The timing of diesel engine air starting valves is controlled by（）
A. the air start valve timing gears and rods
B. a cylinder check valve
C. individual cams and valve gear
D. an air manifold poppet valve
[单项选择]An indication of a diesel engine air intake being partially clogged, is （）.
A. low firing pressure and low exhaust temperatures
B. low firing pressure and normal exhaust temperatures
C. high firing pressure and low exhaust temperatures
D. high firing pressure and high exhaust temperatures
[单项选择]Diesel engine air start system check valves are opened by （）
A. an air start cam
B. cylinder compression pressure
C. starting air pressure
D. valve springs
[单项选择]As for a diesel engine, lack of combustion air may be due to （）.
A. fouling turbine
B. fuel pump faults
C. lubrication failure
D. excessive cooling
[单项选择]Low compression of diesel engine may result from （）
A. a worn cylinder
B. broken piston rings
C. any of A and B
D. none of the above
[单项选择]
The air supplied to a diesel engine is compressed to （）
(1) provide heat for the ignition of the fuel
(2) decrease injection delay
A. (1) only is correct
B. (2) only is correct
C. both (1) and (2) are correct
D. neither (1) or (2) are correct
[单项选择]Cooling the intake air supplied to a diesel engine will （）.
A. reduce mean effective pressure
B. decrease average compression pressure
C. decrease air charge density
D. increase power output
[单项选择]Air scavenging of a diesel engine cylinder（）
A. blows out the exhaust gases
B. supplies oxygen for combustion
C. cools the valves and cylinder walls
D. all of the above
[单项选择]When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）
A. an obstruction in an cylinder
B. water accumulation in some engine cylinders
C. low starting air pressure
D. low scavenge air pressure
[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]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
[单项选择]A diesel engine piston crown can crack from （）
A. excessive piston to liner clearance
B. excessive dirt beneath the piston crown that reduces heat transfer
C. faulty nozzle spray
D. all of the above
[单项选择]Air in the fuel lines of a diesel engine can cause （）
A. ignition failure
B. oxygen corrosion of the fuel lines
C. the pistons to seize
D. blue smoke
[单项选择]White smoke exhausting from a diesel engine can be caused by （）
A. low combustion temperature
B. a leaking fuel nozzle check valve
C. late fuel injection
D. plugged oil-scraper ring hole
[单项选择]White smoke exhausting from a diesel engine can result from （）
A. high exhaust temperature
B. high lube oil temperature
C. low turbo-charger speed
D. low cooling water temperature
