更多"If the engine can be started and ma"的相关试题:
[单项选择]If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）
A. early injection timing
B. worn orifices in the injection nozzles
C. worn or scored cylinder liners
D. using a fuel with too low of a cetane number
[单项选择]The diesel engine must be started before it can run by it self For this purpose （） has to be used.
A. a starting system
B. the starting air
C. a starting operation
D. A, B and C
[单项选择]Combustion knock occurring in a diesel engine can be caused by （）
A. low coolant temperature
B. insufficient fuel
C. high ambient temperature
D. carbon buildup on the injector tips
[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
[单项选择]Poor combustion in a diesel engine can be caused by （）.
A. high compression pressure
B. low intake air temperature
C. low exhaust pressure
D. high scavenge air temperature
[单项选择]Performance of a turbocharged engine can be improved by（）
A. decreasing the amount of valve overlap
B. preheating the air intake
C. after-cooling the intake air
D. preheating light fuel
[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]Low compression pressure in a diesel engine can be caused by（）
A. improperly seating intake valves
B. leaking cylinder liner seal rings
C. late fuel injection timing
D. carbon deposits on the piston
[单项选择]Late fuel oil injection in a diesel engine can result in （）
A. fuel knock
B. increased power
C. low compression pressure
D. high exhaust temperature
[单项选择]The indicated power of an engine can be obtained by taking the （）.
A. precautions
B. rpm
C. indicator cards
D. B and C
[单项选择]A dark exhaust from a running diesel engine can be caused by （）
A. late ignition
B. water in the fuel
C. high compression temperature
D. starting valve stuck open
[单项选择]Low compression in a diesel engine can be caused by （）
A. clogged coolant passages
B. a leaking cylinder head gasket
C. low fuel oil pressure
D. worn or broken cylinder liner sealing rings
[单项选择]Worn main bearings in a diesel engine can result in （）
A. decreased compression pressure
B. increased lube oil pressure
C. lower lube oil temperature
D. excessive leakage past the piston rings
[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]Sudden unloading of a diesel engine can cause（）.
A. decreased fuel efficiency
B. increased exhaust temperature
C. black smoke
D. overspeed trip
[单项选择]The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.
A. fuel treatment
B. fuel combustion
C. fuel injection
D. fuel separating
