更多"The normal color of the exhaust gas"的相关试题:
[单项选择]Diesel engine exhaust gas temperatures can be used to determine individual cylinder （）.
A. performance
B. horsepower output
C. fuel consumption
D. scavenge effect
[单项选择]The exhaust pipe must be gas tight throughout its entire length otherwise（）.
A. bilge water may enter the exhaust pipe
B. entry of air may cause vapor lock
C. carbon monoxide may enter the interior of the vessel
D. the joint gaskets may be blown
[单项选择]The diesel engine exhaust gas bypass, as fitted with some waste heat boilers, is installed to （）
A. prevent engine back pressure at heavy loads
B. increase total engine efficiency at low loads
C. prevent boiler corrosion at low engine loads
D. improve engine fuel consumption at any load
[单项选择]The color of the exhaust from a diesel engine should be （）
A. clear
B. hazy light brown
C. hazy light blue
D. hazy light grey
[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]Exhaust pipes for separate diesel engines can be combined only when （）
A. space limitations prevent separately run pipes
B. the engines are small auxiliary units
C. they are arranged to prevent gas backflow to each engine
D. a waste heat boiler is installed
[单项选择]The exhaust system of a diesel engine is usually designed to remove exhaust gases and to （）
A. provide exhaust back pressure
B. prevent exhaust smoke emissions
C. power a reciprocating supercharger
D. muffle exhaust gas noise
[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]The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the （）
A. reciprocating motion of exhaust valves
B. rotary motion of the camshaft
C. reciprocating motion of the piston
D. developed differential
[单项选择]Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）
A. increase back pressure during the exhaust process
B. facilitate periodic replacement of the valves
C. reduce the pumping loss associated with scavenging
D. reduce tension on valve springs
[单项选择]The exhaust system for a turbocharged diesel engine functions to （）
A. power the after-coolers
B. power the turbocharger
C. reduce the cylinder scavenge effect
D. cool the turbocharger
[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]After passing through the turbine the exhaust gas is conducted out into the（）.
A. intercooler
B. compressor
C. cylinder
D. open air
[单项选择]Exhaust gas pyrometers are useful for（）
A. detecting faulty combustion in individual cylinders
B. adjusting fuel racks to maintain equal loading between cylinders
C. adjusting the load limit setting of the governor at idle conditions
D. calculating engine horsepower
[单项选择]When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
A. During operation at low speed
B. During operation at rated speed, but low power output
C. During acceleration
D. All of the above
[单项选择]Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.
A. scavenging
B. starting
C. cooling
D. blowing
[单项选择]By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
A. tachometer
B. pyrometer
C. dynamometer
D. calorimeter
[单项选择]Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to （）
A. provide added wear protection against today’s corrosive quality of fuel
B. increase overall valve strength due to the high gas pressures
C. assist in dissipating heat due to the extreme operating temperatures
D. reduce the overall weight of the valve thus helping eliminate valve spring surge and hammering
