更多"Additional heat extraction from the"的相关试题:
[单项选择]Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）
A. natural aspiration
B. masked intake valves
C. air cells
D. scavenging air
[单项选择]The process to remove exhaust gases by blowing in fresh air is called （）.
A. charging
B. supercharging
C. starting
D. scavenging
[单项选择]Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）
A. scavenging
B. forced draft
C. turbo-charging
D. aspiration
[单项选择]The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）
A. pumping action of the piston
B. pressure of the fuel charge
C. vacuum developed in the manifold
D. pressure of the fresh air charge
[单项选择]Scavenging is （） of exhaust gases by blowing in fresh air.
A. the suction
B. the compression
C. the removal
D. the deliver
[单项选择]（） is the removal of exhaust gases by blowing in fresh air.
A. Gas exchange
B. Charging
C. Scavenging
D. Supercharging
[单项选择]The exhaust gases for a new engine should be （） when the engine operates under full load.
A. smoky
B. a little bit dense
C. visible
D. almost invisible
[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]When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?（）
A. CO2
B. Methyl chloride
C. R-22
D. Sulphur dioxide
[单项选择]In a （） boiler the hot gases from the furnace pass through the tubes while the water is on the outside.
A. water-tube
B. fire-tube
C. exhaust gas
D. None of the above is true
[单项选择]（）is a caing used for exhaust pipe from the engines.
A. The funnel
B. The messroom
C. The galley
D. The satellite antenna
[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]An exhaust gas bypass is installed on a waste heat boiler in order to （）.
A. bypass exhaust gas at high loads to prevent excessive back pressure
B. bypass a portion of the exhaust gas at peak loads for better efficiency
C. recycle exhaust gas to the turbocharger
D. minimize moisture condensation in the boiler gas passages at low loads
[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 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]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]The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）
A. latent heat of expansion
B. sensible heat of condensation
C. heat of compression
D. all of the above
[单项选择]The rate of heat transfer from a hot region to a cold region is affected most by the （）.
A. size of the heat sink
B. temperature difference between the regions
C. size of the heat source
D. total heat of the system
[单项选择]A patient suffering from heat exhaustion should be（）.
A. moved to a cool room and told to lie down
B. kept standing and encouraged to walk slowly and continuously
C. given a glass of water and told to return to work after 15 minutes of rest
D. None of the above are correct
