更多"The process to remove exhaust gases"的相关试题:
[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]Additional heat extraction from the exhaust gases can be effected by adding an () section to the unit in plants.
A. air cooler
B. economizer
C. injector
D. air blower
[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]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]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]The process of loop scavenge is that the exhaust will be via ports () the air ports and controlled by the same piston.
A. behind
B. far from
C. adjacent to
D. in front of
[单项选择]A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? ()
A. In the lower level of the pumproom
B. In the middle level of the pumproom
C. In the upper level of the pumproom
D. On the deck outside the pumproom
[单项选择]Which of the following gases represents the greatest threat to personnel safety in an engine room where the exhaust is leaking from a diesel engine?()
A. Carbon dioxide
B. Carbon monoxide
C. Carbon trioxide
D. Hydrogen sulfide
[单项选择]High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by ().
A. engine overload
B. low combustion temperature
C. plugged fuel nozzle holes
D. excessive compression pressure
[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]Exhaust pyrometer readings provide an indication of the ()
A. effectiveness of water-cooled exhaust elbows
B. distribution of the load between engine cylinders
C. amount of fuel penetration into the engine cylinders
D. indicated horsepower of the engine cylinders
[单项选择]The two most common gases used in pneumatic system are ()
A. compressed air and nitrogen
B. helium and nitrogen
C. oxygen and hydrogen
D. oxygen and acetylene
[单项选择]Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by ()
A. cylinder valves
B. compression rings
C. piston skirts
D. oil rings
[单项选择]The rising of the exhaust temperature in manifold pipe may NOT result from ().
A. too great a loading
B. fouled turbocharger
C. bad combustion
D. excessive air
[单项选择]
The exhaust valve opens before bottom dead center in a four stroke engine to()
Ⅰ.allow for blow down
Ⅱ.Reduce pumping losses
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ