更多"Forcing the exhaust gases form the "的相关试题:
[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]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]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]The single acting cylinder is the simplest form where pressure is applied to the full area of the piston head to move the load through piston rod extensionThe load causes rod （） when the drive pressure is released.
A. contraction
B. retraction
C. expansion
D. shrinkage
[单项选择]The cylinder head, cylinder liner and （） form the combustion chamber.
A. frame
B. piston
C. crankcase
D. explosion plate
[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]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]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 cylinder liner forming the cylinder wall and the inside of the water jacket is called a（）
A. dry liner
B. wet liner
C. jacket liner
D. corrugated liner
[单项选择]Cracks in cylinder and cylinder covers may （） from unequal heating.
A. make
B. cause
C. result
D. produce
[单项选择]On the top of the cylinder is mounted the cylinder cover which is pressed onto （） of the cylinder liner by means of nuts and studs.
A. the camshaft
B. the flange
C. the ridge
D. the bulge
[单项选择]The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices during （）
A. the upward stroke
B. the downward stroke
C. the power stroke
D. the suction stroke
[单项选择]（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.
A. The fuel oil
B. The lube oil
C. The sea water
D. The fresh water
[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
