更多"It is very necessary that each cyli"的相关试题:
[单项选择]It is very necessary that each cylinder （） before the charged air is compressed.
A. is scavenged
B. has been scavenged
C. be scavenged
D. was scavenged
[单项选择]It is very important that each cylinder should be （） scavenged before the charged air is compressed.
A. well
B. good
C. excellent
D. respectively
[单项选择]Each cylinder in a two stroke cycle engine experiences combustion（）.
A. once each crankshaft revolution
B. twice each crankshaft revolution
C. every other crankshaft revolution
D. every fourth stroke
[单项选择]The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.
A. BDC
B. TDC
C. BBDC
D. ATDC
[单项选择]Each cylinder liner on the marine medium speed engines （）.
A. is usually cooled by sea water
B. can be replaced when worn out
C. is in direct contact with the water in the bore of the cylinder
D. can t expand when heated
[单项选择]Each cylinder has one starting valve which is usually opened by air pressure and closed by （）
A. nuts and bolts
B. new joints
C. spring force
D. sealing rings
[单项选择]In each cylinder cover is a large central opening for mounting （）
A. the indicating cock
B. the starting valve
C. air inlet valve
D. the exhaust valve
[单项选择]There is an injection pump for each cylinder, which is usually operated once every cycle by （） on the camshaft.
A. a gear
B. a cam
C. a rod
D. a miler
[单项选择]In each cylinder cover there are two or three holes for （）
A. the exhaust valves
B. the fuel valves
C. indicator cocks
D. the fuel pumps
[单项选择]The bore of each cylinder is formed in a liner which can be （） when worn out.
A. welded
B. replaced
C. drilled again
D. bored
[单项选择]Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.
A. cylinder liner
B. coupling flange
C. cylinder cover
D. piston crown
[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]The cylinder head, cylinder liner and （） form the combustion chamber.
A. frame
B. piston
C. crankcase
D. explosion plate
[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]To counteract these undesirable effects cylinder oils usually contain additives formulated to impart a high degree of （） and detergency.
A. salinity
B. alkalinity
C. acid
D. sanitary
[单项选择]Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during （）.
A. the power stroke
B. the compression stroke
C. low load operation only
D. periods of standby
