更多"The cylinder liners are made of （） "的相关试题:
[单项选择]Which of the diesel engine cylinder liners listed has internal cooling water passages?（）
A. Internally finned liner
B. Externally finned liner
C. Wet liner
D. Integral water-jacket liner
[单项选择]Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）
A. The chromium will not wear out the piston rings
B. The chromium strengthens the liners in the way of the scavenging air ports
C. Chromium eliminates the need for oil scraper rings
D. Pores in the plating aid in maintaining the lube oil film
[单项选择]The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.
A. correct maneuvering
B. wear
C. working efficiency
D. maintenance
[单项选择]One advantage of dry cylinder liners used in a diesel engine is the（）
A. lower thermal expansion rates than wet liners
B. greater heat transfer rate than wet liners
C. greater wear resistance than wet liners
D. procedure to replace dry liners is simpler than for wet liners
[单项选择]A number of cylinder liners are enclosed in one cast iron casing to form a （）.
A. cylinder cover
B. cylinder block
C. cylinder frame
D. bed-plate
[单项选择]Cylinder liners from older lower powered engines had a uniform wall thickness and the cooling was achieved by circulating cooling water through a space formed between （）.
A. crown and skirt
B. liner and jacket
C. ring and groove
D. jacket and block
[单项选择]The cylinder covers and the liners are bolted together by means of （）.
A. bolts welded into the cylinder head
B. bolts welded into the cylinder frames
C. studs screwed into the cylinder head
D. studs screwed into the cylinder frames
[单项选择]The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）
A. expansion of the combustion gases
B. exhaust and intake valves just closing
C. maximum compression is just being attained
D. fuel injection occurring at that point and combustion begins
[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]（） power is the power developed within the cylinder and can be measured by an engine indicator.
A. The shaft
B. The mechanical
C. The electric
D. The indicated
[单项选择]The cubic inch(or liter) displacement of a cylinder is determined by the diameter of the piston and the （）
A. length of the crankshaft
B. volume of the clearance space
C. weight of piston
D. length of the stroke
[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]Deep-sea liners are（）.
A. ferries
B. passenger liners
C. cruise ships
D. ocean going vessels
