更多"A number of cylinder liners are enc"的相关试题:
[单项选择]The （） chamber is enclosed between the cylinder head and piston.
A. lubrication
B. injection
C. cooling
D. combustion
[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]Deep-sea liners are（）.
A. ferries
B. passenger liners
C. cruise ships
D. ocean going vessels
[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]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 use of liners in riveted construction is eliminated by using（）.
A. lapped construction
B. strapped construction
C. joggled construction
D. belted construction
[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]The cylinder liners are made of （） and the cylinder surfaces are sometimes chromium-plated.
A. steel
B. copper
C. cast iron
D. stainless steel
[单项选择]The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.
A. the scavenging air
B. the exhaust gases
C. the mixed air
D. the spray oil
[单项选择]A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.
A. at anchor
B. towing a submerged object
C. being overtaken in a narrow channel
D. in distress
[单项选择]A signal of one prolonged，one short，one prolonged，and one short blast，in that order is given by a vessel（）.
A. engaged on pilotage duty
B. in distress
C. at anchor
D. being overtaken in a narrow channel
[单项选择]ACL命令acl[number]acl-number[match-order{auto|config}]，其中acl-number用于指定访问控制列表的编号，基本访问控制列表的acl-number取值范围是（）
A. 1000~3999
B. 2000~2999
C. 3000~3999
D. 0~1000
[单项选择]PKI架构通常分为CA层次、CA网、单CA和（）
A. 双CA
B. 树CA
C. 桥CA
D. 链CA
[单项选择]An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）
A. 0°
B. 10°
C. 22.5°
D. None of the above
[简答题]在ROAM NUMBER分析中，从HLR返回的ROAM NUMBER为INT，到为何ROAM NUMBER中TREE50的分析为NAT？
