
汽車—學術科題庫1-50

Quiz
•
Other
•
9th Grade
•
Hard
Used 2+ times
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50 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
使用低揮發性汽油
使用高揮發性汽油
汽油比重太輕
汽油比重太重
Answer explanation
揮發性較低之汽油易凝結於汽缸壁而漏入曲軸箱中沖淡機油
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
壓力升高
溫度升高
壓力降低
壓力不變
Answer explanation
轉子頂部間隙變大,油膜不易建立,使得送油壓力降低
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
滲入水份
滲入汽油
滲入機油
機件嚴重磨損
Answer explanation
潤滑系統保養及檢查:正常使用之車輛每五千公里更換機油,每一萬公里更換機油濾清器;若車輛不常使用則建議每半年更換,如此才能確保油質良好檢查油量時(冷引擎或熄火後3~5分鐘於平坦地面):將機油尺抽出查看(尺之末端有記號:二個小洞或二條橫線或二側有凹痕,因設計而異),油面高度在上、下限之中間稍高即可,不必刻意加至上限機油尺抽出時應保持原抽出方向(末端朝下,勿將尺倒置),否則機油倒流會誤認油量過多檢查油質時,若發現油中有白色乳狀物則表示機油中混有水份(乳化作用),必須更換機油並徹底檢查原因,否則會對引擎造成傷害;在每次檢查油量時,如果發現油面高度有遞減情形則須檢查是否有不正常洩漏?若有,可循油漬往高處查看以找出確實洩漏處(洩漏之機油乾涸後不像水乾後無痕跡,一定會留下油漬);若無洩漏則可能為引擎磨損(磨損之引擎運轉時會因燃燒機油而使得廢氣中含有藍白色煙霧);用手指沾少許附著於尺末端之機油並輕輕搓揉,可檢查出油中雜質是否過多?按時更換機油及檢查油量、油質是潤滑系統保養最重要的工作,必須落實才能確保引擎作用正常
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
分流式
全流式
旁通式
壓力式
Answer explanation
機油之過濾方式有以下三種:(1)全流式:機油濾清器裝在油泵與主油道之間,流入主油道之機油都必須經過濾清器;此式濾清器必須裝旁通閥在機油泵內或濾清器內,當濾清器阻塞機油壓力昇高時,機油可以推開旁通閥不經濾清器直接到主油道潤滑,確保潤滑系統作用正常此式潤滑效果較確實(2)旁通式:機油泵泵出的機油分為兩部分;一部分經濾清器濾清後回到油底殼,另一部分則流到主油道潤滑各機件(3)分流式:機油泵泵出的機油分為兩部分;一部分經濾清器濾清後與另一部分未濾清之機油一起流到主油道潤滑各機件
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
增加活塞環與汽缸間隙,使阻力更低
幫助活塞環與汽缸之氣密,減少漏氣
較不會產生爆震
容易蒸發,引擎溫度較低
Answer explanation
機油的功用:潤滑、冷卻、清潔、密封、防銹、防蝕、減震、液壓;機油產生密封作用最顯著的機件部位是活塞環與汽缸壁間之間隙,防止壓縮後之高壓氣體及燃燒後之膨脹氣體漏至曲軸箱中,不僅損失動力,也會沖淡曲軸箱中機油
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
避免潤滑不足
防止機油濾清器堵塞
確保最小之壓力
避免過高之機油壓力
Answer explanation
機油之過濾方式有以下三種:(1)全流式:機油濾清器裝在油泵與主油道之間,流入主油道之機油都必須經過濾清器;此式濾清器必須裝旁通閥在機油泵內或濾清器內,當濾清器阻塞機油壓力昇高時,機油可以推開旁通閥不經濾清器直接到主油道潤滑,確保潤滑系統作用正常此式潤滑效果較確實(2)旁通式:機油泵泵出的機油分為兩部分;一部分經濾清器濾清後回到油底殼,另一部分則流到主油道潤滑各機件(3)分流式:機油泵泵出的機油分為兩部分;一部分經濾清器濾清後與另一部分未濾清之機油一起流到主油道潤滑各機件
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