
112-2 熱工
Authored by 雯華林 雯華林
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University
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35 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
熱機之熱效率定義為:
(A) 所作的功與所加入之電能的比值
(B) 所作的功與所加入之熱能的比值
(C) 所作的功與所加入之燃料質量的比值
(D) 所產生之電能與所加用之熱的比值
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某一氣體的壓力(P)與體積(V)的關係式為PVn=常數,則當n=Cp0/Cv0(此氣體定壓比熱/此氣體定容比熱),則此氣體在什麼的狀態過程:
(A)等壓過程
(B)等溫過程
(C)等熵過程
(D)等容過程
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在冷媒特性曲線圖中之飽和區域,冷媒的形態為:
(A)氣態
(B)液態
(C)液氣混合態
(D)固態
Answer explanation
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
標準狀態下(0°C, 1大氣壓)體積為1m3之理想氣體壓縮為30°C,30大氣壓之狀態,則其體積變為
(A)0.027 m3
(B)0.037 m3
(C)0.047 m3
(D)0.057 m3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
問目前市面上的轎車內之冷氣系統所使用的冷媒為:
(A)HFC-407C
(B)HFC-410A
(C)HFC-134A
(D)HFC-134a
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
試問一般壓縮機所需之功,可用下列壓縮過程壓力(P)及體積(v)之變化估算
(A) ∫ Pdv
(B) ∫ vdP
(C) ∫ dP/v
(D) ∫ dv/P
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有一台空氣壓縮機,其壓力P及比容v之變化,約可用Pv1.4=常數表示,其試問此過程為
(A)等溫過程
(B)等壓過程
(C)等容過程
(D)等熵過程
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