7.最普遍的碳鹵素冷媒（如 R-11、R-12 等）需以新冷媒（如 HFC-134a 等）取代；碳鹵素冷媒禁用之原因為何？ (A)具有毒性及刺激性 (B)具可燃性及爆炸性 (C) 會破壞臭氧層 (D)易與金屬發生化學作用

30.The ignition delay associated with fuels of low ignition quality results in a late and more explosive start to the combustion period, which results in higher peak pressures and consequent rough and noisy operation. Therefore,＿＿＿＿＿＿＿ . (A)the ignition delay could increase the mean effective pressure of cycle (B) the more explosive start to the combustion period due to ignition delay could generate the higher peak pressure (C)the ignition delay associated with fuels of low ignition quality is beneficial for engine performance as it results in higher peak pressures (D)the ignition delay associated with fuels of low ignition quality could alleviate the noise generation

7.最普遍的碳鹵素冷媒（如 R-11、R-12 等）需以新冷媒（如 HFC-134a 等）取代；碳鹵素冷媒禁用之原因為何？
(A)具有毒性及刺激性
(B)具可燃性及爆炸性
(C) 會破壞臭氧層
(D)易與金屬發生化學作用

相關試題

相關試卷

7.最普遍的碳鹵素冷媒（如 R-11、R-12 等）需以新冷媒（如 HFC-134a 等）取代；碳鹵素 冷媒禁用之原因為何？ (A)具有毒性及刺激性 (B)具可燃性及爆炸性 (C) 會破壞臭氧層 (D)易與金屬發生化學作用

相關試題

相關試卷

7.最普遍的碳鹵素冷媒（如 R-11、R-12 等）需以新冷媒（如 HFC-134a 等）取代；碳鹵素冷媒禁用之原因為何？
(A)具有毒性及刺激性
(B)具可燃性及爆炸性
(C) 會破壞臭氧層
(D)易與金屬發生化學作用