[{"data":1,"prerenderedAt":61},["ShallowReactive",2],{"q-105170-arch_environment-5":3},{"question":4,"neighbors":26,"sameNumber":45,"prev":34,"next":37},{"id":5,"classKey":6,"session":7,"year":8,"subject":9,"number":10,"groupStem":11,"ownStem":12,"stem":12,"options":13,"answer":18,"answerKind":20,"answerS":11,"answerNote":11,"images":21,"explanation":22,"withheld":11,"deepChars":23,"freq":24,"indexable":25},"arch-105170-801-0104-005","architect","105170",105,"建築環境控制",5,null,"某空氣狀態的溫濕度為 24℃、50%，若飽和絕對濕度為 19 g\u002Fkg'，該空氣塊的絕對濕度為多少 g\u002Fkg'？",{"A":14,"B":15,"C":16,"D":17},"10.4","9.5","12","4.56",[19],"B","single",[],"本題考點：相對濕度與絕對濕度的換算。在一般建築環境控制的近似計算中，空氣的絕對濕度可以用「相對濕度 × 同溫度下的飽和絕對濕度」求得。\n【正解理由】相對濕度 50% 表示這塊空氣所含的水蒸氣量，約為同溫度（24℃）下最多能容納水蒸氣量的一半。題目已給出 24℃ 時的飽和絕對濕度為 19 g\u002Fkg'（每公斤乾空氣所含水蒸氣的克數），因此絕對濕度 = 19 g\u002Fkg' × 50% = 9.5 g\u002Fkg'，與選項 (B) 相符，故選 B。\n【逐項排除】\n(A) 10.4：不符合題目所問。相對濕度 50% 時，絕對濕度應為飽和值 19 g\u002Fkg' 的一半，即 9.5 g\u002Fkg'；10.4 已超過飽和值的一半，對應的相對濕度會高於題目所給的 50%。\n(B) 9.5：符合題目所問。以飽和絕對濕度 19 g\u002Fkg' 乘上相對濕度 50%，得 9.5 g\u002Fkg'。\n(C) 12：不符合題目所問。這個數值是把溫度 24 當成被乘數、乘以 50% 所得：24 × 50 \u002F 100 = 12。溫度是決定飽和絕對濕度的狀態條件，不是水蒸氣量本身，不能直接拿來乘相對濕度；被乘數要換成同溫度下的飽和絕對濕度 19 g\u002Fkg'，結果才是 9.5 g\u002Fkg'。\n(D) 4.56：不符合題目所問。這個數值是把溫度 24 與飽和絕對濕度 19 相乘再除以 100 所得：24 × 19 \u002F 100 = 4.56。題目的乘數應是相對濕度 50%，不是溫度；溫度在本題的作用只是指明飽和絕對濕度是在哪個溫度下取值，改以 50% 相乘才得到 9.5 g\u002Fkg'。\n【演算步驟】\n公式：絕對濕度 x ≒ 相對濕度 φ × 飽和絕對濕度 xs\n① 相對濕度換成小數：φ = 50% = 50 \u002F 100 = 0.5\n② x = 0.5 × 19 g\u002Fkg' = 9.5 g\u002Fkg'\n【記憶點】絕對濕度看「含了多少水」，相對濕度看「含了幾成」，兩者用同溫度的飽和絕對濕度串起來。",524,1,true,[27,30,33,36,39,42],{"number":28,"session":7,"stem":29},2,"下列敘述何者錯誤？",{"number":31,"session":7,"stem":32},3,"在臺灣 5 月份某日正午時，某建築物之南向開窗設計如下，若在相同遮陽深度條件下，請依…",{"number":34,"session":7,"stem":35},4,"大樓建築最頂樓之夏季室溫常較中間樓層高，主要的原因與合理改善方式各為何？",{"number":37,"session":7,"stem":38},6,"下列熱環境指標，何者不考慮相對濕度的影響？",{"number":40,"session":7,"stem":41},7,"通風塔（wind tower）起源於下列何種氣候區？",{"number":43,"session":7,"stem":44},8,"室內水蒸氣發生量為 1.5 kg\u002Fh，室外空氣絕對濕度為 0.005 kg\u002Fkg'，…",[46,49,52,55,58],{"number":10,"session":47,"stem":48},"114180","下列那個措施無法防止冬季時壁體表面結露的發生？",{"number":10,"session":50,"stem":51},"113190","下列何者是高層建築物設置中間水槽或減壓閥的給水壓力（kg\u002Fcm2）臨界標準？",{"number":10,"session":53,"stem":54},"112190","單層均質材料的隔音性能與面密度有關，在質量控制頻域下，依質量法則（Mass Law）…",{"number":10,"session":56,"stem":57},"111180","若屋頂版的面積為 100 m2，整體構造材料的熱傳透率 U 值為 0.6 kcal\u002F…",{"number":10,"session":59,"stem":60},"110180","下列空間或場所作業之照度需求，何者要求最高？",1791863214098]