阿摩線上測驗 登入

最新科目

最新試卷

最新試題

最新申論題

最新課程

最新主題筆記

最新討論

76 距 γ 點射源外某處之曝露率為 12 個單位,若要降至 5 個單位,假設增建因數為 1.0,則需在兩者之 間置入約多少個半值層屏蔽? (A) 2.69 (B) 1.93 (C) 1.54 (D) 1.26

71.「游離輻射防護安全標準」規定,除搶救生命外之緊急曝露人員,劑量儘可能不超過多少? (A)50毫西弗 (B) 100毫西弗 (C)250毫西弗 (D)500毫西弗

71.依據游離輻射防護安全標準,有關緊急曝露人員之劑量規定,下列何者正確? (A)為搶救生命,劑量限値為單一年劑量限度的5倍 (B)為防止嚴重危害,劑量限値為單一年劑量限度之20倍 (C)緊急曝露所接受之劑量,應與職業曝露之劑量合併記錄 (D)為減少大量集體有效劑量,劑量限値為單一劑量限度之2倍

614.A vehicle in the inner lane intending to turn left at an intersection should: (A) Display the turn signal 30meters before the intersection and turn left at the center of the intersection. (B) Turn left immediatelyupon reaching the intersection. (C) Display the right turn signal and turn left.

615.On road sections with curve, slope, narrow bridge, or tunnel signs, or at railway level crossings: (A) Uturns are allowed. (B) U-turns are allowed at speeds below 5 km/h. (C) U-turns are not allowed.

616.Before making a U-turn: (A) Stop and display the left turn signal or hand signal, check for traffic in bothdirections, watch for pedestrians, then make the U-turn. (B) Glance left and right, and turn when clear. (C)Honk 3 times, then make the U-turn.