單項(xiàng)選擇題
A.2B.4C.8D.16
A.1B.2C.3D.1.5
A.60B.50C.70D.100
A.0.001B.0.002C.0.004D.0.005
A.冷卻水進(jìn)出口壓差大B.管路堵塞C.被冷卻的介質(zhì)溫度高D.進(jìn)口溫度高
A.2~5MpaB.4~6MpaC.5~8MpaD.8~10Mpa
A.放熱反應(yīng)B.吸熱反應(yīng)C.絕熱反應(yīng)D.物理分離
A.0.1MpaB.0.4MpaC.1.6MpaD.0.5Mpa
A.尾氣壓縮機(jī)出口溫度上升B.乙苯加料量下降C.第一脫氫反應(yīng)器入口溫度降低D.脫氫單元主蒸汽壓力波動(dòng)
A.≤0.02%B.≤0.01%C.≤0.05%D.≤0.03%
A.1-2B.2-4C.3-5D.1-4