问题:汽机润滑油系统一般采用()。A、暗阀门B、明阀门C、铜制阀门D、铝制阀门...
Sunday, June 11, 2023
Tuesday, November 14, 2023
Friday, December 22, 2023
Tuesday, December 12, 2023
Monday, January 29, 2024
Tuesday, December 12, 2023
问题:大容量的发电机组采用封闭母线,其主要目的是防止发生()。A、单相接地B、相间短路C、人身触电D、美观...
Wednesday, August 30, 2023
Tuesday, December 12, 2023
Friday, December 22, 2023
Friday, May 26, 2023
问题:高压加热器运行中,水侧压力()汽侧压力。A、低于B、高于C、等于D、均可以...
Tuesday, December 12, 2023
Monday, January 29, 2024
Tuesday, December 12, 2023
Tuesday, November 1, 2022
Thursday, September 15, 2022
Tuesday, October 17, 2023
问题:给水温度下降,锅炉燃料量不变的情况下,过热汽温()。A、下降B、升高C、不变...
Friday, July 14, 2023
问题:交流电完成一次循环所需要的时间叫()。A、频率B、周期C、速率D、正弦曲线...
Tuesday, November 14, 2023
问题:电机转速小于700r/min时,振动值应小于()。A、0.06mmB、0.10mmC、0.12mmD、0.16mm...
Tuesday, December 12, 2023
Monday, January 29, 2024