凡失去控制并对财物和人身造成伤害的燃烧现象都为()。A、爆炸B、燃烧C、火灾D、闪燃...
Monday, October 30, 2023
中压泵扬程为()A、60米水柱B、80米水柱C、600米水柱D、1000米水柱...
Monday, May 8, 2023
凡新入厂职工必须经()三级安全教育,并经考试合格方可进入生产岗位...
Thursday, September 15, 2022
Thursday, September 15, 2022
当电压在10KW以下,高压供电和低压电力用户的电压变化,不得超过...
Thursday, September 15, 2022
计算题:(B-A-003)已知某泵的叶轮直径为D<sub>1<...
Thursday, September 15, 2022
为防止介质沿阀杆漏出,可在截止阀阀杆穿出阀盖部位用()来密封。A、机封B、填料C、垫片D、密封胶...
Saturday, February 3, 2024
Thursday, September 15, 2022
Monday, January 16, 2023
Tuesday, March 21, 2023
水泵在1500~3000转/分时,泵的径向振幅不超过()。...
Thursday, September 15, 2022
Friday, March 29, 2024
热从物质的一部分传到另一部分的现象叫()。A、热辐射B、热对流C、热传导D、爆炸...
Sunday, May 7, 2023
Wednesday, March 8, 2023
Thursday, September 15, 2022
蒸汽往复泵单向阀有敲击声,说明()。A、弹簧紧了或断了B、弹簧卡死C、无弹簧D、排气不均匀...
Friday, August 25, 2023
Thursday, September 15, 2022
在实际生产中,生产性毒物常以气体、蒸汽、雾、烟或粉尘的形式污染生...
Monday, September 12, 2022
Thursday, September 15, 2022
Monday, September 12, 2022