When a deck cargo is secured with chain or wire lashings and grab (pear) links,which statement is FALSE?()
A. The amount of take-up is limited by the length of the turnbuckle
B. At the grab (pear) link,the slack end of chain should be led back and secured to the chain above the link
C. The lashings should be inspected each day and any slack taken up
D. The turnbuckle should be secured with a stick or lock nut
叶漏水量较大的机组,导叶全关后,机组转速很难达到25%ne,则制动转速应适当()。
A. 提高;
B. 降低;
C. 不变;
D. 可提高也可降低;
企业正在修理改造中尚未投入使用的设备称为()
A. 生产用机器设备
B. 未使用机器设备
C. 不需用机器设备
D. 融资租入机器设备
直角角焊接的焊脚尺寸应满足hfmin≥1.5√t1及hfmax≤1.2·t2,则t1、t2分别为()的厚度。
A. t1为厚焊件,t2为薄焊件
B. t1为薄焊件,t2为厚焊件
C. t1、t2皆为厚焊件
D. t1、t2皆为薄焊件