Question #675
Unless otherwise specified by the manufacturer, the permissible wear limits for a hook on a ladle crane are:
Jeśli producent nie określi inaczej, dopuszczalne graniczne kryteria zużycia haka w suwnicach lejniczych wynosi:
a
5% increase in throat opening, 10% wear
5% rozgięcie, 10% wytarcie
b
10% increase in throat opening, 5% wear
10% rozgięcie, 5% wytarcie
c
10% increase in throat opening, 10% wear
10% rozgięcie, 10% wytarcie
d
5% increase in throat opening, 5% wear
5% rozgięcie, 5% wytarcie
Correct answer
Why?
For a ladle crane (suwnica lejnicza) hook, the limits are a 5% increase in the original throat opening (rozgięcie) and a 5% reduction in the nominal section height of the load-bearing part due to wear (wytarcie). The 10% wear limit applies to typical general-purpose hooks, not hooks carrying molten metal. The manufacturer's requirements take priority.