A grape harvester fills a basket and empties it elsewhere, then returns to harvest more. At what point may he eat grapes?
Workers on attached produce eat after completing each unit of work — in this case, filling and emptying the basket constitutes one unit. They may eat after completing a basket (or the Sages' leniency: while walking between rows). Not during mid-harvest.
Question 2
A worker is hired to separate dried figs into groups. May he eat from them?
Separating dried figs constitutes work that comes after the tithe-obligating stage has been completed. The produce is now tevel (untithed and forbidden to eat). Workers may not eat it unless the owner tithes it for them.
Question 3
A worker is hired to harvest figs. May he eat grapes that are nearby in the same field?
The eating right is limited to the specific produce the worker is laboring with. A fig harvester eats figs, not grapes. A grape harvester eats grapes from the vine he is working on, not from another vine.
Question 4
A worker wants to give some of his permitted eating to his wife who is at home. Is this permitted?
The eating right is strictly personal. The worker cannot give or send his permitted eating to his wife and children. Even a nazirite prohibited from eating grapes cannot redirect his permitted portion to family members.
Question 5
Workers in a vat who have not yet walked both the length and width of the vat — may they drink wine?
Workers in a vat who have not yet walked both lengthwise and laterally are still working only with grapes, not with wine. They may eat grapes but not drink wine. Once they tread and walk both ways, they work with both grapes and wine and may drink from both.