A person builds a roof on a storage warehouse. Must he add a guardrail?
Halacha 1 limits the guardrail obligation to buildings used as dwellings; warehouses, cattle barns, and similar structures do not require a guardrail.
Question 2
What is the minimum height required for a valid guardrail?
Halacha 3 specifies that a guardrail must be at least ten handbreadths high so that a person leaning against it will not fall.
Question 3
Why does the prohibition on uncovered liquids still apply even if nine people already drank from the vessel safely?
Halacha 13 explains that snake venom behaves differently — sinking, floating, or suspending — so even if nine people drank safely, the tenth must not, since the venom may be concentrated in the remaining portion.
Question 4
Which of the following is NOT one of the five liquids forbidden when left uncovered?
Halacha 7 lists the five forbidden liquids as water, wine (even diluted), milk, honey, and brine. Olive oil and other liquids are not listed because venomous animals will not drink them.
Question 5
Dough was kneaded with water that had been left uncovered. What must be done with the dough?
Halacha 15 rules that dough kneaded with uncovered water must be burned — even if it is terumah, and even after baking, it remains forbidden.