Back to Course Various Utensils and Their Method of Kashering 0% Complete 0/0 Steps Quiz 1 of 0 Various Utensils and Their Method of Kashering Lemaan Yilmedu January 26, 2026 Various Utensils and Their Method of Kashering Time limit: 0 Quiz Summary 0 of 10 Questions completed Questions: Information You have already completed the quiz before. Hence you can not start it again. Quiz is loading… You must sign in or sign up to start the quiz. You must first complete the following: Results Quiz complete. Results are being recorded. Results 0 of 10 Questions answered correctly Your time: Time has elapsed You have reached 0 of 0 point(s), (0) Earned Point(s): 0 of 0, (0) 0 Essay(s) Pending (Possible Point(s): 0) Categories Not categorized 0% Show Question 1 Show Question 2 Show Question 3 Show Question 4 Show Question 5 Show Question 6 Show Question 7 Show Question 8 Show Question 9 Show Question 10 Review / Skip Answered Correct Incorrect Question 1 of 10 1. Question What does the Gemara rule in regard to kashering knives? Both the blade and the handle are to undergo “hagalah” in boiling water in a keli rishon. There is no need at all to do “libun”. Correct Incorrect Correct answer The blade should undergo “libun” with fire, while the handle undergoes “hagalah” in a keli rishon – since the blade absorbs more than does the handle. Correct Incorrect Correct answer Both the blade and the handle are to undergo “libun” with fire – since a knife is always used with cutting meat on the fire. Correct Incorrect Correct answer The blade should undergo “hagalah”, while the handle undergoes “libun” with fire – since the handle touches human hands and absorbs more than does the blade. Correct Incorrect Correct answer Correct Incorrect Question 2 of 10 2. Question Why is the Shulchan Aruch lenient to allow kashering knives for Pesach with “hagalah” and not require the method of “libun”? Since knives are usually used on for cutting with cold foods and not hot ones – thus, they have no stringent level of absorption. Correct Incorrect Correct answer Since it takes into account the view who hold that the absorption of chometz prior to Pesach is a permissible one, and most of the knife’s use is not in direct contact with the heat. Correct Incorrect Correct answer Since knives are made of hard metal that does not absorb flavors at all. As such, a regular rinsing of the knife is sufficient. Correct Incorrect Correct answer Because knives are smaller and do not touch the fire directly, the absorption is a lesser one, and “hagalah” is sufficient. Correct Incorrect Correct answer Correct Incorrect Question 3 of 10 3. Question Why should you sharpen your knife before performing “hagalah”? Since the rust prevents the boiling water from reaching the knife – and therefore it always needs to be removed entirely. Correct Incorrect Correct answer Since the rust itself is considered chometz which remains on the knife from the duration of the year – and it must be removed entirely. Correct Incorrect Correct answer Since the Chachomim decreed regarding every knife which has rust – that it must always be removed from it prior to undergoing “hagalah”. Correct Incorrect Correct answer Because there is cause for concern perhaps there is tangible residue of chometz under the rust that is present in it, and it must be removed. Correct Incorrect Correct answer Correct Incorrect Question 4 of 10 4. Question In regard to a knife which has grooves and cannot be cleaned well – what is the din? It must undergo “hagalah” twice: Once for the grooves, and a second time for the entire knife – in order to remove everything. Correct Incorrect Correct answer One must purchase a new knife, since it is impossible to kasher a knife with grooves, even if it were to undergo “libun”. Correct Incorrect Correct answer It is permitted to perform “hagalah” on it without “libun”, since the grooves are very small – and they do not contain any substantial tangible chometz. Correct Incorrect Correct answer “Hagalah” alone is not sufficient in this case, and it requires “libun” in the grooves, in order to burn out whatever tangible residue is there. Correct Incorrect Correct answer Correct Incorrect Question 5 of 10 5. Question What is the din regarding baskets in which meat is salted? It is forbidden to use them at all on Pesach, since there was certainly chometz in the salt, and the baskets absorbed a very intense taste. Correct Incorrect Correct answer It is preferable to perform “hagalah” by “pouring from a keli rishon”, since there may have possibly been chometz in the salt, and if so, it became absorbed in the baskets through the salting process. Correct Incorrect Correct answer It is permitted to use them without undergoing any kashering, since it is not known for certain that there was indeed chometz in the salt – and we do not put it under a “chazakah” of issur. Correct Incorrect Correct answer It requires “libun gamur”, since the absorption through the salting is a very intense one, and it is similar to an absorption which is directly on the fire. Correct Incorrect Correct answer Correct Incorrect Question 6 of 10 6. Question What is the din regarding a pan that is used for frying with oil? It requires “libun gamur”, since at times the oil dries out and what's inside became baked without oil on the fire. Correct Incorrect Correct answer It depends on the type of pan: An iron pan requires “libun”, while an aluminum pan suffices with just “hagalah”. Correct Incorrect Correct answer It is permitted after undergoing “hagalah”, since frying is considered as “cooking”, and there is moistness of liquid even if the oil dries out. Correct Incorrect Correct answer It depends on the quantity of the oil: If there is a lot of oil – it suffices with “hagalah”, while if there is only a bit of oil – it always requires “libun gamur”. Correct Incorrect Correct answer Correct Incorrect Question 7 of 10 7. Question Why does an iron covering placed over a cake of dough need to undergo “libun”? Since the covering gets hot from the cake and sweats from the heat, the sweat returns to the cake and re-absorbs the chometz back from the cover. Correct Incorrect Correct answer Since it is common that the covering touches the cake itself and absorbs the chometz taste through the direct heat of the fire. Correct Incorrect Correct answer Since this cake is similar to a cake which is baked in an oven – and all vessels of an oven require “libun gamur” as it is always ruled in halacha. Correct Incorrect Correct answer Since the Chachomim enacted in regard to every covering of a baked item which requires “libun gamur” – in order to leave no uncertainty of absorption. Correct Incorrect Correct answer Correct Incorrect Question 8 of 10 8. Question What is the din in regard to a mortar used for spices? In practical halacha: It is permitted if it undergoes “hagalah”, since the absorption came through a sharp food, and it can be expunged via “hagalah” according to most Rishonim. Correct Incorrect Correct answer It is forbidden even if it undergoes “hagalah”, since the absorption that came through a sharp food cannot always be expunged according to the view of all Rishonim. Correct Incorrect Correct answer It requires “libun gamur”, since the sharp spices cause a very deep absorption, one that is similar to absorption on the fire. Correct Incorrect Correct answer It depends on the material: A wooden mortar requires peeling off its surface layer, while a metal mortar always requires “libun gamur” in any event. Correct Incorrect Correct answer Correct Incorrect Question 9 of 10 9. Question Why can’t we use mixing bowls for kneading – even after it has undergone “hagalah”? Since the mixing bowls are similar to a beis se’or (sourdough container) whose fermentation is intense, and “hagalah” is thus insufficient for them, according to all Rishonim. Correct Incorrect Correct answer Since mixing bowls are always very large, and it isn’t possible to insert them into the kashering pot for a proper “hagalah” process. Correct Incorrect Correct answer Since it is difficult to clean them well from the tangible residue – in crevices which aren’t visible to the eye. And so is the accepted custom. Correct Incorrect Correct answer Because the mixing bowls are made from wood, and wood absorbs very deeply – so that “hagalah” is not effective in expunging the absorption. Correct Incorrect Correct answer Correct Incorrect Question 10 of 10 10. Question What is the din regarding surfaces where one usually places hot chometz foods? They must be kashered by “pouring from a keli rishon”, since “as it absorbs – so it releases”, since at times soup is spilled onto the surface. Correct Incorrect Correct answer They require “libun gamur”, since boiling pots – which are a keli rishon – are placed on these surfaces, and the absorption is very intense. Correct Incorrect Correct answer A simple rinsing suffices – since the surfaces do not absorb flavor from foods that are simply placed on them without liquid. Correct Incorrect Correct answer It depends on the material: A wooden surface requires the said “pouring” process, while a marble surface requires “libun”, since marble absorbs more than wood does. Correct Incorrect Correct answer Correct Incorrect
