1) Their primary function is to form a durable, water-repellent barrier on the skin. a) Cream b) Ointment c) Lotion d) Emulsion 2) One of the advantages of Ointment is High Viscosity. a) True b) False 3) These are often called greaseless bases because they contain no oil, fat, or other oleaginous components. a) Oleagenous base b) Water-in-oil emulsion base c) Absorption bases d) Water-soluble base 4) A key requirement in ophthalmic packaging is strict sterility. a) True b) False 5) What type of ointment base is described below? a) Oleagenous base b) Absorption bases c) Water-in-oil emulsion base d) Water-soluble base 6) Which equipment is primarily used to create stable emulsions when manufacturing cosmetic creams? a) Chiller system b) Vacuum homogenizer mixer c) Scraped surface heat exchanger d) Horizontal plate apparatus 7) Why is controlled cooling important after the emulsification step in cream production? a) To increase the fragrance intensity b) To prevent phase separation or unwanted crystal formation c) To speed up the packaging process d) To enhance product color 8) Which instrument is used to measure the viscosity of non-Newtonian creams? a) pH meter b) HPLC system c) Brookfield viscometer d) Karl Fischer apparatus 9) What is the main purpose of Karl Fischer titration in cream or gel quality testing? a) To determine pH b) To measure water content accurately c) To evaluate spreadability d) To identify API concentration 10) Which type of gel is characterized by being clear, non-greasy, and able to hold large amounts of water? a) Organogel b) Single-phase gel c) Biphasic gel d) Hydrogel

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